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US4981727A Expired / Lapsed US ⏱️ 0.0 years remaining

Polyfluoropolyethers having pendant perfluoroalkoxy groups

Assignee: 3M Co
•
Filing: 1988-10-21
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Granted: 1991-01-01
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Expires: 2008-10-21
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Abstract

Abstract Normally liquid peroxidic poly(perfluorooxyalkylene) compositions comprising a mixture of peroxidic poly(perfluorooxyalkylene) compounds, derivatives of the poly(perfluorooxyalkylene) compositions comprising a mixture of non-peroxidic polyfluoropolyether compounds, and derivatives of the polyfluoropolyether compositions comprising functional and non-functional derivatives of the polyfluoropolyether compositions are provided. Each peroxidic poly(perfluorooxyalkylene) compound comprises a backbone of randomly distributed perfluorooxyalkylene units, represented by the formulas ##STR1## which when bonded to an --O-- of any of the perfluorooxyalkylene units, forms a peroxy group, --O--O--, which imparts the peroxidic characteristics to the material, and backbone-pendant perfluoroalkoxy groups or perfluoroalkoxy groups substituted with one or more ether oxygen atoms, the terminal ether oxygen atoms of which are bonded to carbon atoms of the ##STR2## backbone units.

Inventors

  • 👤 Steven P. Brinduse
  • 👤 Anthony B. Clinch
  • 👤 Daniel K. McIntyre
  • 👤 Allen L. Noreen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 18:12
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/002; C08G65/005; C08G65/007; C08G65/02; C08G65/32; C08G65/329; C08G65/331; C08G65/332; C08L; C08L71/00; C08L71/02; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582

Claims Analysis

Total Claims: 21
Claim 1
Independent Claim 94 words
A method of making a substrate with a liner comprising the steps of (a) providing a solution of a polymerizable polyfluoropolyether composition said composition comprising a polymer having a backbone comprising randomly distributed, perfluorooxyalkylene units represented by the formulas ##STR161## and backbone-pendant perfluoroalkoxy groups, the terminal ether oxygen atoms of which are boned to carbon atoms of the ##STR162## backbone units; (b) coating said solution onto said substrate; (c) drying said coating; (d) polymerizing said monomer in situ to provide a release liner in the form of a cohesive network adhered to said substrate.
Claim 2
Independent Claim 94 words
A method of making a substrate with a liner comprising the steps of (a) providing a solution of a polymerizable polyfluoropolyether composition said composition comprising a polymer having a backbone comprising randomly distributed, perfluorooxyalkylene units represented by the formulas ##STR161## and backbone-pendant perfluoroalkoxy groups, the terminal ether oxygen atoms of which are boned to carbon atoms of the ##STR162## backbone units; (b) coating said solution onto said substrate; (c) drying said coating; (d) polymerizing said monomer in situ to provide a release liner in the form of a cohesive network adhered to said substrate.
Claim 3
Dependent Claim 513 words
The method of claim 1 wherein said polymerizable polyfluoropolyether composition comprises non-peroxidic polyfluoropolyethers represented by the formula ##STR163## where Y is any terminal functional group which is or contains a functional moiety which can enter into an addition or condensation reaction to form a homopolymer or copolymer; R 6 is Y, a perfluoroalkyl group, or a haloperfluoroalkyl group; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure (R 3 O) f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 --and ##STR164## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; k is a number representing the average number of (CF 2 O) units randomly distributed within the chain and has a value of 1 to 200; l is a number representing the average number of (CF 2 O) units randomly distributed within the chain and has a value of 1 to 200; p and p' are each a number representing the average number of ##STR165## units, respectively, randomly distributed within the chain, the sum of p and p' has a value of 1 to 50, and p/p' is 0 to 5; the ratio k/l is less than 5; the ratio (p+p')/(k+l) is 0.01 to 1.5; and the number average molecular weight of the polyfluoropolyether is from about 650 to 20,000 or polyfluoropolyethers represented by the formula ##STR166## wherein Y is a terminal functional group which is or contains a functional moiety; R 7 is a perfluoroalkyl group, haloperfluoroalkyl, or the terminal functional group Y; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a saturated perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure (R 3 O) f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 -- and ##STR167## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero of a number having a value of 1 to 6; q is a number representing the average number of (CF 2 O) units randomly, distributed within the chain and has a value of 1 up to about 50; r is a number representing the average number of ##STR168## units randomly distributed within the chain and has a value of 5 up to about 50; s and s' are each a number representing the average number of ##STR169## units, respectively, randomly distributed within the chain, the sum of s and s' has a value of 1 to about 50, and the ratio s/s' is 0 to 5; the ratio q/r is 0.01 to 1.0; the ratio (s+s')/(q+r) is 0.01 to 1.0; and the number average molecular weight of the polyfluoropolyether is from about 650 to 10,000.
Claim 4
Independent Claim 76 words
A method of forming a shaped article comprising (a) providing a mixture comprising a polymerizable polyfluoropolyether composition said composition comprising a polymer having a backbone comprising randomly distributed, perfluorooxyalkylene units represented by the formulas ##STR170## and backbone-pendant perfluoroalkoxy groups, the terminal ether oxygen atoms of which are bonded to carbon atoms of the ##STR171## backbone units and an initiator; (b) forming said mixture into a desired shape; (c) polyerizing said polyfluoropolyether to form said shaped article.
Claim 5
Independent Claim 76 words
A method of forming a shaped article comprising (a) providing a mixture comprising a polymerizable polyfluoropolyether composition said composition comprising a polymer having a backbone comprising randomly distributed, perfluorooxyalkylene units represented by the formulas ##STR170## and backbone-pendant perfluoroalkoxy groups, the terminal ether oxygen atoms of which are bonded to carbon atoms of the ##STR171## backbone units and an initiator; (b) forming said mixture into a desired shape; (c) polyerizing said polyfluoropolyether to form said shaped article.
Claim 6
Dependent Claim 513 words
The method of claim 3 wherein said polymerizable polyfluoropolyether composition comprises non-peroxidic polyfluoropolyethers represented by the formula ##STR172## where Y is any terminal functional group which is or contains a functional moiety which can enter into an addition or condensation reaction to form a homopolymer or copolymer; R 6 is Y, a perfluoroalkyl group, or a haloperfluoroalkyl group; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure (R 3 O) f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 --and ##STR173## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; k is a number representing the average number of (CF 2 O) units randomly distributed within the chain and has a value of 1 to 200; l is a number representing the average number of (CF 2 O) units randomly distributed within the chain and has a value of 1 to 200; p and p' are each a number representing the average number of ##STR174## units, respectively, randomly distributed within the chain, the sum of p and p' has a value of 1 to 50, and p/p' is 0 to 5; the ratio k/l is less than 5; the ratio (p+p')/(k+l) is 0.01 to 1.5; and the number average molecular weight of the polyfluoropolyether is from about 650 to 20,000 or polyfluoropolyethers represented by the formula ##STR175## wherein Y is a terminal functional group which is or contains a functional moiety; R 7 is a perfluoroalkyl group, haloperfluoroalkyl, or the terminal functional group Y; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a saturated perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure (R 3 O) f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 --and ##STR176## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; q is a number representing the average number of (CF 2 O) units randomly distributed within the chain and has a value of 1 up to about 50; r is a number representing the average number of ##STR177## units randomly distributed within the chain and has a value of 5 up to about 50; s and s' are each a number representing the average number of ##STR178## units, respectively, randomly distributed within the chain, the sum of s and s' has a value of 1 up to about 50, and the ratio s/s' is 0 to 5; the ratio q/r is 0.01 to 1.0; the ratio (s+s')/(q+r) is 0.01 to 1.0; and the number average molecular weight of the polyfluoropolyether is from about 650 to 10,000.
Claim 7
Dependent Claim 341 words
A process the preparing peroxidic poly(perfluorooxyalkylene) compositions comprising peroxidic poly(perfluorooxyalkylenes) represented by the formula ##STR179## wherein Q is selected from --COF, --CF 2 COF, and --CF 2 COOH; W is a terminal group selected from Q and --C a F 2a+1 and --C a F 2a Cl where a is an integer up to 5; each R 1 is independently a fluorine or a perfluoroalkyl group selected from linear, branched, and cyclic groups; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms independently selected from units having the structure (R 3 O) f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 --and ##STR180## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero of a number having a value of 1 to 6; and b is a number representing the average number of --CF 2 O--units randomly distributed within the chain and has a value of 1 or greater; c is a number representing the average number of ##STR181## units randomly distributed within the chain and has a value of 1 or greater; d and d' are each a number representing the average number of ##STR182## units; respectively, randomly distributed within the chain, the sum or d and d' has a value of t or greater and the ratio d/d' is 0 to 5; e is a number representing the average number of --O--units randomly distributed within the chain and has a value of 1 or greater; the ratio b/c is less than 5; the ratio (d+d')/(b+c) is 0.01 to 1.5; the ratio e/(b+c+d+d') is 0.0001 to 1; and the number average molecular weight of the poly(perfluorooxyalkylene) is from about 650 to 1,000,000 comprising the steps (a) introducing into a reaction vessel reactants comprising one or more perfluoroolefins, one or more perfluoro(alkyl vinyl) ethers, and oxygen; and (b) subjecting the mixture to actinic radiation.
Claim 8
Dependent Claim 341 words
A process the preparing peroxidic poly(perfluorooxyalkylene) compositions comprising peroxidic poly(perfluorooxyalkylenes) represented by the formula ##STR179## wherein Q is selected from --COF, --CF 2 COF, and --CF 2 COOH; W is a terminal group selected from Q and --C a F 2a+1 and --C a F 2a Cl where a is an integer up to 5; each R 1 is independently a fluorine or a perfluoroalkyl group selected from linear, branched, and cyclic groups; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms independently selected from units having the structure (R 3 O) f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 --and ##STR180## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero of a number having a value of 1 to 6; and b is a number representing the average number of --CF 2 O--units randomly distributed within the chain and has a value of 1 or greater; c is a number representing the average number of ##STR181## units randomly distributed within the chain and has a value of 1 or greater; d and d' are each a number representing the average number of ##STR182## units; respectively, randomly distributed within the chain, the sum or d and d' has a value of t or greater and the ratio d/d' is 0 to 5; e is a number representing the average number of --O--units randomly distributed within the chain and has a value of 1 or greater; the ratio b/c is less than 5; the ratio (d+d')/(b+c) is 0.01 to 1.5; the ratio e/(b+c+d+d') is 0.0001 to 1; and the number average molecular weight of the poly(perfluorooxyalkylene) is from about 650 to 1,000,000 comprising the steps (a) introducing into a reaction vessel reactants comprising one or more perfluoroolefins, one or more perfluoro(alkyl vinyl) ethers, and oxygen; and (b) subjecting the mixture to actinic radiation.
Claim 9
Dependent Claim 327 words
A process for preparing inert non-peroxidic polyfluoropolyether compositions comprising polyfluoropolyethers represented by the formula ##STR183## each X is hydrogen or halogen and when X is hydrogen, then j is 1 or 2, and when X is halogen, then j is an interger of from 1 to 5; each R 1 is independently a fluorine or a perfluoroalkyl group selected from linear, branched, and cyclic groups; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a saturated perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O-- f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 -- and ##STR184## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6, and g is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 or greater; h is a number representing the average number of ##STR185## units randomly distributed within the chain and has a value of 1 or greater; i and i' are each a number representing the average number of ##STR186## units, respectively, randomly distributed within the chain, the sum of i and i' has a value of 1 or greater and i/i' is 0 to 5; the ratio g/h is less than 5; the ratio (i+i')/(g+h) is 0.01 to 1.5; and the number average molecular weight of the polyfluoropropolyether is 650 to 20,000 comprising the steps of (a) introducing into a reaction vessel reactants comprising one or more perfluoroolefins, one or more perfluoro(alkyl vinyl) ethers, and oxygen; (b) subjecting the mixture to actinic radiation; and (c) thermally treating the product of step (b) in the presence of an alkali metal hydroxide to form the polyfluoropolyether where X is hydrogen.
Claim 10
Dependent Claim 327 words
A process for preparing inert non-peroxidic polyfluoropolyether compositions comprising polyfluoropolyethers represented by the formula ##STR183## each X is hydrogen or halogen and when X is hydrogen, then j is 1 or 2, and when X is halogen, then j is an interger of from 1 to 5; each R 1 is independently a fluorine or a perfluoroalkyl group selected from linear, branched, and cyclic groups; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a saturated perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O-- f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 -- and ##STR184## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6, and g is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 or greater; h is a number representing the average number of ##STR185## units randomly distributed within the chain and has a value of 1 or greater; i and i' are each a number representing the average number of ##STR186## units, respectively, randomly distributed within the chain, the sum of i and i' has a value of 1 or greater and i/i' is 0 to 5; the ratio g/h is less than 5; the ratio (i+i')/(g+h) is 0.01 to 1.5; and the number average molecular weight of the polyfluoropropolyether is 650 to 20,000 comprising the steps of (a) introducing into a reaction vessel reactants comprising one or more perfluoroolefins, one or more perfluoro(alkyl vinyl) ethers, and oxygen; (b) subjecting the mixture to actinic radiation; and (c) thermally treating the product of step (b) in the presence of an alkali metal hydroxide to form the polyfluoropolyether where X is hydrogen.
Claim 11
Dependent Claim 16 words
The process of claim 1 comprising, after step (b) partially deperoxidizing the product of step (b).
Claim 12
Dependent Claim 28 words
The process of claim 6 further comprising chlorinating the product of step (b) or (c) to form the polyfluoropolyether of claim 1 where X is chlorine and fluorine.
Claim 13
Dependent Claim 24 words
The process of claim 6 further comprising fluorinating the product of step (c) to form the polyfluoropolyether of claim 1 where X is fluorine.
Claim 14
Dependent Claim 368 words
A process for preparing functional polyfluoropolyether compositions comprising non-peroxidic polyfluoropolyethers represented by the formula ##STR187## where Y is any terminal functional group which is or contains a functional moiety which can enter into an addition or condensation reaction to form a homopolymer or copolymer; R 6 is Y, a perfluoroalkyl group, or a haloperfluoroalkyl group; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O) f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 --and ##STR188## and R 4 a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; k is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 to 200; l is a number representing the average number of --CF 2 CF 2 O-- units randomly distributed within the chain and has a value of 1 to 200; p and p' are each a number representing the average number of ##STR189## units, respectively, randomly distributed within the chain, the sum of p and p' has a value of 1 to 50, and p/p' is 0 to 5; the ratio k/l is less than 5; the ratio (p+p')/(k+l) is 0.01 to 1.5; and the number average molecular weight of the polyfluoropolyether is from about 650 to 20,000 comprising the steps of (a) introducing into a reaction vessel reactants comprising one or more perfluoroolefins, one or more perfluoro(alkyl vinyl) ethers, and oxygen; (b) subjecting the mixture to actinic radiation; (c) partially deperoxidizing the product of step (b) by thermal and/or ultraviolet radiation; (d) reacting the partially deperoxidized product of step (c) with hydriodic acid and methanol to form difunctional methyl ester-terminated polyfluoropolyethers; (e) reacting the difunctional methyl ester-terminated polyfluoropolyethers of step (d) with at least one reactant having a group reactive with the methyl ester and a terminal functional group which can enter into an addition or condensation reaction to form a polymer.
Claim 15
Dependent Claim 368 words
A process for preparing functional polyfluoropolyether compositions comprising non-peroxidic polyfluoropolyethers represented by the formula ##STR187## where Y is any terminal functional group which is or contains a functional moiety which can enter into an addition or condensation reaction to form a homopolymer or copolymer; R 6 is Y, a perfluoroalkyl group, or a haloperfluoroalkyl group; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O) f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 --and ##STR188## and R 4 a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; k is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 to 200; l is a number representing the average number of --CF 2 CF 2 O-- units randomly distributed within the chain and has a value of 1 to 200; p and p' are each a number representing the average number of ##STR189## units, respectively, randomly distributed within the chain, the sum of p and p' has a value of 1 to 50, and p/p' is 0 to 5; the ratio k/l is less than 5; the ratio (p+p')/(k+l) is 0.01 to 1.5; and the number average molecular weight of the polyfluoropolyether is from about 650 to 20,000 comprising the steps of (a) introducing into a reaction vessel reactants comprising one or more perfluoroolefins, one or more perfluoro(alkyl vinyl) ethers, and oxygen; (b) subjecting the mixture to actinic radiation; (c) partially deperoxidizing the product of step (b) by thermal and/or ultraviolet radiation; (d) reacting the partially deperoxidized product of step (c) with hydriodic acid and methanol to form difunctional methyl ester-terminated polyfluoropolyethers; (e) reacting the difunctional methyl ester-terminated polyfluoropolyethers of step (d) with at least one reactant having a group reactive with the methyl ester and a terminal functional group which can enter into an addition or condensation reaction to form a polymer.
Claim 16
Dependent Claim 386 words
A process for preparing functional polyfluoropolyether compositions comprising non-peroxidic polyfluoropolyethers represented by the formula ##STR190## where Y is any terminal functional group which is or contains a functional moiety which can enter into an addition or condensation reaction to form a homopolymer or copolymer; R 6 is Y, a perfluoroalkyl group, or a haloperfluoroalkyl group; each OR 2 is independently a perfluoroallkoxy group wherein R 2 is a perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O-- f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 -- and ##STR191## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; k is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 to 200; l is a number representing the average number of --CH 2 CF 2 O-- units randomly distributed within the chain and has a value of 1 to 200; p and p' are each a number representing the average number of ##STR192## units, respectively, randomly distributed within the chain, the sum of p and p' has a value of 1 to 50, and p/p' is 0 to 5; the ratio k/l is less than 5; the ratio (p+p')/(k+l) is 0.01 to 1.5; and the number average molecular weight of the polyfluoropolyether is from about 650 to 20,000 comprising the steps of (a) introducing into a reaction vessel reactants comprising one or more perfluoroolefins, one or more perfluoro(alkyl vinyl) ethers, and oxygen; (b) subjecting the mixture to actinic radiation; (c) partially deperoxiding the product of step (b) by thermal and/or ultraviolet radiation; (d) reacting the partially deperoxidized product of step (c) with hydriodic acid and methanol to form difunctional methyl ester-terminated polyfluoropolyethers; (e) further reducing said difunctional methyl ester-terminated polyfluoropolyether with a hydride reducing agent to form difunctional hydroxy-terminated polyfluoropolyether, (f) reacting the difunctional hydroxy-terminated polyfluoropolyethers of step (e) with at least one reactant having a group reactive with the hydroxy and a terminal functional group which can enter into an addition or condensation reaction to form a polymer.
Claim 17
Dependent Claim 386 words
A process for preparing functional polyfluoropolyether compositions comprising non-peroxidic polyfluoropolyethers represented by the formula ##STR190## where Y is any terminal functional group which is or contains a functional moiety which can enter into an addition or condensation reaction to form a homopolymer or copolymer; R 6 is Y, a perfluoroalkyl group, or a haloperfluoroalkyl group; each OR 2 is independently a perfluoroallkoxy group wherein R 2 is a perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O-- f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 -- and ##STR191## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; k is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 to 200; l is a number representing the average number of --CH 2 CF 2 O-- units randomly distributed within the chain and has a value of 1 to 200; p and p' are each a number representing the average number of ##STR192## units, respectively, randomly distributed within the chain, the sum of p and p' has a value of 1 to 50, and p/p' is 0 to 5; the ratio k/l is less than 5; the ratio (p+p')/(k+l) is 0.01 to 1.5; and the number average molecular weight of the polyfluoropolyether is from about 650 to 20,000 comprising the steps of (a) introducing into a reaction vessel reactants comprising one or more perfluoroolefins, one or more perfluoro(alkyl vinyl) ethers, and oxygen; (b) subjecting the mixture to actinic radiation; (c) partially deperoxiding the product of step (b) by thermal and/or ultraviolet radiation; (d) reacting the partially deperoxidized product of step (c) with hydriodic acid and methanol to form difunctional methyl ester-terminated polyfluoropolyethers; (e) further reducing said difunctional methyl ester-terminated polyfluoropolyether with a hydride reducing agent to form difunctional hydroxy-terminated polyfluoropolyether, (f) reacting the difunctional hydroxy-terminated polyfluoropolyethers of step (e) with at least one reactant having a group reactive with the hydroxy and a terminal functional group which can enter into an addition or condensation reaction to form a polymer.
Claim 18
Dependent Claim 358 words
A process for preparing functional non-peroxidic polyfluoropolyether compositions comprising polyfluoropolyethers represented by the formula ##STR193## wherein Y is a terminal functional group which is or contains a functional moiety; R 7 is a perfluoroalkyl group, haloperfluoroalkyl, or the terminal functional group Y; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a saturated perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O-- f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 -- and ##STR194## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; q is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 up to about 50; r is a number representing the average number of ##STR195## units randomly distributed within the chain and has a value of 5 up to about 50; s and s' are each a number representing the average number of ##STR196## units, respectively, randomly distributed within the chain, the sum of s and s' has a value of 1 up to about 50, and the ratio s/s' is 0 to 5; the ratio q/r is 0.01 to 1.0; the ratio (s+s')/(q+r) is 0.01 to 1.0; and the number average molecular weight of the polyfluoropolyether is from about 650 to 10,000 comprising the steps of (a) introducing into a reaction vessel reactants comprising one or more perfluoroolefins, one or more perfluoro(alkyl vinyl) ethers, and oxygen; (b) subjecting the mixture to actinic radiation; (c) completely deperoxidizing the product of step (b) by heat and/or ultravioilet radiation; (d) treating the deperoxidized product of step (c) with a reducing agent to form a monofunctional alcohol-terminated polyfluoropolyethers; (e) reacting the monofunctional alcohol-terminated polyfluoropolyethers of step (d) with at least one reactant having a group reactive with the alcohol and a terminal functional group which can enter into an additiion or condensation reaction to form a polymer.
Claim 19
Dependent Claim 358 words
A process for preparing functional non-peroxidic polyfluoropolyether compositions comprising polyfluoropolyethers represented by the formula ##STR193## wherein Y is a terminal functional group which is or contains a functional moiety; R 7 is a perfluoroalkyl group, haloperfluoroalkyl, or the terminal functional group Y; each OR 2 is independently a perfluoroalkoxy group wherein R 2 is a saturated perfluoroalkyl group or perfluoroalkyl group substituted with one or more further ether oxygen atoms, independently selected from units having the structure --R 3 O-- f R 4 , in which each R 3 is independently selected from --CF 2 --, --CF 2 CF 2 -- and ##STR194## and R 4 is a perfluoroalkyl group selected from linear, branched, and cyclic groups, and f is zero or a number having a value of 1 to 6; q is a number representing the average number of --CF 2 O-- units randomly distributed within the chain and has a value of 1 up to about 50; r is a number representing the average number of ##STR195## units randomly distributed within the chain and has a value of 5 up to about 50; s and s' are each a number representing the average number of ##STR196## units, respectively, randomly distributed within the chain, the sum of s and s' has a value of 1 up to about 50, and the ratio s/s' is 0 to 5; the ratio q/r is 0.01 to 1.0; the ratio (s+s')/(q+r) is 0.01 to 1.0; and the number average molecular weight of the polyfluoropolyether is from about 650 to 10,000 comprising the steps of (a) introducing into a reaction vessel reactants comprising one or more perfluoroolefins, one or more perfluoro(alkyl vinyl) ethers, and oxygen; (b) subjecting the mixture to actinic radiation; (c) completely deperoxidizing the product of step (b) by heat and/or ultravioilet radiation; (d) treating the deperoxidized product of step (c) with a reducing agent to form a monofunctional alcohol-terminated polyfluoropolyethers; (e) reacting the monofunctional alcohol-terminated polyfluoropolyethers of step (d) with at least one reactant having a group reactive with the alcohol and a terminal functional group which can enter into an additiion or condensation reaction to form a polymer.
Claim 20
Dependent Claim 34 words
The process of claims 5, 6, 10, 11, or 1 wherein step (b) is carried out at a temperature of between about -100° C. and a pressure of between about 0.5 to 10 atmospheres.
Claim 21
Dependent Claim 26 words
The process of claims 5, 6, 10, 11, or 12 wherein said actinic radiation is ultraviolet radiation having a wavelength from about 1800 to 3000 A.

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