US4600751A
Expired / Lapsed
US
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Hydrophilic silicone-organic copolymer elastomers
Assignee: Dow Silicones Corp
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Filing: 1984-12-18
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Granted: 1986-07-15
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Expires: 2004-12-18
Abstract
Abstract This invention provides compositions which are curable to hydrophilic, water-absorbing silicone-organic copolymer elastomers via free radical polymerization such as by the use of free radical precursors, UV or electron beam. The compositions are mixtures of (A) from 50 to 95 parts by weight of block copolymers containing polydiorganosiloxane segments and polyalkyleneoxy segments which block copolymers contain terminal aliphatically unsaturated groups such as those derived from the reaction of isocyanoethyl methacrylate with terminal free hydroxyl groups present on the polyalkyleneoxy segments and (B) from 5 to 50 parts by weight of at least one substantially water insoluble aliphatically unsaturated organic monomer which is compatible with (A) such as methyl methacrylate. The cured elastomers, some of which are optically clear, are useful as membranes for gas or fluid separations or for the controlled release of bioactive agents such as insecticides or herbicides.
Inventors
- 👤 Chi-Long Lee
- 👤 Wen-Bin Shyu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:29
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/08; C09; C09D; C09D155/00; C09D155/005; C08F283/00; C08F283/12; C08F283/122; C08F290/00; C08F290/02; C08F290/06; C08F290/068; C08F290/08; C08F290/14; C08F290/148; C09D151/00; C09D151/08; C09D151/085; C09D4/00; C09D4/06
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
252 words
A composition curable to a water-absorbing hydrophilic silicone-organic copolymer elastomer consisting essentially of (A) from 50 to 95 parts by weight of at least one block copolymer of the formula ##STR11## wherein a is an integer of from 4 to 49, inclusive, b is an integer of from 0 to 15, inclusive, c is an integer having a value of from 2 to 4, inclusive, d is an integer of from 0 to 25, inclusive, e is an integer of from 5 to 50 inclusive d+e is no greater than 50 and e is greater than or equal to d, f is 0 or 1, f' is 0 or 1, f+f'+b is at least 2, R is a monovalent hydrocarbon or halohydrocarbon radical of from 1 to 6 inclusive carbon atoms which is free of aliphatic unsaturation, R' is a methyl or a phenyl radical, Z is a monovalent radical selected from the group consisting of CH 2 ═CR"COOR"'NHCOO--, and CH 2 ═CR"COO--, R" is an alkyl radical of from 1 to 4 inclusive carbon atoms or hydrogen, R"'is a divalent hydrocarbon radical of from 1 to 6 inclusive carbon atoms, and (B) from 5 to 50 parts by weight of at least one substantially water insoluble aliphatically unsaturated organic monomer which is compatible with said (A), wherein upon curing said composition, an elastomer is obtained which is hydrophilic and capable of absorbing at least 3% by weight of water based upon the total weight of said elastomer before exposure to water.
Claim 2
Dependent Claim
252 words
A composition curable to a water-absorbing hydrophilic silicone-organic copolymer elastomer consisting essentially of (A) from 50 to 95 parts by weight of at least one block copolymer of the formula ##STR11## wherein a is an integer of from 4 to 49, inclusive, b is an integer of from 0 to 15, inclusive, c is an integer having a value of from 2 to 4, inclusive, d is an integer of from 0 to 25, inclusive, e is an integer of from 5 to 50 inclusive d+e is no greater than 50 and e is greater than or equal to d, f is 0 or 1, f' is 0 or 1, f+f'+b is at least 2, R is a monovalent hydrocarbon or halohydrocarbon radical of from 1 to 6 inclusive carbon atoms which is free of aliphatic unsaturation, R' is a methyl or a phenyl radical, Z is a monovalent radical selected from the group consisting of CH 2 ═CR"COOR"'NHCOO--, and CH 2 ═CR"COO--, R" is an alkyl radical of from 1 to 4 inclusive carbon atoms or hydrogen, R"'is a divalent hydrocarbon radical of from 1 to 6 inclusive carbon atoms, and (B) from 5 to 50 parts by weight of at least one substantially water insoluble aliphatically unsaturated organic monomer which is compatible with said (A), wherein upon curing said composition, an elastomer is obtained which is hydrophilic and capable of absorbing at least 3% by weight of water based upon the total weight of said elastomer before exposure to water.
Claim 3
Dependent Claim
50 words
The composition as claimed in claim 1 wherein said (B) is at least one monomer of the formula ##STR12## Wherein W is selected from the group consisting of --COOR"", --OOCCH 3 and --C 6 H 5 wherein R"" is an alkyl radical of from 1 to 6 inclusive carbon atoms.
Claim 4
Dependent Claim
54 words
The composition as claimed in claim 2 wherein a is an integer of from 8 to 14, inclusive, c is 3 or 4, d is 0, e is an integer of from 10 to 20, inclusive, R is a methyl, phenyl or 3,3,3-trifluoropropyl radical, and Z is CH 2 ═CR"COO(CH 2 ) 2 NHCOO--.
Claim 5
Dependent Claim
30 words
The composition as claimed in claim 3 wherein R and R' are each methyl radicals and wherein said composition contains from 30 to 50 parts by weight of said (B).
Claim 6
Dependent Claim
11 words
The composition as claimed in claim 3 wherein b is 0.
Claim 7
Dependent Claim
15 words
The composition as claimed in claim 5 wherein R and R' are each methyl radicals.
Claim 8
Dependent Claim
47 words
The composition as claimed in claim 3 wherein said composition contains from 30 to 50 parts by weight of said (B) and said (B) is selected from the group consisting of CH 2 ═CCH 3 COOCH 3 , CH 2 ═CHC 6 H 5 and mixtures thereof.
Claim 9
Dependent Claim
47 words
The composition as claimed in claim 6 wherein said composition contains from 30 to 50 parts by weight of said (B) and said (B) is selected from the group consisting of CH 2 ═CCH 3 COOCH 3 , CH 2 ═CHC 6 H 5 and mixtures thereof.
Claim 10
Dependent Claim
29 words
The composition as claimed in claim 1 which additionally includes from 0.1 to 10 parts by weight per 100 parts of (A) and (B) of a free radical initiator.
Claim 11
Dependent Claim
31 words
The composition as claimed in claim 3 which additionally includes from 0.1 to 10 parts by weight per 100 parts by weight of (A) and (B) of a free radical initiator.
Claim 12
Dependent Claim
31 words
The composition as claimed in claim 4 which additionally includes from 0.1 to 10 parts by weight per 100 parts by weight of (A) and (B) of a free radical initiator.
Claim 13
Dependent Claim
31 words
The composition as claimed in claim 6 which additionally includes from 0.1 to 10 parts by weight per 100 parts by weight of (A) and (B) of a free radical initiator.
Claim 14
Dependent Claim
34 words
A water-absorbing, hydrophilic silicone organic elastomer comprising a polymerization product formed after maintaining the composition of claim 1 under free radical polymerization conditions for a sufficient amount of time to obtain said polymerized product.
Claim 15
Dependent Claim
34 words
A water-absorbing, hydrophilic silicone organic elastomer comprising a polymerization product formed after maintaining the composition of claim 3 under free radical polymerization conditions for a sufficient amount of time to obtain said polymerized product.
Claim 16
Dependent Claim
35 words
A water absorbing, hydrophilic silicone organic elastomer comprising a polymerization product formed after maintaining the composition of claim 4 under free radical polymerization conditions for a sufficient amount of time to obtain said polymerized product.
Claim 17
Dependent Claim
34 words
A water-absorbing, hydrophilic silicone organic elastomer comprising a polymerization product found after maintaining the composition of claim 6 under free radical polymerization conditions for a sufficient amount of time to obtain said polymerized product.
Claim 18
Dependent Claim
18 words
A water-absorbing, hydrophilic silicone organic elastomer comprising a polymerization product obtained upon polymerizing the composition of claim 9.
Claim 19
Dependent Claim
18 words
A water-absorbing, hydrophilic silicone organic elastomer comprising a polymerization product obtained upon polymerizing the composition of claim 10.
Claim 20
Dependent Claim
18 words
A water-absorbing, hydrophilic silicone organic elastomer comprising a polymerization product obtained upon polymerizing the composition of claim 11.
Claim 21
Dependent Claim
18 words
A water-absorbing, hydrophilic silicone organic elastomer comprising a polymerization product obtained upon polymerizing the composition of claim 12.
Claim 22
Dependent Claim
13 words
A membrane comprised of the water-absorbing, hydrophilic silicone organic elastomer of claim 13.
Claim 23
Dependent Claim
13 words
A membrane comprised of the water-absorbing, hydrophilic silicone organic elastomer of claim 14.
Claim 24
Dependent Claim
13 words
A membrane comprised of the water-absorbing, hydrophilic silicone organic elastomer of claim 15.
Claim 25
Dependent Claim
13 words
A membrane comprised of the water-absorbing, hydrophilic silicone organic elastomer of claim 16.
References Cited (Backward Citations)
US3484394A
Cited
US4136250A
Cited
US4235985A
Cited
US4369300A
Cited
US4260725A
Cited
US4309529A
Cited
US4320221A
Cited
US4496210A
Cited
EP0108886A2
Cited
US4486577A
Cited
EP0127321A1
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
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