Patent EP0541395A1 successfully refreshed from Google Patents.
EP0541395A1
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Coating agents
Assignee: Takemoto Oil and Fat Co Ltd
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Filing: 1992-11-06
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Granted: —
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Expires: 2012-11-06
Abstract
Abstract Coating agents to be applied onto base materials such as thermoplastic resin films to provide improved surface characteristics include an aqueous emulsion of polysiloxane-polyvinyl graft copolymer essentially of specified kinds of siloxane units.
Inventors
- 👤 Ippei Noda
- 👤 Masami Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 15:38
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/12; C08F283/124; C09; C09D; C09D151/00; C09D151/08; C09D151/085; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/26; Y10T428/269; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31786
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
209 words
A coating agent comprising an aqueous emulsion of polysiloxane-polyvinyl graft copolymer comprising siloxane unit (A) and siloxane unit (B), the molar ratio of siloxane units (A) and (B) being from 99/1 to 0/100, said siloxane unit (A) including at least one unit selected from the group consisting of units of Formula (1) and units of Formula (2), said siloxane unit (B) including at least one unit selected from the group consisting of units of Formula (3), units of Formula (4) and units of Formula (5), units of Formula (2) and/or Formula (5) being present in an amount equal to or greater than 0.5 molar % of the total of siloxane units, said Formulas (1) through (5) being given by: R 2 1 SiO SiO₂ R³SiO 3/2 where R¹-R³ are same or different substituted or non-substituted hydrocarbon groups having a carbon atom directly connected to a silicon atom and not having radical polymerization property; A¹ is a divalent organic group having a carbon atom directly connected to a silicon atom and being connected to B¹; A² is a divalent organic group having a carbon atom directly connected to a silicon atom and being connected to B²; and B¹ and B² are a vinyl monomer block or a vinyl polymer block.
Claim 2
Dependent Claim
50 words
The coating agent of Claim 1 wherein said B¹ in said Formula (2) and said B² in said Formula (5) are each a vinyl polymer block obtained by graft polymerization of vinyl monomers containing one or more kinds selected from the group consisting of aromatic vinyl monomers and alkyl (meth)acrylates.
Claim 3
Dependent Claim
64 words
The coating agent of Claim 1 wherein said B¹ in said Formula (2) and said B² in said Formula (5) are each a vinyl polymer block obtained by graft polymerization of vinyl monomers containing by weight 2% or more of one or more vinyl monomers selected from the group consisting of aromatic vinyl monomers, vinyl carboxylates and alkyl (meth)acrylates, each having a fluorine-substituted group.
Claim 4
Dependent Claim
28 words
The coating agent of any of Claims 1 to 3 wherein said siloxane units (A) and (B) are contained at molar ratio (A)/(B) in the range of 99/1-80/20.
Claim 5
Dependent Claim
23 words
The coating agent of any of Claims 1 to 4 wherein the average diameter of particles of said polysiloxane-polyvinyl graft copolymer is 0.01-0.5µm.
Claim 6
Dependent Claim
21 words
The coating agent of any of Claims 1 to 5 which is applied on a polyester film or a polyester sheet.
Claim 7
Dependent Claim
43 words
A coating agent according to Claim 1 wherein the molar ratio of siloxane units (A)/(B) is 0 to 100, siloxane units of Formula (5) being present in an amount greater than or equal to 0.5 molar % of the total of siloxane units.
Claim 8
Dependent Claim
42 words
The coating agent of Claim 7 wherein B² in units of Formula (5) is a vinyl polymer block obtained by graft polymerization of vinyl monomers containing one or more kinds selected from the group consisting or aromatic vinyl monomers and alkyl (meth)acrylates.
Claim 9
Dependent Claim
55 words
The coating agent of Claim 7 wherein B² in units of Formula (3) is a vinyl polymer block obtained by graft polymerization of vinyl monomers containing 2 weight % or more of one or more kinds selected from the group consisting of aromatic vinyl monomers, vinyl carboxylates and alkyl (meth)acrylates, each having a fluorine-substituted group.
Claim 10
Dependent Claim
23 words
The coating agent of any of Claims 7 to 9 wherein the average diameter of particles of said polysiloxane-polyvinyl graft copolymer is 0.01-0.µm.
Claim 11
Dependent Claim
21 words
The coating agent of any of Claim 7 to 10 which is applied on a polyester film or a polyester sheet.
Claim 12
Independent Claim
126 words
A method of producing a coating agent comprising an aqueous emulsion of polysiloxane-polyvinyl graft copolymer, comprising the following steps: (a) forming a silanol compound by hydrolysis of one or more compounds each capable of forming one or more silanol groups on hydrolysis, said hydrolysis being performed in an aqueous medium in the presence of an acid or alkali hydrolysis-inducing catalyst; (b) forming an aqueous emulsion of a polyorganosiloxane by polycondensation of the silanol compound formed in step (a) in the presence of a polycondensation catalyst; and (c) addition of vinyl monomers and a catalyst for radical polymerisation to the aqueous emulsion of polyorganosiloxane formed in (b), so as to induce grafting, graft polymerisation or graft copolymerisation, thus introducing vinyl monomers or polymer blocks into said polyorganosiloxane.
Claim 13
Dependent Claim
34 words
A method according to Claim 12 wherein the compounds capable of forming silanol groups on hydrolysis include up to 4 molar % of a compound capable of forming only one silanol group on hydrolysis.
Claim 14
Dependent Claim
50 words
A method according to Claim 11 or Claim 12 wherein the compounds capable of forming silanol groups on hydrolysis include less than 7.5 molar % of compounds having functional groups which enable introduction in step (c) of the vinyl monomer or polymer blocks to the polyorganosiloxane formed in step (b).
Claim 15
Dependent Claim
30 words
A method according to Claim 14 wherein the functional groups which enable introduction in step (c) of the vinyl monomer or polymer blocks are radical polymerisable groups or thiol groups.
Claim 16
Independent Claim
33 words
A method according to any of Claims 11 to 15 wherein the compounds capable of forming silanol groups include from 5-30 molar % of compounds having hydrocarbon groups substituted by a polar group.
Claim 17
Independent Claim
27 words
A method according to any of Claims 11 to 16 in which the aqueous medium used in step (a) contains water in an amount ≧30 weight %.
Claim 18
Independent Claim
31 words
A method according to any of Claims 12 to 17 wherein the weight ratio of (polyorganosiloxane part) to (grafted, graft polymerised or graft copolymerised vinyl part) is from 99:1 to 22:78.
Claim 19
Independent Claim
28 words
A method according to any of Claims 12 to 18 wherein the concentration of polysiloxane-polyvinyl graft copolymer in the aqueous emulsion is from 5 to 50% by weight.
References Cited (Backward Citations)
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