EP0024908A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Release agent and products comprising a coating thereof
Assignee: Sekisui Chemical Co Ltd
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Filing: 1980-08-22
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Granted: —
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Expires: 2000-08-22
Abstract
Abstract Organic release agents having a moderate peel strength are known, but in general have one or more of the defects that they are difficult to prepare, are insufficiently soluble in suitable solvents, have low softening points, tend to migrate, and are difficult to modify. The invention provides a release agent having a good balance of properties comprising (A) a polymer of at least one vinyl monomer of the general formula wherein R, and R 2 each represents hydrogen or methyl, R represents alkyl of at least 12 carbon atoms or fluoroalkyl of at least 6 carbon atoms, and n is an integer of from 1 to 6 (B) a copolymer of at least one vinyl monomer of general formula (I) above and another compound copolymerizable therewith, or a mixture of said polymer (A) and said copolymer (B). The invention also provides a product prepared by coating the release agent on the non-adhesive surface of an adhesive article having an adhesive surface and a non-adhesive surface or on the surface of a release paper.
Inventors
- 👤 Takaji Kishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 22:10
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/14; C09J; C09J7/00; C09J7/20; C09J7/201; C09J7/22; C09J7/40; C09J7/401; C08; C08L; C08L2205/00; C08L2205/02; C08L33/00; C08L33/04; C08L33/14; C09J2400/00; C09J2400/20; C09J2400/28; C09J2400/283; C09J2423/00; C09J2423/005; C09J2433/00; C09J2433/005; C09J2451/00; C09J2451/005; C09J2475/00; C09J2475/005; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2839; Y10T428/2848; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31591
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
93 words
A release agent comprising (A) a polymer of at least one vinyl monomer of the general formula wherein R 1 and R 2' independently from each other, represent hydrogen or a methyl group, R represents an alkyl group having at least 12 carbon atoms or a fluoroalkyl group having at least 6 carbon atoms, and n is an integer of from 1 to 6, (B) a copolymer of at least one vinyl monomer of general formula (I) and another compound copolymerizable therewith, or a mixture of said polymer (A) and said copolymer (B).
Claim 2
Dependent Claim
93 words
A release agent comprising (A) a polymer of at least one vinyl monomer of the general formula wherein R 1 and R 2' independently from each other, represent hydrogen or a methyl group, R represents an alkyl group having at least 12 carbon atoms or a fluoroalkyl group having at least 6 carbon atoms, and n is an integer of from 1 to 6, (B) a copolymer of at least one vinyl monomer of general formula (I) and another compound copolymerizable therewith, or a mixture of said polymer (A) and said copolymer (B).
Claim 3
Dependent Claim
51 words
A release agent according to claim 1' wherein said vinyl monomer of formula (I) is an adduct of a compound of the formula wherein R 1 , R 2 and n are as defined in claim 1, with a compound of the formula wherein R is as defined in claim 1.
Claim 4
Dependent Claim
20 words
A release agent according.to claim 1 or 2 wherein said polymer (A) is a homopolymer of said vinyl monomer (I).
Claim 5
Dependent Claim
26 words
A release agent according to claim 1 or 2 wherein said polymer (A) is a copolymer of at least two vinyl monomers of general formula (I).
Claim 6
Dependent Claim
20 words
A release agent according to claim 1 or 2 wherein the copolymerizable compound of said copolymer (B) is a monomer.
Claim 7
Dependent Claim
37 words
A release agent according to claim 5 wherein the copolymer (B) is derived from at least 40% by weight of said vinyl monomer of general formula (I) and at most 60% by weight of said other monomer.
Claim 8
Dependent Claim
81 words
A release agent according to claim 5 or 6 wherein said other monomer is at least one of stearyl acrylate, stearyl methacrylate, stearyl acrylamide, stearyl methacrylamide, vinyl stearate, stearyl vinyl ether, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, vinyl acetate, styrene, 2-hydroxyethyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, diethylene glycol monomethacrylate,tetraethylene glycol monomethacrylate, polypropylene glycol monomethacrylate, acrylic scid, methacrylic acid, monoesters of maleic acid, monoesters of itaconic acid, crotonic acid, maleic anhydride, glycidyl methacrylate acrylonitrile, methyl vinyl ketone, and N-vinyl purrolidone.
Claim 9
Dependent Claim
33 words
A release agent according to claim 1 or 2 wherein said copolymer (B) is a graft copolymer resulting from graft copolymerization of said vinyl monomer of general formula (I) with a trunk polymer.
Claim 10
Dependent Claim
16 words
A release agent according to claim 8 wherein said trunk polymer itself has a release action.
Claim 11
Dependent Claim
34 words
A product prepared by coating a release agent as claimed in any one of claims 1 to 9 on the non-adhesive surface of an adhesive article having an adhesive surface and a non-adhesive surface.
Claim 12
Dependent Claim
25 words
A product prepared by coating a release agent as claimed in any one of claims 1 to 9 on the surface of a release paper.
References Cited (Backward Citations)
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