Release agent and product
AssigneeSekisui Kagaku Kogyo Kabushiki Kaisha
InventorTakaji Kishi
Life of this patent
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Abstract
A release agent comprising (A) a polymer of at least one vinyl monomer of the general formula CH.sub.2 .dbd.CR.sub.1 COO(CH.sub.2 CHR.sub.2 O).sub.n CONHR (I) wherein R.sub.1 and R.sub.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) above and another compound copolymerizable therewith, or a mixture of said polymer (A) and said copolymer (B); and a product prepared by coating the said release agent on a non-adhesive surface of an adhesive article having an adhesive surface and the non-adhesive surface or on the surface of a release paper.
Claims8
A release agent comprising:
- (A) a polymer of at least one vinyl monomer of the formula
- CH.sub.2 .dbd.CR.sub.1 COO(CH.sub.2 CHR.sub.2 O).sub.n CONHR (I)
- wherein R.sub.1 and R.sub.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,
- said vinyl monomer of formula (I) being an adduct of a compound of the following formula
- CH.sub.2 .dbd.CR.sub.1 COO(CH.sub.2 CHR.sub.2 O).sub.n H (II)
- wherein R.sub.1, R.sub.2 and n are as defined above, with a compound of the following formula
- RNCO (III)
- wherein R is as defined above,
- (B) a copolymer of at least one vinyl monomer of general formula (I) above and at least one other monomer selected from the group consisting 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 acid, methacrylic acid, monoesters of maleic acid, monoesters of itaconic acid, crotonic acid, maleic anhydride, glycidyl methacrylate acrylonitrile, methyl vinyl ketone, and N-vinyl pyrrolidone, or
- (C) a mixture of said polymer (A) and said copolymer (B).
The release agent of claim 8 wherein said trunk polymer itself has a release action.
Dependencies are inferred from the claim text.