Removable adhesive comprising acrylic microballs, acrylic copolymer and cross-linker
US5128412A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1990 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | May 14, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2301/302
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A removable adhesive composition comprising (i) 100 parts by weight of a copolymer (A) which is tacky at ordinary temperature, synthesized of 90 to 99.9% by weight of a nonfunctional vinyl type monomer (a) mainly composed of an acrylate or methacrylate ester having an alkyl group having 2 to 12 carbon atoms and 0.1 to 10% by weight of a functional vinyl type monomer (b) having one or more of a carboxyl group, a hydroxyl group, an amino group or an epoxy group in its molecule; (ii) 20 to 1,000 parts by weight of a copolymer (B) whose glass transition point is 10.degree. C. or less and also having a mean particle diameter of 0.5 to 300 .mu.m, synthesized of 90 to 99.9% by weight of a nonfunctional vinyl type monomer (a) mainly composed of acrylate or methacrylate ester having an alkyl group having 2 to 12 carbon atoms and 0.1 to 10% by weight of an .alpha.-monoolefinic carboxylic acid (c); and (iii) 0.01 to 5 parts by weight of a polyfunctional cross-linking agent (C) which is capable of reacting with the functional groups of said components (b) and (c), and the surfaces of said copolymer (B) being entirely covered with the copolymer (A). The removable adhesive composition of this in…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.