Pressure-sensitive adhesives for marking films
US5895801A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1997 |
| Grant date | Apr 20, 1999 |
| Priority date | — |
| Expiry date | Mar 31, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2301/302
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Inherently tacky polymerized copolymer particles are formed by emulsion polymerization for use as an PSA for marking films. The adhesives are the reaction product formed by emulsion polymerization of a first monomer mixture comprising at least one alkyl acrylate containing from 4 to about 12 carbon atoms in the alkyl group, at least one hard monomer, and at least one unsaturated carboxylic acid containing from 3 to about 5 carbon atoms and present in a total amount of from about 3 to about 6% by weight of the first monomers which there is added by the reaction product of a second monomer system comprising at least one alkyl acrylate containing from 4 to about 12 carbon atoms in at least one unsaturated carboxylic acid monomer present containing from 3 to about 5 carbon atoms in present in a total amount from about 7 to about 10% by weight of the monomers, said second copolymer being substantially free of other hard monomers in which said first copolymer is present in an amount at least 50% by weight of the total copolymers and has a glass transition temperature from 0 to about -25.degree. C. The second copolymer has a glass transition temperature of from about -25.degree. C. The co…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.