Acrylic pressure-sensitive adhesives for low-energy surfaces and corrugated board
US5817426A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Dec 4, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31917
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides inherently tacky PSAs that exhibit excellent adhesion to paper, corrugated board and low-energy surfaces, and comprise an acrylic emulsion polymer formed from (a) a plurality of monomers comprising, based on the total weight of monomers, (i) 9 to 40% isobornyl acrylate and (ii) 50 to 91% of one or more alkyl acrylates; (b) at least one initiator; and at least one emulsifier. In an alternate embodiment, the polymer is formed by solvent polymerization, without an emulsifier. A method for making such PSAs is also provided. In one embodiment, polymerization initiators are added to a monomer emulsion in a stepped feed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.