Polystyrene-polyisoprene-polystyrene block copolymers, hot melt adhesive compositions, and articles produced therefrom
US5143968A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 11, 1989 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Aug 11, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2883
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Polystyrene-polyisoprene-polystyrene block copolymers, hot-melt adhesive compositions constituted of polystyrene-polyisoprene-polystyrene block copolymers, and articles of manufacture produced therefrom. These copolymers possess blocks of high average molecular weight polystyrene (12,000 to 20,000) and low overall average molecular weight (60,000 to 110,000) such that when blended in requisite proportions with a compatible tackifier resin, preferably also a secondary tackifying resin or plasticizing oil, and stabilizer, superior hot-melt adhesive compositions can be formed. The hot-melt adhesive compositions possess, inter alia, superior heat resistance, superior static time to failure with low viscosity, good peel adhesion, good tack, and high ability to bond to a polyethylene or polypropylene substrate at temperatures below that which may damage the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.