Cohesively failing hot melt pressure sensitive adhesive
US5741840A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1996 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Jul 3, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A hot melt pressure sensitive adhesive comprising a) from about 15% to about 30% by weight of a linear styrene-ethylene/butylene-styrene copolymer having a styrene content from about 15% to about 35% by weight and a coupling efficiency of less than about 75%; b) from about 20% to about 50% by weight of a tackifying resin selected from the group consisting of those tackifying resins having a softening point of less than about 100.degree. C.; c) from about 30% to about 50% by weight of a plasticizing oil; and d) up to about 15% of a compatible polymer wherein the total polymer content does not exceed 30% by weight of the adhesive wherein the hot melt pressure sensitive adhesive fails cohesively during use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.