Non-yellowing tape article
US5547766A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1995 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Jul 28, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A non-yellowing pressure-sensitive adhesive tape with a polyolefin film layer and a fibrous web layer. A propylene film layer has an an antioxidant package of: PA1 (i) 0.004 to 0.04 weight percent of Irganox.TM. 1010; PA1 (ii) 0.03 to 0.2 weight percent of a solid phosphite antioxidant; PA1 (iii) 0.05 to 0.4 weight percent of a thioester; and PA1 (iv) 0.05 to 0.4 weight percent of an inorganic acid scavenger; The tackified synthetic rubber pressure-sensitive adhesive layer comprises 100 parts of a polystyrene-polydiene block copolymer, and 20 to 300 parts of a compatible tackifying agent and an antioxidant package, based on 100 parts of the polystyrene-polydiene block copolymer, comprising: PA1 (i) 0.1 to 0.6 parts Irganox.TM. 1010; PA1 (ii) 0.1 to 0.6 parts Irganox.TM. 565; PA1 (iii) 0.0 to 0.6 parts of a phosphite antioxidant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.