Propylene-alpha-olefin copolymer compositions with improved foaming window
US8883870B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Sep 15, 2010 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Sep 15, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The foaming window for making a foam useful in the manufacture of artificial leather is expanded through the use of a foamable composition comprising (A) a propylene-α-olefin copolymer, (B) a molecular melt (MM) comprising 4,4′-oxydibenzenesulfonylazide (DPO-BSA) and an antioxidant, and (C) a blowing agent. The foaming window can be expanded such that foaming can occur at 220° C. for 20 to 200 or more seconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.