Impact modifier combination for polymers
US7015261B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2001 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | May 21, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L51/085
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved impact modifier for polymers, such as PBT and blends thereof; is disclosed. The impact modifier is a blend of (A) a core/shell additive having a core based on alkyl acrylate, on a polyorganosiloxane rubber or a blend thereof and a shell based on poly(alkyl methacrylate), or on a styrene-acrylonitrile copolymer grafted onto the core; and (B) a linear copolymer which contains from 50 to 85 parts of units derived from ethylene, from 5 to 40 parts of units derived from (meth)acrylic esters, and from 2 to 10 parts of a copolymerizable monomer containing an epoxy group. The impact strength provided by the impact modifier blend is unexpectedly higher than the impact strength provided by each individual component of the blend.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.