Block chlorinated polyolefins as physical property enhancers for polymer blends
US6780907B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Apr 13, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/035
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A means to improve thermoplastic formulations in terms of the physical properties they exhibit, such as impact strength and ductility, have been developed. The addition of a block chlorinated polyolefin (b-CPO) to polymer blends in which at least one component comprises a halogen-free hydrogen-bond acceptor polymer, achieves the desired enhancement. The synergetic effect of the b-CPO with the selected polymer blend is demonstrated. Blends of thermoplastic polyurethanes, polycarbonates, copolyesters and copolyamides with a blend partner such as thermoplastic polyolefins, styrenic copolymers such as styrene acrylonitrile copolymers, styrene ethylene butylene styrene copolymers, high rubber graft copolymers such as acrylonitrile butadiene styrene copolymers, methylmethacrylate butadiene styrene copolymers and the b-CPO have enhanced ductility and impact resistance. The addition of 0.5 wt. % of b-CPO has been shown to improve impact strength by as much as 85% and elongation at break exhibited by the blend by as much as 170%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.