Living radical graft copolymerization of vinyl monomers initiated from the structural defects of polyvinylchloride
US6437044B1 · kind B1 · utility
1Cited by
3References
43Claims
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Key dates
| Filing date | Jan 26, 2001 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Jan 26, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2438/01
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A graft copolymer composition and the preparation of the composition by living radical polymerization is disclosed. The polymerization reaction can be initiated at active chlorine sites on the poly(vinyl chloride) backbone in conjunction with a transition metal catalyst and an optional ligand. The graft copolymers are useful as, among others, compatibilizers for blends and alloys, as high heat distortion temperature poly(vinyl chloride) materials, as impact modifiers, and permanently plasticized materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.