Toughened mercaptosiloxane modified bulk polymerized vinylic polymers
US4070414A · kind A · utility
12Cited by
3References
20Claims
0Family size
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Key dates
| Filing date | Apr 23, 1976 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Apr 23, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F283/124
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Improvement in impact strength of certain vinylic polymers is obtained by dissolving a mercaptosiloxane-dimethylsiloxane copolymer in a vinylic monomer and converting the monomer to a polymer by bulk or suspension polymerization in the presence of a free radical generator. For example, a copolymer of mercaptopropylmethylsiloxane and dimethylsiloxane is dissolved in styrene and the styrene is copolymerized with acrylonitrile in bulk and/or in water suspension using benzoyl peroxide as a catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.