Toughened mercaptosiloxane modified emulsion polymerized vinylic polymers
US4071577A · kind A · utility
19Cited by
5References
7Claims
0Family size
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Key dates
| Filing date | Apr 23, 1976 |
| Grant date | Jan 31, 1978 |
| Priority date | — |
| Expiry date | Apr 23, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F283/122
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The impact strength of certain thermoplastic vinylic polymers is improved by polymerizing the corresponding monomers in an emulsion of a diorganosiloxane containing units of the formula HSR'SiR.sub.n O.sub.3-n/2. For example a styrene acrylonitrile copolymer containing 20 percent by weight of a dimethylsiloxane-3-mercaptopropylsiloxane copolymer having 1 mol percent mercaptosiloxane has an Izod notched impact strength of 10.8 foot pounds per inch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.