Polycarbonate-polydiorganosiloxane copolymer
US8962780B2 · kind B2 · utility
26Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2010 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Oct 3, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L83/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
It is an object of the present invention to provide a polycarbonate-polydiorganosiloxane copolymer having improved transparency. The present invention is the polycarbonate-polydiorganosiloxane copolymer comprises a polycarbonate block and a polydiorganosiloxane block, wherein (i) the copolymer has an aggregation structure comprising a matrix of the polycarbonate and polydiorganosiloxane domains dispersed therein; (ii) the polydiorganosiloxane domains have an average size of 5 to 40 nm and a normalized dispersity of not more than 30%; and (iii) the total light transmittance is not less than 88%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.