Addition curable compositions prepared from silicone block copolymers
US4529629A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1984 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | Jun 8, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is provided a curable composition comprising: PA0 (A) an organopolysiloxane block copolymer comprising: PA1 (i) at least one siloxane block consisting essentially of from about 6 to about 120 units of the formula R.sub.2 SiO, PA1 (ii) at least one siloxane block consisting essentially of from about 3 to about 160 units of the formula R.sup.1 SiO.sub.1.5, PA1 (iii) optionally, at least one siloxane block consisting essentially of from 1 to about 80 units of the formula R.sup.2 SiO.sub.1.5, and PA1 (iv) at least one siloxane block consisting essentially of from about 0.1 to about 10 mole percent of the sum of (i), (ii) and (iii) of units of the formula RR.sup.3 SiO, PA0 where R is a C.sub.1-5 substituted or unsubstituted alkyl radical or a C.sub.6-10 substituted or unsubstituted aryl or alkaryl radical, R.sup.1 is a C.sub.6-10 substituted or unsubstituted aryl or alkaryl radical, R.sup.2 is a C.sub.1-5 substituted or unsubstituted alkyl radical and R.sup.3 is a C.sub.2-5 alkenyl radical; PA0 (B) an organohydrogenpolysiloxane, and PA0 (C) a catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.