Organopolysiloxane resin, production method thereof, and curable organopolysiloxane resin composition using the same
US5844060A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1997 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | Nov 5, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided are an organopolysiloxane resin having a number average molecular weight of at least 500 and a silanol group content of at least 5 weight %, and comprising units of formula R.sup.1 SiO.sub.3/2, wherein R.sup.1 is a hydrogen atom or a monovalent substituted or unsubstituted hydrocarbon group having 1 to 18 carbon atoms, in a proportion of 30 to 100 mole %, the units of formula R.sup.1 SiO.sub.3/2 including 30-80 mole % of one silanol group-containing units of formula R.sup.1 Si(OH)O.sub.2/2 ; a production method of the aforesaid organopolysiloxane resin; and a curable organopolysiloxane resin composition comprising the aforesaid organopolysiloxane resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.