Organopolysiloxane compositions transformable into elastomers without use of vulcanizing agents
US4104239A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1977 |
| Grant date | Aug 1, 1978 |
| Priority date | — |
| Expiry date | Mar 4, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An organopolysiloxane composition is disclosed which is transformable into elastomers by heating without using any vulcanizing agent. These compositions comprise: PA1 [1] 100 parts by weight of at least one hydroxylated polydiorganosiloxane having a viscosity of between about 2.multidot.10.sup.5 and about 80.multidot.10.sup.6 cps at 25.degree. C. and containing 0.001 to 0.1% by weight of terminal hydroxy groups per weight of the polysiloxane; PA1 [2] at least 10 parts by weight of silica having a special surface of between about 100 and about 400 m.sup.2 /g; and PA1 [3] 0.5 to 15 parts by weight of at least one silane of the formula (I) ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and represent methyl or ethyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.