Room temperature curable siloxane-based gels
US-2015376345-A1 · Dec 31, 2015 · US
Compositions of resin-linear organosiloxane block copolymers
US9212262B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9212262-B2 |
| Application number | US-201314381714-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 27, 2013 |
| Priority date | Feb 29, 2012 |
| Publication date | Dec 15, 2015 |
| Grant date | Dec 15, 2015 |
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Abstract
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A process is disclosed for preparing a resin-linear organosiloxane block copolymer by reacting a silanol terminated linear organosiloxane and an organosiloxane resin containing hydrolyzable groups to form a resin-linear organosiloxane block copolymer. The resulting resin-linear organosiloxane block copolymer is then crosslinked to sufficiently increase the average molecular weight of the resin-ituted organosiloxane block copolymer by at least 50%. The resin-linear organosiloxanes block copolymers prepared by the disclosed process may provide optically solid compositions which may be considered as “reprocessable.”
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for preparing an organopolysiloxane block copolymer comprising: I) reacting a) a linear organosiloxane having the formula R 1 2 (OH)SiO(R 1 2 SiO 2/2 ) n Si(OH)R 1 2 , R 1 3-q (E) q SiO(R 1 2 SiO 2/2 ) n Si(E) q R 1 3-q , or combinations of the two linear organosiloxanes, wherein each R 1 , at each occurrence, is independently a C 1 to C 30 hydrocarbyl, n is 10 to 400, E is a hydrolyzable group containing at…
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Electricity · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C08G77/44Primary
Chemistry & Metallurgy · mapped topic
Electricity · mapped topic
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- What does patent US9212262B2 cover?
- A process is disclosed for preparing a resin-linear organosiloxane block copolymer by reacting a silanol terminated linear organosiloxane and an organosiloxane resin containing hydrolyzable groups to form a resin-linear organosiloxane block copolymer. The resulting resin-linear organosiloxane block copolymer is then crosslinked to sufficiently increase the average molecular weight of the resin-…
- Who is the assignee on this patent?
- Dow Corning
- What technology area does this patent fall under?
- Primary CPC classification C08G77/44. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 15 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).