Patent US3684756A successfully refreshed from Google Patents.
US3684756A
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Mold release compositions from mixtures of silicone resins and siloxane fluids
Assignee: Wacker Chemical Corp
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Filing: 1970-07-07
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Granted: 1972-08-15
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Expires: 1990-07-07
Abstract
Abstract A mold release composition at least 70 percent of an alkyl terminated organopolysiloxane fluid and at least 2 percent of a partially alkoxylated silicone resin having a hydrolysis level of from 40 to 70 percent and at least 4 percent based on the weight of the resin of a curing agent.
Inventors
- 👤 Howard Larry Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:49
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/64; C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
18 words
The composition of claim 1 wherein the organopolysiloxane has a carbon to silicon ratio of at least 2.
Claim 2
Dependent Claim
30 words
The composition of claim 1 wherein the organopolysiloxane has the formula: wherein R, R'' and R'''' represent organic groups and y is a value of from 80 to about 150,000.
Claim 3
Dependent Claim
14 words
The composition of claim 3 wherein R, R'' and R'''' represent lower alkyl groups.
Claim 4
Dependent Claim
11 words
The composition of claim 3 wherein R is a methyl radical.
Claim 5
Dependent Claim
11 words
The composition of claim 1 wherein the curing agent is tetraoctyltitanate.
Claim 6
Dependent Claim
19 words
The composition of claim 1 wherein the silicone resin is obtained from a mixture containing methyltrichlorosilane, dimethyldichlorosilane and propyltrichlorosilane.
Claim 7
Dependent Claim
28 words
The composition of claim 7 wherein the residue obtained from the hydrolysis of propyltrichlorosilane with methanol and water and boiling above 143* C. is substituted for the propyltrichlorosilane.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |