US3872038A
Expired / Lapsed
US
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Aqueous based release composition
Assignee: Wacker Chemical Corp
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Filing: 1973-12-03
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Granted: 1975-03-18
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Expires: 1993-12-03
Abstract
Abstract An aqueous release composition comprising a silicone emulsion, lubricant and a filler. The composition is useful as a release agent, especially in the manufacturing of tires.
Inventors
- 👤 William Kiger Adams
- 👤 James Alan Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:21
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/64; C08K; C08K3/00; C08K3/34; C08K5/00; C08K5/04; C08K5/10; C08L1/00; C08L71/00; B29K; B29K2021/00; C08G; C08G77/00; C08G77/04; C08G77/045; C08G77/20; C08G77/22; C08G77/24; C08G77/70; C10; C10M; C10M2201/00; C10M2201/02; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/083; C10M2201/084; C10M2201/085; C10M2201/10; C10M2201/102; C10M2201/103; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2207/00; C10M2207/04; C10M2207/044; C10M2207/08; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/107; C10M2209/108; C10M2209/12; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/10; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/042; C10M2229/043; C10M2229/044; C10M2229/05; C10M2229/051
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
106 words
A RELEASE COMPOSITION COMPRISING A SILICONE EMULSION IN AN AMOUNT TO PROVIDE FROM 2 TO 25 PERCENT BY WEIGHT OF SILICONE IN SAID RELEASE COMPOSITION, B FROM 0.1 TO 5 PERCENT BY WEIGHT OR A DISPERSING AGENT, C FROM 0 TO 25 PERCENT BY WEIGHT OF A LUBRICANT, D FROM 20 TO 60 PERCENT BY WEIGHT OF A FILLER, E FROM 0.02 TO 1.5 PERCENT BY WEIGHT OF A SUSPENDING AGENT, AND F AT LEAST 20 PERCENT BY WEIGHT OF WATER BASED ON THE WEIGHT OF THE RELEASE COMPOSITION, SAID SILICONE EMULSION IS OBTAINED BY (1) MIXING AN ORGANOPOLYSILOXANE FLUID HAVING RECURRING UNITS OF THE FORMULA
Claim 2
Dependent Claim
106 words
A RELEASE COMPOSITION COMPRISING A SILICONE EMULSION IN AN AMOUNT TO PROVIDE FROM 2 TO 25 PERCENT BY WEIGHT OF SILICONE IN SAID RELEASE COMPOSITION, B FROM 0.1 TO 5 PERCENT BY WEIGHT OR A DISPERSING AGENT, C FROM 0 TO 25 PERCENT BY WEIGHT OF A LUBRICANT, D FROM 20 TO 60 PERCENT BY WEIGHT OF A FILLER, E FROM 0.02 TO 1.5 PERCENT BY WEIGHT OF A SUSPENDING AGENT, AND F AT LEAST 20 PERCENT BY WEIGHT OF WATER BASED ON THE WEIGHT OF THE RELEASE COMPOSITION, SAID SILICONE EMULSION IS OBTAINED BY (1) MIXING AN ORGANOPOLYSILOXANE FLUID HAVING RECURRING UNITS OF THE FORMULA
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein the organopolysiloxane fluid used in the preparation of the silicone dispersion is dimethylpolysiloxane.
Claim 4
Dependent Claim
10 words
The composition of claim 1 wherein the filler is mica.
Claim 5
Dependent Claim
17 words
The composition of claim 1 wherein the lubricant is a polyglycol copolymer of ethylene and propylene glycol.
Claim 6
Dependent Claim
12 words
The composition of claim 1 wherein the suspending agent is sodium carboxymethylcellulose.
Claim 7
Dependent Claim
57 words
The composition of claim 1 wherein the release composition contains from 20 to 50 percent by weight of mica, 5 to 15 percent by weight of a polyglycol, a sufficient amount of silicone emulsion to provide from 5 to 18 percent by weight of silicone in said release composition, and the remainder of the composition being water.
Claim 8
Dependent Claim
60 words
The composition of claim 1 wherein the release composition contains 41 percent by weight of mica, 1 percent by weight of lecithin, 11 percent by weight of a polyglycol, a sufficient amount of silicone emulsion to provide a 5.5 percent by weight of silicone based on the weight of the release composition and the remainder of the composition being water.
Claim 9
Dependent Claim
37 words
The composition of claim 1 wherein the silicone gum has a plasticity value of from 95 to 105 and is present in the silicone dispersion in a weight ratio of silicone gum to organopolysiloxane fluid of 1:7.
Claim 10
Independent Claim
41 words
A method for preparing an aqueous release composition which comprises adding a silicone gum having a plasticity value of from 80 to 120 millimeters to an organic solvent with agitation, adding an organopolysiloxane fluid having recurring structural units of the formula
Claim 11
Independent Claim
41 words
A method for preparing an aqueous release composition which comprises adding a silicone gum having a plasticity value of from 80 to 120 millimeters to an organic solvent with agitation, adding an organopolysiloxane fluid having recurring structural units of the formula
Claim 12
Dependent Claim
51 words
The method of claim 9 wherein the silicone gum has the unit formula RnSiO4-n/2 in which R is selected from the group consisting of a monovalent hydrocarbon radical and a halogenated monovalent hydrocarbon radical having from 1 to 18 carbon atoms and n has a value of from 1.9 to 2.1.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |