US4940743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone resin emulsion
Assignee: Momentive Performance Materials GmbH
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Filing: 1985-03-22
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Granted: 1990-07-10
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Expires: 2005-03-22
Abstract
Abstract A storage-stable aqueous emulsion of a low molecular weight, alkoxy-functional silicone resin by weight comprising approximately (a) 1-60% of a silicone resin having a viscosity of from 2 to 2000 mPa.s and of the formula ##EQU1## in which R 1 is a monovalent hydrocarbon group having 1 to 14 carbon atoms, R 2 is a monovalent hydrocarbon group having 1 to 18 carbon atoms, x is from 0.75 to 1.5, and y is from 0.2 to 2, (b) 0.1 to 10% of an emulsifying agent, and (c) 30 to 98.5% by weight of water, the emulsion having an alkaline pH, whereby the storage stability due to reduced hydrolysis is improved.
Inventors
- 👤 Wolfgang Grape
- 👤 Ottfried Schlak
- 👤 Armand DE Montigny
- 👤 Hermann Kober
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:17
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/495; C04B41/4961; C04B41/60; C04B41/61; C04B41/62; C04B41/64; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C04B2111/00; C04B2111/00034; C04B2111/00112; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
A storage-stable aqueous emulsion of a low molecular weight, alkoxy-functional silicone resin by weight comprising essentially of (a) 1-60% of a silicone resin having a viscosity of from 2 to 2000 mPa.s and of the formula ##EQU4## in which R 1 is a monovalent hydrocarbon group having 1 to 14 carbon atoms, R 2 is a monovalent hydrocarbon group having 1 to 18 carbon atoms, x is from 0.75 to 1.5, and y is from 0.2 to 2, (b) 0.1 to 10% of an emulsifying agent component, wherein the emulsifying agent component is a combination of two non-ionic emulsifiers, (c) 30 to 98.5% by weight of water, and (d) 0 to 3% of an emulsifying auxiliary which has a thickening effect, said emulsifying auxiliary being selected from the group consisting of the sodium salt of carboxymethyl cellulose, polyvinyl alcohols and urea, the emulsion having an alkaline pH.
Claim 2
Dependent Claim
147 words
A storage-stable aqueous emulsion of a low molecular weight, alkoxy-functional silicone resin by weight comprising essentially of (a) 1-60% of a silicone resin having a viscosity of from 2 to 2000 mPa.s and of the formula ##EQU4## in which R 1 is a monovalent hydrocarbon group having 1 to 14 carbon atoms, R 2 is a monovalent hydrocarbon group having 1 to 18 carbon atoms, x is from 0.75 to 1.5, and y is from 0.2 to 2, (b) 0.1 to 10% of an emulsifying agent component, wherein the emulsifying agent component is a combination of two non-ionic emulsifiers, (c) 30 to 98.5% by weight of water, and (d) 0 to 3% of an emulsifying auxiliary which has a thickening effect, said emulsifying auxiliary being selected from the group consisting of the sodium salt of carboxymethyl cellulose, polyvinyl alcohols and urea, the emulsion having an alkaline pH.
Claim 3
Dependent Claim
24 words
An emulsion according to claim 1, wherein the emulsifying component is a combination of two non-ionic emulsifiers and the pH is established by diethylethanolamine.
Claim 4
Dependent Claim
12 words
An emulsion according to claim 2, further containing an alkyl tin salt.
Claim 5
Dependent Claim
28 words
An emulsion according to claim 3, wherein said alkyl tin salt is selected from the group consisting of dibutyl tin dilaurate, dialkyl tin stearate and dialkyl tin octoate.
Claim 6
Dependent Claim
17 words
An emulsion according to claim 1, wherein the combination of two non-ionic emulsifying agents is POE(40)-triglyceride/POE(2)-oleyl alcohol.
Claim 7
Dependent Claim
16 words
An emulsion according to claim 1, wherein the combination of two non-ionic emulsifying agents is POE(40)-triglyceride/POE(6)-tridecylalcohol.
References Cited (Backward Citations)
US3076773A
Cited
US3624017A
Cited
DE2330887A1
Cited
US4324712A
Cited
US4433027A
Cited
US4539351A
Cited
US4524172A
Cited
EP0130521A1
Cited
US4582874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |