Patent US6720373B2 successfully refreshed from Google Patents.
US6720373B2
Expired / Lapsed
US
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High solids emulsions of curable elastomeric polymers
Assignee: Dow Silicones Corp
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Filing: 2001-07-13
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Granted: 2004-04-13
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Expires: 2021-07-13
Abstract
Abstract Water-continuous emulsion of curable elastomeric polymers are disclosed having a solids content of greater than 75%, an average particle size less than 5 mum, and having sufficient stability to produce a stable lower solids emulsion upon dilution with water comprising; a curable elastomeric polymer, surfactant, internal cure additive, water, optional plasticizer, and optional low molecular weight acid. The water-continuous emulsions of curable elastomeric polymers can be prepared by; (I) forming a premix comprising an elastomeric polymer, surfactant, internal cure additive, and optionally a plasticizer and low molecular weight acid, and (II) adding water to the premix with mixing to form a water continuous emulsion of the curable elastomeric polymer having a solids content of greater than 75%, an average particle size less than 5 mum, and having sufficient stability to produce a stable lower solids emulsion upon dilution with water.
Inventors
- 👤 Shaow Burn Lin
- 👤 Todd Matthew Starke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:31
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08J3/26; C08J3/02; C08J3/03; C08C; C08C19/00; C08C19/25; C08F; C08F8/00; C08F8/42; C08K; C08K5/00; C08K5/0008; C08K5/0025; C08J2300/00; C08J2300/10; C08J2300/108; C08J2321/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
85 words
A water-continuous emulsion composition comprising; (A) 100 parts of curable elastomeric polymer having a viscosity of 0.5 to 1000,000 KPa-s and a glass transition temperature up to 50° C., (B) 3 to 30 parts surfactant (C) 0.5 to 50 parts of an internal cure additive (D) 5 to 45 parts water wherein the water-continuous emulsion has a solids content of greater than 75%, an average particle size less than 5 μm, having sufficient stability to produce a stable lower solids emulsion upon dilution with water.
Claim 2
Dependent Claim
85 words
A water-continuous emulsion composition comprising; (A) 100 parts of curable elastomeric polymer having a viscosity of 0.5 to 1000,000 KPa-s and a glass transition temperature up to 50° C., (B) 3 to 30 parts surfactant (C) 0.5 to 50 parts of an internal cure additive (D) 5 to 45 parts water wherein the water-continuous emulsion has a solids content of greater than 75%, an average particle size less than 5 μm, having sufficient stability to produce a stable lower solids emulsion upon dilution with water.
Claim 3
Dependent Claim
40 words
The water-continuous emulsion composition of claim 1 wherein the curable elastomeric polymer is a silylated polymer derived from elastomeric polymers selected from natural rubber, styrene-butadiene, butadiene, ethylene-propylene-diene (EPDM), butyl rubber, nitrile rubber, chloroprene rubber, fluorocarbon elastomers, polysulfide rubbers, and polyurethane.
Claim 4
Dependent Claim
31 words
The water-continuous emulsion composition of claim 1 wherein the curable elastomeric polymer is a silylated polyisobutylene polymer in which at least 50 mole percent of the repeat units are isobutylene units.
Claim 5
Dependent Claim
24 words
The water-continuous emulsion composition of claim 1 wherein the curable elastomeric polymer is a silylated copolymer of an isomonoolefin and a vinyl aromatic monomer.
Claim 6
Dependent Claim
94 words
The water-continuous emulsion composition of claim 4 wherein the silylated copolymer is the reaction product of a) an olefin copolymer comprising at least 50 mole % of a C 4 to C 7 isomonoolefin and from 0.1 up to 50 mole % of a vinyl aromatic monomer; b) a silane of the general formula RR′SiY 2 wherein R represents a monovalent olefinically unsaturated hydrocarbon or hydrocarbonoxy radical, each Y represents a hydrolyzable organic radical and R′ represents an alkyl radical, an aryl radical or a Y radical; and c) a free radical generating agent.
Claim 7
Dependent Claim
27 words
The water-continuous emulsion composition of claim 4 wherein the silylated copolymer comprises at least 60 mole % of at least one C 4 to C 7 isomonoolefin.
Claim 8
Dependent Claim
20 words
The water-continuous emulsion composition of claim 4 wherein said vinyl aromatic monomer is an alkylstyrene and said alkylstyrene comprises para-methylstyrene.
Claim 9
Dependent Claim
29 words
The water-continuous emulsion composition of claim 7 wherein the silylated copolymer comprises at least 80 mole % of isobutylene and from 0.1 up to 20 mole % of para-alkylstyrene.
Claim 10
Dependent Claim
18 words
The water-continuous emulsion composition of claim 1 wherein the internal cure additive is a carboxylic acid functional hydrocarbon.
Claim 11
Dependent Claim
17 words
The water-continuous emulsion composition of claim 9 wherein the carboxylic acid functional hydrocarbon is a fatty acid.
Claim 12
Dependent Claim
34 words
The water-continuous emulsion composition of claim 9 wherein the carboxylic acid functional hydrocarbon is selected from lauric acid, palmitic acid, stearic acid, isostearic acid, tall oil acid, oleic acid, linoleic acid, and linolenic acid.
Claim 13
Dependent Claim
12 words
The water-continuous emulsion composition of claim 1 further comprising; (E) a plasticizer.
Claim 14
Dependent Claim
23 words
The water-continuous emulsion composition of claim 12 wherein (E) the plasticizer is a saturated or unsaturated hydrocarbon containing at least 8 carbon atoms.
Claim 15
Dependent Claim
36 words
The water-continuous emulsion composition of claim 12 wherein (E) the plasticizer is selected from mineral oil, carboxylic acid functional hydrocarbons containing at least 8 carbon atoms, and ester functional hydrocarbon containing at least 8 carbon atoms.
Claim 16
Dependent Claim
19 words
The water-continuous emulsion composition of claim 1 wherein the surfactant is a polyoxyalkylene alkyl ether or polyoxyalkylene alkylphenyl ether.
Claim 17
Dependent Claim
25 words
The water-continuous emulsion composition of claim 1 wherein the surfactant is a reaction product between a carboxylic acid functional hydrocarbon and an amine functional hydrocarbon.
Claim 18
Dependent Claim
30 words
The water-continuous emulsion composition of claim 16 wherein the carboxylic acid functional hydrocarbon is selected from a fatty acid and the amine functional hydrocarbon is selected from a hydrophilic amine.
Claim 19
Dependent Claim
23 words
The water-continuous emulsion composition of claim 17 wherein the fatty acid is isostearic acid and the hydrophilic amine is a secondary amine alcohol.
Claim 20
Dependent Claim
15 words
The water-continuous emulsion composition of claim 1 further comprising (F), a low molecular weight acid.
Claim 21
Dependent Claim
15 words
The water-continuous emulsion composition of claim 12 further comprising (F), a low molecular weight acid.
Claim 22
Dependent Claim
16 words
The water-continuous emulsion composition of claim 19 wherein the low molecular weight acid is acetic acid.
Claim 23
Dependent Claim
16 words
The water-continuous emulsion composition of claim 20 wherein the low molecular weight acid is acetic acid.
Claim 24
Dependent Claim
44 words
The water-continuous emulsion composition of claim 22 wherein the curable elastomeric polymer is a silylated copolymer of an isomonoolefin and a vinyl aromatic monomer, the surfactant is a polyoxyalkylene alkyl ether, the plasticizer is mineral oil, and the internal cure additive is isostearic acid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-04-13 | 2007-10-13 | 2008-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-04-13 | 2011-10-13 | 2012-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-04-13 | 2015-10-13 | 2016-04-13 | $7700.00 | Window Closed / Lapsed |