US6177519B1
Expired / Lapsed
US
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Silane grafted copolymers of an isomonoolefin and a vinyl aromatic monomer
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1999-03-02
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Granted: 2001-01-23
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Expires: 2019-03-02
Abstract
Abstract Curable silylated copolymers based on olefin copolymers comprising at least one C 4 to C 7 isomonoolefin and a vinyl aromatic monomer (alkyl styrene) are prepared by reacting the olefin copolymer with an olefinically unsaturated hydrolyzable silane in the presence of a free radical generating agent. The silylated copolymers are readily curable by contact with water (moisture) and a silanol condensation catalyst and are particularly useful as the polymeric component in sealant, caulking, adhesive and coating formulations.
Inventors
- 👤 David Yen-Lung Chung
- 👤 Hsien-Chang Wang
- 👤 Toshio Suzuki
- 👤 Raymond Lee Tabler
- 👤 Anil Kumar Saxena
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:54
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/08; C08F230/00; C08F230/04; C08F230/08; C08F230/085; C08F257/00; C08F257/02; C08F8/00; C08F8/42; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
83 words
A silylated copolymer which is the reaction product of: a) an olefin copolymer comprising at least 50 mole % of at least one C 4 to C 7 isomonoolefin and at least one 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 2
Dependent Claim
83 words
A silylated copolymer which is the reaction product of: a) an olefin copolymer comprising at least 50 mole % of at least one C 4 to C 7 isomonoolefin and at least one 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 3
Dependent Claim
26 words
The silylated copolymer of claim 1 wherein said olefin copolymer comprises at least 60 mole % of at least one C 4 to C 7 isomonoolefin.
Claim 4
Dependent Claim
14 words
The silylated copolymer of claim 1 wherein said vinyl aromatic monomer is an alkylstyrene.
Claim 5
Dependent Claim
12 words
The silylated copolymer of claim 3 wherein said alkyl styrene comprises para-methylstyrene.
Claim 6
Dependent Claim
25 words
The silylated copolymer of claim 3 comprising at least 80 mole % of isobutylene and from about 0.1 up to 20 mole % of para-alkylstyrene.
Claim 7
Dependent Claim
27 words
The silylated copolymer of claim 1 wherein said silane is a vinyl trialkoxy silane or methylvinyldialkoxy silane wherein the alkoxy group contains 1 to 4 carbon atoms.
Claim 8
Dependent Claim
16 words
The silylated copolymer of claim 1 wherein said free radical generating agent is an organic peroxide.
Claim 9
Dependent Claim
24 words
The silylated copolymer of claim 1 wherein said olefin copolymer has a number average molecular weight in the range of about 2,000 to 1,000,000.
Claim 10
Dependent Claim
25 words
The silylated copolymer of claim 8 wherein the number average molecular weight of said olefin copolymer is in the range of about 5,000 to 100,000.
Claim 11
Dependent Claim
25 words
The silylated copolymer of claim 9 wherein the number average molecular weight of said olefin copolymer is in the range of about 10,000 to 50,000.
Claim 12
Dependent Claim
32 words
The silylated copolymer of claim 1 wherein said olefin copolymer contains an average of from about 0.5 to about 15 moles of silyl groups per molecular chain, as measured by 'H NMR.
Claim 13
Dependent Claim
23 words
The silylated copolymer of claim 11 containing an average of from about 1 to about 5 moles of silyl groups per molecular chain.
Claim 14
Dependent Claim
101 words
A process for producing a silylated copolymer which comprises the steps of contacting: a) an olefin copolymer comprising at least 50 mole % of at least one C 4 to C 7 isomonoolefin and at least one vinyl aromatic monomer; and 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; said contact being made in the presence of a free radical generating agent at reaction conditions in a reaction zone.
Claim 15
Dependent Claim
101 words
A process for producing a silylated copolymer which comprises the steps of contacting: a) an olefin copolymer comprising at least 50 mole % of at least one C 4 to C 7 isomonoolefin and at least one vinyl aromatic monomer; and 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; said contact being made in the presence of a free radical generating agent at reaction conditions in a reaction zone.
Claim 16
Dependent Claim
13 words
The process of claim 13 wherein said vinyl aromatic monomer is an alkylstyrene.
Claim 17
Dependent Claim
27 words
The process of claim 14 wherein said olefin copolymer comprises at least 80 mole % isobutylene and from about 0.1 up to 20 mole % of para-alkylstyrene.
Claim 18
Dependent Claim
30 words
The process of claim 13 wherein said free radical generating agent is an organic peroxide, present at a molar ratio to said about 0.01:1 to silane of from about 0.1:1.
Claim 19
Dependent Claim
32 words
The process of claim 13 wherein said silane is present in the reaction mixture at a level of from about 0.05 to about 0.5 mmoles per gram of olefin copolymer plus silane.
Claim 20
Dependent Claim
27 words
The process of claim 13 wherein said contact step is conducted in the absence of a diluent and wherein said olefin copolymer is in the molten state.
Claim 21
Dependent Claim
17 words
The process of claim 13 wherein said contact step is conducted in the presence of a diluent.
Claim 22
Dependent Claim
44 words
The process of claim 13 wherein said silane is present in said reaction zone at a level such that said silylated copolymer contains an average of from about 0.5 to about 15 moles of silyl groups per molecular chain, as measured by 'H NMR.
Claim 23
Dependent Claim
23 words
A cured silylated copolymer of claim 1 prepared by contacting said silylated copolymer with water in the presence of a silanol condensation catalyst.
Claim 24
Dependent Claim
21 words
The process of claim 13 wherein the molecular weight of said olefin copolymer is reduced prior to contact with said silane.
Claim 25
Dependent Claim
18 words
The process of claim 22 wherein the molecular weight of said olefin copolymer is reduced using an extruder.
Claim 26
Dependent Claim
23 words
The process of claim 13 further comprising reducing the molecular weight of said silylated copolymer after contacting said olefin copolymer with said silane.
Claim 27
Dependent Claim
18 words
The process of claim 24 wherein the molecular weight of said silylated copolymer is reduced using an extruder.
Claim 28
Dependent Claim
17 words
The process of claim 13 wherein said olefin copolymer is contacted with said silane in an extruder.
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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) | 2004-01-23 | 2004-07-24 | 2005-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-01-23 | 2008-07-24 | 2009-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-01-23 | 2012-07-24 | 2013-01-23 | $7700.00 | Window Closed / Lapsed |