US5283309A
Expired / Lapsed
US
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Epoxy-containing organopolysiloxane and method for the preparation thereof
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1992-11-12
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Granted: 1994-02-01
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Expires: 2012-11-12
Abstract
Abstract An organopolysiloxane having monofunctional siloxane units (M unit) and tetrafunctional siloxane units (Q unit) and also having in the molecule an epoxy group-containing organic group, a polydiorganosiloxane residue bonded therein across a divalent hydrocarbon group, and optionally alkoxysilylalkyl is useful as an internal stress-relaxing agent, an internal mold-release, and as an adhesion promoter for curable organopolysiloxanes. These organopolysiloxanes are made by an addition reaction.
Inventors
- 👤 Yoshitsugu Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:34
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/48; C08G77/50; C08L101/00; C08G77/04; C08G77/12; C08G77/14; C08G77/18; C08G77/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
A composition comprising an organopoly-siloxane containing in each molecule at least one epoxy group-containing organic group and at least one polydiorganosiloxane residue where the organopolysiloxane has a general formula ##STR23## R 1 represents monovalent hydrocarbon groups exclusive of alkenyl groups; R 2 represents the hydrogen atom or monovalent hydrocarbon groups exclusive of alkenylgroups; R 3 is represents epoxy group-containing organic groups, polydiorganosiloxane residues as represented by the general formula ##STR24## in which R 1 represents monovalent hydrocarbon groups exclusive of alkenyl groups, R 4 represents divalent hydrocarbon groups, and n has a value of 1 to 500, and optionally alkoxysilylalkyl groups; a is zero or a positive number; b is a positive number; c is a positive number; a/c has a value of zero to 4; b/c has a value of 0.05 to 4; and (a+b)/c has a value of 0.2 to 4.
Claim 2
Dependent Claim
143 words
A composition comprising an organopoly-siloxane containing in each molecule at least one epoxy group-containing organic group and at least one polydiorganosiloxane residue where the organopolysiloxane has a general formula ##STR23## R 1 represents monovalent hydrocarbon groups exclusive of alkenyl groups; R 2 represents the hydrogen atom or monovalent hydrocarbon groups exclusive of alkenylgroups; R 3 is represents epoxy group-containing organic groups, polydiorganosiloxane residues as represented by the general formula ##STR24## in which R 1 represents monovalent hydrocarbon groups exclusive of alkenyl groups, R 4 represents divalent hydrocarbon groups, and n has a value of 1 to 500, and optionally alkoxysilylalkyl groups; a is zero or a positive number; b is a positive number; c is a positive number; a/c has a value of zero to 4; b/c has a value of 0.05 to 4; and (a+b)/c has a value of 0.2 to 4.
Claim 3
Dependent Claim
12 words
The composition according to claim 1 in which R 1 is methyl.
Claim 4
Dependent Claim
15 words
The composition according to claim 2 in which the organopolysiloxane has the following units ##STR25##
Claim 5
Dependent Claim
15 words
The composition according to claim 2 in which the organopolysiloxane has the following units ##STR26##
Claim 6
Dependent Claim
15 words
The composition according to claim 2 in which the organopolysiloxane has the following units ##STR27##
Claim 7
Dependent Claim
128 words
A method for the preparation of the organopolysiloxane of claim 1 comprising addition reacting, in the presence of (A) a hydrosilylation-reaction catalyst. (B) an SiH-containing organopolysiloxane with the general formula ##STR28## in which R 1 represents monovalent hydrocarbon groups exclusive of alkenyl groups, d is zero or a positive number, e is a positive number, f is a positive number, d/f has a value of zero to 4. e/f has a value of 0.05 to 4, and (d+e)/f has a value of 0.2 to 4. (C) epoxy-containing aliphatically unsaturated organic compound, (D) polydiorganosiloxane with the general formula ##STR29## in which R 1 represents monovalent hydrocarbon groups exclusive of alkenyl groups, R 5 represents alkenyl groups, and n has a value of 1 to 500, and optionally (E) alkoxysilylalkene.
References Cited (Backward Citations)
US3455877A
Cited
US2970150A
Cited
US3431143A
Cited
US3761444A
Cited
US4279717A
Cited
US4421904A
Cited
US4310678A
Cited
US4683278A
Cited
US4707531A
Cited
US4677161A
Cited
US4880882A
Cited
US4822687A
Cited
US4946921A
Cited
US5011901A
Cited
US5079311A
Cited
EP0458355A2
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-01-31 | 1997-08-02 | 1998-02-01 | $2000.00 | Window Closed / Lapsed |
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