US4565853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions for forming epoxy adhesive containing acrylate rubber
Assignee: Akzo America Inc
•
Filing: 1983-01-19
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Granted: 1986-01-21
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Expires: 2003-01-19
Abstract
Abstract Reaction mixtures for forming curable epoxy resin compositions comprise an epoxy resin, a monoethylenically unsaturated monomer capable of forming polyacrylate rubber, a chain transfer agent to allow for higher levels of rubber in the curable epoxy resin without undesired viscosity increase and/or gellation, and a monomer soluble initiator. Optional ingredients include a crosslinking agent for the rubber-forming monomer, a grafting agent for rubber and epoxy resin, and an epoxy curing agent, preferably having activation conditions which are not satisfied when the initiator is activated. Heating the reaction mixture gives epoxy resin compositions containing polyacrylate rubber, the latter being optionally crosslinked and/or grafted to the epoxy resin. Activation of the curing agent, e.g., by heating, when such curing agent is present, yields cured adhesive compositions.
Inventors
- 👤 Eva J. Herscovici
- 👤 Ki-Soo Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:08
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
65 words
A reaction mixture, for forming a curable epoxy resin composition containing a polyacrylate rubber which comprises an epoxy resin, a monoethylenically unsaturated monomer capable of forming a polyacrylate rubber, an effective amount of a chain transfer agent for the unsaturated monomer to allow for an increased rubber content in the epoxy rubber composition, and a monomer soluble initiator for forming the rubber from the monomer.
Claim 2
Dependent Claim
65 words
A reaction mixture, for forming a curable epoxy resin composition containing a polyacrylate rubber which comprises an epoxy resin, a monoethylenically unsaturated monomer capable of forming a polyacrylate rubber, an effective amount of a chain transfer agent for the unsaturated monomer to allow for an increased rubber content in the epoxy rubber composition, and a monomer soluble initiator for forming the rubber from the monomer.
Claim 3
Dependent Claim
38 words
A mixture as claimed in claim 1 wherein the epoxy resin comprises from about 40% to about 99%, by weight of the composition and the monomer comprises from about 1% to about 60%, by weight of the mixture.
Claim 4
Dependent Claim
22 words
A mixture as claimed in claim 2 wherein the initiator comprises from about 0.01% to about 1%, by weight of the mixture.
Claim 5
Dependent Claim
17 words
A mixture as claimed in claim 1 which also contains a crosslinking agent for the rubber-forming monomer.
Claim 6
Dependent Claim
20 words
A mixture as claimed in claim 1 which also contains a grafting agent for the polyacrylate rubber and epoxy resin.
Claim 7
Dependent Claim
27 words
A mixture as claimed in claim 1 wherein the chain transfer agent is a compound substantially devoid of active hydrogen atoms that would cure the epoxy resin.
Claim 8
Dependent Claim
27 words
A mixture as claimed in claim 1 wherein the chain transfer agent is present at from about 0.001 to about 15% by weight of the rubber-forming monomer.
Claim 9
Dependent Claim
27 words
A mixture as claimed in claim 2 wherein the chain transfer agent is present at from about 0.1% to about 10% by weight of the rubber-forming monomer.
Claim 10
Dependent Claim
28 words
A mixture as claimed in claim 1 wherein the chain transfer agent is selected from the group consisting of hydrocarbon, halogenated, nitrogen, sulfur and organometallic chain transfer agents.
Claim 11
Dependent Claim
17 words
A mixture as claimed in claim 8 wherein the chain transfer agent is a halogenated aliphatic compound.
Claim 12
Dependent Claim
12 words
A polyacrylate-modified epoxy resin composition formed from the mixture of claim 1.
Claim 13
Dependent Claim
12 words
A polyacrylate-modified epoxy resin composition formed from the mixture of claim 3.
Claim 14
Dependent Claim
12 words
A polyacrylate-modified epoxy resin composition formed from the mixture of claim 8.
Claim 15
Dependent Claim
12 words
A cured epoxy resin adhesive formed from the composition of claim 11.
Claim 16
Dependent Claim
12 words
A cured epoxy resin adhesive formed from the composition of claim 12.
Claim 17
Dependent Claim
12 words
A cured epoxy resin adhesive formed from the composition of claim 13.
References Cited (Backward Citations)
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US4129670A
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JPS5241663A
Cited
US4051193A
Cited
US4146452A
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US4308185A
Cited
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GB2068001A
Cited
JPS57236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |