US4517340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive composition
Assignee: Raychem Ltd
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Filing: 1984-07-12
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Granted: 1985-05-14
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Expires: 2004-07-12
Abstract
Abstract An adhesive composition comprises (a) a thermoplastic polyamide having reactive amine groups; (b) a thermoplastic copolymer of an alkene with an ethylenically unsaturated ester of an alkanol and a carboxylic acid, e.g. vinyl acetate or ethyl acrylate, and optionally one or more acidic copolymers; and (c) a thermoplastic epoxy resin. The components (a) and (b) are present in a ratio of from 35:65 to 75:25 by weight and component (c) is present in an amount of from about 8 to 79 parts per hundred parts of components (a) and (b) by weight, components (a), (b) and (c) existing separately in the form of particles that are mixed together.
Inventors
- 👤 Michael R. Read
- 👤 Nicholas T. Corke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:56
CPC Classifications
C; C09; C09J; C09J163/00; C09J123/00; C09J123/02; C09J123/025; C09J177/00; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
132 words
A dimensionally-recoverable article having on at least part of a surface thereof an adhesive composition which comprises: (a) a thermoplastic polyamide having reactive amine groups; (b) a thermoplastic copolymer of an alkene with an ethylenically unsaturated ester of an alkanol and a carboxylic acid, the ester having up to 6 carbon atoms, and optionally one or more acidic comonomers, said copolymer having an acid number of at least 1; (c) an epoxy resin; components (a) and (b) being present in a ratio of from 35:65 to 75:25 by weight and component (c) being present in an amount of from 8 to 79 parts per hundred parts of components (a) and (b) by weight, components (a), (b) and (c) existing separately from one another in the form of particles that are mixed together.
Claim 2
Dependent Claim
132 words
A dimensionally-recoverable article having on at least part of a surface thereof an adhesive composition which comprises: (a) a thermoplastic polyamide having reactive amine groups; (b) a thermoplastic copolymer of an alkene with an ethylenically unsaturated ester of an alkanol and a carboxylic acid, the ester having up to 6 carbon atoms, and optionally one or more acidic comonomers, said copolymer having an acid number of at least 1; (c) an epoxy resin; components (a) and (b) being present in a ratio of from 35:65 to 75:25 by weight and component (c) being present in an amount of from 8 to 79 parts per hundred parts of components (a) and (b) by weight, components (a), (b) and (c) existing separately from one another in the form of particles that are mixed together.
Claim 3
Dependent Claim
19 words
A composition as claimed in claim 1 wherein component (b) has an acid number of less than about 100.
Claim 4
Dependent Claim
21 words
A composition as claimed in claim 1, wherein the ethylenically unsaturated ester of component (b) is vinyl acetate or ethyl acrylate.
Claim 5
Dependent Claim
21 words
A composition as claimed in claim 1, wherein the alkene of component (b) is a C 2 to C 4 alkene.
Claim 6
Dependent Claim
15 words
A composition as claimed in claim 4, wherein the alkene of component (b) is ethylene.
Claim 7
Dependent Claim
25 words
A composition as claimed in claim 1, wherein components (a) and (b) are present in a ratio of from about 35:65 to 65:30 by weight.
Claim 8
Dependent Claim
25 words
A composition as claimed in claim 6, wherein components (a) and (b) are present in a ratio of from about 4:6 to 6:4 by weight.
Claim 9
Dependent Claim
25 words
A composition as claimed in claim 7, wherein components (a) and (b) are present in a ratio of from about 45:55 to 55:45 by weight.
Claim 10
Dependent Claim
30 words
A composition as claimed in claim 1, wherein each of components (a), (b) and (c) has a melting or softening point in the range of from 60° to 120° C.
References Cited (Backward Citations)
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GB1370782A
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DE2226399A1
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US4018733A
Cited
US4122128A
Cited
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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) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |