Patent EP0074218A1 successfully refreshed from Google Patents.
EP0074218A1
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EP
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Heat recoverable article
Assignee: Raychem Ltd
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Filing: 1982-08-25
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Granted: —
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Expires: 2002-08-25
Abstract
Abstract A dimensionally recoverable article, preferably a heat-recoverable article, has on at least part of a surface thereof an adhesive composition that will cure by reaction of a plurality of mutually reactive components. The components are in the form of particles which are mixed together and which will fuse when heated. Preferred adhesives are based on combinations of an epoxy with a polyamide, carboxylic acid, phenolic resin or blocked isocyanate curing agent. The particulate adhesives show a synergistic increase in rate and/or level of cure when used in conjunction with a recoverable article.
Inventors
- 👤 George Barry Park
- 👤 David John Barker
- 👤 Michael Rosser Read
- 👤 Nicholas Thomas Corke
- 👤 Kenneth Brian Pithouse
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 10:06
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/16; B; B29; B29C; B29C61/00; B29C61/06; B29C61/0608; B29C61/0616; C; C08; C08L; C08L77/00; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J163/00; C09J177/00; C09J179/00; C09J179/04; C09J179/08; C09J5/00; C09J5/06; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/35; C08L2666/00; C08L2666/02; C08L2666/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
53 words
. 1. A dimensionally recoverable article having, on at least part of a surface thereof, an adhesive composition that will cure by reaction of a plurality of mutually reactive components, the components existing separately from one another in the form of solid particles which are mixed together and which will fuse when heated.
Claim 2
Dependent Claim
11 words
An article as claimed in claim 1 which is dimensionally heat-recoverable.
Claim 3
Dependent Claim
42 words
An article as claimed in claim 2, wherein each of the reactive components has a fusion temperature that is not more than 50°C above the recovery temperature of the article, preferably not more than 10°C above the recovery temperature of the article.
Claim 4
Dependent Claim
26 words
An article as claimed in any one of claims 1 to 3, wherein each of the reactive components has a fusion temperature of at least 50°C.
Claim 5
Dependent Claim
30 words
An article as claimed in any one of claims 1 to 4, wherein each of the reactive components has a fusion temperature in the range of from 70 to 120°C.
Claim 6
Dependent Claim
32 words
An article as claimed in any one of claims 1 to 5, wherein the particles have a weight average particle size of not more than 1000, preferably not more than 300 micrometres.
Claim 7
Dependent Claim
36 words
An article as claimed in any one of claims 1 to 6, wherein one of the reactive components comprises an epoxy resin and the other reactive component comprises a thermoplastic polyamide resin having free amine groups.
Claim 8
Independent Claim
78 words
A method of enclosing at least part of a substrate, which comprises: (a) positioning thereon a dimensionally-recoverable article such that an adhesive composition is disposed between the article and substrate, the adhesive composition comprising a plurality of mutually reactive components that exist separately from one another in the form of solid particles which are mixed together and which will fuse when heated; and (b) recovering the article about the substrate and heating the adhesive to fuse the particles.
Claim 9
Dependent Claim
112 words
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; and (c) a thermoplastic 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 10
Dependent Claim
18 words
An adhesive as claimed in claim 9, wherein component (b) has an acid number of less than 100.
Claim 11
Dependent Claim
24 words
An adhesive as claimed in claim 9 or claim 10, wherein the ethylenically unsaturated ester of component (b) is vinyl acetate or ethyl acrylate.
Claim 12
Dependent Claim
20 words
An adhesive as claimed in any one of claims 9 to 11, wherein the alkene of component (b) is ethylene.
Claim 13
Dependent Claim
29 words
An adhesive as claimed in any one of claims 9 to 12, wherein components (a) and (b) are present in a ratio of from 4:6 to 6:4 by weight.
Claim 14
Dependent Claim
31 words
An adhesive as claimed in any one of claims 9 to 13, wherein components (a), (b) and (c) each has a melting point in the range of from 60 to 120°C.
Claim 15
Dependent Claim
25 words
A dimensionally recoverable article having on at least part of a surface thereof an adhesive as claimed in any one of claims 9 to 14.
References Cited (Backward Citations)
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