EP0117738A2
Expired / Lapsed
EP
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Curable sheet
Assignee: Raychem Ltd
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Filing: 1984-02-24
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Granted: —
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Expires: 2004-02-24
Abstract
Abstract A curable sheet comprising first and second curing reactants arranged in discrete areas of the sheet, preferably by coextrusion, in patterns such as stripes and checks. The sheet cures upon fusion of the respective areas of the curing reactants.
Inventors
- 👤 Robert Hamilton Mcloughlin
- 👤 Pushpkumar Changani
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 17:10
CPC Classifications
B; B29; B29B; B29B11/00; B29B11/06; B29B11/10; B29B11/14; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/305; B29C48/36; B29C48/49; B29C49/00; B29C49/071; B29C61/00; B29C61/06; B29C61/0608; C; C08; C08J; C08J3/00; C08J3/24; C08J3/241; C09; C09J; C09J123/00; C09J123/02; C09J123/025; C09J5/00; C09J5/06; H; H01; H01R; H01R4/00; H01R4/70; H01R4/72; H02; H02G; H02G15/00; H02G15/013; B29C2949/00; B29C2949/07; B29C2949/0715; B29C48/08; B29C48/19; B29K; B29K2105/00; B29K2105/24; B29L; B29L2007/00; B29L2007/002; C08L; C08L2666/00; C08L2666/02; C08L2666/14; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1331; Y10T428/16; Y10T428/163; Y10T428/164; Y10T428/18; Y10T428/183; Y10T428/187; Y10T428/19; Y10T428/192; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2931; Y10T428/2973; Y10T428/2975; Y10T428/31504; Y10T428/31511
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
60 words
A curable sheet comprising a plurality of discrete regions of each of at least two mutually reactive polymeric components which components are fusion bonded to each other at least at the mutual edge interfaces of their respective sheet regions in an arrangement such that the said two components can be caused to react together to effect curing of the sheet.
Claim 2
Dependent Claim
60 words
A curable sheet comprising a plurality of discrete regions of each of at least two mutually reactive polymeric components which components are fusion bonded to each other at least at the mutual edge interfaces of their respective sheet regions in an arrangement such that the said two components can be caused to react together to effect curing of the sheet.
Claim 3
Dependent Claim
19 words
A sheet according to claim 1, wherein the said two components have been coextruded to form the respective regions.
Claim 4
Dependent Claim
41 words
A sheet according to claim 1 or 2 wherein the respective regions lie substantially parallel to one another and are interspersed with one another across the main surface of the sheet in a sense transverse to the direction of parallel lie.
Claim 5
Dependent Claim
43 words
A sheet according to claim 1, 2, or 3, wherein the respective regions are interspersed with one another in a first sense and in a second sense transverse to the first sense, both senses lying parallel with the main surfaces of the sheet.
Claim 6
Dependent Claim
39 words
A sheet according to any of the preceding claims, comprising at least two layers of the said regions, wherein the respective regions of each component in each layer are offset from the corresponding regions in the immediately adjacent layer(s).
Claim 7
Dependent Claim
21 words
A sheet according to claim 3, 4 or 5, wherein the respective regions of the two components alternate with each other.
Claim 8
Dependent Claim
40 words
A sheet as claimed in any of the preceding claims for use with a heat-recoverable article wherein each of the reactive components has a fusion temperature that is not more than 50 C° above the recovery temperature of the article.
Claim 9
Dependent Claim
28 words
A sheet as claimed in any of the preceding claims wherein each of the reactive components has a fusion temperature in the range of from 70 to 120°C.
Claim 10
Dependent Claim
38 words
A sheet as claimed in any of the preceding claims wherein each of the reactive components has a fusion temperature that differs from the fusion temperature of the or each other reactive component by not more than 30°C.
Claim 11
Dependent Claim
35 words
A sheet as claimed in any of the preceding claims which includes one or more non-reactive components and has a softening temperature range that is greater than the softening temperature range of the reactive components.
Claim 12
Dependent Claim
34 words
A sheet as claimed in any of the preceding claims 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 13
Dependent Claim
65 words
A sheet according to claim 11 which comprises regions of three reactive polymeric components, which components are (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.
Claim 14
Dependent Claim
38 words
A sheet according to any of the preceding claims, wherein at least one of the reactive components incorporates a polymeric binder and a low molecular weight or liquid reactive material capable of reacting with the other reactive component(s).
Claim 15
Dependent Claim
24 words
A dimensionally recoverable article having on at least part of a surface thereof a sheet as claimed in any one of the preceding claims.
Claim 16
Dependent Claim
27 words
An article as claimed in claim 14 which is in the form of a tube and carries the sheet on at least part of its inner surface.
Claim 17
Dependent Claim
28 words
An article as claimed in claim 14 which is in the form of a sheet and carries the curable sheet on at least part of one surface thereof.
Claim 18
Independent Claim
58 words
A method of enclosing at least part of a substrate, which comprises: (a) positioning thereon a dimensionally-recoverable article such that a sheet according to any of claims 1 to 13 is disposed between the article and substrate; and (b) recovering the article about the substrate and heating the sheet to fuse the said reactive components,thus curing the sheet.
Claim 19
Dependent Claim
21 words
A method as claimed in claim 17, wherein the article is as defined in any one of claims 14 to 16.
Claim 20
Independent Claim
25 words
A method of making a curable sheet according to any of claims 1 to 13, comprising coextruding the said two components to form the sheet.
Claim 21
Dependent Claim
50 words
A method according to claim 19, wherein an extruder having at least one row of extrusion holes is used to produce a striped arrangement of the said regions, some of the holes delivering one of the reactive components and others of the holes delivering the other(s) of the reactive components.
Claim 22
Dependent Claim
92 words
A method according to claim 19 wherein an extruder is used which has an extrusion head having extrusion holes and a movable gate with holes corresponding to the extrusion holes of the extruder head, the gate being movable to carry portions of the said components from the extrusion holes delivering those q components into alignment with the extrusion holes respectively delivering the other(s) of the said components; and wherein the gate is moved during extrusion so as to intersperse regions of the sheet respectively containing different components in the direction of extrusion.
References Cited (Backward Citations)
No citation records indexed.
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