EP0092336A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Adhesive compositions
Assignee: Dunlop Ltd
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Filing: 1983-04-05
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Granted: —
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Expires: 2003-04-05
Abstract
Abstract A method of making a one-part, spreadable, adhesive composition comprises (i) forming the reaction product at a room temperature below 130°C of an epoxy resin, a functional group-terminated butadiene/acrylonitrile copolymer elastomer, a chain extender and a catalyst for the reactions between the epoxy and functional groups, (ii) cooling the reaction product, and then (iii) combining the reaction product with a hardener, providing that in step (ii) the product is cooled to a temperature at which there will be substantially no reaction when combined with the hardener. The resulting adhesive composition has a reasonable storage life as it is substantially noncurable at room temperature, a temperature of at least 130 °C usually being required to convert it to an infusible state. In addition the adhesive composition is usually curable to a product having a high impact modulus i.e. a non-brittle product.
Inventors
- 👤 Winston James Peterson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 21:08
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/12; C09; C09J; C09J163/00; C08L; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
A method of making an adhesive composition from an epoxy resin, a functional group-terminated butadiene/acrylonitrile copolymer elastomer, a chain extender, a catalyst for the reactions between the epoxy and functional groups, and a hardener characterised in that in order to produce a one-part adhesive composition which is substantially stable and spreadable at 20°C the steps are as follows: (i) at a temperature below 130°C a reaction product is formed of the epoxy resin, functional group-terminated butadiene/ acrylonitrile copolymer elastomer, chain extender and catalyst for the reactions between the epoxy and functional groups, (ii) the reaction product is cooled to a temperature at which there will be substantially no reaction when combined with the hardener, and then (iii) the reaction product is combined with the hardener.
Claim 2
Independent Claim
125 words
A method of making an adhesive composition from an epoxy resin, a functional group-terminated butadiene/acrylonitrile copolymer elastomer, a chain extender, a catalyst for the reactions between the epoxy and functional groups, and a hardener characterised in that in order to produce a one-part adhesive composition which is substantially stable and spreadable at 20°C the steps are as follows: (i) at a temperature below 130°C a reaction product is formed of the epoxy resin, functional group-terminated butadiene/ acrylonitrile copolymer elastomer, chain extender and catalyst for the reactions between the epoxy and functional groups, (ii) the reaction product is cooled to a temperature at which there will be substantially no reaction when combined with the hardener, and then (iii) the reaction product is combined with the hardener.
Claim 3
Dependent Claim
31 words
A method according to Claim 1 characterised in that the reaction temperature of step (i) is from 110°C to 125 0 C and the reaction time is 45 minutes or less.
Claim 4
Dependent Claim
22 words
A method according to Claim 1 or 2 characterised in that the functional group-terminated butadiene/ _acrylonitrile copolymer comprises a carboxyl-tipped butadiene/acrylonitrile copolymer.
Claim 5
Dependent Claim
32 words
A method according to Claim 1, 2 or 3 characterised in that the functional group-terminated butadiene/acrylonitrile copolymer is liquid at 20°C and has an acrylonitrile content of 22 to 27% by weight.
Claim 6
Independent Claim
45 words
A method according to any preceding claim characterised in that the reaction product is formed by heating the epoxy resin and the chain extender to produce a homogeneous liquid and then combining this homogeneous liquid with the functional group-terminated butadiene/acrylonitrile copolymer elastomer and the catalyst.
Claim 7
Dependent Claim
29 words
A method according to Claim 5 characterised in that the temperature of the functional group-terminated butadiene/acrylonitrile copolymer elastomer when combined with the homogeneous liquid is 120 C or less.
Claim 8
Independent Claim
25 words
A method according to any preceding claim characterised in that the viscosity of the reaction product of step "(i)" is from 1400 to 3000 Ns/m2.
Claim 9
Independent Claim
25 words
A method according to any preceding claim characterised in that the epoxy equivalent of the reaction product of step "(i)" is from 300 to 500.
Claim 10
Dependent Claim
55 words
A one-part adhesive composition which is substantially stable and spreadable at 20°C characterised in that it comprises (i) the reaction product of an epoxy resin, a functional group-terminated butadiene/ acrylonitrile copolymer elastomer, a chain extender and a catalyst for the reaction between the epoxy and the functional groups, and (ii) a hardener for component (i).
Claim 11
Dependent Claim
55 words
A one-part adhesive composition which is substantially stable and spreadable at 20°C characterised in that it comprises (i) the reaction product of an epoxy resin, a functional group-terminated butadiene/ acrylonitrile copolymer elastomer, a chain extender and a catalyst for the reaction between the epoxy and the functional groups, and (ii) a hardener for component (i).
References Cited (Backward Citations)
No citation records indexed.
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