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US 5,512,225 AGranted
Method of increasing interlayer adhesion of multi-layer compositions having a fluoroplastic layer
AssigneeMinnesota Mining and Manufacturing Company
InventorTatsuo Fukushi
Life of this patent
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Abstract
A method for increasing the adhesion of a first layer comprising fluoroplastic to a second layer containing a peroxide-curable hydrocarbon elastomer is disclosed. The method involves adding a primary-amine containing unsaturated compound or polymer of less than 10,000 molecular weight to the hydrocarbon elastomer layer.
Claims17
A method for increasing the adhesion of a first layer comprising fluoroplastic to a second layer comprising peroxide-curable hydrocarbon elastomer having a number-average molecular weight of at least 50,000, comprising the steps of:
- (A) adding a primary-amine containing unsaturated compound or polymer, having a number-average molecular weight of less than 10,000, to a composition comprising said hydrocarbon elastomer;
- (B) forming a multi-layer article comprising a layer comprising the mixture resulting from step A and a layer comprising said fluoroplastic;
- wherein said two layers are in superimposed one on another, said fluoroplastic comprises interpolymerized units derived from vinylidene fluoride, and said primary-amine containing compound or polymer is present in an amount sufficient to increase the adhesion between the two layers compared to compositions without said primary-amine containing compound or polymer.
Dependencies are inferred from the claim text.