Multilayer composites coextruded with the use of impact-reinforced impervious resin compositions and their use for the manufacture of fuel storage vessels
First Claim
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1. A coextruded multilayer composite, comprising:
- a layer of a polyolefin;
a layer of an impact-reinforced impervious resin composition consisting essentially of a hydrolyzed copolymer of vinyl acetate and ethylene, and an elastomeric copolymer of ethylene and propylene which is modified by grafting an α
,β
-ethylenically unsaturated carboxylic acid as an additive in an amount effective for improving impact strength; and
an intermediate layer of a polymeric adhesive bonding together the layer of a polyolefin and the layer of an impact-reinforced impervious resin composition.
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Abstract
Multilayer composites coextruded with the use of polyolefins and of impact-reinforced impervious resin compositions based on hydrolysed copolymers of vinyl acetate and ethylene comprising, as an additive improving the impact strength, elastomeric copolymers of ethylene and propylene which are modified by grafting an α,β-ethylenically unsaturated carboxylic acid and, preferably, by maleic anhydride.
The coextruded multilayer composites are very particularly suitable for the manufacture of fuel storage vessels combining impact strength and high imperviousness to petrol and to petrol/alcohol mixtures.
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Citations
10 Claims
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1. A coextruded multilayer composite, comprising:
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a layer of a polyolefin; a layer of an impact-reinforced impervious resin composition consisting essentially of a hydrolyzed copolymer of vinyl acetate and ethylene, and an elastomeric copolymer of ethylene and propylene which is modified by grafting an α
,β
-ethylenically unsaturated carboxylic acid as an additive in an amount effective for improving impact strength; andan intermediate layer of a polymeric adhesive bonding together the layer of a polyolefin and the layer of an impact-reinforced impervious resin composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification