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US 12,252,606 B2Granted
Composites having a thermoplastic matrix
AssigneeEvonik Operations GmbH
InventorsJürgen Franosch, Andreas Szentivanyi, Hans Ries, Horst Beyer
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Abstract
The present invention is directed to continuous fiber-reinforced composites having a matrix of modified PVDF. The composite may be a semifinished product or a product or finished part manufactured therefrom. A product according to the invention is pelletized long-fiber material, while a finished part according to the invention is especially a thermoplastic composite pipe.
Claims21
A composite comprising:
- a polymer matrix and
- continuous fibers embedded therein,
- wherein the polymer matrix has a content of at least 80% by weight of a mixture comprising the following components:
- (a) low-viscosity polyvinylidene fluoride (PVDF) as the main component, present in a content of at least 50 parts by weight, and
- (b) from 1 to 50 parts by weight of an acrylate copolymer, wherein the acrylate copolymer contains from 1% to 30% by weight of units having carboxylic anhydride units,
- wherein the sum total of the parts by weight of a) and b) is 100,
- wherein the proportion by volume of the continuous fibers in the composite is from 10% to 80%, and
- wherein the low-viscosity polyvinylidene fluoride (PVDF) has a melt flow index of from 18 to 50 g/10 min.
5 more elements
Dependencies are inferred from the claim text.