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US 12,043,681 B2Granted
Highly flexible VDF polymer
AssigneeSolvay Specialty Polymers Italy S.P.A.
InventorJulio A. Abusleme
Life of this patent
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Abstract
The present invention pertains to vinylidene fluoride copolymers comprising recurring units derived from chlorotrifluoroethylene and from a (meth)acrylic monomer having improved flexibility, to a process for their manufacture, and to their use in applications where outstanding flexibility is required.
Claims15
A semi-crystalline vinylidene fluoride (VDF) copolymer [polymer (A)] comprising:
- (a) recurring units derived from vinylidene fluoride (VDF);
- (b) recurring units derived from chlorotrifluoroethylene (CTFE);
- (c) recurring units derived from at least one hydrophilic (meth)acrylic monomer (MA) of formula (I):
- wherein each of RI, R2, R3, equal or different from each other, is independently an hydrogen atom or a C1-C3 hydrocarbon group, and Rx is a hydrogen or a C1-C5 hydrocarbon moiety optionally comprising at least one functional group;
- and
- (d) recurring units derived from one or more fluorinated comonomers (F) different from vinylidene fluoride and from chlorotrifluoroethylene;
- wherein the total amount of recurring units b) is between 6% and 25% by weight with respect to the total weight of recurring units of polymer (A) and the total amount of recurring units d) is between 0.5% and 4% by weight with respect to the total weight of recurring units of polymer (A),
- wherein polymer (A) comprises a heat of fusion of at least 0.4 J/g, as measured according to ASTM D 3418 and has an intrinsic viscosity, measured at 25° ° C. in N,N-dimethylformamide of at least 0.05 l/g.
5 more elements
Dependencies are inferred from the claim text.