US 12,252,596 B2
Glass-reinforced fluoropolymer compositions
Ryan T. Tucker, Newtown Square, PA (US); and Katherine M. Sprick, Kennett Square, PA (US)
Assigned to AGC CHEMICALS AMERICAS, INC., Exton, PA (US)
Appl. No. 17/259,973
Filed by AGC CHEMICALS AMERICAS, INC., Exton, PA (US)
PCT Filed Jul. 22, 2019, PCT No. PCT/US2019/042761
§ 371(c)(1), (2) Date Jan. 13, 2021,
PCT Pub. No. WO2020/023347, PCT Pub. Date Jan. 30, 2020.
Claims priority of provisional application 62/701,952, filed on Jul. 23, 2018.
Prior Publication US 2021/0309813 A1, Oct. 7, 2021
Int. Cl. C08J 5/04 (2006.01); C08L 27/18 (2006.01)
CPC C08J 5/043 (2013.01) [C08L 27/18 (2013.01); C08L 2205/02 (2013.01)] 16 Claims
 
1. A glass-reinforced fluoropolymer composition having increased flexural strength and comprising:
A. a first fluoropolymer present in an amount of from 60 to 99 parts by weight per 100 parts by weight of said glass-reinforced fluoropolymer composition;
B. a second fluoropolymer defined as a carboxy- and/or anhydride-functionalized perfluoroalkoxy copolymer, wherein said second fluoropolymer is present in an amount of from 0.5 to 39.5 parts by weight per 100 parts by weight of said glass-reinforced fluoropolymer composition; and
C. glass fibers having a diameter of from 5 to 20 microns and a length of 5 to 100 microns, with said glass fibers present in an amount of from 0.5 to 39.5 parts by weight per 100 parts by weight of said glass-reinforced fluoropolymer composition;
wherein said glass fibers are milled fibers, and
wherein said carboxy- and/or anhydride-functionalized perfluoroalkoxy copolymer consists of units derived from:
(1) tetrafluoroethylene,
(2) a cyclic hydrocarbon monomer having a dicarboxylic anhydride group and a polymerizable unsaturated group, and
(3) a monomer selected from the group of:
(a) CF2═CFORf1, wherein Rf1 is a C1-10 perfluoroalkyl group which may contain an oxygen atom between carbon atoms,
(b) CF2═CFORf2SO2X1, wherein Rf2 is a C1-10 perfluoroalkylene group which may contain an oxygen atom between carbon atoms, and X1 is a halogen atom or a hydroxyl group,
(c) CF2═CFORf2CO2X2, wherein Rf2 is as defined above, and X2 is a hydrogen atom or a C1-3 alkyl group,
(d) CF2═CF(CF2)pOCF═CF2, wherein p is 1 or 2, and
(e) combinations thereof.