US 12,071,494 B2
Vinylidene fluoride polymer dispersion
Serena Carella, Parabiago (IT); Mirko Mazzola, Milan (IT); Giulio Brinati, Milan (IT); Andrea Vittorio Oriani, Milan (IT); and Emanuele Di Nicolo', Gorla Minore (IT)
Assigned to SOLVAY SPECIALTY POLYMERS ITALY S.P.A., Bollate (IT)
Appl. No. 17/311,029
Filed by SOLVAY SPECIALTY POLYMERS ITALY S.P.A., Bollate (IT)
PCT Filed Dec. 2, 2019, PCT No. PCT/EP2019/083361
§ 371(c)(1), (2) Date Jun. 4, 2021,
PCT Pub. No. WO2020/126449, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 18214303 (EP), filed on Dec. 20, 2018.
Prior Publication US 2022/0025087 A1, Jan. 27, 2022
Int. Cl. C08F 214/22 (2006.01); C08F 220/06 (2006.01); C08L 27/16 (2006.01); H01M 4/62 (2006.01); H01M 50/42 (2021.01); H01M 50/426 (2021.01); H01M 50/449 (2021.01); H01M 50/403 (2021.01)
CPC C08F 214/22 (2013.01) [C08F 214/225 (2013.01); C08F 220/06 (2013.01); H01M 4/623 (2013.01); H01M 50/42 (2021.01); H01M 50/426 (2021.01); H01M 50/449 (2021.01); C08L 27/16 (2013.01); H01M 50/403 (2021.01)] 18 Claims
OG exemplary drawing
 
1. An aqueous dispersion [dispersion (D)] comprising particles of a vinylidene fluoride (VDF) polymer [polymer (A)] comprising recurring units derived from vinylidene fluoride (VDF) monomer, said polymer (A) comprising:
(i) more than 85.0% moles of recurring units derived from VDF, with respect to the total number of recurring units of polymer (A);
(ii) iodine-containing chain ends in an amount of 0.1 to 5.0 mmol/kg; and
(iii) a weight averaged molecular weight (Mw) of at least 500 KDalton, when measured by GPC, using N,N-dimethylacetamide (DMA) as solvent, against monodisperse polystyrene standards;
wherein the relation between melt viscosity (MV) in KPoise determined at a shear rate of 100 sec·1, and at a temperature of 230° C., according to ASTM D3835, and Mw, expressed in KDalton, satisfies the following inequality:
0.025×Mw (KDalton)+13≤MV (KPoise)≤0.050×Mw (KDalton)+10.