Vinylidene fluoride polymers

Patent metadata

Field	Value
Publication number	US-10676549-B2
Application number	US-201515512245-A
Country	US
Kind code	B2
Filing date	Sep 8, 2015
Priority date	Sep 17, 2014
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

The present invention pertains to a process for manufacturing a vinylidene fluoride polymer, to a polymer obtainable via said process and to an article comprising the same.

First claim

The invention claimed is:

1. A process for manufacturing a vinylidene fluoride polymer, said process comprising polymerizing vinylidene fluoride (VDF) in aqueous suspension in the simultaneous presence of at least:
a) an alkylene oxide polymer (PAO); and
b) a polysaccharide derivative,
wherein the PAO has formula (I)
R A O—[(CH 2 ) m O] n —R B   (I)

wherein R A and R B are, independently from each other, H or a C 1 -C 5 linear or branched alkyl, m, equal to or different from each other at each occurrence, is an integer from 2 to 5, and n is an integer from 1000 to 200000.

2. The process of claim 1 , wherein the polysaccharide derivative has a dynamic viscosity of 1 to 30,000 mPa·s.

3. The process of claim 1 , wherein the polysaccharide derivative comprises recurring glycosidic units selected from D-glucopyranosides and glucofuranosides, or a mixture thereof, linked to each other by glycosidic bonds.

4. The process of claim 3 , wherein the polysaccharide derivative comprises recurring β-D-glucopyranoside units of formula (III) linked to each other by β-glycosidic bonds

wherein each R′, equal to or different from any other, represents a hydrogen atom, a C1-C8 hydrocarbon group or a C2-C8 hydroxyalkyl group.

5. The process of claim 4 , wherein each R′ in the carbohydrate derivative of formula (III), equal to or different from any other, represents a hydrogen atom, a methyl group, a hydroxyethyl group or a 2-hydroxypropylgroup.

6. The process of claim 5 , wherein the carbohydrate derivative of formula (III) is methylcellulose, hydroxyethyl methylcellulose or 2-hydroxypropyl methylcellulose.

7. The process of claim 6 , wherein the carbohydrate derivative is 2-hydroxypropyl methylcellulose having a methoxy degree of substitution of about 1.2 to 1.6 per mole and/or a hydroxypropyl degree of substitution of about 0.15 to 0.25 per mole.

8. The process of claim 1 , wherein the alkylene oxide polymer (PAO) is a polyethylene oxide having formula (II):
R A O—(CH 2 CH 2 O) n —R B   (II)

wherein R A and R B are, independently from each other, H or a C 1 -C 5 alkyl, n is an integer from 1000 to 200000.

9. The process of claim 1 , wherein the alkylene oxide polymer (PAO) is a polyethylene glycol having formula (IIb):
HO—(CH 2 CH 2 O) n —H  (IIb)

wherein n is an integer from 1000 to 200000.

10. The process of claim 1 , wherein the polymerization of vinylidene fluoride in aqueous suspension is carried out in the presence of 0.005 to 20 g of alkylene oxide polymer (PAO) per kg of vinylidene fluoride.

11. The process of claim 1 , wherein the polymerization of vinylidene fluoride in aqueous suspension is carried out in the presence of 0.0001 to 10 g of alkylene oxide polymer (PAO) per kg of vinylidene fluoride.

12. The process of claim 1 , wherein R A and R B are, independently from each other, H or CH 3 .

13. The process of claim 1 , wherein n is an integer from 5000 to 70000.

14. The process of claim 2 , wherein the polysaccharide derivative has a dynamic viscosity of about 120 to about 11,250 mPa·s.

15. The process of claim 1 , wherein:
the polysaccharide derivative comprises recurring glycosidic units selected from D-glucopyranosides and glucofuranosides, or a mixture thereof, linked to each other by glycosidic bonds; and
the alkylene oxide polymer (PAO) is a polyethylene oxide having formula (II):
R A O—(CH 2 CH 2 O) n —R B   (II)

wherein R A and R B are, independently from each other, H or a C 1 -C 5 alkyl, and n is an integer from 1000 to 200000.

16. The process of claim 3 , wherein:
the polysaccharide derivative comprises recurring β-D-glucopyranoside units of formula (III) linked to each other by β-glycosidic bonds

wherein each R′, equal to or different from any other, represents a hydrogen atom, a C1-C8 hydrocarbon group or a C2-C8 hydroxyalkyl group, and
the alkylene oxide polymer (PAO) is a polyethylene glycol having formula (IIb):
HO—(CH 2 CH 2 O) n —H  (IIb)

wherein n is an integer from 1000 to 200000.

17. The process of claim 16 , wherein n is an integer from 5000 to 70000.

Assignees

• Solvay Specialty Polymers It

Inventors

• Abusleme Julio A
• Brusseau Segolene

Classifications

• C08L1/284

  with hydroxylated hydrocarbon radicals · CPC title

• C08L1/00

  Compositions of cellulose, modified cellulose or cellulose derivatives · CPC title

• C08L1/26

  Cellulose ethers · CPC title

• C08L71/02

  Polyalkylene oxides · CPC title

• C08F114/22 Primary

  Vinylidene fluoride · CPC title