Polymer composition
AssigneeSynthomer (UK) Limited
InventorsJulija Ivanova, Natalie Blainey-Lang, Stacey Syron
Life of this patent
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Abstract
The present disclosure provides polyvinyl alcohol-based polymer compositions. One aspect provides a polymer composition comprising about 60 to about 99% by weight of a polymer (A), about 0.05 to about 10% by weight of a phosphite, at least one additive selected from vitamin E and epoxidised soy bean oil, and about 0 to about 10% by weight of a PEG-grafted polyvinyl acetate copolymer. Processes for preparation of said polymer composition as well as uses thereof and articles prepared therefrom are also provided.
Claims33
A thermally extrudable polymer composition comprising, based in each case on the total weight of said polymer composition:
- (a) about 60 to about 99% by weight of a polymer (A), wherein polymer (A) comprises, based in each case on the total number of moles of polymer (A):
- (i) from about 66 to about 79 mole % of structural units of formula (I):
- and
- (ii) from about 10 to about 34 mole % of structural units of formula (II):
- wherein each R1 is independently hydrogen or alkyl, each R2 is independently alkyl;
- and
- wherein the polymer (A) has a weight average molecular weight (Mw) of from about 26,000 to about 87,000 and a number average molecular weight (Mn) of from about 4,000 to about 45,000;
- (b) about 0.05 to about 10% by weight of a phosphite selected from the group consisting of formula (V):
- and formula (VI):
- wherein Ra, Rb, Rc, and Rd are each independently hydrocarbyl;
- (c) at least one additive selected from:
- (i) vitamin E;
- and
- (ii) epoxidised soy bean oil;
- and
- (d) about 0 to about 10% by weight of a PEG-grafted polyvinyl acetate copolymer, wherein the polyvinyl acetate copolymer has a degree of hydrolysis of from about 30 to about 98 mole %, a weight average molecular weight (Mw) of from about 5,000 to about 40,000, and a number average molecular weight (Mn) of from about 1,000 to about 20,000.
A thermally extrudable polymer composition comprising, based in each case on the total weight of said polymer composition:
- (a) about 60 to about 99% by weight of a polymer (A) which is a polyvinyl alcohol having a degree of hydrolysis of from about 66 to about 79%, wherein the polymer (A) has a weight average molecular weight (Mw) of from about 26,000 to about 87,000 and a number average molecular weight (Mn) of from about 4,000 to about 45,000;
- (b) about 0.05 to about 10% by weight of a phosphite selected from the group consisting of formula (V):
- and formula (VI):
- wherein Ra, Rb, Rc, and Rd are each independently hydrocarbyl;
- (c) at least one additive selected from:
- (i) vitamin E;
- and
- (ii) epoxidised soy bean oil;
- and
- (d) about 0 to about 10% by weight of a PEG-grafted polyvinyl acetate copolymer, wherein the polyvinyl acetate copolymer has a degree of hydrolysis of from about 30 to about 98 mole %, a weight average molecular weight (Mw) of from about 5,000 to about 40,000, and a number average molecular weight (Mn) of from about 1,000 to about 20,000.
Dependencies are inferred from the claim text.