Biobased modifiers for polyvinylchloride blends
First Claim
1. A composition, comprising a polymer blend of:
- a polyvinyl chloride (PVC) polymer;
a primary plasticizer, optionally biobased; and
polyhydroxyalkanoate (PHA) composition comprising one or more biobased non-extractable nonvolatile plasticizing polyhydroxyalkanoate polymers,wherein the PHA composition decreases the migration rate of the primary plasticizer and improves performance of the polymer blend,where the PHA composition includes poly(3-hydroxybutyrate-co-4-hydroxybutyrate) copolymer, poly(3-hydroxybutyrate-co-5-hydroxyvalerate) copolymer;
or poly(3-hydroxybutyrate-co-6-hydroxyhexanoate) copolymer.
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Accused Products
Abstract
Compositions of polymer blends of polyvinylchloride (PVC), a low molecular weight plasticizer and polyhydroxyalkanoate (PHA) are described. In certain embodiments, the PHA is a poly-3-hydroxybutyrate-co-4-hydroxybutyrate copolymer having a weight percent 4-hydroxybutyrate of 30-45%. In other embodiments the PHA is a multiphase P3HB-4HB copolymer blend having one phase fully amorphous. The PHA is mixed with the PVC and low molecular weight plasticizer to optimize the PVC'"'"'s optical, thermal and mechanical properties. In certain embodiments, the polymer is branched with optionally additives that improve properties. Methods of making the compositions of the invention are also described. The invention also includes articles, films and laminates comprising the compositions.
15 Citations
17 Claims
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1. A composition, comprising a polymer blend of:
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a polyvinyl chloride (PVC) polymer; a primary plasticizer, optionally biobased; and polyhydroxyalkanoate (PHA) composition comprising one or more biobased non-extractable nonvolatile plasticizing polyhydroxyalkanoate polymers, wherein the PHA composition decreases the migration rate of the primary plasticizer and improves performance of the polymer blend, where the PHA composition includes poly(3-hydroxybutyrate-co-4-hydroxybutyrate) copolymer, poly(3-hydroxybutyrate-co-5-hydroxyvalerate) copolymer;
or poly(3-hydroxybutyrate-co-6-hydroxyhexanoate) copolymer. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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2. A composition, comprising a polymer blend of:
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a polyvinyl chloride (PVC) polymer; a primary plasticizer, optionally biobased; and polyhydroxyalkanoate (PHA) composition comprising one or more biobased non-extractable nonvolatile plasticizing polyhydroxyalkanoate polymers, wherein the PHA composition decreases the migration rate of the primary plasticizer and improves performance of polymer blend, wherein the PHA composition has a percent crystallinity of about 0.2 to 1% as measured by DSC.
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Specification