Back to results
US 2010/0305280 A1Published application
Pha blends
AssigneeMetabolix, Inc.
InventorRobert S. Whitehouse
Life of this patent
Estimating the term…
Abstract
This invention relates to blends containing two or more polyhydroxyalkanoates (PHAs), and related methods and articles.
Claims13
A blend comprising a first PHA and a second PHA,
- wherein:
- the first PHA is a copolymer consisting of a comonomer I-A and a comonomer I-B;
- the second PHA is a copolymer consisting of a comonomer 2-A and a comonomer 2-B;
- the first PHA copolymer and the second PHA copolymer are the same copolymer, in which the ratio of comonomer 1-A:comonomer I-B in the first PHA is different from the ratio of comonomer 2-A:comonomer 2-B in the second PHA;
- comonomer I-A and comonomer 2-A are both 3-hydroxybutyrate;
- the first PHA and the second PHA are miscible;
- and
- the first PHA has a first glass transition temperature and the second PHA has a second glass transition, wherein the difference between the first and second glass transition temperature is at least about 5° C.
5 more elements
An article comprising at least 1 percent by weight of a PHA blend comprising a first PHA and a second PHA,
- wherein:
- the first PHA is a copolymer consisting of a comonomer I-A and a comonomer I-B;
- the second PHA is a copolymer consisting of a comonomer 2-A and a comonomer 2-B;
- the first PHA copolymer and the second PHA copolymer are the same copolymer, in which the ratio of comonomer 1-A:comonomer I-B in the first PHA is different from the ratio of comonomer 2-A:comonomer 2-B in the second PHA;
- comonomer I-A and comonomer 2-A are both 3-hydroxybutyrate;
- the first PHA and the second PHA are miscible;
- and
- the first PHA has a first glass transition temperature and the second PHA has a second glass transition, wherein the difference between the first and second glass transition temperature is at least about 5° C.
5 more elements
A method of preparing a PHA blend comprising blending a first PHA with a second PHA;
- wherein:
- the first PHA is a copolymer consisting of a comonomer I-A and a comonomer I-B;
- the second PHA is a copolymer consisting of a comonomer 2-A and a comonomer 2-B;
- the first PHA copolymer and the second PHA copolymer are the same copolymer, in which the ratio of comonomer 1-A:comonomer I-B in the first PHA is different from the ratio of comonomer 2-A:comonomer 2-B in the second PHA;
- comonomer I-A and comonomer 2-A are both 3-hydroxybutyrate;
- the first PHA and the second PHA are miscible;
- and
- the first PHA has a first glass transition temperature and the second PHA has a second glass transition, wherein the difference between the first and second glass transition temperature is at least about 5° C.
5 more elements
Dependencies are inferred from the claim text.