PHA blends
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0783995
(2004-02-20)
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등록번호 |
US-7781539
(2010-09-13)
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발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
4 인용 특허 :
63 |
초록
This invention relates to blends containing two or more polyhydroxyalkanoates (PHAs), and related methods and articles.
대표청구항
▼
What is claimed is: 1. 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
What is claimed is: 1. 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; and the first PHA and the second PHA are miscible. 2. The blend of claim 1, wherein comonomer I-B and comonomer 2-B both are 3-hydroxypropionate, 4-hydroxybutyrate, 3-hydroxyhexanoate, or 3-hydroxyoctanoate, 3-hydroxypropionate, 6-hydroxyhexanoate, 3-hydroxydecanoate, 3-hydroxydodecanoate, or 3-hydroxydodecenoate. 3. The blend of claim 2, wherein comonomer I-B and comonomer 2-B both are 4-hydroxybutyrate. 4. The blend of claim 1 additionally comprising a third PHA. 5. The blend of claim 1, wherein when the first PHA and the second PHA are blended and the blend is molded, the blend has a deformation angle tolerance of at least about 5°. 6. The blend of claim 1, wherein when the first PHA and the second PHA are blended and the blend is molded, the blend has a thermal deformation resistance temperature of at least 80° C. 7. The blend of claim 1, wherein 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 1° C. 8. 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; and the first PHA and the second PHA are miscible. 9. The method of claim 8, wherein the blending is by solvent blending, emulsion blending or melt blending. 10. The method of claim 8, wherein the blending is by solvent blending. 11. The method of claim 10, wherein the solvent blending comprises: (i) dissolving the first PHA and the second PHA in a solvent or solvent mixture; or dissolving the first PHA and the second PHA separately in a solvent or solvent mixture and combining; to form a blended PHA solution containing at most about 50 weight percent of the first PHA and the second PHA; (ii) applying the PHA solution to a surface to form a PHA blend solution layer on the surface; and (iii) removing some or all of the solvent to form a PHA blend layer on the surface. 12. An article comprising at least about 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; and the first PHA and the second PHA are miscible. 13. A method of making an article comprising: molding a PHA blend prepared by a method comprising: blending a first PHA with a second PHA comprising; (i) dissolving the first PHA and the second PHA in a solvent or solvent mixture; or dissolving the first PHA and the second PHA separately in a solvent or solvent mixture; and combining to form a blended PHA solution containing at most about 50 weight percent of the first PHA and the second PHA; (ii) applying the PHA solution to a surface to form a PHA blend solution layer on the surface; and (iii) removing some or all of the solvent to form a PHA blend layer on the surface; 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; and the first PHA and the second PHA are miscible. 14. A blend comprising a first PHA and a second PHA, wherein: the first PHA is a poly(3-hydroxybutyrate) homopolymer; the second PHA is a copolymer having a first and a second comonomer; the first co-monomer is 3-hydroxybutyrate; the second comonomer is 4-hydroxybutyrate; and the first PHA and the second PHA are miscible. 15. The blend of claim 14, wherein the copolymer has at most about 3 weight percent, or at most about 15 weight percent of one comonomer. 16. The blend of claim 14, wherein the blend comprises poly 3-hydroxybutyrate blended with poly 3-hydroxybutyrate-co-11 wt %-4-hydroxybutyrate; or poly 3-hydroxybutyrate blended with poly 3-hydroxybutyrate-co-33 wt %-4-hydroxybutyrate. 17. The blend of claim 16, wherein the blend comprises at most about 20 wt % poly 3-hydroxybutyrate. 18. The blend of claim 16, wherein the blend comprises at most about 60 wt % poly 3-hydroxybutyrate. 19. The blend of claim 14 additionally comprising a third PHA. 20. The blend of claim 14, wherein when the first PHA and the second PHA are blended and the blend is molded, the blend has a deformation angle tolerance of at least about 5°. 21. The blend of claim 14, wherein the first PHA and the second PHA are blended and the blend is molded, the blend has a thermal deformation resistance temperature of at least 80° C. 22. A method of preparing a PHA blend comprising blending a first PHA with a second PHA wherein: the PHA blend comprises the first PHA and the second PHA; the first PHA is a poly(3-hydroxybutyrate) homopolymer; the second PHA is a copolymer having a first and a second comonomer; wherein the first co-monomer is 3-hydroxybutyrate and the second comonomer is 4-hydroxybutyrate; and the first PHA and the second PHA are miscible. 23. The method of claim 22, wherein the blending of the first PHS, and the second PHA is by solvent blending, emulsion blending or melt blending. 24. The method of claim 22, wherein the blending is by solvent blending. 25. The method of claim 22, wherein the blending comprises: (i) dissolving the first PHA and the second PHA in a solvent or solvent mixture; or dissolving the first PHA and the second PHA separately in a solvent or solvent mixture; and combining to form a blended PHA solution containing at most about 50 weight percent of the first PHA and the second PHA; (ii) applying the PHA solution to a surface to form a PHA blend solution layer on the surface; and (iii) removing some or all of the solvent to form a PHA blend layer on the surface. 26. An article comprising at least about 1 percent by weight of a PHA blend comprising a first PHA and a second PHA, wherein: the first PHA is a poly(3-hydroxybutyrate) homopolymer; the second PHA is a copolymer having a first and a second comonomer; wherein the first co-monomer is 3-hydroxybutyrate and the second co-monomer is 4-hydroxybutyrate; and the first PHA and the second PHA are miscible. 27. A method of making an article comprising: molding a PHA blend prepared by a method comprising: blending a first PHA with a second PHA comprising: (i) dissolving the first PHA and the second PHA in a solvent or solvent mixture; or dissolving the first PHA and the second PHA separately in a solvent or solvent mixture; and combining to form a blended PHA solution containing at most about 50 weight percent of the first PHA and the second PHA; (ii) applying the PHA solution to a surface to form a PHA blend solution layer on the surface; and (iii) removing some or all of the solvent to form a PHA blend layer on the surface; wherein: the PHA blend comprises the first PHA and the second PHA; the first PHA is a poly(3-hydroxybutyrate) homopolymer; the second PHA is a copolymer having a first and a second comonomer; wherein the first co-monomer is 3-hydroxybutyrate and the second comonomer is 4-hydroxybutyrate; and the first PHA and the second PHA are miscible.
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