3-Hydroxybutyrate polymers
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0393407
(1982-06-29)
|
우선권정보 |
GB-0020991 (1981-07-07); GB-0013697 (1982-05-12) |
발명자
/ 주소 |
- Holmes Paul A. (Middlesbrough GB2) Collins Stephen H. (Thirsk GB2) Wright Leonard F. (Eaglescliffe GB2)
|
출원인 / 주소 |
- Imperial Chemical Industries PLC (London GB2 03)
|
인용정보 |
피인용 횟수 :
49 인용 특허 :
3 |
초록
▼
High molecular weight copolymers containing 3-hydroxybutyrate residue, i.e. units of the formula -O.CH(CH3).CH2.CO- and up to 50 mole % of residues of other hydroxy acids, viz units of the formula -O.CR1R2.(CR3R4)n.CO- where n is 0 or an integer and, if n=1 and R2, R3, and R4=H, R1 is not methyl. Th
High molecular weight copolymers containing 3-hydroxybutyrate residue, i.e. units of the formula -O.CH(CH3).CH2.CO- and up to 50 mole % of residues of other hydroxy acids, viz units of the formula -O.CR1R2.(CR3R4)n.CO- where n is 0 or an integer and, if n=1 and R2, R3, and R4=H, R1 is not methyl. The copolymers are made microbiologically: for part of the cultivation the micro-organism is under conditions such that polymer is accumulated, e.g. by limitation of a nutrient, e.g. nitrogen source, required for growth but not polyester accumulation. For at least part of this period of polymer accumulation the substrate is an acid or a derivative thereof that gives the comonomer units. Proprionic acid, which gives polymers where n=1, R2=R3=R4=H and R1=C2H5, is the preferred acid.
대표청구항
▼
Copolymers having a weight average molecular weight above 10,000 and containing repeat units -O.CH(CH3).CH2.CO-I and repeat units -O.CR1R2.(CR3R4)n.CO-II where n is 0 or an integer and R1, R2, R3, and R4 are each selected from hydrocarbon radicals: halo- and hydroxy-substituted hydrocarbon radicals;
Copolymers having a weight average molecular weight above 10,000 and containing repeat units -O.CH(CH3).CH2.CO-I and repeat units -O.CR1R2.(CR3R4)n.CO-II where n is 0 or an integer and R1, R2, R3, and R4 are each selected from hydrocarbon radicals: halo- and hydroxy-substituted hydrocarbon radicals; hydroxy radicals; halogen atoms; and hydrogen atoms, provided that, where n is 1 and R2, R3, and R4 are each hydrogen atoms, R1 is not methyl, said repeat units II constituting 0.1 to 50 mole % of the total repeat units in said copolymer.
이 특허에 인용된 특허 (3)
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Dhein Rolf (Krefeld DEX) Reuter Knud (Krefeld DEX) Rudolph Hans (Krefeld DEX) Pfitzner Jrg (Wuppertal DEX),
b
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