EP0288908A2
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EP
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Process for production of a random copolymer comprising D-(-)-3-hydroxybutyrate units and D-(-)-3-hydroxyvalerate
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1988-04-21
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Granted: —
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Expires: 2008-04-21
Abstract
Abstract A random copolymer comprising less than 50 mole% of D-(-)-3-hydroxybutyrate units and more than 50 mole% of D-(-)-3-hydroxyvalerate units, the percentages being based on the total amount of the two units. A process for producing the random copolymer which comprises (1) cultivating a microorganism having the ability to produce poly(3-hydroxybutyrate) to grow and proliferate the cells of the microorganism, (2) cultivating the cells in the presence of a valeric acid or in the copresence of a valeric acid and an n-butyric acid while limiting the amount of nitrogen or phosphorus to produce and accumulate a random copolymer comprising D-(-)-3-hydroxybutyrate units and D-(-)-3-hydroxyvalerate units within the cells, and thereafter, (3) recovering the copolymer from the cells.
Inventors
- 👤 Yoshiharu Doi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 23:52
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/62; C12P7/625; C08; C08G; C08G63/00; C08G63/02; C08G63/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
33 words
A random copolymer comprising less than 50 mole % of D-(-)-3-hydroxybutyrate units and more than 50 mole % of D-(-)-3-hydroxyvalerate units, the percentages being based on the total amount of the two units.
Claim 2
Dependent Claim
33 words
A random copolymer comprising less than 50 mole % of D-(-)-3-hydroxybutyrate units and more than 50 mole % of D-(-)-3-hydroxyvalerate units, the percentages being based on the total amount of the two units.
Claim 3
Dependent Claim
15 words
The random copolymer of claim 1 which consists essentially of D-(-)-3-hydroxybutyrate units and D-(-)-3-hydroxyvalerate units.
Claim 4
Dependent Claim
25 words
The random copolymer of claim 1 which has an intrinsic viscosity [η], measured in its solution in chloroform at 30°C, of 0.1 to 10 dl/g.
Claim 5
Dependent Claim
72 words
A process for producing a random copolymer which comprises (1) cultivating a microorganism having the ability to produce poly(3-hydroxybutyrate) to grow and proliferate the cells of the microorganism, (2) cultivating the cells in the presence of a valeric acid while limiting the amount of nitrogen or phosphorus to produce and accumulate a random copolymer comprising D-(-)-3-hydroxybutyrate units and D-(-)-3-hydroxyvalerate units within the cells, and thereafter, (3) recovering the copolymer from the cells.
Claim 6
Dependent Claim
72 words
A process for producing a random copolymer which comprises (1) cultivating a microorganism having the ability to produce poly(3-hydroxybutyrate) to grow and proliferate the cells of the microorganism, (2) cultivating the cells in the presence of a valeric acid while limiting the amount of nitrogen or phosphorus to produce and accumulate a random copolymer comprising D-(-)-3-hydroxybutyrate units and D-(-)-3-hydroxyvalerate units within the cells, and thereafter, (3) recovering the copolymer from the cells.
Claim 7
Dependent Claim
49 words
The process of claim 4 wherein the valeric acid is a compound of the formula CH₂XCHYCH₂CH₂COOH in which X represents a hydrogen atom, a halogen atom or a hydroxyl group, and Y represents a hydrogen atom, a halogen atom, a hydroxyl group or an alkyl group, or its salt.
Claim 8
Dependent Claim
76 words
A process for producing a random copolymer which comprises (1) cultivating a microorganism having the ability to produce poly(3-hydroxybutyrate) to grow and proliferate the cells of the microorganism, (2) cultivating the cells in the copresence of a valeric acid and an n-butyric acid while limiting the amount of nitrogen or phosphorus to produce and accumulate a random copolymer comprising D-(-)-3-hydroxybutyrate units and D-(-)-3-hydroxyvalerate units within the cells, and thereafter, (3) recovering the copolymer from the cells.
Claim 9
Dependent Claim
76 words
A process for producing a random copolymer which comprises (1) cultivating a microorganism having the ability to produce poly(3-hydroxybutyrate) to grow and proliferate the cells of the microorganism, (2) cultivating the cells in the copresence of a valeric acid and an n-butyric acid while limiting the amount of nitrogen or phosphorus to produce and accumulate a random copolymer comprising D-(-)-3-hydroxybutyrate units and D-(-)-3-hydroxyvalerate units within the cells, and thereafter, (3) recovering the copolymer from the cells.
Claim 10
Dependent Claim
49 words
The process of claim 6 wherein the valeric acid is a compound of the formula CH₂XCHYCH₂CH₂COOH in which X represents a hydrogen atom, a halogen atom or a hydroxyl group, and Y represents a hydrogen atom, a halogen atom, a hydroxyl group or an alkyl group, or its salt.
Claim 11
Dependent Claim
32 words
The process of claim 6 wherein the n-butyric acid is a compound represented by the CH₂X¹CH₂CH₂COOH wherein X¹ represents a hydrogen atom, a halogen atom or a hydroxyl group, or its salt.
References Cited (Backward Citations)
No citation records indexed.
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