Random copolymer comprising d-(-)-3-hydroxybutyrate units...

Details Random copolymer comprising d-(-)-3-hydroxybutyrate units... Random copolymer comprising d-(-)-3-hydroxybutyrate units...

C - Chemistry, Metallurgy

12

P

402/314, 195/86

C12P 7/62 (2006.01) C08G 63/06 (2006.01)

Patent

CA 1338142

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 accumu- late a random copolymer comprising D-(-)-3-hydroxy- butyrate units and D-(-)-3-hydroxyvalerate units within the cells, and thereafter, (3) recovering the copolymer from the cells.

564973

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