GB2272904A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Solvent based enzymatic synthesis
Assignee: Lanxess Urethanes UK Ltd
•
Filing: 1993-11-30
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Granted: —
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Expires: 2013-11-30
Abstract
Abstract A process for producing a polyester comprising residues of (i) at least one aliphatic dicarboxylic acid and at least one aliphatic diol or polyol or (ii) at least one aliphatic hydroxyacid comprises reacting the diacid and the diol or polyol or the hydroxyacid in the presence of a lipase and an organic solvent. Preferably the dicarboxylic acid is adipic acid and the diol is 1,4-butanediol. The hydroxyacid may have from 2 to 12 carbon atoms.
Inventors
- 👤 Falmai Binns
- 👤 Alan Taylor
- 👤 Stanley Michael Roberts
- 👤 Charles Francis Williams
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 12:46
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/62; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4236; C08G18/4266; C08G18/4283; C08G63/00; C08G63/02; C08G63/60; C08G63/78; C08G63/82; C12P7/625
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
55 words
A process for producing a polyester comprising residues of (i) at least one aliphatic dicarboxylic acid and at least one aliphatic diol or polyol or (ii) at least one aliphatic hydroxyacid which process comprises reacting the diacid and the diol or polyol or the hydroxyacid in the presence of a lipase and an organic solvent.
Claim 2
Dependent Claim
55 words
A process for producing a polyester comprising residues of (i) at least one aliphatic dicarboxylic acid and at least one aliphatic diol or polyol or (ii) at least one aliphatic hydroxyacid which process comprises reacting the diacid and the diol or polyol or the hydroxyacid in the presence of a lipase and an organic solvent.
Claim 3
Dependent Claim
17 words
A process according to claim 1 wherein the dicarboxylic acid has from 2 to 12 carbon atoms.
Claim 4
Dependent Claim
13 words
A process according to claim 2 wherein the dicarboxylic acid is adipic acid.
Claim 5
Dependent Claim
20 words
A process according to any one of the preceding claims wherein the diol has from 2 to 12 carbon atoms.
Claim 6
Dependent Claim
12 words
A process according to claim 4 wherein the diol is 1,4 butanediol.
Claim 7
Dependent Claim
33 words
A process according to any one of the preceding claims wherein the reactive carboxylic acid groups and reactive hydroxyl groups of the reactants are present in a molar ratio of 1:1 to 1:1.1.
Claim 8
Dependent Claim
37 words
A process according to any one of the preceding claims which comprises reacting a diacid, a diol or polyol and a hydroxyacid in the presence of a lipase and in the presence of a polar organic solvent.
Claim 9
Dependent Claim
20 words
A process according to any one of the preceding claims wherein the hydroxyacid has from 2 to 12 carbon atoms.
Claim 10
Dependent Claim
18 words
A process according to any one of the preceding claims wherein the lipase is derived from Mucor miehei.
Claim 11
Dependent Claim
12 words
A process according to claim 9 wherein the lipase is Lipozyme IM-20.
Claim 12
Dependent Claim
27 words
A process according to any one of the preceding claims wherein the solvent is a straight or branched alkyl ether having from 4 to 12 carbon atoms.
Claim 13
Dependent Claim
12 words
A process according to claim 11 wherein the ether is isopropyl ether.
Claim 14
Dependent Claim
22 words
A process according to any one of the preceding claims wherein the reaction is conducted at a temperature from 10 to 600C.
Claim 15
Dependent Claim
18 words
A process according to claim 13 wherein the reaction is conducted at a temperature from 40 to 450C.
Claim 16
Dependent Claim
23 words
A process according to any one of the preceding claims wherein the water produced by the reaction is removed from the reaction vessel.
Claim 17
Dependent Claim
14 words
A process according to claim 15 wherein the water is removed using a desiccant.
Claim 18
Dependent Claim
13 words
A process according to claim 16 wherein the desiccant is a molecular sieve.
Claim 19
Dependent Claim
24 words
A process according to any one of the claims 15 to 17 wherein the reaction is carried out in a two chamber reaction vessel.
Claim 20
Dependent Claim
61 words
A process according to any one of the preceding claims which comprises (a) reacting the diacid and the diol or polyol or the hydroxyacid in the presence of a straight or branched chain ether, (b) removing residual starting materials and products having a
molecular weight less than 600 Da, and
(c) subjecting the resulting oligomeric mixture to a further
polyesterification reaction.
Claim 21
Dependent Claim
25 words
A process according to any one of the
preceding claims which further comprises washing the reaction
product with an aqueous solution of a weak base.
Claim 22
Dependent Claim
26 words
A process according to any one of the
preceding claims wherein the polyester has a weight average a molecular weight of from 600 to 5000 Da.
Claim 23
Dependent Claim
21 words
A process according to claim 21 wherein the
polyester has a weight average molecular weight of from 1000 to
4500 Da.
Claim 24
Dependent Claim
20 words
A process according to any one of the
preceding claims wherein the polyester has a dispersity of 1.5
or less.
Claim 25
Dependent Claim
16 words
A process according to claim 23 wherein the
polyester has a dispersity of 1.3 or less.
Claim 26
Dependent Claim
16 words
A process according to claim 24 wherein the
polyester has a dispersity of 1.1 or less.
Claim 27
Dependent Claim
23 words
A process according to any one of the
preceding claims which further comprises reacting the polyester
with isocyanate to form a urethane polymer.
Claim 28
Dependent Claim
8 words
A process substantially as described in
Example 1.
Claim 29
Dependent Claim
8 words
A process substantially as described in
Example 1.
Claim 30
Dependent Claim
17 words
A polyester or polyurethane obtainable by the
process as claimed in any one of the preceding claims.
Claim 31
Dependent Claim
17 words
A polyester or polyurethane produced by the
process as claimed in any one of the preceding claims.
Claim 32
Dependent Claim
30 words
A shaped article comprising a polyester or polyurethane as claimed in claim 28 or 29 or produced by the process as claimed in any one of claims 1 to 27.
References Cited (Backward Citations)
No citation records indexed.
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