Patent EP0272902A2 successfully refreshed from Google Patents.
EP0272902A2
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EP
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Polylactide compositions
Assignee: EIDP Inc
•
Filing: 1987-12-21
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Granted: —
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Expires: 2007-12-21
Abstract
Abstract Novel polylactide composition containing segments of poly(R-lactide) interlocked with segments of poly(S-lactide).
Inventors
- 👤 Joseph Richard Murdoch
- 👤 Gary Lee Loomis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 13:46
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; A; A61; A61L; A61L17/00; A61L17/06; A61L17/10; A61L17/12; A61L27/00; A61L27/14; A61L27/18; A61L31/00; A61L31/04; A61L31/06; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; C08J9/00; C08J9/28; D; D01; D01F; D01F6/00; D01F6/58; D01F6/62; D01F6/625; C08J2367/00
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
24 words
A polymeric composition comprising segments of poly(R-lactide) interlocked with segments of poly(S-lactide) wherein at least one of the segments is part of a copolymer.
Claim 2
Dependent Claim
24 words
A polymeric composition comprising segments of poly(R-lactide) interlocked with segments of poly(S-lactide) wherein at least one of the segments is part of a copolymer.
Claim 3
Dependent Claim
24 words
The composition of Claim 1 wherein the molar ratio of R-lactide units to S-lactide units is in the range of about 1:99 to 99:1.
Claim 4
Dependent Claim
24 words
The composition of Claim 2 wherein the molar ratio of R-lactide units to S-lactide units is in the range of about 1:9 to 9:1.
Claim 5
Dependent Claim
12 words
The composition of Claim 3 wherein the molar ratio is about 1:1.
Claim 6
Dependent Claim
25 words
The composition of any one of Claims 1 to 4 wherein each lactide segment has a number average molecular weight of at least about 300.
Claim 7
Dependent Claim
25 words
The composition of any one of Claims 1 to 4 wherein each lactide segment has a number average molecular weight of at least about 10,000.
Claim 8
Dependent Claim
26 words
The composition of any one of Claims 1 to 6 wherein at least one of the poly(lactide) segments is copolymerized with at least one nonlactide comonomer.
Claim 9
Dependent Claim
17 words
The composition of any one of Claims 1 to 7 wherein the copolymer is a block copolymer.
Claim 10
Dependent Claim
13 words
The composition of Claim 8 wherein the block copolymer is a thermoplastic elastomer.
Claim 11
Dependent Claim
15 words
The composition of any one of Claims 1 to 9 wherein the comonomer is epsilon-caprolactone.
Claim 12
Dependent Claim
32 words
A polymeric composition comprising segments of poly(R-lactide) and segments of poly(S-lactide) wherein at least one of the segments is part of a copolymer, said composition melting higher than either of the segments.
Claim 13
Dependent Claim
32 words
A polymeric composition comprising segments of poly(R-lactide) and segments of poly(S-lactide) wherein at least one of the segments is part of a copolymer, said composition melting higher than either of the segments.
Claim 14
Dependent Claim
22 words
The composition of any one of Claims 1 to 5 wherein essentially all of the interlocked segments are in the high-melting phase.
Claim 15
Dependent Claim
22 words
The composition of any one of Claims 6 to 11 wherein essentially all of the interlocked segments are in the high-melting phase.
Claim 16
Dependent Claim
43 words
A process for interlocking polymeric segments of poly(R-lactide) and poly (S-lactide) wherein at least one of the segments is part of a copolymer comprising intimately contacting said segments at a temperature below the melting temperature of the highest melting phase until interlocking occurs.
Claim 17
Dependent Claim
43 words
A process for interlocking polymeric segments of poly(R-lactide) and poly (S-lactide) wherein at least one of the segments is part of a copolymer comprising intimately contacting said segments at a temperature below the melting temperature of the highest melting phase until interlocking occurs.
Claim 18
Dependent Claim
32 words
The process of Claim 14 wherein the segments are interlocked by mixing solid poly(R-lactide) and poly(S-lactide) and heating the combination at a temperature above the melting temperature of the lowest melting phase.
Claim 19
Dependent Claim
16 words
The process of Claim 14 wherein the segments are contacted by dissolving them in a solvent.
Claim 20
Dependent Claim
31 words
The process of Claim 16 wherein the poly(R-lactide) segments and poly (S-lactide) segments are dissolved in separate solvents and then the separate solutions are combined before the combined solvent is evaporated.
Claim 21
Dependent Claim
20 words
The process of Claim 16 or 17 wherein the combined solutions are allowed to gel before the solvent is evaporated.
Claim 22
Dependent Claim
13 words
The process of Claim 16, 17 or 18 wherein the solvent is chloroform.
Claim 23
Dependent Claim
24 words
A polymer composition comprising segments of poly(R-lactide) interacting with segments of poly(S-lactide) wherein at least one of the segments is part of a copolymer.
Claim 24
Dependent Claim
24 words
A polymer composition comprising segments of poly(R-lactide) interacting with segments of poly(S-lactide) wherein at least one of the segments is part of a copolymer.
Claim 25
Dependent Claim
22 words
The composition of Claim 20 wherein the interacting segments have a melting point higher than the melting point of the individual segments.
Claim 26
Dependent Claim
20 words
The composition of any one of Claims 1 to 13, 20 or 21 in the form of a shaped article.
Claim 27
Dependent Claim
11 words
The composition of Claim 22 in the form of a fiber.
Claim 28
Dependent Claim
11 words
The composition of Claim 22 in the form of a film.
Claim 29
Dependent Claim
52 words
A partially crystalline polymeric composition having segments of poly(R-lactide) at least partially interlocked with segments of poly(L-lactide) wherein the interlocked segments have a melting point higher than the melting point of the individual segments and wherein the crystalline portion of the composition at or below 30°C comprises at least 30% high-melting phase.
Claim 30
Dependent Claim
52 words
A partially crystalline polymeric composition having segments of poly(R-lactide) at least partially interlocked with segments of poly(L-lactide) wherein the interlocked segments have a melting point higher than the melting point of the individual segments and wherein the crystalline portion of the composition at or below 30°C comprises at least 30% high-melting phase.
Claim 31
Dependent Claim
15 words
The composition of Claim 25 wherein at least one of the segments is a homopolymer.
Claim 32
Dependent Claim
12 words
The composition of Claim 26 wherein both of the segments are homopolymers.
Claim 33
Dependent Claim
19 words
A polymeric composition comprising segments of poly(R-lactide) interlocked with segments of poly(S-lactide) in the form of a porous structure.
Claim 34
Dependent Claim
19 words
A polymeric composition comprising segments of poly(R-lactide) interlocked with segments of poly(S-lactide) in the form of a porous structure.
Claim 35
Dependent Claim
18 words
A polymeric composition comprising segments of poly(R-lactide) interlocked with segments of poly(S-lactide) in the form of a gel.
Claim 36
Dependent Claim
18 words
A polymeric composition comprising segments of poly(R-lactide) interlocked with segments of poly(S-lactide) in the form of a gel.
Claim 37
Dependent Claim
32 words
A process for interlocking polymeric segments of poly(R-lactide) and poly(S-lactide) comprising dissolving the R- and S- segments in separate solvents and then combining the separate solutions before the combined solvent is evaporated.
Claim 38
Dependent Claim
32 words
A process for interlocking polymeric segments of poly(R-lactide) and poly(S-lactide) comprising dissolving the R- and S- segments in separate solvents and then combining the separate solutions before the combined solvent is evaporated.
Claim 39
Dependent Claim
18 words
The process of forming a porous structure from the gel of Claim 29 comprising solvent exchange and evaporation.
Claim 40
Dependent Claim
29 words
The composition of any one of Claims 25 to 29 wherein the molar ratio of R-lactide units to S-lactide units is in the range of about 1:99 to 99:1.
Claim 41
Dependent Claim
29 words
The composition of any one of Claims 25 to 29 wherein the molar ratio of R-lactide units to S-lactide units is in the range of about 1:9 to 9:1.
Claim 42
Dependent Claim
12 words
The composition of Claim 33 wherein the molar ratio is about 1:1.
Claim 43
Dependent Claim
37 words
The composition of any one of Claims 25 to 29 or 32 to 34 consisting essentially of segments of poly(R-lactide) and segments of poly(S-lactide), each segment having a number average molecular weight of at least about 300.
Claim 44
Dependent Claim
37 words
The composition of any one of Claims 25 to 29 or 32 to 34 consisting essentially of segments of poly(R-lactide) and segments of poly(S-lactide), each segment having a number average molecular weight of at least about 10,000.
Claim 45
Dependent Claim
26 words
The composition of any one of Claims 25 to 29 or 32 to 35 wherein essentially all of the crystalline part is in the high-melting phase.
Claim 46
Dependent Claim
17 words
The composition of Claim 36 wherein essentially all of the crystalline part is in the high-melting phase.
Claim 47
Dependent Claim
21 words
The composition of any one of Claims 25 to 29 or 32 to 38 in the form of a shaped article.
Claim 48
Dependent Claim
11 words
The composition of Claim 39 in the form of a fiber.
Claim 49
Dependent Claim
11 words
The composition of Claim 39 in the form of a film.
Claim 50
Dependent Claim
23 words
The process of Claim 30 wherein the combined segments are precipitated from solution by addition of non-solvent before the combined solvent is evaporated.
Claim 51
Dependent Claim
30 words
The process for interlocking polymeric segments of poly(R-lactide) and poly(S-lactide) comprising intimately contacting said segments at a temperature below the melting temperature of the lowest melting phase until interlocking occurs.
Claim 52
Dependent Claim
30 words
The process for interlocking polymeric segments of poly(R-lactide) and poly(S-lactide) comprising intimately contacting said segments at a temperature below the melting temperature of the lowest melting phase until interlocking occurs.
References Cited (Backward Citations)
No citation records indexed.
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