EP0533314A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Biodegradable polyester compositions
Assignee: Camelot Superabsorbents Ltd
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Filing: 1992-06-03
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Granted: —
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Expires: 2012-06-03
Abstract
Abstract Co and homopolymers of lactic acid and glycolic acid may be blended with polysaccharides to improve their physical and thermal properties.
Inventors
- 👤 John Kwok
- 👤 James Lunt
- 👤 James M. Makuc
- 👤 Michael Castriotta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 17:55
CPC Classifications
C; C08; C08L; C08L1/00; C08L3/00; C08L67/00; C08L67/04
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
49 words
A biodegradable composition, characterised by comprising: (i) from 98 to 40 weight % of one or more polymers containing structural units of one or more monomers selected from lactic acid, lactide, glycolic acid, and glycolide; and (ii) from 2 to 60 weight % of one or more biodegradable fillers.
Claim 2
Dependent Claim
15 words
A biodegradable composition according to claim 1, characterised by said biodegradable filler is a polysaccharide.
Claim 3
Dependent Claim
39 words
A biodegradable composition according to claim 2, characterised by said biodegradable filler is selected from starch, functionalized starch, cellulose, functionalized cellulose, wood flour, flour of nut shells, and cotton and linen fibre, flock, or flour or a mixture thereof.
Claim 4
Dependent Claim
27 words
A biodegradable composition according to claim 3, characterised by said biodegradable filler is selected from starch, α-cellulose, wood flour, and nut shell flour or a mixture thereof.
Claim 5
Dependent Claim
28 words
A biodegradable composition according to claim 4, characterised by said biodegradable filler is a cellulosic filler and is present in an amount from 5 to 50 weight %.
Claim 6
Dependent Claim
34 words
A biodegradable composition according to claim 5, characterised by said one or more polymers comprises a polymer comprising from 80 to 100 weight % of structural units in either the D or L configuration.
Claim 7
Dependent Claim
22 words
A biodegradable composition according to claim 6 characterised by said one or more polymers is a homopolymer of lactic acid or lactide.
Claim 8
Dependent Claim
28 words
A biodegradable composition according to claim 7, characterised by said polymer comprises from 90 to 100 weight % of structural units in either the L or D configuration.
Claim 9
Dependent Claim
22 words
A biodegradable composition according to claim 6, characterised by said one or more polymers is a homopolymer of glycolic acid or glycolide.
Claim 10
Dependent Claim
28 words
A biodegradable composition according to claim 9, characterised by said polymer comprises from 90 to 100 weight % of structural units in either the L or D configuration.
Claim 11
Dependent Claim
58 words
A biodegradable composition according to claim 6, characterised by said one or more polymers comprises a blend of two or more polymers comprising at least one polymer having at least 80 weight % of structural units in the L configuration; and at least one polymer having at least 80 weight % of structural units in the D configuration.
Claim 12
Dependent Claim
17 words
A biodegradable composition according to claim 11, characterised by said blend comprises a blend of two polymers.
Claim 13
Dependent Claim
58 words
A biodegradable composition according to claim 12, characterised by the weight ratio of polymer containing at least 80 or from 100 to 80 weight % of structural units in the L configuration to the polymer containing at least 80 or from 100 to 80 weight % of structural units in the D configuration is from 100:0 to 0:100.
Claim 14
Dependent Claim
24 words
A biodegradable composition according to claim 6, characterised by having been annealed at a temperature above the Tg of said one or more polymers.
Claim 15
Dependent Claim
19 words
A biodegradable composition according to claim 14, characterised by having been annealed at a temperature from 70 to 150°C.
Claim 16
Dependent Claim
24 words
A biodegradable composition according to claim 7, characterised by having been annealed at a temperature above the Tg of said one or more polymers.
Claim 17
Dependent Claim
19 words
A biodegradable composition according to claim 16, characterised by having been annealed at a temperature from 70 to 150°C.
Claim 18
Dependent Claim
24 words
A biodegradable composition according to claim 9, characterised by having been annealed at a temperature above the Tg of said one or more polymers.
Claim 19
Dependent Claim
19 words
A biodegradable composition according to claim 18, characterised by having been annealed at a temperature from 70 to 150°C.
Claim 20
Dependent Claim
57 words
A disposable household ware or food container characterised by comprising a biodegradable composition comprising: (i) from 98 to 40 weight % of one or more polymers containing structural units of one or more monomers selected from lactic acid, lactide, glycolic acid, and glycolide; and (ii) from 2 to 60 weight % of one or more biodegradable fillers..
Claim 21
Dependent Claim
22 words
A disposable household ware or food container according to claim 20, characterised by said biodegradable composition said biodegradable filler is a polysaccharide.
Claim 22
Dependent Claim
43 words
A disposable household ware or food container according to claim 21, characterised by said biodegradable filler is selected from starch, functionalized starch, cellulose, functionalized cellulose, wood flour, flour of nut shells, and cotton and linen fibre, flock, or flour or a mixture thereof.
Claim 23
Dependent Claim
31 words
A disposable household ware or food container according to claim 22, characterised by said biodegradable filler is selected from starch, α-cellulose, wood flour, and nut shell flour or a mixture thereof.
Claim 24
Dependent Claim
32 words
A disposable household ware or food container according to claim 23, characterised by said biodegradable filler is a cellulosic filler and is present in an amount from 5 to 50 weight %.
Claim 25
Dependent Claim
38 words
A disposable household ware or food container according to claim 24, characterised by said one or more polymers comprises a polymer comprising from 80 to 100 weight % of structural units in either the L or D configuration.
Claim 26
Dependent Claim
26 words
A disposable household ware or food container according to claim 25, characterised by said one or more polymers is a homopolymer of lactic acid or lactide.
Claim 27
Dependent Claim
31 words
A disposable household ware or food container according to claim 26, characterised by said polymer comprises from 90 to 100 weight % of structural units in the L or D configuration.
Claim 28
Dependent Claim
26 words
A disposable household ware or food container according to claim 25, characterised by said one or more polymers is a homopolymer of glycolic acid or glycolide.
Claim 29
Dependent Claim
31 words
A disposable household ware or food container according to claim 28, characterised by said polymer comprises from 80 to 100 weight % of structural units in the L or D configuration.
Claim 30
Dependent Claim
62 words
A disposable household ware or food container according to claim 25, characterised by said one or more polymers comprises a blend of two or more polymers comprising at least one polymer having at least 80 weight % of structural units in the L configuration; and at least one polymer having at least 80 weight % of structural units in the D configuration.
Claim 31
Dependent Claim
21 words
A disposable household ware or food container according to claim 30, characterised by said blend comprises a blend of two polymers.
Claim 32
Dependent Claim
63 words
A disposable household ware or food container according to claim 31, characterised by the weight ratio of polymer containing the at least 80 or from 100 to 80 weight % of structural units in the L configuration to the polymer having at least 80 or from 100 to 80 weight % of structural units in the D configuration is from 100:0 to 0:100.
Claim 33
Dependent Claim
28 words
A disposable household ware or food container according to claim 25, characterised by having been annealed at a temperature above the Tg of said one or more polymers.
Claim 34
Dependent Claim
24 words
A disposable household ware or food container according to claim 33, characterised by having been annealed at a temperature from 70 to 150° C.
Claim 35
Dependent Claim
28 words
A disposable household ware or food container according to claim 26, characterised by having been annealed at a temperature above the Tg of said one or more polymers.
Claim 36
Dependent Claim
23 words
A disposable household ware or food container according to claim 35, characterised by having been annealed at a temperature from 70 to 150°C.
Claim 37
Dependent Claim
28 words
A disposable household ware or food container according to claim 28, characterised by having been annealed at a temperature above the Tg of said one or more polymers.
Claim 38
Dependent Claim
23 words
A disposable household ware or food container according to claim 37, characterised by having been annealed at a temperature from 70 to 150°C.
References Cited (Backward Citations)
No citation records indexed.
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