Patent US2121097A successfully refreshed from Google Patents.
Patent US4771080A successfully refreshed from Google Patents.
US4771080A
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Expandable vinylidene chloride composition and foam therefrom
Assignee: Asahi Kasei Corp
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Filing: 1987-12-24
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Granted: 1988-09-13
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Expires: 2007-12-24
Abstract
Abstract There is disclosed expandable vinylidene chloride-based resin particles comprising 100 parts by weight of a non-crystalline vinylidene chloride-based resin composition and 1 to 40 parts by weight of a volatile organic blowing agent or a composition thereof, said resin composition consisting of a tetrahydrofuran-soluble component [A] which is a random copolymer having a weight-average molecular weight of 10,000 to 600,000 and constituted of different units represented severally by the following general formulae ##STR1## wherein; R 1 denotes alkyl of 1 to 4 carbon atoms, cyclohexyl, phenyl, or each of R 6 and R 7 being --CH 3 , --C 2 H 5 , --Cl, --Br, --OCH 3 , or --H; each of R 2 and R 4 denotes --H or --CH 3 ; R 3 denotes halogen, --CN, ##STR2## n being an integer 1 to 8 and R 3 ' being --H or --OH; a tetrahydrofuran-insoluble component [B] which is a random copolymer constituted of different units represented severally by the general formula (a), (b), and (c) and the following general formula ##STR3## wherein; (a), (b), (c), R 1 , R 2 , R 3 , R 4 , R 6 and R 7 are defined as above and R 5 denotes phenylene, ##STR4## m being an integer of 2 to 3, l being an integer of 2 to 5, and k being an integer of 2 to 6; the proportions of components [A] and [B] satisfying the conditions: [A]+[B]=100% by weight [A]≧20% by weight and said resin composition having a glass transition temperature of at least 85° C., and foams produced therefrom.
Inventors
- 👤 Ichiro Ibuki
- 👤 Akira Fujie
- 👤 Nobuo Miura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:04
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08J; C08J9/00; C08J9/16; C08J9/18; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/08; C08L27/00; C08L27/02; C08L27/04; C08L27/08; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/08; C08J2333/00; C08J2333/18; C08J2333/20; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
259 words
Expandable vinylidene chloride-based resin particles comprising 100 parts by weight of a non-crystalline vinylidene chloride-based resin composition and 1 to 40 parts by weight of a volatile organic blowing agent or a volatile organic blowing composition, said resin composition consisting of a tetrahydrofuran-soluble component [A] which is a random copolymer having a weight-average molecular weight of 10,000 to 600,000 constituted of different unit represented severally by the following general formulae ##STR17## wherein; R 1 denotes alkyl of 1 to 4 carbon atoms, cyclohexyl, phenyl, or ##STR18## each of R 6 and R 7 being --CH 3 , --C 2 H 5 , --Cl, --Br, --OCH 3 , or --H; each of R 2 and R 4 denotes --H or --CH 3 ; R 3 denotes halogen, --CN, ##STR19## n being an integer 1 to 8 and R 3 ' being --H or --OH; a tetrahydrofuran-insoluble component [B] which is a random copolymer constituted of different units represented severally by the general formulae (a), (b), and (c) and the following general formula (d), ##STR20## wherein; (a), (b), (c), R 1 , R 2 , R 3 , R 4 , R 6 and R 7 are defined as above and R 5 denotes phenylene, ##STR21## m being an integer of 2 to 3, l being an integer of 2 to 5, and k being an integer of 2 to 6; the proportions of components [A] and [B] satisfying the conditions: [A]+[B]=100% by weight [A]≧20% by weight and said resin composition having a glass transition temperature of at least 85° C.
Claim 2
Dependent Claim
259 words
Expandable vinylidene chloride-based resin particles comprising 100 parts by weight of a non-crystalline vinylidene chloride-based resin composition and 1 to 40 parts by weight of a volatile organic blowing agent or a volatile organic blowing composition, said resin composition consisting of a tetrahydrofuran-soluble component [A] which is a random copolymer having a weight-average molecular weight of 10,000 to 600,000 constituted of different unit represented severally by the following general formulae ##STR17## wherein; R 1 denotes alkyl of 1 to 4 carbon atoms, cyclohexyl, phenyl, or ##STR18## each of R 6 and R 7 being --CH 3 , --C 2 H 5 , --Cl, --Br, --OCH 3 , or --H; each of R 2 and R 4 denotes --H or --CH 3 ; R 3 denotes halogen, --CN, ##STR19## n being an integer 1 to 8 and R 3 ' being --H or --OH; a tetrahydrofuran-insoluble component [B] which is a random copolymer constituted of different units represented severally by the general formulae (a), (b), and (c) and the following general formula (d), ##STR20## wherein; (a), (b), (c), R 1 , R 2 , R 3 , R 4 , R 6 and R 7 are defined as above and R 5 denotes phenylene, ##STR21## m being an integer of 2 to 3, l being an integer of 2 to 5, and k being an integer of 2 to 6; the proportions of components [A] and [B] satisfying the conditions: [A]+[B]=100% by weight [A]≧20% by weight and said resin composition having a glass transition temperature of at least 85° C.
Claim 3
Dependent Claim
33 words
The expandable vinylidene chloride-based resin particles of claim 1, wherein said proportions of the tetrahydrofuran-soluble component [A] and the tetrahydrofuran-insoluble component [B] satisfy the conditions: [A]+[B]=100% by weight 20% by weight≦[A]≦90% by weight.
Claim 4
Dependent Claim
35 words
The expandable vinylidene chloride-based resin particles of claim 1, wherein said non-crystalline vinylidene chloride-based resin composition has a glass transition temperature of at least 85° C. and a limiting oxygen index of at least 24%.
Claim 5
Dependent Claim
38 words
The expandable vinylidene chloride-based resin particles of claim 1, wherein said non-crystalline vinylidene chloride-based resin composition exhibits an elongation exceeding 200% in the temperature range of from the glass transition temperature (Tg) of the resin composition to (Tg+50)°C.
Claim 6
Dependent Claim
21 words
The expandable vinylidene chloride-based resin particles of claim 1 which have particle diameters in the range of 0.1 to 1 mm.
Claim 7
Dependent Claim
74 words
The expandable vinylidene chloride-based resin particles of claim 1, wherein said tetrahydrofuran-soluble component [A] is constituted of units of the general formulae (a), (b), and (c) in proportions of 30-70 mole %, 1-10 mole %, and 25-70 mole %, respectively, and said tetrahydrofran-insoluble component [B] is constituted of unit of general formulae (a), (b), (c), and (d) in proportions of 25-65 mole %, 1-10 mole %, 25-70 mole %, and 0.01-0.2 mole %, respectively.
Claim 8
Dependent Claim
22 words
The expandable vinylidene chloride-based resin particles of claim 1, wherein said constitutional unit (c) is composed of randomizedly bonded acrylonitrile and styrene.
Claim 9
Dependent Claim
32 words
The expandable vinylidene chloride-based resin particles of claim 1, wherein said volatile organic blowing agent has a lower boiling point than the glass transition temperature of the non-crystalline vinylidene chloride-based resin composition.
Claim 10
Dependent Claim
24 words
The expandable vinylidene chloride-based resin particles of claim 1, wherein said volatile organic blowing agent has a mole-average solubility parameter of 5.7 to 9.7.
Claim 11
Dependent Claim
128 words
A heat resistant molded vinylidene chloride-based resin foam constructed of numerous multicellular expanded particles which comprise a non-crystalline vinylidene chloride-based resin composition consisting of a tetrahydrofuran-soluble component [A] which is a random copolymer constituted of different units represented severally by the general formulae (a), (b), and (c) and has a weight-average molecular weight of 10,000 to 600,000 and a tetrahydrofuran-insoluble component [B] which is a random copolymer constituted of different units represented severally by the general formulae (a), (b), (c), and (d), the proportions of components [A] and [B] statisfying the conditions: [A]+[B]=100% by weight [A]20% by weight, said resin composition having a glass transition temperature of at least 85° C., and said multicellular expanded particles being fused together and in intimate contact with neighboring particles of them.
Claim 12
Dependent Claim
128 words
A heat resistant molded vinylidene chloride-based resin foam constructed of numerous multicellular expanded particles which comprise a non-crystalline vinylidene chloride-based resin composition consisting of a tetrahydrofuran-soluble component [A] which is a random copolymer constituted of different units represented severally by the general formulae (a), (b), and (c) and has a weight-average molecular weight of 10,000 to 600,000 and a tetrahydrofuran-insoluble component [B] which is a random copolymer constituted of different units represented severally by the general formulae (a), (b), (c), and (d), the proportions of components [A] and [B] statisfying the conditions: [A]+[B]=100% by weight [A]20% by weight, said resin composition having a glass transition temperature of at least 85° C., and said multicellular expanded particles being fused together and in intimate contact with neighboring particles of them.
Claim 13
Dependent Claim
35 words
The molded vinylidene chloride-based resin foam of claim 10, wherein said proportions of the tetrahydrofuran-soluble component [A] and the tetrahydrofuran-insoluble component [B] satisfy the conditions: [A]+[B]=100% by weight 20% by weight [A] 90% by weight.
Claim 14
Dependent Claim
35 words
The molded vinylidene chloride-based resin foam of claim 10, wherein said non-crystalline vinylidene chloride-based resin composition has a glass transition temperature of at least 85° C. and a limiting oxygen index of at leat 24%.
Claim 15
Dependent Claim
18 words
The molded vinylidene chloride-based resin foam of claim 10, which has a density of 15-300 kg/m 3 .
Claim 16
Dependent Claim
24 words
The molded vinylidene chloride-based resin foam of claim 10, wherein the proportion of closed cells in said multicellular expanded particles is at least 60%.
Claim 17
Dependent Claim
24 words
The molded vinylidene chloride-based resin foam of claim 10, the percentage volume change of which on heating at 70° C. does not exceed 5%.
Claim 18
Dependent Claim
75 words
The molded vinylidene chloride-based resin foam of claim 10, wherein said tetrahydrofuran-soluble component [A] is constituted of units of the general formulae (a), (b), and (c) in proportions of 30-70 mole %, 1-10 mole %, and 25-70 mole %, respectively, and said tetrahydrofuran-insoluble component [B] is constituted of units of the general formulae (a), (b), (c), and (d) in proportions of 25-65 mole %, 1-10 mole %, 25-70 mole %, and 0.01-0.2 mole %, respectively.
Claim 19
Dependent Claim
23 words
The molded vinylidene chloride-based resin foam of claim 10, wherein the constitutional unit (c) is a composed of randomizedly bonded acrylonitrile and styrene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |