US5916950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin composition and molded articles thereof
Assignee: Mitsui Chemicals Inc
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Filing: 1997-07-17
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Granted: 1999-06-29
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Expires: 2017-07-17
Abstract
Abstract A thermal resistant resin composition comprising 100 parts by weight of polyester (A) having 25-75% by weight of a lactic acid component consisting of 25-75% by weight of a lactic acid-based polymer (a1) and 25-75% by weight of other aliphatic polyester (a2) having a melting point of 100-250 DEG C., and 0.1-70 parts by weight of a crystalline inorganic filler (B) containing 10% by weight or more of SiO2. The thermal resistant resin composition of the invention performs following function: 1) injection molding can be carried out at a mold temperature of Tg or less or around room temperature with a short molding-cycle, 2) quick crystallization velocity and satisfactory crystallinity can be attained in the molding step, and 3) the molded articles have, as a result, excellent thermal resistance and generate properties of low deterioration of a high polymer component and slow embrittlement in use.
Inventors
- 👤 Shoji Obuchi
- 👤 Takayuki Watanabe
- 👤 Yasuhiro Kitahara
- 👤 Tomoyuki Nakata
- 👤 Kazuhiko Suzuki
- 👤 Masanobu Ajioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:52
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L67/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
74 words
A heat resistant resin composition comprising 100 parts by weight of polyester (A) having 25-75% by weight of lactic acid units and 0.1-70 parts of a crystalline inorganic filler (B) containing 10% by weight or more of SiO 2 , wherein the polyester (A) consists of a mixture of 25-75% by weight of a lactic acid-based polymer (a1) and 25-75% by weight of other aliphatic polyester (a2) having a melting point of 100-250° C.
Claim 2
Dependent Claim
74 words
A heat resistant resin composition comprising 100 parts by weight of polyester (A) having 25-75% by weight of lactic acid units and 0.1-70 parts of a crystalline inorganic filler (B) containing 10% by weight or more of SiO 2 , wherein the polyester (A) consists of a mixture of 25-75% by weight of a lactic acid-based polymer (a1) and 25-75% by weight of other aliphatic polyester (a2) having a melting point of 100-250° C.
Claim 3
Dependent Claim
31 words
The thermal resistant resin composition according to claim 1 wherein the crystalline inorganic filler (B) is one or more fillers selected from the group consisting of talc, kaolin, clay and kaolinite.
Claim 4
Dependent Claim
49 words
The thermal resistant resin composition according to claim 1 wherein the aliphatic polyester (a2) is one or more polyester selected from the group consisting of polyethylene oxalate, polybutylene oxalate, polyneopentyl glycol oxalate, polyethylene succinate, polybutylene succinate, polyglycolic acid, polyhydroxybutyric acid, and a copolymer of β-hydroxybutyric acid with β-hydroxyvaleric acid.
Claim 5
Dependent Claim
46 words
The thermal resistant resin composition according to claim 2 wherein the aliphatic polyester (a2) is one or more polyester selected from the group consisting of polyethylene oxalate, polybutylene oxalate, polyethylene succinate, polybutylene succinate, polyglycolic acid, polyhydroxybutyric acid, and a copolymer of β-hydroxybutyric acid with β-hydroxyvaleric acid.
Claim 6
Dependent Claim
17 words
The thermal resistant resin composition according to claim 4 wherein the aliphatic polyester (a2) is polybutylene succinate.
Claim 7
Dependent Claim
74 words
The thermal resistant resin composition according to claim 3 wherein the lactic acid-based polymer (a1) is one or more polymer selected from the group consisting of polylactic acid, a copolymer consisting of lactic acid and other hydroxycarboxylic acid and containing 50% by weight or more of lactic acid units, and a copolymer consisting of lactic acid, aliphatic diyhydric alcohol and aliphatic dicarboxylic acid and containing 50% by weight or more of lactic acid units.
Claim 8
Dependent Claim
74 words
The thermal resistant resin composition according to claim 4 wherein the lactic acid-based polymer (a1) is one or more polymer selected from the group consisting of polylactic acid, a copolymer consisting of lactic acid and other hydroxycarboxylic acid and containing 50% by weight or more of lactic acid units, and a copolymer consisting of lactic acid, aliphatic dihydric alcohol and aliphatic dicarboxylic acid and containing 50% by weight or more of lactic acid units.
Claim 9
Dependent Claim
18 words
The thermal resistant resin composition according to claim 6 wherein the lactic acid-based polymer (a1) is polylactic acid.
Claim 10
Dependent Claim
18 words
The thermal resistant resin composition according to claim 7 wherein the lactic acid-based polymer (a1) is polylactic acid.
Claim 11
Dependent Claim
33 words
The thermal resistant resin composition according to claim 6 wherein the lactic acid-based polymer (a1) is a copolymer of lactic acid with 6-hydroxycaproic acid or copolymer of lactic acid, 1,4-butanediol and succinic acid.
Claim 12
Dependent Claim
34 words
The thermal resistant resin composition according to claim 7 wherein the lactic acid-based polymer (a1) is a copolymer of lactic acid with 6-hydroxycaproic acid or a copolymer of lactic acid, 1,4-butanediol and succinic acid.
Claim 13
Dependent Claim
19 words
The thermal resistant resin composition according to claim 10 wherein the lactic acid-based polymer (a1) is a block copolymer.
Claim 14
Dependent Claim
19 words
The thermal resistant resin composition according to claim 11 wherein the lactic acid-based polymer (a1) is a block copolymer.
Claim 15
Dependent Claim
22 words
A molded article being obtained from the thermal resistant resin composition according to claim 1 and having heat-resistant temperature of 100-130° C.
Claim 16
Dependent Claim
22 words
A molded article being obtained from the thermal resistant resin composition according to claim 9 and having heat-resistant temperature of 100-130° C.
Claim 17
Dependent Claim
22 words
A molded article being obtained from the thermal resistant resin composition according to claim 11 and having heat-resistant temperature of 100-130° C.
Claim 18
Dependent Claim
22 words
A molded article having obtained from the thermal resistant resin composition according to claim 13 and having heat-resistant temperature of 100-130° C.
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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) | 2002-06-28 | 2002-12-28 | 2003-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-06-28 | 2006-12-28 | 2007-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-06-28 | 2010-12-28 | 2011-06-29 | $7700.00 | Window Closed / Lapsed |