US4254028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Styrene resin composition
Assignee: Asahi Kasei Corp
•
Filing: 1979-09-10
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Granted: 1981-03-03
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Expires: 1999-09-10
Abstract
Abstract Improved mold release is obtained in a styrene polymer by incorporating a mixture of fatty acid and metal fatty acid salt.
Inventors
- 👤 Shohachi Ono
- 👤 Noriaki Umeda
- 👤 Hisayoshi Kai
- 👤 Kenichi Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:26
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
90 words
A styrene resin composition for injection moldings and injection blow moldings with an improved weldline strength, characterized by comprising a styrene resin and additives consisting of at least one of saturated linear carboxylic acids having 12 to 22 carbon atoms (A) and at least one of metal salts of higher fatty acids (B), said additives totaling to 0.07 to 0.4 part by weight based on 100 parts by weight of said styrene resin and the weight ratio of said component (B) to said component (A) ranging from 1/3 to 3.5.
Claim 2
Dependent Claim
90 words
A styrene resin composition for injection moldings and injection blow moldings with an improved weldline strength, characterized by comprising a styrene resin and additives consisting of at least one of saturated linear carboxylic acids having 12 to 22 carbon atoms (A) and at least one of metal salts of higher fatty acids (B), said additives totaling to 0.07 to 0.4 part by weight based on 100 parts by weight of said styrene resin and the weight ratio of said component (B) to said component (A) ranging from 1/3 to 3.5.
Claim 3
Dependent Claim
25 words
The styrene resin composition according to claim 1 wherein the weight ratio of said component (B) to said component (A) ranges from 1/2 to 2.0.
References Cited (Backward Citations)
US2675362A
Cited
US2779744A
Cited
US3355404A
Cited
US3666699A
Cited
US4033912A
Cited
US4088617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |