Patent GB2010501A successfully refreshed from Google Patents.
US5039714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber-modified polystyrene resin composition
Assignee: Asahi Kasei Corp
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Filing: 1989-04-10
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Granted: 1991-08-13
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Expires: 2009-04-10
Abstract
Abstract A high-gloss, impact-resistant rubber-modified polystyrene composition, characterized in that said rubber-modified polystyrene consists essentially of (i) a polystyrene, (ii) dispersed particles of elastomeric polymers, and optionally polydimethylsiloxane and at least one member selected from the group consisting of mineral oil, and metallic salts or amides of higher fatty acids based on the total weight of the composition.
Inventors
- 👤 Hideo Kasahara
- 👤 Masashi Sakamoto
- 👤 Hiroaki Ishikawa
- 👤 Kiyoshi Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:34
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
63 words
A high-gloss, impact-resistant rubber-modified composition comprises (i) a polystyrene, (ii) dispersed particles of elastomeric polymers having two peaks in particle size distribution; one peak being a small-particle component having a mean particle diameter of 0.1 to 0.6 micron with single occlusion structure and the other being a large-particle component having a mean particle diameter of 0.7 to 1.9 microns with cellular particle structure.
Claim 2
Dependent Claim
63 words
A high-gloss, impact-resistant rubber-modified composition comprises (i) a polystyrene, (ii) dispersed particles of elastomeric polymers having two peaks in particle size distribution; one peak being a small-particle component having a mean particle diameter of 0.1 to 0.6 micron with single occlusion structure and the other being a large-particle component having a mean particle diameter of 0.7 to 1.9 microns with cellular particle structure.
Claim 3
Dependent Claim
34 words
The composition of claim 1 wherein 20-95% by weight of the total amount of a polybutadiene component of the elastomeric polymers in the composition are small-particle component, and 5-80% by weight are large-particle component.
Claim 4
Dependent Claim
18 words
The composition of claim 1 wherein said small-particle particle component has a mean particle diameter of 0.2-0.5 micron.
Claim 5
Dependent Claim
17 words
The composition of claim 1 wherein the large-particle component has a mean particle diameter of 1.0-1.8 microns.
Claim 6
Dependent Claim
15 words
The composition of claim 1, which further comprises 0.05 to 0.8% by weight of polyoxydimethylsiloxane.
Claim 7
Dependent Claim
35 words
The composition of claim 5, wherein 20-95% by weight of the total amount of a polybutadiene component of the elastomeric polymers in the composition are small-particle component, and 5-80% by weight are large particle component.
Claim 8
Dependent Claim
17 words
The composition of claim 5 wherein said small-particle component has a mean particle diameter of 0.2-0.5 micron.
Claim 9
Dependent Claim
17 words
The composition of claims 5 wherein the large-particle component has a mean particle diameter of 1.0-1.8 microns.
Claim 10
Dependent Claim
43 words
The composition of claim 5, which further comprises at least one member selected from the group consisting of 0.25 to 4.0% by weight of mineral oil, 0.1 to 0.5% by weight of metallic salts or amides of higher fatty acids and mixtures thereof.
Claim 11
Dependent Claim
34 words
The composition of claim 9, wherein 20-95% by weight of the total amount of a polybutadiene component of the elastomeric polymers in the composition are small-particle component and 5-80% by weight are large-particle component.
Claim 12
Dependent Claim
17 words
The composition of claim 9 wherein said small-particle component has a mean particle diameter of 0.2-0.5 micron.
Claim 13
Dependent Claim
17 words
The composition of claims 9 wherein the large-particle component has a mean particle diameter of 1.0-1.8 microns.
References Cited (Backward Citations)
JPS553494A
Cited
US4493922A
Cited
JPS57172948A
Cited
JPS57187345A
Cited
JPS57187346A
Cited
JPS61183339A
Cited
JPS61183341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |