US5902850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syndiotactic styrenic resin composition
Assignee: Idemitsu Kosan Co Ltd
•
Filing: 1996-09-09
•
Granted: 1999-05-11
•
Expires: 2016-09-09
Abstract
Abstract Disclosed is a syndiotactic, polystyrenic resin composition comprising (A) 100 parts by weight of a component composed of (a) from 10 to 98% by weight of a styrene-based polymer having a syndiotactic configuration and (b) from 2 to 90% by weight of a polyolefin, (B) from 0.5 to 50 parts by weight of a block or graft styrene-olefin copolymer having a styrene content of from 40 to 85% by weight; the composition can be formed into articles having good heat resistance, a high modulus of elasticity and good toughness. In addition, the articles are advantageous in that their surface layers are hardly peeled.
Inventors
- 👤 Shinji Chino
- 👤 Akihiko Okada
- 👤 Nobuyuki Satoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:03
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L25/00; C08L25/02; C08L25/04; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L23/10; C08L23/16; C08L25/06; C08L51/00; C08L51/003; C08L51/04; C08L51/06; C08L53/00; C08L53/02; C08L53/025; C08L55/00; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08L2205/00; C08L2205/02; C08L2205/03; C08L2205/035; C08L35/00; C08L35/06; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L91/00; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
A syndiotactic, polystyrenic resin composition comprising resin components of (A) 100 parts by weight of a component composed of (a) from 10 to 98% by weight of a styrene-based polymer having a syndiotactic configuration and (b) from 2 to 90% by weight of a polyolefin, and (B) from 0.5 to 50 parts by weight of a block or graft styrene-olefin copolymer having a styrene content of from 50 to 85% by weight.
Claim 2
Dependent Claim
72 words
A syndiotactic, polystyrenic resin composition comprising resin components of (A) 100 parts by weight of a component composed of (a) from 10 to 98% by weight of a styrene-based polymer having a syndiotactic configuration and (b) from 2 to 90% by weight of a polyolefin, and (B) from 0.5 to 50 parts by weight of a block or graft styrene-olefin copolymer having a styrene content of from 50 to 85% by weight.
Claim 3
Dependent Claim
36 words
The syndiotactic, polystyrenic resin composition as claimed in claim 1, which further contains (E) from 0 to 200 parts by weight, relative to 100 parts by weight of the component (b) of (A), of mineral oils.
Claim 4
Dependent Claim
43 words
The syndiotactic, polystyrenic resin composition as claimed in claim 1, which further contains (F) from 0.5 to 350 parts by weight, relative to 100 parts by weight of the resin components, of an inorganic filler wherein said inorganic filler is a glass fiber.
Claim 5
Dependent Claim
44 words
The syndiotactic, polystyrenic resin composition as claimed in any one of claims 1, wherein the component (B) comprises at least one selected from the group consisting of hydrogenated styrene-butadiene-styrene block copolymers, hydrogenated styrene-isoprene-styrene block copolymers, hydrogenated styrene-butadiene block copolymers and hydrogenated styrene-isoprene block copolymers.
Claim 6
Dependent Claim
32 words
The syndiotactic, polystyrenic resin composition as claimed in any one of claims 1, wherein the component (b) of (A) comprises at least one selected from ethylene-propylene copolymers, ethylene-propylene-diene copolymers, polypropylenes and polyethylenes.
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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) | 2002-05-10 | 2002-11-09 | 2003-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-05-10 | 2006-11-09 | 2007-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-05-10 | 2010-11-09 | 2011-05-11 | $7700.00 | Window Closed / Lapsed |