Patent US4503187A successfully refreshed from Google Patents.
US4503187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
P-Methylstyrene copolymer blends
Assignee: Mobil Oil AS
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Filing: 1983-12-05
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Granted: 1985-03-05
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Expires: 2003-12-05
Abstract
Abstract This invention provides a high molecular weight copolymer blend of polyethylene and poly(para-methylstyrene) or high impact poly(p-methylstyrene) in the presence of a hydrogenated compatibilizing agent, such as a hydrogenated butadiene diblock.
Inventors
- 👤 Binnur Z. Gunesin
- 👤 Alex W. Kawczak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:25
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/16; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L53/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
39 words
A high molecular weight blend comprising in combination from 10 to 50 percent by weight polyethylene, from 50 to 90 percent by weight poly(para-methylstyrene) and from 2 to 10 percent by weight of a hydrogenated diene diblock compatibilizing agent.
Claim 2
Dependent Claim
39 words
A high molecular weight blend comprising in combination from 10 to 50 percent by weight polyethylene, from 50 to 90 percent by weight poly(para-methylstyrene) and from 2 to 10 percent by weight of a hydrogenated diene diblock compatibilizing agent.
Claim 3
Dependent Claim
27 words
The blend according to claim 1, wherein said polyethylene is selected from the group consisting of low density polyethylene, linear low density polyethylene, and high density polyethylene.
Claim 4
Dependent Claim
13 words
The blend according to claim 1, wherein said poly(para-methylstyrene) is high impact poly(para-methylstyrene).
Claim 5
Dependent Claim
16 words
The blend according to claim 1, wherein said compatibilizing agent is a hydrogenated butadiene diblock copolymer.
Claim 6
Dependent Claim
16 words
The blend according to claim 4, wherein said compatibilizing agent is a hydrogenated butadiene-styrene diblock copolymer.
Claim 7
Dependent Claim
16 words
The blend according to claim 5, wherein said compatibilizing agent is a hydrogenated butadiene-paramethylstyrene diblock copolymer.
Claim 8
Dependent Claim
16 words
The blend according to claim 1, wherein said compatibilizing agent is a hydrogenated isoprene diblock copolymer.
Claim 9
Dependent Claim
16 words
The blend according to claim 7, wherein said compatibilizing agent is a hydrogenated isoprene-styrene diblock copolymer.
Claim 10
Dependent Claim
16 words
The blend according to claim 8, wherein said compatibilizing agent is a hydrogenated isoprene-paramethylstyrene diblock copolymer.
Claim 11
Dependent Claim
21 words
The blend according to claim 1, wherein said compatibilizing agent is present in an amount between 2 and 5% by weight.
Claim 12
Dependent Claim
20 words
The blend according to claim 1, said blend having an Izod Notched 1/8" impact strength greater than 5 ft lb/in.
Claim 13
Dependent Claim
20 words
The blend according to claim 1, said blend having an Izod Notched 1/8" impact strength greater than 7 ft lb/in.
Claim 14
Independent Claim
54 words
A method of preparing a polymer blend comprising from 10 to 50 percent by weight polyethylene, from 50 to 90 percent by weight poly(para-methylstyrene) and from 2 to 10 percent by weight of a hydrogenated diene diblock compatibilizing agent, said method comprising blending said polyethylene, poly(para-methylstyrene) and compatibilizing agent in the presence of heat.
Claim 15
Independent Claim
54 words
A method of preparing a polymer blend comprising from 10 to 50 percent by weight polyethylene, from 50 to 90 percent by weight poly(para-methylstyrene) and from 2 to 10 percent by weight of a hydrogenated diene diblock compatibilizing agent, said method comprising blending said polyethylene, poly(para-methylstyrene) and compatibilizing agent in the presence of heat.
Claim 16
Dependent Claim
16 words
The method according to claim 13, wherein said polyethylene, poly(para-methylstyrene) and compatibilizing agent are blended simultaneously.
Claim 17
Dependent Claim
35 words
The method according to claim 13, wherein said blending comprises the following steps: (1) combining said compatibilizing agent with said polyethylene to form a blended mixture; and (2) combining said poly(para-methylstyrene) with said blended mixture.
Claim 18
Dependent Claim
23 words
The method according to claim 15, wherein said compatibilizing agent is combined with said polyethylene at a temperature between 150° and 200° C.
Claim 19
Dependent Claim
21 words
The method according to claim 15, wherein said compatibilizing agent is combined with said polyethylene at a temperature of 160° C.
Claim 20
Dependent Claim
23 words
The method according to claim 15, wherein said poly(paramethylstyrene) is combined with said blended mixture at a temperature between 175° and 270° C.
Claim 21
Dependent Claim
21 words
The method according to claim 15, wherein said poly(paramethylstyrene) is combined with said blended mixture at a temperature of 200° 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) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |