US5216073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoset LCP blends
Assignee: CNA Holdings LLC
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Filing: 1992-07-01
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Granted: 1993-06-01
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Expires: 2012-07-01
Abstract
Abstract A moldable thermoset composition comprising about 5-60% liquid crystal polymer and about 95-40% of an epoxy-functional rubber by weight, a process for making and a process for using same. The composition is made by melt mixing the LCP and the epoxy-rubber to form a blend. This blend is then cooled and may be molded, extruded, or otherwise formed into a desired shape. The composition is then heat-treated to make it set.
Inventors
- 👤 M. Ishaq Haider
- 👤 Vincent J. Sullivan
- 👤 Paul N. Chen, Sr.
- 👤 Harry S. Pulaski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:21
CPC Classifications
C; C08; C08L; C08L63/00; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L23/0884; C08L67/00; C08L67/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
41 words
A moldable thermoset composition comprising: about 5-60% by weight liquid crystal polymer; and, about 95-40% by weight of an epoxy-functional rubber compound, wherein said liquid crystal polymer and said epoxy-functional rubber compound have been combined and then melt mixed until well-blended.
Claim 2
Dependent Claim
41 words
A moldable thermoset composition comprising: about 5-60% by weight liquid crystal polymer; and, about 95-40% by weight of an epoxy-functional rubber compound, wherein said liquid crystal polymer and said epoxy-functional rubber compound have been combined and then melt mixed until well-blended.
Claim 3
Dependent Claim
17 words
The composition of claim 1 wherein said epoxy-functional rubber compound is a polyolefin having epoxy-functional side chains.
Claim 4
Dependent Claim
15 words
The composition of claim 2 wherein said epoxy-functional side chains are epoxy-containing vinyl polymer groups.
Claim 5
Dependent Claim
20 words
The composition of claim 1 wherein said epoxy-functional rubber compound is a terpolymer of ethylene, glycidyl methacrylate and acrylate units.
Claim 6
Dependent Claim
31 words
The composition of claim 1 wherein said epoxy-functional rubber compound is an ethylene glycidyl methacrylate copolymer (85/15 w/w) copolymer grafted with 30% by weight of any of polystyrene, polymethylmethacrylate, or polyacrylonitrle-styrene.
Claim 7
Dependent Claim
14 words
The composition of claim 1 wherein said liquid crystal polymer is an aromatic polyester.
Claim 8
Dependent Claim
103 words
The composition of claim 1 wherein said liquid crystal polymer is chosen from the group consisting of: a polymer comprising monomer units derived from 4-hydroxybenzoic acid (73 mole %) and 6-hydroxy-2-naphthoic acid (27 mole %); a polymer comprising monomer units derived from 6-hydroxy-2-naphthoic acid (60 mole %), terephthalic acid (20 mole %), and p-acetaminophenol (20 mole %); a polymer comprising monomer units derived from 4-hydroxybenzoic acid (80 mole %) and 6-hydroxy-2-naphthoic acid (20 mole %); and a polymer comprising monomer units derived from 4-hydroxybenzoic acid (60 mole %), 6-hydroxy-2-naphthoic acid (5 mole %) terephthalic acid (17.5 mole %) and biphenol (17.5 mole %).
Claim 9
Dependent Claim
35 words
The composition of claim 7 wherein said liquid crystal polymer is chosen from the group consisting of: a polymer comprising monomer units derived from 1-hydroxybenzoic acid (73 mole %) and 6-hydroxy-2-naphthoic acid (27 mole %).
Claim 10
Dependent Claim
20 words
The composition of claim 1 wherein said liquid crystal polymer content is between about 30% and about 60% by weight.
Claim 11
Dependent Claim
20 words
The composition of claim 1 wherein said liquid crystal polymer content is between about 20% and about 50% by weight.
Claim 12
Dependent Claim
18 words
The composition of claim 1 wherein said liquid crystal polymer content is at least about 50% by weight.
Claim 13
Dependent Claim
20 words
The composition of claim 1 wherein said liquid crystal polymer content is between about 30% and about 50% by weight.
Claim 14
Dependent Claim
24 words
A thermoset article comprising a composition according to claim 1 wherein said composition has been cured by heat treatment until said composition has set.
Claim 15
Dependent Claim
34 words
A thermoset article according to claim 13 wherein said heat treatment comprises heating said composition to a temperature of at least about 200° C. and maintaining said temperature for at least about 5 minutes.
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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) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |