US4670508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic resin composition
Assignee: Mitsui Chemicals Inc
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Filing: 1985-01-02
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Granted: 1987-06-02
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Expires: 2005-01-02
Abstract
Abstract A thermoplastic resin composition comprising a melt mixed product of (A) 70% to 98% by weight of at least one thermoplastic resin selected from the group consisting of polyamides, polyacetals, polyesters, and polycarbonates and (B) 30% to 2% by weight of ultra-high molecular weight polyolefin powder having an intrinsic viscosity [ eta ] of 10 dl/g or more, measured in decalin at 135 DEG C., and having an average particle size of 80 mu m or less and having a particle size distribution such that substantially all of the powder particles pass through a sieve having a sieve number of 100 and at least 20% by weight of the total powder particles pass through a sieve having a sieve number of 350. This thermoplastic resin composition has excellent abrasion resistance, excellent impact resistance, and a high critical PV value.
Inventors
- 👤 Akio Ohdaira
- 👤 Michiharu Suga
- 👤 Akifumi Kato
- 👤 Toshio Kobayashi
- 👤 Akira Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:22
CPC Classifications
C; C08; C08L; C08L101/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A thermoplastic resin composition comprising a melt mixed product of (A) 70% to 98% by weight of at least one thermoplastic resin selected from the group consisting of polyamides, polyacetals, polyesters, and polycarbonates and (B) 30% to 2% by weight of an ultra-high molecular weight polyolefin powder having an intrinsic viscosity of at least 12.1 dl/g, measured in decalin at 135° C., and having an average particle size of at most 80 μm and a particle size distribution such that substantially all of the powder particles pass through a sieve having a sieve mesh number of 100 and at least 20% by weight of the total powder particles pass through a sieve having a sieve mesh number of 350.
Claim 2
Dependent Claim
119 words
A thermoplastic resin composition comprising a melt mixed product of (A) 70% to 98% by weight of at least one thermoplastic resin selected from the group consisting of polyamides, polyacetals, polyesters, and polycarbonates and (B) 30% to 2% by weight of an ultra-high molecular weight polyolefin powder having an intrinsic viscosity of at least 12.1 dl/g, measured in decalin at 135° C., and having an average particle size of at most 80 μm and a particle size distribution such that substantially all of the powder particles pass through a sieve having a sieve mesh number of 100 and at least 20% by weight of the total powder particles pass through a sieve having a sieve mesh number of 350.
Claim 3
Dependent Claim
23 words
A thermoplastic resin composition as claimed in claim 1, wherein said component (B) is ultra-high molecular weight ethylene homopolymer or ethylene copolar powder.
Claim 4
Dependent Claim
46 words
A thermoplastic resin composition as claimed in claim 1, wherein said component (B) is an ultra-high molecular weight polyolefin powder modified by including at least one polar group selected from the group consisting of acid groups, ester groups, amide groups, acid anhydride groups, and epoxide groups.
Claim 5
Dependent Claim
42 words
A thermoplastic resin composition as claimed in claim 3, wherein the content of the polar groups unit in the modified polyolefin powder is 0.01 to 10 parts by weight, based on 100 parts by weight of the ultra-high molecular weight polyolefin powder.
Claim 6
Dependent Claim
86 words
A thermoplastic resin composition as claimed in claim 3, wherein the component (B) is a modified ultra-high molecular weight polyethylene powder prepared by grafting maleic anhydride to an ultra-high molecular weight polyethylene powder having an intrinsic viscosity of at least 12.1 dl/g, measured in decalin at 135°, and having an average powder particle size of to 80 μm and a particle size distribution such that at least 20% bv weight of the total powder particles pass through a sieve having a sieve mesh number of 350.
References Cited (Backward Citations)
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US4362846A
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US4305865A
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US4317764A
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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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |