Patent US4687793A successfully refreshed from Google Patents.
US4687793A
Expired / Lapsed
US
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Thermoplastic resins containing gloxal heat treated cellulosic fillers
Assignee: JNC Corp
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Filing: 1985-12-03
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Granted: 1987-08-18
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Expires: 2005-12-03
Abstract
Abstract A cellulosic filler for thermoplastic resins, which, when blended with thermoplastic resins followed by molding, can afford molded products free from deterioration in mechanical strength, stiffness, resistance to thermal deformation, etc., and a thermoplastic resin composition containing the same are provided, which cellulosic filler is a cellulosic filler heat-treated with glyoxal for thermoplastic resins, the quantity of glyoxal being preferably 0.05 to 12% by weight based on unreated cellulosic filler.
Inventors
- 👤 Tsutomu Motegi
- 👤 Kazuo Aoki
- 👤 Kazuhiro Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:38
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08L; C08L57/00; C08L101/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
54 words
A cellulosic filler for thermoplastic resin compositions comprising an untreated cellulosic filler selected from the group consisting of wood flour, wood chips, rice hulls, used paper, pulp, cellulose powder and mixtures thereof heat-mixed with glyoxal at 80° to 150° C. for 1 to 60 minutes to produce a cellulosic filler having almost no moisture.
Claim 2
Dependent Claim
54 words
A cellulosic filler for thermoplastic resin compositions comprising an untreated cellulosic filler selected from the group consisting of wood flour, wood chips, rice hulls, used paper, pulp, cellulose powder and mixtures thereof heat-mixed with glyoxal at 80° to 150° C. for 1 to 60 minutes to produce a cellulosic filler having almost no moisture.
Claim 3
Dependent Claim
30 words
A cellulosic filler according to claim 1 wherein said heat treatment is carried out with 0.5 to 12% by weight of glyoxal based the weight of the untreated cellulosic filler.
Claim 4
Dependent Claim
97 words
A thermoplastic resin composition having an untreated cellulosic filler selected from the group consisting of wood flour, wood chips, rice hulls, used paper, pulp, cellulose powder and mixtures thereof heat-mixed at 80° to 150° C. for 1 to 60 minutes with 0.5 to 12% by weight of glyoxal, based on the weight of untreated cellulosic filler, to form a heat-mixed cellulosic filler having almost no moisture, blended with a thermoplastic resin, the proportion of said heat-mixed cellulosic filler being in the range of 10 to 65% by weight, based on the weight of said thermoplastic resin composition.
Claim 5
Dependent Claim
97 words
A thermoplastic resin composition having an untreated cellulosic filler selected from the group consisting of wood flour, wood chips, rice hulls, used paper, pulp, cellulose powder and mixtures thereof heat-mixed at 80° to 150° C. for 1 to 60 minutes with 0.5 to 12% by weight of glyoxal, based on the weight of untreated cellulosic filler, to form a heat-mixed cellulosic filler having almost no moisture, blended with a thermoplastic resin, the proportion of said heat-mixed cellulosic filler being in the range of 10 to 65% by weight, based on the weight of said thermoplastic resin composition.
Claim 6
Dependent Claim
55 words
A thermoplastic resin composition according to claim 3 wherein said thermoplastic resin is selected from the group consisting of polypropylene, crystalline copolymers of propylene with at least one monomer selected from the group consisting of ethylene, butene-1 and hexene-1, polyethylene, polybutene, polyvinyl chloride, polystyrene, ABS resin, polyacrylic acid esters, polymethacrylic acid esters and mixtures thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |