US4126662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for limiting gloss of injection moldable polymers
Assignee: ConocoPhillips Co
•
Filing: 1975-10-09
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Granted: 1978-11-21
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Expires: 1995-10-09
Abstract
Abstract An injection molded polymer having limited surface gloss is provided by preparing an admixture of an injection moldable polymer substrate and an additive chosen from among the group consisting of finely divided textile fibers, finely divided hydrocarbon polymers, and blowing agents and injection molding an article from the admixture. In the embodiment of the invention employing blowing agents the admixing is carried out at a temperature below that at which the blowing agent is activated and the injection molding is carried out at a temperature sufficient to activate the decomposition of the blowing agent.
Inventors
- 👤 Terence C. Middlebrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:17
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/14; Y10S264/83
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A method for limiting gloss of an injection molded elastomeric polymer said polymer being chosen from either linear or radial block copolymers which have thermoplastic blocks and elastomeric blocks with terminal blocks of thermoplastic said method comprising: (a) preparing an admixture of said injection moldable elastomeric polymer and an additive of finely divided textile fibers ranging in size up to about 3 millimeters in length, said additive being in an amount of about 2 to about 30 parts by weight per 100 parts of block copolymer effective to limit gloss of the molded polymer; and (b) injection molding an article from said admixture.
Claim 2
Independent Claim
103 words
A method for limiting gloss of an injection molded elastomeric polymer said polymer being chosen from either linear or radial block copolymers which have thermoplastic blocks and elastomeric blocks with terminal blocks of thermoplastic said method comprising: (a) preparing an admixture of said injection moldable elastomeric polymer and an additive of finely divided textile fibers ranging in size up to about 3 millimeters in length, said additive being in an amount of about 2 to about 30 parts by weight per 100 parts of block copolymer effective to limit gloss of the molded polymer; and (b) injection molding an article from said admixture.
Claim 3
Dependent Claim
25 words
A method of claim 1 wherein said textile fibers are chosen from among cotton flock, wool fibers, linen fibers, nylon, poly(ethylene terphthalate), polyacrylonitrile and rayon.
Claim 4
Dependent Claim
12 words
A method of claim 2 wherein the textile fiber is cotton flock.
Claim 5
Dependent Claim
13 words
A method of claim 1 wherein said elastomeric polymer is linear block copolymer.
Claim 6
Dependent Claim
13 words
A method of claim 1 wherein said elastomeric polymer is radial block copolymer.
Claim 7
Independent Claim
121 words
A method for limiting gloss of an injection molded, solution polymerized, elastomeric polymer said polymer being chosen from either linear or radial block copolymers which have elastomeric blocks of polybutadiene, polyisoprene, acrylonitrile, acrylonitrile/butadiene, or butadiene/styrene, with terminal thermoplastic blocks of styrene said method comprising: (a) preparing an admixture of said injection moldable elastomeric polymer and an additive of finely divided particles of hydrocarbon polymers chosen from among high density polyethylene, low density polyethylene, crystalline polypropylene and ethylene-propylene copolymers and ranging in size from about 5 microns to about 0.25 inch, said additive being in an amount of about 5 to about 50 parts by weight per hundred parts of moldable elastomeric polymer; and (b) injection molding an article of said admixture.
Claim 8
Independent Claim
121 words
A method for limiting gloss of an injection molded, solution polymerized, elastomeric polymer said polymer being chosen from either linear or radial block copolymers which have elastomeric blocks of polybutadiene, polyisoprene, acrylonitrile, acrylonitrile/butadiene, or butadiene/styrene, with terminal thermoplastic blocks of styrene said method comprising: (a) preparing an admixture of said injection moldable elastomeric polymer and an additive of finely divided particles of hydrocarbon polymers chosen from among high density polyethylene, low density polyethylene, crystalline polypropylene and ethylene-propylene copolymers and ranging in size from about 5 microns to about 0.25 inch, said additive being in an amount of about 5 to about 50 parts by weight per hundred parts of moldable elastomeric polymer; and (b) injection molding an article of said admixture.
Claim 9
Dependent Claim
13 words
A method of claim 6 wherein the hydrocarbon polymer is low density polyethylene.
Claim 10
Dependent Claim
13 words
A method of claim 14 wherein said elastomeric polymer is linear block copolymer.
Claim 11
Dependent Claim
13 words
A method of claim 14 wherein said elastomeric polymer is radial block copolymer.
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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) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |