US3985702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry blending and molding process
Assignee: Shell USA Inc
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Filing: 1975-05-27
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Granted: 1976-10-12
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Expires: 1995-05-27
Abstract
Abstract A process is provided for making a molded article having both a thermoplastic polymer component and a thermoplastic rubber component which comprises dry blending small particles of thermoplastic rubber with particles of thermoplastic polymer having an average particle size diameter less than about 1.0 mm; and a liquid plasticizer; and forming the dry blended mixture into a molded article.
Inventors
- 👤 Glenn Roy Himes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:27
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/005; C08L; C08L57/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
96 words
The process for making a molded article having a thermoplastic elastomer component and a thermoplastic polymer component selected from the group consisting of polystyrene, ethylene vinyl acetate copolymer, polyethylene, polypropylene and mixtures thereof, comprising: a. forming small particles of thermoplastic rubber; b. forming particles of thermoplastic polymer having an average particle size diameter less than about 1.0 mm; c. dry blending the particles from steps a) and b) together with a liquid plasticizer for at least the rubber or the polymer to produce a free-flowing particulate mixture; d. and forming the mixture into a molded article.
Claim 2
Dependent Claim
96 words
The process for making a molded article having a thermoplastic elastomer component and a thermoplastic polymer component selected from the group consisting of polystyrene, ethylene vinyl acetate copolymer, polyethylene, polypropylene and mixtures thereof, comprising: a. forming small particles of thermoplastic rubber; b. forming particles of thermoplastic polymer having an average particle size diameter less than about 1.0 mm; c. dry blending the particles from steps a) and b) together with a liquid plasticizer for at least the rubber or the polymer to produce a free-flowing particulate mixture; d. and forming the mixture into a molded article.
Claim 3
Dependent Claim
22 words
A process according to claim 1 wherein the thermoplastic elastomer is a block copolymer of a conjugated diene and a monalkenyl arene.
Claim 4
Dependent Claim
12 words
A process according to claim 1 wherein the thermoplastic polymer is polystyrene.
Claim 5
Dependent Claim
13 words
A process according to claim 1 wherein the plasticizer is a hydrocarbon oil.
Claim 6
Dependent Claim
26 words
A process according to claim 1 wherein the thermoplastic polymer particles formed in step (b) have an average particle size between about 0.15 and 0.75 mm.
Claim 7
Dependent Claim
66 words
A process according to claim 1 for making molded footwear component comprising: a. forming small particles of a thermoplastic elastomeric block copolymer of styrene and butadiene; b. forming particles of polystyrene having an average particle size diameter between about 0.15 and 0.75 mm; c. dry blending the block copolymer and polystyrene with a plasticizing proportion of a mineral oil; and d. molding the mixture so formed.
Claim 8
Dependent Claim
79 words
The process for making a molded article having a blended thermoplastic elastomer component and a thermoplastic polymer component which comprises a. dry blending particles of a thermoplastic polymer, selected from the group consisting of polystyrene, ethylene vinyl acetate copolymer, polyethylene, polypropylene and mixtures thereof, the particles being less than about 1 mm average diameter, a plasticizer and small particles of a thermoplastic elastomer to form a free flowing particulate mixture; and b. forming the mixture into a molded article.
Claim 9
Dependent Claim
79 words
The process for making a molded article having a blended thermoplastic elastomer component and a thermoplastic polymer component which comprises a. dry blending particles of a thermoplastic polymer, selected from the group consisting of polystyrene, ethylene vinyl acetate copolymer, polyethylene, polypropylene and mixtures thereof, the particles being less than about 1 mm average diameter, a plasticizer and small particles of a thermoplastic elastomer to form a free flowing particulate mixture; and b. forming the mixture into a molded article.
Claim 10
Dependent Claim
25 words
A process according to claim 7 wherein the thermoplastic polymer is polystyrene, the average particle diameter of which is between about 0.15 and 0.75 mm.
Claim 11
Dependent Claim
68 words
In a process for molding an article from a mixture of a thermoplastic polymer and a thermoplastic elastomer, wherein a plasticizer and small particles of both said rubber and polymer are dry blended to form a free flowing particulate mixture and forming the mixture into a molded article, the improvement comprising using particles of the thermoplastic polymer having an average particle size diameter less than about 1 mm.
Claim 12
Dependent Claim
68 words
In a process for molding an article from a mixture of a thermoplastic polymer and a thermoplastic elastomer, wherein a plasticizer and small particles of both said rubber and polymer are dry blended to form a free flowing particulate mixture and forming the mixture into a molded article, the improvement comprising using particles of the thermoplastic polymer having an average particle size diameter less than about 1 mm.
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) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |