Patent US3864432A successfully refreshed from Google Patents.
US3864432A
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US
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Process for the production of an elasticized thermoplastic polymer mixture in a pourable powder form
Assignee: Wacker Chemie AG
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Filing: 1972-11-22
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Granted: 1975-02-04
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Expires: 1992-11-22
Abstract
Abstract A process for the production of an elastomer treated thermoplastic polymer in a pourable powder form consisting essentially of adding an aqueous elastomeric resin dispersion to a thermoplastic polymer powder, mixing the two components under high sheer agitation at below the gelling temperature of said thermoplastic powder for a time sufficient to obtain a homogeneous distribution of the elastomeric resin on said thermoplastic powder and recovering said elastomer treated thermoplastic polymer in a pourable powder form.
Inventors
- 👤 Klaus Adler
- 👤 Johann Bauer
- 👤 Rupert Englbrecht
- 👤 Werner Turba
- 👤 Englbert Pichler
- 👤 Adolf Maluschka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:27
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/005; Y; Y10; Y10S; Y10S525/00; Y10S525/934
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
133 words
A PROCESS FOR THE PRODUCTION OF AN ELASTOMER TREATED THERMOPLASTIC POLYMER IN A POURABLE POWDER FORM CONISTING ESSENTIALLY OF ADDING A MAXIMUM OF 50 PARTS OF AN AQUEOUS ELASTOMERIC ETHYLENE/VINYL ACETATE COPOLYMER DISPERSION TO 100 PARTS OF A THEROMPLASTIC POLYMER POWDER IN SUCH AN AMOUNT THAT NOT MORE THAN 25 PARTS BY WEIGHT OF WATER IN SAID AQUEOUS DISPERSION ARE PRESENT PER 100 PARTS BY WEIGHT OF SAID THERMOPLASTIC POLYMER POWDER, MIXING THE TWO COMPONENTS UNDER HIGH SHEER AGITATION AT AGITATION SPEEDS OF FROM 1,000 TO 3,000 RPM, AT BELOW THE GELLING TEMPERATURE OF SAID THERMOPLASTIC POWDER FOR A TIME SUFFICIENT TO OBTAIN A HOMOGENEOUS DISTRIBUTION OF THE ELASTOMERIC RESIN ON SAID THERMOPLASTIC POWDER AND TO OBTAIN A SUBSTANTIALLY ANHYDROUS POWDER, AND RECOVERING SAID ELASTOMER TREATED THERMOPLASTIC POLYMER IN A POURABLE POWDER FORM.
Claim 2
Dependent Claim
133 words
A PROCESS FOR THE PRODUCTION OF AN ELASTOMER TREATED THERMOPLASTIC POLYMER IN A POURABLE POWDER FORM CONISTING ESSENTIALLY OF ADDING A MAXIMUM OF 50 PARTS OF AN AQUEOUS ELASTOMERIC ETHYLENE/VINYL ACETATE COPOLYMER DISPERSION TO 100 PARTS OF A THEROMPLASTIC POLYMER POWDER IN SUCH AN AMOUNT THAT NOT MORE THAN 25 PARTS BY WEIGHT OF WATER IN SAID AQUEOUS DISPERSION ARE PRESENT PER 100 PARTS BY WEIGHT OF SAID THERMOPLASTIC POLYMER POWDER, MIXING THE TWO COMPONENTS UNDER HIGH SHEER AGITATION AT AGITATION SPEEDS OF FROM 1,000 TO 3,000 RPM, AT BELOW THE GELLING TEMPERATURE OF SAID THERMOPLASTIC POWDER FOR A TIME SUFFICIENT TO OBTAIN A HOMOGENEOUS DISTRIBUTION OF THE ELASTOMERIC RESIN ON SAID THERMOPLASTIC POWDER AND TO OBTAIN A SUBSTANTIALLY ANHYDROUS POWDER, AND RECOVERING SAID ELASTOMER TREATED THERMOPLASTIC POLYMER IN A POURABLE POWDER FORM.
Claim 3
Dependent Claim
35 words
The process of claim 1 wherein said thermoplastic polymer powder is a powder of a thermoplastic polymer selected from the group consisting of polyvinyl chloride, polyvinyl chloride copolymers, polyethylene, polyethylene copolymers, polypropylene, polyamides and polyesters.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein said ethylene/vinyl acetate copolymer has a vinyl acetate content of from 40 to 75 percent.
Claim 5
Dependent Claim
35 words
The process of claim 1 wherein said high speed agitation is conducted with mixing blades having a circumferential velocity at the tip of said mixing blade of from 10 m to 40 m per second.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |