US4250222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing finished and semi-finished products from mixtures of various synthetic resin scrap materials
Assignee: Institut de Recherches Chimiques et Biologiques Appliquees SARL IRCEBA
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Filing: 1975-12-29
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Granted: 1981-02-10
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Expires: 1995-12-29
Abstract
Abstract A process is disclosed for manufacturing finished and semi-finished articles from mixtures of normally incompatible synthetic resin scrap materials. The process comprises coarsely grinding thermoplastic scrap materials containing two or more mutually incompatible thermoplastic resins and possibly up to 25 parts % by weight of foreign materials, incorporating into the coarsely ground thermoplastic resin mixture through the application of heat, pressure, or a sequential or simultaneous application of heat and pressure, from about 5 to about 25 parts by weight of a fibrous material, the individual fibers in said fibrous material having an average length equal to at least three times the average size of the fragments constituting the coarsely ground thermoplastic resin mixture, and finally, forming the resin/fiber mass into finished or semi-finished article employing known and conventional techniques.
Inventors
- 👤 Gerard F. G. Mavel
- 👤 Emile M. J. Morel
- 👤 Gabriel M. Richert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:35
CPC Classifications
B; B29; B29B; B29B17/00; B29B17/0026; B29B17/0042; B29B17/04; B29B17/0412; C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2025/00; B29K2027/00; B29K2027/06; B29K2105/00; B29K2105/06; B29L; B29L2031/00; B29L2031/56; B29L2031/565; B29L2031/712; B29L2031/7158; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2861; Y10T442/2893; Y10T442/2926; Y10T442/2984; Y10T442/2992
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
A process for compatibilizing mixed mutually incompatible thermoplastic synthetic resins which comprises: (a) coarsely grinding a mixture of mutually incompatible thermoplastic resin scraps; (b) incorporating into the coarsely ground mixture of incompatible thermoplastic resin scraps through the application of heat and pressure (i) from 5 to about 25 parts % by weight of a fibrous material, the individual fibers in said fibrous material having an average length equal to at least three times the average size of the fragments constituting the coarsely ground thermoplastic resin mixture, and when special characteristics are sought, (ii) from 0 to about 20 parts % by weight of a non fibrous convenient additive, and (c) forming the resin/fiber mass into finished or semifinished articles.
Claim 2
Dependent Claim
119 words
A process for compatibilizing mixed mutually incompatible thermoplastic synthetic resins which comprises: (a) coarsely grinding a mixture of mutually incompatible thermoplastic resin scraps; (b) incorporating into the coarsely ground mixture of incompatible thermoplastic resin scraps through the application of heat and pressure (i) from 5 to about 25 parts % by weight of a fibrous material, the individual fibers in said fibrous material having an average length equal to at least three times the average size of the fragments constituting the coarsely ground thermoplastic resin mixture, and when special characteristics are sought, (ii) from 0 to about 20 parts % by weight of a non fibrous convenient additive, and (c) forming the resin/fiber mass into finished or semifinished articles.
Claim 3
Dependent Claim
20 words
The process of claim 1 in which each of the mutually incompatible thermoplastic scrap resins is a chemically different polymer.
Claim 4
Dependent Claim
36 words
The process of claim 1 in which each of the mutually incompatible thermoplastic scrap resins is a chemically identical polymer but differs in the nature and quantity of other materials originally contained in the resin formulation.
Claim 5
Dependent Claim
20 words
The process of claim 3 in which each of the mutually incompatible thermoplastic scrap resins is a polyvinylchloride based resin.
Claim 6
Dependent Claim
33 words
The process of claim 1 in which the mixture of incompatible thermoplastic resin scraps is ground to an average fragment size in the range of from about 1 mm to about 4 mm.
Claim 7
Dependent Claim
29 words
The process of claim 1 in which the fibrous material is a mat, sheet, strip or individual fiber of glass, asbestos, silica, cotton, linen, wool, cellulose, polyester or polyamide.
Claim 8
Dependent Claim
58 words
The process of claim 6 in which about 15 to 20 parts % by weight of a fibrous material comprising a glass mat wherein the average length of the individual glass fibers in said mat is greater than 50 mm is incorporated into a coarsely ground mixture of incompatible thermoplastic resin scraps passing through a 4 mm screen.
Claim 9
Dependent Claim
24 words
The process of claim 1 in which the mutually incompatible thermoplastic synthetic resins contain up to 25 parts % by weight of extraneous materials.
Claim 10
Dependent Claim
25 words
The process of claim 8 in which the extraneous materials are removed from the mutually incompatible thermoplastic synthetic resins prior to the grinding step (a).
Claim 11
Dependent Claim
11 words
A thermoplastic resin article produced by the process of claim 1.
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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |