Patent US3857799A successfully refreshed from Google Patents.
US3857799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the regeneration of plastics
Assignee: Fujifilm Holdings Corp
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Filing: 1972-02-25
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Granted: 1974-12-31
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Expires: 1992-02-25
Abstract
Abstract The process for regenerating waste plastics by mixing the waste plastics with an ether-type polyester and at least one member selected from the group consisting of a homopolymer of vinyl acetate, an ethylenevinyl acetate copolymer or a tacky polyolefin; and if necessary a foaming agent, and then molding the mixture into a desired shape.
Inventors
- 👤 S Ooba
- 👤 S Hirayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:03
CPC Classifications
B; B29; B29B; B29B17/00; B29B17/0026; C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
177 words
A PROCESS FOR REGENERATING WASTE PLASTIC MATERIAL COMPRISING: A. MIXING SAID WASTE PLASTIC MATERIAL WITH (1) A MODIFIED OLYESTER PREPARED BY HEATING POLYETHYLENE TEREPHTHALATE IN THE PRESENCE OF A GLYCOL TO SUBSTITUTE SAID GLYCOL FOR 30 TO 100 PERCENT OF THE REPEATING ETHHYLENE GLYCOL UNITS OF SAID POLYETHYLENE TEREPHTHALTE, SAID GLYCOL BEING SELECTED FROM THE GROUP CONSISTING OF POLYMETHYLENE GLYCOLS, POLYETHYLENE GLYCOLS, ALKYLENE GLYCOLS AND GLYCOLS REPRESENTED BY THE FORMULA HOCH2-X-CH2OH WHEREIN X IS AN ORGANIC GROUP HAVING AT LEAST ONE AROMATIC RING, WITH THE PROVISO THAT SAID GLYCOL IS NOT ETHYLENE GLYCOL, AND (2) AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF A VINYL ACETATE HOMOPOLYMER, AN ETHYLENE-VINYL ACETATE COPOLYMER AND A TACKY POLYOLEFIN SELECTED FROM THE GROUP CONSISTING OF A POLYOLEFIN HAVING A LOW POLYMERIZATION DEGREE AND ATATIC POLYPROPYLENE, THE AMOUNT OF COMPONENTS (1) AND (2), IN COMBINATION, BEING EFFECTIVE TO ADHERE SAID WASTE PLASTIC MATERIAL IN A MOLDABLE FORM; AND B. MOLDING THE RESULTING MIXTURE INTO THE DESIRED SHAPE; SAID PLATIC BEING SELECTED FROM THE GROUP CONSISTING OF THERMOPLASTIC AND THERMOSETTING RESINS.
Claim 2
Dependent Claim
177 words
A PROCESS FOR REGENERATING WASTE PLASTIC MATERIAL COMPRISING: A. MIXING SAID WASTE PLASTIC MATERIAL WITH (1) A MODIFIED OLYESTER PREPARED BY HEATING POLYETHYLENE TEREPHTHALATE IN THE PRESENCE OF A GLYCOL TO SUBSTITUTE SAID GLYCOL FOR 30 TO 100 PERCENT OF THE REPEATING ETHHYLENE GLYCOL UNITS OF SAID POLYETHYLENE TEREPHTHALTE, SAID GLYCOL BEING SELECTED FROM THE GROUP CONSISTING OF POLYMETHYLENE GLYCOLS, POLYETHYLENE GLYCOLS, ALKYLENE GLYCOLS AND GLYCOLS REPRESENTED BY THE FORMULA HOCH2-X-CH2OH WHEREIN X IS AN ORGANIC GROUP HAVING AT LEAST ONE AROMATIC RING, WITH THE PROVISO THAT SAID GLYCOL IS NOT ETHYLENE GLYCOL, AND (2) AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF A VINYL ACETATE HOMOPOLYMER, AN ETHYLENE-VINYL ACETATE COPOLYMER AND A TACKY POLYOLEFIN SELECTED FROM THE GROUP CONSISTING OF A POLYOLEFIN HAVING A LOW POLYMERIZATION DEGREE AND ATATIC POLYPROPYLENE, THE AMOUNT OF COMPONENTS (1) AND (2), IN COMBINATION, BEING EFFECTIVE TO ADHERE SAID WASTE PLASTIC MATERIAL IN A MOLDABLE FORM; AND B. MOLDING THE RESULTING MIXTURE INTO THE DESIRED SHAPE; SAID PLATIC BEING SELECTED FROM THE GROUP CONSISTING OF THERMOPLASTIC AND THERMOSETTING RESINS.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein said waste plastic material is crushed before said mixing step.
Claim 4
Dependent Claim
29 words
The process of claim 1 wherein said plastic is selected from the group consisting of polyethylene, polyvinyl chloride, polystyrene, polymethacrylates, urea resins, melamine resins, phenol resins and cellulose resins.
Claim 5
Dependent Claim
24 words
The process of claim 1 wherein said glycol is a polymethylene glycol represented by the formula HO(CH2)nOH wherein n varies from 3 to 20.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein said glycol is a polyethylene glycol represented by the formula HO(CH2CH2O)nOH wherein n varies from 2 to 100.
Claim 7
Dependent Claim
30 words
The process of claim 1 wherein said glycol is an alkylene glycol selected from the group consisting of propylene glycol, butylene glycol, neopentyl glycol, hexylene glycol, octylene glycol and cyclohexane-1,4-dimethanol.
Claim 8
Dependent Claim
14 words
The process of claim 1 wherein X is selected from the group consisting of
Claim 9
Dependent Claim
32 words
The process of claim 1 wherein said waste plastic material is mixed with a foaming agent in addition to said ether-type polyester (1) and said member (2) prior to said molding step.
Claim 10
Dependent Claim
17 words
The process of claim 8 wherein said waste plastic material is crushed prior to said mixing step.
Claim 11
Dependent Claim
29 words
The process of claim 8 wherein said plastic is selected from the group consisting of polyethylene, polyvinyl chloride, polystyrene, polymethacrylates, urea resins, melamine resins, phenol resins and cellulose resins.
Claim 12
Dependent Claim
12 words
The process of claim 1 wherein said plastic is a thermoplastic resin.
Claim 13
Dependent Claim
12 words
The process of claim 1 wherein said plastic is a thermosetting resin.
Claim 14
Dependent Claim
18 words
The process of claim 2 wherein said crushing is to render said waste plastic material into particulate form.
Claim 15
Dependent Claim
23 words
The process of claim 1 wherein the ratio of component to component (2), on a parts by weight basis, is 1:1/3 to 3.
Claim 16
Dependent Claim
31 words
The process of claim 1 wherein the ratio of component to component (2) expressed as the result of component (1)/component on a parts by weight basis is from 1/3 to 1.5.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |