Patent US4053537A successfully refreshed from Google Patents.
US4053537A
Expired / Lapsed
US
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Process for the production of elastic composites
Assignee: Bayer AG
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Filing: 1975-11-06
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Granted: 1977-10-11
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Expires: 1995-11-06
Abstract
Abstract This invention relates to a process for the production of elastic composites, preferably used as floor coverings, from plastics granulates and polyisocyanates acting as binders. The process broadly comprises coating the plastic granulates with a paste of hydroxyl containing polyether, filler, and optionally pigment, subsequently mixing the coated granulates with the polyisocyanate binder, and thereafter molding and curing the resultant composite.
Inventors
- 👤 Hans Dieter Ruprecht
- 👤 Paul Henrichs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:09
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0057; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/48; C08J; C08J3/00; E; E01; E01C; E01C7/00; E01C7/08; E01C7/30; B29L; B29L2031/00; B29L2031/30; B29L2031/3005; B29L2031/3017
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
45 words
A process for the production of an elastic composite comprising: a. coating rubber and/or elastomeric plastic granulates with a paste of i. a hydroxyl containing polyether and ii. mineral fillers and/or pigments, b. subsequently mixing a polyisocyanate binder therewith, and c. hardening the resultant mixture.
Claim 2
Dependent Claim
45 words
A process for the production of an elastic composite comprising: a. coating rubber and/or elastomeric plastic granulates with a paste of i. a hydroxyl containing polyether and ii. mineral fillers and/or pigments, b. subsequently mixing a polyisocyanate binder therewith, and c. hardening the resultant mixture.
Claim 3
Dependent Claim
43 words
The process of claim 1, wherein the polyisocyanate binder is a mixture of prepolymers containing isocyanate groups and isocyanates free from urethane groups, said mixture obtained by reacting polyisocyanates with polyhydroxy polyether in a NCO to OH ratio of from 2:1 to 15:1.
Claim 4
Dependent Claim
14 words
The process of claim 2, wherein diphenylmethane diisocyanate is used as the isocyanate component.
Claim 5
Dependent Claim
33 words
The process of claim 1, wherein 1 to 20 parts by weight of said paste and 10 to 70 parts by weight of binder are used per 100 parts by weight of granulates.
Claim 6
Dependent Claim
33 words
The process of claim 1, wherein 3 to 10 parts by weight of said paste and 20 to 50 parts by weight of binder are used per 100 parts by weight of granulates.
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) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |