US4314867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of molded bodies
Assignee: Metzeler Schaum GmbH
•
Filing: 1979-10-12
•
Granted: 1982-02-09
•
Expires: 1999-10-12
Abstract
Abstract Method for the manufacture of molded bodies, which includes heating a plate of thermo-plastic hard polyurethane foam, placing a reinforcing cover layer of UP-Prepreg on at least one side of the plate, and forming the heated body under pressure to a given shape during the hardening of the polyester in the cover layer.
Inventors
- 👤 Fritz Berger
- 👤 Udo Lauterbach
- 👤 Hermann Wetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:38
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B32; B32B; B32B5/00; B32B5/18; B29C51/00; B29C51/14; B29C51/145; B32B27/00; B32B27/06; B32B27/065; B32B27/10; B32B27/36; B29C51/08; B29C51/082; B29K; B29K2067/00; B29K2075/00; B29K2105/00; B29K2105/04; B29K2105/06; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2305/00; B32B2305/07; B32B2305/076; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
Method for the manufacture of molded bodies, which comprises heating a plate of thermo-plastic hard polyurethane foam, placing a reinforcing cover layer of UP-Prepreg or sheet molding compound on at least one side of the plate, and changing the form of the heated body under pressure to a different given shape during the hardening of the polyester in the cover layer.
Claim 2
Dependent Claim
61 words
Method for the manufacture of molded bodies, which comprises heating a plate of thermo-plastic hard polyurethane foam, placing a reinforcing cover layer of UP-Prepreg or sheet molding compound on at least one side of the plate, and changing the form of the heated body under pressure to a different given shape during the hardening of the polyester in the cover layer.
Claim 3
Dependent Claim
28 words
Method according to claim 1, wherein the UP-Prepreg of the cover layer has good flow properties and short hardening times at temperatures between 100° C. and 120° C.
Claim 4
Dependent Claim
47 words
Method according to claim 1 or 2 wherein the UP-Prepreg of the cover layer comprises 100 parts UP-resin having an acid number of 20-50, 1-7 parts MgO, 0.2-2 parts of a peroxide for triggering the hardening of the polyester therein, and 0.2-2 parts of a polymerization inhibitor.
Claim 5
Dependent Claim
27 words
Method according to claim 1 or 2 wherein the UP-Prepreg of the cover layer includes a thickening accelerator for shortening the curing time, and a zinc stearate.
Claim 6
Dependent Claim
52 words
Method according to claim 1, wherein the UP-Prepreg of the cover layer comprises 100 parts UP-resin V4336, 3 parts MgO, 1 part of peroxide P 1310, 0.5 parts of peroxide PERKADOX 16, 0.5 parts of polymerization inhibitor TBK solution 10 VH, 1 part of thickening accelerator V4131, and 2 parts zinc stearate.
Claim 7
Dependent Claim
26 words
Method according to claim 1, which includes placing a second reinforcing cover layer of UP-Prepreg on the opposite side of the plate from the first-mentioned side.
Claim 8
Dependent Claim
25 words
Method according to claim 1 or 6, wherein the step of forming under pressure includes forming the heated body with pre-heated tools of a press.
References Cited (Backward Citations)
US3062698A
Cited
US3674585A
Cited
US3829343A
Cited
US3801693A
Cited
US3873654A
Cited
US3998683A
Cited
US4188428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |