US4797320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite plastic moldings and a process for their production
Assignee: Bayer AG
•
Filing: 1988-01-04
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Granted: 1989-01-10
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Expires: 2008-01-04
Abstract
Abstract A composite plastic molding made up of a plastic foam and having a polyurethane skin is made by heating a reactive one-component system to form a polyurethane skin and then joining the polyurethane skin to the plastic foam. The one-component system is composed of a finely divided polyisocyanate in which from 0.1 to 25 equivalent percent of the isocyanate groups have been deactivated, a polyamine and/or polyol having a molecular weight of from 400 to 8000 and optionally a chain extending agent, a catalyst and known auxiliaries and additives.
Inventors
- 👤 Richard Kopp
- 👤 Gerhard Grogler
- 👤 Heinrich Hess
- 👤 Hermann Schafer
- 👤 Werner Rasshofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8038; C08G18/703; C08G18/705; C08G18/707; C08G18/8054; C08G18/8058; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249987; Y10T428/249988; Y10T428/249991; Y10T428/31504; Y10T428/31551; Y10T428/31554
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
72 words
A composite plastic molding made up of a plastic foam having a polyurethane skin produced by heating a reactive one-component system composed of (a) a finely divided polyisocyanate in which from 0.1 to 25 equivalent percent of the isocyanate groups have been deactivated and (b) a polyamine and/or polyol having a molecular weight of from 400 to 8000 to form the polyurethane skin and joining the plastic foam to the polyurethane skin.
Claim 2
Dependent Claim
72 words
A composite plastic molding made up of a plastic foam having a polyurethane skin produced by heating a reactive one-component system composed of (a) a finely divided polyisocyanate in which from 0.1 to 25 equivalent percent of the isocyanate groups have been deactivated and (b) a polyamine and/or polyol having a molecular weight of from 400 to 8000 to form the polyurethane skin and joining the plastic foam to the polyurethane skin.
Claim 3
Dependent Claim
28 words
The molding of claim 1 in which the isocyanate groups of the polyisocyanate have been deactivated by reaction with a polyamine, hydrazine, alkyl hydrazine, hydrazide, amidine and/or guanidine.
Claim 4
Dependent Claim
52 words
The molding of claim 1 in which the one-component system further includes (c) a chain extending agent selected from aromatic polyamines having molecular weights of from 108 to 399, aliphatic polyols having molecular weights of from 62 to 399, cycloaliphatic polyols having molecular weights of from 62 to 399 and mixtures thereof.
Claim 5
Dependent Claim
15 words
The molding of claim 3 in which the one-component system further includes (d) a catalyst.
Claim 6
Dependent Claim
15 words
The molding of claim 1 in which the one-component system further includes (d) a catalyst.
Claim 7
Dependent Claim
14 words
The molding of claim 1 in which the plastic foam is a polyurethane foam.
Claim 8
Dependent Claim
12 words
The molding of claim 1 in which the polyurethane skin is foamed.
Claim 9
Dependent Claim
76 words
A process for the production of a composite plastic molding composed of a plastic foam and a polyurethane skin comprising (1) thermally hardening a reactive one-component polyurethane system composed of (a) a finely divided polyisocyanate in which from 0.1 to 25 equivalent percent of the isocyanate groups have been deactivated and (b) a polyamine and/or polyol having a molecular weight of from 400 to 8000 and (2) joining the product of (1) to the plastic foam.
Claim 10
Dependent Claim
76 words
A process for the production of a composite plastic molding composed of a plastic foam and a polyurethane skin comprising (1) thermally hardening a reactive one-component polyurethane system composed of (a) a finely divided polyisocyanate in which from 0.1 to 25 equivalent percent of the isocyanate groups have been deactivated and (b) a polyamine and/or polyol having a molecular weight of from 400 to 8000 and (2) joining the product of (1) to the plastic foam.
Claim 11
Dependent Claim
28 words
The process of claim 8 in which the isocyanate groups of the polyisocyanate have been deactivated by reaction with a polyamine, hydrazine, alkyl hydrazine, hydrazide, amidine and/or guanidine.
Claim 12
Dependent Claim
52 words
The process of claim 8 in which the one-component system further includes (c) a chain extending agent selected from aromatic polyamines having molecular weights of from 108 to 399, aliphatic polyols having molecular weights of from 62 to 399, cycloaliphatic polyols having molecular weights of from 62 to 399, and mixtures thereof.
Claim 13
Dependent Claim
15 words
The process of claim 10 in which the one-component system further includes (d) a catalyst.
Claim 14
Dependent Claim
15 words
The process of claim 8 in which the one-component system further includes (d) a catalyst.
Claim 15
Dependent Claim
14 words
The process of claim 8 in which the plastic foam is a polyurethane foam.
Claim 16
Dependent Claim
12 words
The process of claim 8 in which the polyurethane skin is foamed.
Claim 17
Dependent Claim
26 words
The process of claim 8 in which the polyurethane skin is formed on the inner wall of a mold and then back-foamed with the plastic foam.
Claim 18
Dependent Claim
39 words
The process of claim 15 in which the polyurethane skin is removed from the inner wall of the mold in which it was formed and introduced into a second mold in which it is back-foamed with the plastic foam.
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) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |