US4770827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing molded articles
Assignee: Air Products and Chemicals Pura GmbH and Co
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Filing: 1986-01-17
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Granted: 1988-09-13
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Expires: 2006-01-17
Abstract
Abstract A process for producing molded articles, especially molded polyurethane foam articles, wherein the mold is treated with an aqueous release agent or a concentrate of one or more release-active substances in organic solvent. The release agent is preheated, e.g. by an atomizer supplied with hot pressurized air, prior to being applied to the mold. The process enables the efficient use of water-base release agents and thus reduces the emission of harmful organic solvents into the atmosphere.
Inventors
- 👤 Wolfgang Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:46
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/02; B05B7/08; B05B7/0807; B05B7/0815; B29; B29C; B29C33/00; B29C33/56; B29C33/58; B29K; B29K2105/00; B29K2105/04; Y; Y10; Y10S; Y10S264/00; Y10S264/65
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
A process for producing a molded article, comprising: atomizing a release agent into a plurality of fine droplets by passing said agent through a nozzle means; warming said droplets, downstream of said nozzle means, with a hot, pressurized gas; directing said warmed droplets into a mold; introducing a moldable component into the mold; and molding said component.
Claim 2
Dependent Claim
57 words
A process for producing a molded article, comprising: atomizing a release agent into a plurality of fine droplets by passing said agent through a nozzle means; warming said droplets, downstream of said nozzle means, with a hot, pressurized gas; directing said warmed droplets into a mold; introducing a moldable component into the mold; and molding said component.
Claim 3
Dependent Claim
16 words
A process of claim 1 wherein the release agent is preheated prior to said atomizing step.
Claim 4
Dependent Claim
15 words
A process of claim 1 wherein said release agent is atomized via an airless system.
Claim 5
Dependent Claim
18 words
A process of claim 1 wherein said release agent is atomized under the influence of a pressurized gas.
Claim 6
Dependent Claim
10 words
A process of claim 1 wherein said gas is air.
Claim 7
Dependent Claim
16 words
A process of claim 1 wherein said gas is heated to at least about 80° C.
Claim 8
Dependent Claim
27 words
A process of claim 1 wherein said gas is heated to at least about 80° C. and said mold is preheated to at least about 25° C.
Claim 9
Dependent Claim
14 words
A process of claim 1 wherein the release agent contains water as a solvent.
Claim 10
Dependent Claim
47 words
In process for a producing polyurethane foam article, in which the article is produced by foaming in a mold having been sprayed with an atomized release agent, the improvement therewith comprising heating the atomized spray of said release agent with a hot, pressurized gas, subsequent to atomization.
Claim 11
Dependent Claim
47 words
In process for a producing polyurethane foam article, in which the article is produced by foaming in a mold having been sprayed with an atomized release agent, the improvement therewith comprising heating the atomized spray of said release agent with a hot, pressurized gas, subsequent to atomization.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |