US3925527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making foamed urethane resins having improved mold release properties
Assignee: Bayer AG
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Filing: 1974-01-30
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Granted: 1975-12-09
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Expires: 1994-01-30
Abstract
Abstract A reaction product of a fatty acid ester and an organic monoisocyanate is included in a foamable reaction mixture containing an organic polyisocyanate to provide a molded product which can be removed from a mold whose surface has not been coated with conventional mold release agents.
Inventors
- 👤 Helmut Kleimann
- 👤 Bonin Wulf Von
- 👤 Heinz-Georg Schneider
- 👤 Herbert Gebauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:44
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/36; C08G18/70; C08G18/71; C08G18/72; C08G18/80; C08G2110/00; C08G2110/0033; C08J2375/00; C08J2375/04; C08J2475/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
IN A PROCESS FOR MOLDING FOAM PRODUCTS WHEREIN A FOAMABLE REACTION MIXTURE CONTAINING AN ORGANIC POLYSIOCYANATE IS REATED IN A CLOSED MOLD, SAID FOAMABLE REACTION MIXTURE BEING ADAPTED TO EXPAND AND FILL THE MOLD WHILE CLOSED, THE IMPRVEMENT WHICH COMPRISES INCLUDING IN THE FOAMABLE REACTION MIXTURE AS A MOLD RELAESE AGENT A PREFORMED REACTION PRODUCT OF AN ACTIVE HYDROGEN CONTAINING FATTY ACID ESTER AND AN ORGANIC MONOISOCYANATE, SAID REACTION PRODUCT BEING SOLUBLE IN SAID ORGANIC POLYSIOCYANATE.
Claim 2
Dependent Claim
76 words
IN A PROCESS FOR MOLDING FOAM PRODUCTS WHEREIN A FOAMABLE REACTION MIXTURE CONTAINING AN ORGANIC POLYSIOCYANATE IS REATED IN A CLOSED MOLD, SAID FOAMABLE REACTION MIXTURE BEING ADAPTED TO EXPAND AND FILL THE MOLD WHILE CLOSED, THE IMPRVEMENT WHICH COMPRISES INCLUDING IN THE FOAMABLE REACTION MIXTURE AS A MOLD RELAESE AGENT A PREFORMED REACTION PRODUCT OF AN ACTIVE HYDROGEN CONTAINING FATTY ACID ESTER AND AN ORGANIC MONOISOCYANATE, SAID REACTION PRODUCT BEING SOLUBLE IN SAID ORGANIC POLYSIOCYANATE.
Claim 3
Dependent Claim
41 words
The process of claim 1 wherein the foamable reaction mixture contains a blowing agent, an organic compound having reactive hydrogen atoms and a molecular weight of 62 to about 10,000 and the said reaction product contains 5 to 50 carbon atoms.
Claim 4
Dependent Claim
65 words
The process of claim 2 wherein the said fatty acid ester is an ester of an aliphatic fatty acid having more than 8 carbon atoms, said ester having an acid number of 0 to 100 and a hydroxyl number of 0 to 150 with at least one of the said numbers being greater than 0 and an average molecular weight of between 500 to 5000.
Claim 5
Dependent Claim
38 words
The process of claim 2 wherein the fatty acid ester is an ester of (a) oleic acid, tall oil fatty acid, or a co-condensate of one of said acids and a dicarboxylic acid, and (b) a polyhydric alcohol.
Claim 6
Dependent Claim
50 words
The process of claim 2 wherein the fatty acid ester is an ester of oleic acid, adipic acid and pentaerythritol having an acid number of about 3 to about 30, a hyroxyl number of about 30 to about 70 and an average molecular weight of about 900 to about 2500.
Claim 7
Dependent Claim
24 words
The process of claim 1 wherein the fatty acid ester is a ricinoleic acid polyester having a molecular weight of between 800 and 2500.
Claim 8
Dependent Claim
43 words
The process of claim 1 wherein the said reaction product has been prepared by reacting a mixture of 1 to 55% by weight of fatty acid ester with 99 to 45% by weight of organic monoisocyanate at a temperature between 30* and 200*C.
Claim 9
Dependent Claim
36 words
The process of claim 1 wherein the said reaction product is prepared from a fatty acid ester and a monoisocyanate prepared by reacting a diisocyanate with one-half of its stoichiometric equivalent of an organic monohydroxyl compound.
Claim 10
Dependent Claim
22 words
The process of claim 1 wherein the foamable reaction mixture contains a mixture of mold release agents including the said reaction product.
Claim 11
Dependent Claim
41 words
The process of claim 9 wherein the mixture of mold release agents contains an oleic acid or tall oil fatty acid salt of the amide-containing amine which is the reaction product of N-dimethylaminopropYlamine and oleic acid or tall oil fatty acid.
Claim 12
Dependent Claim
74 words
THE PROCESS OF IMPROVING THE MOLD RELEASE PROPERTIES OF A MOLDED PRODUCT OBTAINED BY REACTING AND SHAPING A FOAMABLE REACTION MIXTURE CONTAINING AN ORGANIC POLYISOCYANATE IN A CLOSED MOLD WHICH COMPRISES INCLUDING AS A MOLD RELEASE AGENT AN EFFECTIVE AMOUNT OF THE PREFORMED REACTION PRODUCT OF AN ACTIVE HYDROGEN CONTAINING FATTY ACID ESTER AND AN EXCESS OF AN ORGANIC MONOISOCYANATE IN THE FOAMABLE REACTION MIXTURE, SAID REACTION PRODUCT BEING SOLUBLE IN THE ORGANIC POLYISOCYANATE.
Claim 13
Dependent Claim
74 words
THE PROCESS OF IMPROVING THE MOLD RELEASE PROPERTIES OF A MOLDED PRODUCT OBTAINED BY REACTING AND SHAPING A FOAMABLE REACTION MIXTURE CONTAINING AN ORGANIC POLYISOCYANATE IN A CLOSED MOLD WHICH COMPRISES INCLUDING AS A MOLD RELEASE AGENT AN EFFECTIVE AMOUNT OF THE PREFORMED REACTION PRODUCT OF AN ACTIVE HYDROGEN CONTAINING FATTY ACID ESTER AND AN EXCESS OF AN ORGANIC MONOISOCYANATE IN THE FOAMABLE REACTION MIXTURE, SAID REACTION PRODUCT BEING SOLUBLE IN THE ORGANIC POLYISOCYANATE.
Claim 14
Dependent Claim
20 words
The process of claim 1 wherein the monoisocyanate is benzyl isocyanate, phenyl isocyanate, tolyl isocyanate, cyclohexyl isocyanate or stearyl isocyanate.
Claim 15
Dependent Claim
28 words
The process of claim 1 wherein said reaction product is present in an amount from 0.5 to 35% by weight, based on the amount of organic polyisocyanate present.
Claim 16
Dependent Claim
28 words
The process of claim 11, wherein said reaction product is present in an amount from 0.5 to 35% by weight, based on the amount of organic polyisocyanate present.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |