Patent US4895879A successfully refreshed from Google Patents.
US4895879A
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Internal mold release compositions
Assignee: Dow Chemical Co
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Filing: 1987-04-20
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Granted: 1990-01-23
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Expires: 2007-04-20
Abstract
Abstract Internal mold release compositions suitable for use in preparing polyurethane and polyurea moldings comprise a tertiary amine compound, a metal salt of a carboxylic acid, amidocarboxylic acid, phosphorus-containing acid or boron-containing acid. The metal is from Group IA, IB, IIA, or IIB metal or aluminum, chromium, molybdenum, iron, cobalt, nickel, tin, lead, antimony or bismuth.
Inventors
- 👤 Donald L. Nelson
- 👤 Roney J. Matijega
- 👤 Dennis P. Miller, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:10
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1825; C08K5/04; C08K5/09; C08K5/098; C08K5/16; C08K5/17; C08K5/20; C08K5/55; B29K; B29K2075/00; C08G2125/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
143 words
A process for the production of optionally cellular, polyurethane elastomer molding by reacting a reaction mixture comprising (I) a polyisocyanate, (II) an isocyanate-reactive polymer, (III) a chain extender comprising a sterically hindered aromatic diamine and (IV) an internal mold release agent mixture comprising (a) about 0.25 to 10% by weight, based on the weight of components (II) and (III) of a zinc carboxylate and (b) a compatibilizer comprising a member selected from the group consisting of isocyanate-reactive, acyclic compounds containing at least one tertiary nitrogen atom and isocyanate-reactive polymers containing at least one tertiary nitrogen atom in an amount sufficient to solubilize the zinc carboxylate so that when the internal mold release agent mixture is in admixture with components (II) and (III), the zinc carboxylate possesses improved resistance to precipitation, said reaction mixture being processed as a one-shot system by the RIM process.
Claim 2
Dependent Claim
143 words
A process for the production of optionally cellular, polyurethane elastomer molding by reacting a reaction mixture comprising (I) a polyisocyanate, (II) an isocyanate-reactive polymer, (III) a chain extender comprising a sterically hindered aromatic diamine and (IV) an internal mold release agent mixture comprising (a) about 0.25 to 10% by weight, based on the weight of components (II) and (III) of a zinc carboxylate and (b) a compatibilizer comprising a member selected from the group consisting of isocyanate-reactive, acyclic compounds containing at least one tertiary nitrogen atom and isocyanate-reactive polymers containing at least one tertiary nitrogen atom in an amount sufficient to solubilize the zinc carboxylate so that when the internal mold release agent mixture is in admixture with components (II) and (III), the zinc carboxylate possesses improved resistance to precipitation, said reaction mixture being processed as a one-shot system by the RIM process.
Claim 3
Dependent Claim
121 words
An isocyanate-reactive composition for use in a RIM process which comprises (I) an isocyanate-reactive polymer, (II) a chain extender comprising a sterically hindered aromatic diamine and (III) an internal mold release agent mixture comprising (a) about 0.25 to 10% by weight, based on the weight of components (II) and (III) of a zinc carboxylate and (b) a compatibilizer comprising a member selected from the group consisting of isocyanate-reactive, acyclic compounds containing at least one tertiary nitrogen atom and isocyanate-reactive polymers containing at least one tertiary nitrogen atom in an amount sufficient to solubilize the zinc carboxylate so that when the internal mold release agent mixture is in admixture with components (II) and (III), the zinc carboxylate possesses improved resistance to precipitation.
Claim 4
Dependent Claim
121 words
An isocyanate-reactive composition for use in a RIM process which comprises (I) an isocyanate-reactive polymer, (II) a chain extender comprising a sterically hindered aromatic diamine and (III) an internal mold release agent mixture comprising (a) about 0.25 to 10% by weight, based on the weight of components (II) and (III) of a zinc carboxylate and (b) a compatibilizer comprising a member selected from the group consisting of isocyanate-reactive, acyclic compounds containing at least one tertiary nitrogen atom and isocyanate-reactive polymers containing at least one tertiary nitrogen atom in an amount sufficient to solubilize the zinc carboxylate so that when the internal mold release agent mixture is in admixture with components (II) and (III), the zinc carboxylate possesses improved resistance to precipitation.
Claim 5
Dependent Claim
44 words
An internal mold release agent composition comprising (a) a zinc carboxylate and (b) a compatibilizer comprising a member selected from the groups consisting of isocyanate-reactive acyclic compounds containing at least one tertiary nitrogen atom and isocyanate-reactive polymer containing at least one tertiary nitrogen atom.
Claim 6
Dependent Claim
44 words
An internal mold release agent composition comprising (a) a zinc carboxylate and (b) a compatibilizer comprising a member selected from the groups consisting of isocyanate-reactive acyclic compounds containing at least one tertiary nitrogen atom and isocyanate-reactive polymer containing at least one tertiary nitrogen atom.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein said reaction mixture is substantially devoid of aliphatic amine hydrogens.
Claim 8
Dependent Claim
24 words
The process of claim 4 wherein component IV (b) contains at least two alkanol or hydroxy-terminated poly(oxyalkylene) groups attached to a tertiary nitrogen atom.
Claim 9
Dependent Claim
16 words
The process of claim 2 wherein said reaction mixture is substantially devoid of aliphatic amine hydrogens.
Claim 10
Dependent Claim
24 words
The process of claim 6 wherein component IV (b) contains at least two alkanol or hydroxy-terminated poly(oxyalkylene) groups attached to a tertiary nitrogen atom.
Claim 11
Dependent Claim
16 words
The process of claim 3 wherein said reaction mixture is substantially devoid of aliphatic amine hydrogens.
Claim 12
Dependent Claim
24 words
The process of claim 8 wherein component IV (b) contains at least two alkanol or hydroxy-terminated poly(oxyalkylene) groups attached to a tertiary nitrogen atom.
References Cited (Backward Citations)
US4585803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-22 | 1993-07-24 | 1994-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-22 | 1997-07-24 | 1998-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-22 | 2001-07-24 | 2002-01-23 | $7700.00 | Window Closed / Lapsed |