US4519965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal mold release agent for use in reaction injection molding
Assignee: Bayer Corp
•
Filing: 1984-08-23
•
Granted: 1985-05-28
•
Expires: 2004-08-23
Abstract
Abstract The present invention is directed to a process for the production of optionally cellular, polyurethane elastomer molding by reacting a reaction mixture containing (I) a polyisocyanate, (II) an isocyanate-reactive polymer having a molecular weight of about 1800 to 12,000, (III) about 5 to 50% by weight, based on the weight of component (II) of a chain extender comprising a sterically hindered aromatic diamine and (IV) an internal mold release agent mixture comprising (a) about 0.5 to 10% by weight, based on the weight of components (II) and (III) of a zinc carboxylate containing 8 to 24 carbon atoms per carboxylate group and (b) a compatibilizer comprising a member selected from the group consisting of nitrogen-containing, isocyanate-reactive, acyclic compounds and nitrogen-containing, isocyanate-reactive polymers 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, the reaction mixture being processed as a one-shot system by the RIM process at an isocyanate index of about 70 to 130.
Inventors
- 👤 Ronald P. Taylor
- 👤 Mark E. Cekoric
- 👤 John E. Dewhurst
- 👤 Saad M. Abouzahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:29
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/6505; C08G18/6523; C08G18/6529; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5024; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08G2120/00; C08G2125/00
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
172 words
A process for the production of optionally cellular, polyurethane elastomer moldings by reacting a reaction mixture comprising (I) a polyisocyanate, (II) an isocyanate-reactive polymer having a molecular weight of about 1800 to 12,000, (III) about 5 to 50% by weight, based on the weight of component (II) of a chain extender comprising a sterically hindered aromatic diamine and (IV) an internal mold release agent mixture comprising (a) about 0.5 to 10% by weight, based on the weight of components (II) and (III) of a zinc carboxylate containing 8 to 24 carbon atoms per carboxylate group and (b) a compatibilizer comprising a member selected from the group consisting of nitrogen-containing, isocyanate-reactive, acyclic compounds and nitrogen-containing, isocyanate-reactive polymers 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 at an isocyanate index of about 70 to 130.
Claim 2
Dependent Claim
172 words
A process for the production of optionally cellular, polyurethane elastomer moldings by reacting a reaction mixture comprising (I) a polyisocyanate, (II) an isocyanate-reactive polymer having a molecular weight of about 1800 to 12,000, (III) about 5 to 50% by weight, based on the weight of component (II) of a chain extender comprising a sterically hindered aromatic diamine and (IV) an internal mold release agent mixture comprising (a) about 0.5 to 10% by weight, based on the weight of components (II) and (III) of a zinc carboxylate containing 8 to 24 carbon atoms per carboxylate group and (b) a compatibilizer comprising a member selected from the group consisting of nitrogen-containing, isocyanate-reactive, acyclic compounds and nitrogen-containing, isocyanate-reactive polymers 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 at an isocyanate index of about 70 to 130.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said zinc carboxylate comprises zinc stearate.
Claim 4
Dependent Claim
35 words
The process of claim 1 wherein said chain extender comprises a member selected from the group consisting of 1-methyl-3,5-diethyl-2,4-diamino benzene, 1-methyl-3,5-diethyl-2,6-diamino benzene, 1,3,5-trimethyl-2,4-diamino benzene, 1,3,5-triethyl-2,4-diamino benzene, 3,5,3',5'tetraethyl-4,4'-diamino diphenylmethane, 3,5,3',5'-tetraisopropyl-4,4'-diamino diphenylmethane, 3,5-diethyl-3',5'-diisopropyl-4,4'-diamino diphenylmethane and 3,3'-diethyl-5,5'-diisopropyl-4,4'-diamino diphenylmethane.
Claim 5
Dependent Claim
19 words
The process of claim 1 wherein said chain extender comprises an isomeric mixture of 1-methyl-3,5-diethyl-2,4-diamino benzene and 1-methyl-3,5-diethyl-2,6-diamino benzene.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein said isocyanate-reactive polymer comprises a polyether polyol.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein said compatibilizer comprises a nitrogen-containing, isocyanate-reactive polyether.
Claim 8
Dependent Claim
20 words
The process of claim 1 wherein said compatibilizer comprises a mixture of an amine-terminated polyether and an amine-initiated polyether polyol.
Claim 9
Dependent Claim
22 words
The process of claim 7 wherein said amine-terminated polyether and said amine-initiated polyether polyol have molecular weights of up to about 800.
Claim 10
Dependent Claim
23 words
The process of claim 1 wherein said compatibilizer comprises an ethylene diamine-initiated polyether polyol having a molecular weight of up to about 800.
Claim 11
Dependent Claim
23 words
The process of claim 2 wherein said compatibilizer comprises an ethylene diamine-initiated polyether polyol having a molecular weight of up to about 800.
Claim 12
Dependent Claim
166 words
A process for the production of optionally cellular, polyurethane elastomer moldings by reacting a reaction mixture comprising (I) a polyisocyanate which is liquid at room temperature, (II) a polyether polyol having a molecular weight of about 3000 to 7000, (III) about 5 to 50% by weight, based on the weight of component (II) of a chain extender comprising a member selected from the group consisting of 1-methyl-3,5-diethyl-2,4-diamino benzene, 1-methyl-3,5-diethyl-2,6-diamino benzene and 1,3,5-triethyl-2,4-diamino benzene and (IV) an internal mold release agent mixture comprising (a) about 0.5 to 10% by weight, based on the weight of components (II) and (III) of zinc stearate and (b) a compatibilizer comprising a nitrogen-containing, isocyanate-reactive polyether in an amount sufficient to solubilize the zinc stearate so that when the internal mold release agent mixture is in admixture with components (II) and (III), the zinc stearate possesses improved resistance to precipitation, said reaction mixture being processed as a one-shot system by the RIM process at an isocyanate index of about 70 to 130.
Claim 13
Dependent Claim
166 words
A process for the production of optionally cellular, polyurethane elastomer moldings by reacting a reaction mixture comprising (I) a polyisocyanate which is liquid at room temperature, (II) a polyether polyol having a molecular weight of about 3000 to 7000, (III) about 5 to 50% by weight, based on the weight of component (II) of a chain extender comprising a member selected from the group consisting of 1-methyl-3,5-diethyl-2,4-diamino benzene, 1-methyl-3,5-diethyl-2,6-diamino benzene and 1,3,5-triethyl-2,4-diamino benzene and (IV) an internal mold release agent mixture comprising (a) about 0.5 to 10% by weight, based on the weight of components (II) and (III) of zinc stearate and (b) a compatibilizer comprising a nitrogen-containing, isocyanate-reactive polyether in an amount sufficient to solubilize the zinc stearate so that when the internal mold release agent mixture is in admixture with components (II) and (III), the zinc stearate possesses improved resistance to precipitation, said reaction mixture being processed as a one-shot system by the RIM process at an isocyanate index of about 70 to 130.
Claim 14
Dependent Claim
39 words
The process of claim 11 wherein said compatibilizer has a molecular weight of up to about 800 and is present in an amount of about 0.5 to 10% by weight, based on the weight of components (II) and (III).
Claim 15
Dependent Claim
14 words
The process of claim 11 wherein said compatibilizer comprises an ethylene diamine-initiated polyether polyol.
Claim 16
Dependent Claim
13 words
The process of claim 13 wherein said compatibilizer additionally comprises an amine-terminated polyether.
Claim 17
Dependent Claim
141 words
An isocyanate-reactive composition for use in a RIM process which comprises (II) an isocyanate-reactive polymer having a molecular weight of about 1800 to 12,000, (III) about 5 to 50% by weight, based on the weight of component (I) of a chain extender comprising a sterically hindered aromatic diamine and (IV) an internal mold release agent mixture comprising (a) about 0.5 to 10% by weight, based on the weight of components (II) and (III) of a zinc carboxylate containing 8 to 24 carbon atoms per carboxylate group and (b) a compatibilizer comprising a member selected from the group consisting of nitrogen-containing, isocyanate-reactive, acyclic compounds and nitrogen-containing, isocyanate-reactive polymers 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 18
Dependent Claim
141 words
An isocyanate-reactive composition for use in a RIM process which comprises (II) an isocyanate-reactive polymer having a molecular weight of about 1800 to 12,000, (III) about 5 to 50% by weight, based on the weight of component (I) of a chain extender comprising a sterically hindered aromatic diamine and (IV) an internal mold release agent mixture comprising (a) about 0.5 to 10% by weight, based on the weight of components (II) and (III) of a zinc carboxylate containing 8 to 24 carbon atoms per carboxylate group and (b) a compatibilizer comprising a member selected from the group consisting of nitrogen-containing, isocyanate-reactive, acyclic compounds and nitrogen-containing, isocyanate-reactive polymers 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 19
Dependent Claim
13 words
The molding composition of claim 15 wherein said zinc carboxylate comprises zinc stearate.
Claim 20
Dependent Claim
36 words
The molding composition of claim 15 wherein said chain extender comprises a member selected from the group consisting of 1-methyl-3,5-diethyl-2,4-diamino benzene, 1-methyl-3,5-diethyl-2,6-diamino benzene, 1,3,5-trimethyl-2,4-diamino benzene, 1,3,5-triethyl-2,4-diamino benzene, 3,5,3',5'-tetraethyl-4,4'-diamino diphenylmethane, 3,5,3',5'-tetraisopropyl-4,4'-diamino diphenylmethane, 3,5-diethyl-3',5'-diisopropyl-4,4'-diamino diphenylmethane and 3,3'-diethyl-5,5'-diisopropyl-4,4'-diamino diphenylmethane.
Claim 21
Dependent Claim
20 words
The isocyanate-reactive composition of claim 15 wherein said chain extender comprises an isomeric mixture of 1-methyl-3,5-diethyl-2,4-diamino benzene and 1-methyl-3,5-diethyl-2,6-diamino benzene.
Claim 22
Dependent Claim
14 words
The isocyanate-reactive composition of claim 15 wherein said isocyanate-reactive polymer comprises a polyether polyol.
Claim 23
Dependent Claim
14 words
The isocyanate-reactive composition of claim 15 wherein said compatibilizer comprises a nitrogen-containing, isocyanate-reactive polyether.
Claim 24
Dependent Claim
20 words
The isocyanate-reactive composition of claim 15 wherein said compatibilizer comprises a mixture of an amine-terminated polyether and an amine-initiated polyol.
Claim 25
Dependent Claim
23 words
The isocyanate-reactive composition of claim 21 wherein said amine-terminated polyether and said amine-initiated polyether polyol have molecular weights of up to about 800.
Claim 26
Dependent Claim
24 words
The isocyanate-reactive composition of claim 15 wherein said compatibilizer comprises an ethylene diamine-initiated polyether polyol having a molecular weight of up to about 800.
Claim 27
Dependent Claim
24 words
The isocyanate-reactive composition of claim 16 wherein said compatibilizer comprises an ethylene diamine-initiated polyether polyol having a molecular weight of up to about 800.
Claim 28
Dependent Claim
41 words
An internal mold release agent composition comprising (a) a zinc carboxylate containing 8 to 24 carbon atoms per carboxylate group and (b) a compatibilizer comprising a member selected from the group consisting of nitrogen-containing, isocyanate-reactive, acyclic compounds and nitrogen-containing, isocyanate-reactive polymers.
Claim 29
Dependent Claim
41 words
An internal mold release agent composition comprising (a) a zinc carboxylate containing 8 to 24 carbon atoms per carboxylate group and (b) a compatibilizer comprising a member selected from the group consisting of nitrogen-containing, isocyanate-reactive, acyclic compounds and nitrogen-containing, isocyanate-reactive polymers.
Claim 30
Dependent Claim
16 words
The internal mold release agent composition of claim 25 wherein said zinc carboxylate comprises zinc stearate.
Claim 31
Dependent Claim
33 words
The internal mold release agent composition of claim 25 wherein said zinc carboxylate is present in an amount of less than 50% by weight, based on the weight of components (a) and (b).
Claim 32
Dependent Claim
41 words
The internal mold release agent composition of claim 25 which additionally contains a chain extender comprising a member selected from the group consisting of 1-methyl-3,5-diethyl-2,4-diamino benzene, 1-methyl-3,5-diethyl-2,6-diamino benzene, 1,3,5-trimethyl-2,4-diamino benzene, 1,3,5-triethyl-2,4-diamino benzene, 3,5,3',5'-tetraethyl-4,4'-diamino diphenylmethane, 3,5,3',5'-tetraisopropyl-4,4'-diamino diphenylmethane, 3,5-diethyl-3',5'-diisopropyl-4,4'-diamino diphenylmethane and 3,3'-diethyl-5,5'-diisopropyl-4,4'-diamino diphenylmethane.
Claim 33
Dependent Claim
25 words
The internal mold release agent composition of claim 25 which additionally contains a chain extender comprising an isomer mixture of 1-methyl-3,5-diethyl-2,4-diamino benzene and 1-methyl-3,5-diethyl-2,6-diamino benzene.
Claim 34
Dependent Claim
17 words
The internal mold release agent composition of claim 25 wherein said compatibilizer comprises a nitrogen-containing, isocyanate-reactive polyether.
Claim 35
Dependent Claim
24 words
The internal mold release agent composition of claim 25 wherein said compatibilizer comprises a mixture of an amine-terminated polyether and an amine-initiated polyether polyol.
Claim 36
Dependent Claim
26 words
The internal mold release agent composition of claim 31 wherein said amine-terminated polyether and said amine-initiated polyether polyol having molecular weights of up to about 800.
Claim 37
Dependent Claim
23 words
The molding composition claim 25 wherein said compatibilizer comprises an ethylene diamine-initiated polyether polyol having a molecular weight of up to about 800.
Claim 38
Dependent Claim
24 words
The molding composition of claim 26 wherein said compatibilizer comprises an ethylene diamine-initiated polyether polyol having a molecular weight of up to about 800.
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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) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |