Patent US4444703A successfully refreshed from Google Patents.
US4444703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced reaction injection molded elastomers
Assignee: Huntsman Corp
•
Filing: 1982-03-08
•
Granted: 1984-04-24
•
Expires: 2002-03-08
Abstract
Abstract A method of improving the physical properties of high density reinforced reaction injection molded microcellular or solid elastomers is disclosed. The method involves placing an inert filler material wholly in the isocyanate component of a two component reaction system where the other component contains predominantly polyol before mixing the components to effect reaction. This modification will result in an improvement in tensile strength and thermal dimensional stability when compared to placing the inert filler material in the polyol component before reaction.
Inventors
- 👤 Richard J. G. Dominguez
- 👤 Doris M. Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:44
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0838; C08K; C08K3/00; C08K3/01; C08K3/013; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
81 words
In a method for making inert filler reinforced reaction injection molded polyurethane elastomers of at least 53 pounds per cubic foot average density and ranging from about 0.05 to 0.25 inches in thickness wherein two streams are reacted with one another, one stream containing polyisocyanate and the other stream containing active hydrogen containing materials, the improvement which comprises placing all of an inert filler material in the isocyanate containing stream prior to mixing and reaction with the active hydrogen containing stream.
Claim 2
Dependent Claim
81 words
In a method for making inert filler reinforced reaction injection molded polyurethane elastomers of at least 53 pounds per cubic foot average density and ranging from about 0.05 to 0.25 inches in thickness wherein two streams are reacted with one another, one stream containing polyisocyanate and the other stream containing active hydrogen containing materials, the improvement which comprises placing all of an inert filler material in the isocyanate containing stream prior to mixing and reaction with the active hydrogen containing stream.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the active hydrogen containing materials are polyols.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein the polyols are polyether polyols based on trihydric initiators having hydroxyl numbers ranging from about 56 to about 24.
Claim 5
Dependent Claim
11 words
The method of claim 1 wherein the polyisocyanate is methylene bis(4-phenylisocyanate).
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein the inert filler material comprises glass.
Claim 7
Dependent Claim
72 words
In a method for making glass fiber reinforced reaction injection molded polyurethane elastomers of at least 53 pounds per cubic foot average density and ranging from about 0.05 to 0.25 inches in thickness wherein a polyether polyol containing stream is reacted with a methylene bis(4-phenylisocyanate) containing stream, the improvement which comprises placing all of the glass fiber in the methylene bis(4-phenylisocyanate) containing stream prior to reaction with the polyether polyol containing stream.
Claim 8
Dependent Claim
72 words
In a method for making glass fiber reinforced reaction injection molded polyurethane elastomers of at least 53 pounds per cubic foot average density and ranging from about 0.05 to 0.25 inches in thickness wherein a polyether polyol containing stream is reacted with a methylene bis(4-phenylisocyanate) containing stream, the improvement which comprises placing all of the glass fiber in the methylene bis(4-phenylisocyanate) containing stream prior to reaction with the polyether polyol containing stream.
Claim 9
Dependent Claim
19 words
The method of claim 6 wherein the polyol is about 5500 molecular weight and based on a trihydric initiator.
Claim 10
Dependent Claim
92 words
In a method for making inert filler reinforced reaction injection molded microcellular polyurethane elastomers of from about 53 to 97 pounds per cubic foot average density and ranging from about 0.05 to 0.25 inches in thickness wherein two streams are reacted with one another, one stream containing polyisocyanate and the other stream containing active hydrogen containing materials and a minor amount of a blowing agent, the improvement which comprises placing all of an inert filler material in the isocyanate containing stream prior to mixing and reaction with the active hydrogen containing stream.
Claim 11
Dependent Claim
92 words
In a method for making inert filler reinforced reaction injection molded microcellular polyurethane elastomers of from about 53 to 97 pounds per cubic foot average density and ranging from about 0.05 to 0.25 inches in thickness wherein two streams are reacted with one another, one stream containing polyisocyanate and the other stream containing active hydrogen containing materials and a minor amount of a blowing agent, the improvement which comprises placing all of an inert filler material in the isocyanate containing stream prior to mixing and reaction with the active hydrogen containing stream.
Claim 12
Dependent Claim
13 words
The method of claim 8 wherein the active hydrogen containing materials are polyols.
Claim 13
Dependent Claim
25 words
The method of claim 8 wherein the polyols are polyether polyols based on trihydric initiators having hydroxyl numbers ranging from about 56 to about 24.
Claim 14
Dependent Claim
11 words
The method of claim 8 wherein the polyisocyanate is methylene bis(4-phenylisocyanate).
Claim 15
Dependent Claim
12 words
The method of claim 8 wherein the inert filler material comprises glass.
Claim 16
Dependent Claim
85 words
In a method for making glass fiber reinforced reaction injection molded microcellular polyurethane elastomers of from about 53 to 97 pounds per cubic foot average density and ranging from about 0.05 to 0.25 inches in thickness wherein a polyether polyol containing stream also containing a minor amount of a blowing agent is reacted with a methylene bis(4-phenyl isocyanate) containing stream, the improvement which comprises placing all of the glass fiber in the methylene bis(4-phenylisocyanate) containing stream prior to reaction with the polyether polyol containing stream.
Claim 17
Dependent Claim
85 words
In a method for making glass fiber reinforced reaction injection molded microcellular polyurethane elastomers of from about 53 to 97 pounds per cubic foot average density and ranging from about 0.05 to 0.25 inches in thickness wherein a polyether polyol containing stream also containing a minor amount of a blowing agent is reacted with a methylene bis(4-phenyl isocyanate) containing stream, the improvement which comprises placing all of the glass fiber in the methylene bis(4-phenylisocyanate) containing stream prior to reaction with the polyether polyol containing stream.
Claim 18
Dependent Claim
19 words
The method of claim 13 wherein the polyol is about 5500 molecular weight and based on a trihydric initiator.
Claim 19
Dependent Claim
83 words
In a method for making inert filler reinforced reaction injection molded solid polyurethane elastomers of from about 70 to 100 pounds per cubic foot density and ranging from about 0.05 to 0.25 inches in thickness wherein two streams are reacted with one another, one stream containing polyisocyanate and the other stream containing active hydrogen containing materials, the improvement which comprises placing all of an inert filler material in the isocyanate containing stream prior to mixing and reaction with the active hydrogen containing stream.
Claim 20
Dependent Claim
83 words
In a method for making inert filler reinforced reaction injection molded solid polyurethane elastomers of from about 70 to 100 pounds per cubic foot density and ranging from about 0.05 to 0.25 inches in thickness wherein two streams are reacted with one another, one stream containing polyisocyanate and the other stream containing active hydrogen containing materials, the improvement which comprises placing all of an inert filler material in the isocyanate containing stream prior to mixing and reaction with the active hydrogen containing stream.
Claim 21
Dependent Claim
13 words
The method of claim 15 wherein the active hydrogen containing materials are polyols.
Claim 22
Dependent Claim
24 words
The method of claim 15 wherein the polyols are polyether polyols based on trihydric initiators having hydroxyl numbers ranging from about 56 to 24.
Claim 23
Dependent Claim
11 words
The method of claim 15 wherein the polyisocyanate is methylene bis(4-phenylisocyanate).
Claim 24
Dependent Claim
12 words
The method of claim 15 wherein the inert filler material comprises glass.
Claim 25
Dependent Claim
74 words
In a method for making glass fiber reinforced reaction injection molded solid polyurethane elastomers of from about 70 to 100 pounds per cubic foot density and ranging from about 0.05 to 0.25 inches in thickness wherein a polyether polyol containing stream is reacted with a methylene bis(4-phenylisocyanate) containing stream, the improvement which comprises placing all of the glass fiber in the methylene bis(4-phenylisocyanate) containing stream prior to reaction with the polyether polyol containing stream.
Claim 26
Dependent Claim
74 words
In a method for making glass fiber reinforced reaction injection molded solid polyurethane elastomers of from about 70 to 100 pounds per cubic foot density and ranging from about 0.05 to 0.25 inches in thickness wherein a polyether polyol containing stream is reacted with a methylene bis(4-phenylisocyanate) containing stream, the improvement which comprises placing all of the glass fiber in the methylene bis(4-phenylisocyanate) containing stream prior to reaction with the polyether polyol containing stream.
Claim 27
Dependent Claim
19 words
The method of claim 20 wherein the polyol is about 5500 molecular weight and based on a trihydric initiator.
References Cited (Backward Citations)
US2683730A
Cited
US3012008A
Cited
US2950263A
Cited
US3194773A
Cited
US3344162A
Cited
US3362979A
Cited
US4073840A
Cited
US4218543A
Cited
US4190711A
Cited
US4242306A
Cited
GB2035111A
Cited
US4254069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |