US4448904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction injection molded elastomer using a methylene bis(phenyliscoyanate) containing 2,4' isomer in amounts greater than about 10 percent
Assignee: Huntsman Corp
•
Filing: 1983-06-08
•
Granted: 1984-05-15
•
Expires: 2003-06-08
Abstract
Abstract The invention is a method of making a molded reaction injection molded elastomer. The reaction injection molded (RIM) elastomer is made by injecting via a RIM machine into a mold cavity of the desired configuration, a formulation comprising in the first stream amine terminated polyethers of greater than 1,500 molecular weight, a chain extender, and in the second stream methylene bis(phenylisocyanate) with a 2,4' isomer of greater than about 10%. RIM elastomers are useful, for example, for automobile body parts.
Inventors
- 👤 Richard J. G. Dominguez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:19
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5024; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6685; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C08G18/7671; C08G2120/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
70 words
A method for making a reaction injection molded elastomer comprising injecting into a mold cavity of desired configuration, a formulation comprising primary or secondary amine terminated polyethers of greater than about 1,500 molecular weight wherein greater than 50% of the active hydrogens are in the form of amine hydrogens, an amine terminated chain extender and a methylene bis(phenylisocyanate) wherein the 2,4' isomer is present in amounts greater than about 10%.
Claim 2
Independent Claim
70 words
A method for making a reaction injection molded elastomer comprising injecting into a mold cavity of desired configuration, a formulation comprising primary or secondary amine terminated polyethers of greater than about 1,500 molecular weight wherein greater than 50% of the active hydrogens are in the form of amine hydrogens, an amine terminated chain extender and a methylene bis(phenylisocyanate) wherein the 2,4' isomer is present in amounts greater than about 10%.
Claim 3
Dependent Claim
19 words
A method as in claim 1 wherein the amine terminated polyether has a functionality of about 2 to 6.
Claim 4
Dependent Claim
20 words
A method as in claim 2 wherein the functionality of the amine terminated polyethers is from about 2 to 3.
Claim 5
Dependent Claim
19 words
A method as in claim 1 wherein the amine terminated polyether has a molecular weight greater than about 2,500.
Claim 6
Dependent Claim
15 words
A method as in claim 1 wherein the 2,4'isomer comprises about 15% of the isocyanate.
Claim 7
Dependent Claim
66 words
A RIM elastomer made by injecting into a mold cavity of the desired configuration, a formulation comprising primary or secondary amine terminated polyethers of greater than about 1,500 molecular weight wherein greater than 50% of the active hydrogens are in the form of amine hydrogens, an amine terminated chain extender and a methylene bis(phenylisocyanate) wherein the 2,4' isomer is present in amounts greater than about 10%.
Claim 8
Dependent Claim
66 words
A RIM elastomer made by injecting into a mold cavity of the desired configuration, a formulation comprising primary or secondary amine terminated polyethers of greater than about 1,500 molecular weight wherein greater than 50% of the active hydrogens are in the form of amine hydrogens, an amine terminated chain extender and a methylene bis(phenylisocyanate) wherein the 2,4' isomer is present in amounts greater than about 10%.
Claim 9
Dependent Claim
19 words
A method as in claim 6 wherein the amine terminated polyether has a functionality of about 2 to 6.
Claim 10
Dependent Claim
19 words
A method as in claim 7 wherein the amine terminated polyether has a functionality of about 2 to 3.
Claim 11
Dependent Claim
19 words
A method as in claim 6 wherein the amine terminated polyether has a molecular weight greater than about 2,500.
Claim 12
Dependent Claim
16 words
A method as in claim 6 wherein the 2,4' isomer comprises about 15% of the isocyanate.
Claim 13
Independent Claim
69 words
A method for making a RIM elastomer comprising injecting into a mold cavity of the desired configuration, a formulation comprising primary or secondary amine terminated polyethers of greater than about 5,000 molecular weight wherein greater than 50% of the active hydrogens are in the form of amine hydrogens, an amine terminated chain extender and a methylene bis(phenylisocyanate) wherein the 2,4' isomer is present in amounts greater than about 10%.
Claim 14
Independent Claim
69 words
A method for making a RIM elastomer comprising injecting into a mold cavity of the desired configuration, a formulation comprising primary or secondary amine terminated polyethers of greater than about 5,000 molecular weight wherein greater than 50% of the active hydrogens are in the form of amine hydrogens, an amine terminated chain extender and a methylene bis(phenylisocyanate) wherein the 2,4' isomer is present in amounts greater than about 10%.
Claim 15
Dependent Claim
66 words
A RIM elastomer made by injecting into a mold cavity of the desired configuration, a formulation comprising primary or secondary amine terminated polyethers of greater than about 5,000 molecular weight wherein greater than 50% of the active hydrogens are in the form of amine hydrogens, an amine terminated chain extender and a methylene bis(phenylisocyanate) wherein the 2,4' isomer is present in amounts greater than about 10%.
Claim 16
Dependent Claim
66 words
A RIM elastomer made by injecting into a mold cavity of the desired configuration, a formulation comprising primary or secondary amine terminated polyethers of greater than about 5,000 molecular weight wherein greater than 50% of the active hydrogens are in the form of amine hydrogens, an amine terminated chain extender and a methylene bis(phenylisocyanate) wherein the 2,4' isomer is present in amounts greater than about 10%.
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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |