US4148819A
Expired / Lapsed
US
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Aliphatic diisocyanates
Assignee: Huntsman Corp
•
Filing: 1978-04-03
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Granted: 1979-04-10
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Expires: 1998-04-03
Abstract
Abstract Covers a diisocyanate having the following structural formula: ##STR1## WHERE X IS AN AVERAGE NUMBER RANGING FROM ABOUT 6 TO 50, AND Y AND Z ARE AVERAGE NUMBERS RANGING FROM ABOUT 1 TO ABOUT 20, WITH THE SUM OF Y AND Z BEING FROM ABOUT 6 TO ABOUT 40. Also covers a method of preparing said diisocyanate.
Inventors
- 👤 Lewis W. Watts, Jr.
- 👤 Clifford L. Lambert, Jr.
- 👤 Edward T. Marquis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:27
CPC Classifications
C; C07; C07C; C07C265/00; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/771; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2606; C08G65/2609; C08G65/32; C08G65/321; C08G65/322; C08G65/324; C08G65/325; C08G65/3255
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
51 words
A composition comprising a diisocyanate having the following structural formula: ##STR4## where x is an average number ranging from about 6 to 50, and y and z are average numbers ranging from about 1 to about 20, with the sum of y and z being from about 6 to about 40.
Claim 2
Dependent Claim
51 words
A composition comprising a diisocyanate having the following structural formula: ##STR4## where x is an average number ranging from about 6 to 50, and y and z are average numbers ranging from about 1 to about 20, with the sum of y and z being from about 6 to about 40.
Claim 3
Dependent Claim
14 words
The composition of claim 1 where the sum of y and z are 6-20.
Claim 4
Dependent Claim
14 words
The composition of claim 2 where the sum of y and z are 6-10.
Claim 5
Dependent Claim
9 words
The composition of claim 1 where x equals 8-40.
Claim 6
Dependent Claim
129 words
A process of preparing an aliphatic diisocyanate having the following structural formula: ##STR5## where x is an average number ranging from about 6 to 50, and y and z are average numbers ranging from about 1 to about 20, with the sum of y and z being from about 6 to about 40, which comprises providing a polybutanediol having the structure: H--O--CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2).sub.x OH where x is as above and propoxylating said polybutanediol with sufficient propylene oxide to provide an adduct having the structure: ##STR6## where x, y and z are as above and reductively aminating said adduct with ammonia or ammonium hydroxide in presence of a reducing catalyst to provide a polymeric amine having the structure: ##STR7## and phosgenating said polymeric amine to provide said diisocyanate.
Claim 7
Dependent Claim
129 words
A process of preparing an aliphatic diisocyanate having the following structural formula: ##STR5## where x is an average number ranging from about 6 to 50, and y and z are average numbers ranging from about 1 to about 20, with the sum of y and z being from about 6 to about 40, which comprises providing a polybutanediol having the structure: H--O--CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2).sub.x OH where x is as above and propoxylating said polybutanediol with sufficient propylene oxide to provide an adduct having the structure: ##STR6## where x, y and z are as above and reductively aminating said adduct with ammonia or ammonium hydroxide in presence of a reducing catalyst to provide a polymeric amine having the structure: ##STR7## and phosgenating said polymeric amine to provide said diisocyanate.
Claim 8
Dependent Claim
12 words
The process of claim 5 wherein said catalyst is a nickel-based catalyst.
Claim 9
Dependent Claim
16 words
The process of claim 6 wherein said nickel based catalyst is Raney nickel or nickel-copper-chromium catalyst.
Claim 10
Dependent Claim
24 words
The process of claim 5 wherein said propoxylation is carried out to provide an adduct wherein the sum of y and z are 6-20.
Claim 11
Dependent Claim
14 words
The process of claim 8 wherein the sum of y and z are 6-10.
References Cited (Backward Citations)
US3370077A
Cited
US3631199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |