US4452922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide co-polymer polyols made with diesters and diamines and polyurethanes therefrom
Assignee: Dow Chemical Co
•
Filing: 1983-02-22
•
Granted: 1984-06-05
•
Expires: 2003-02-22
Abstract
Abstract A polyamide co-polymer polyol made by the reaction of a dicarboxylic acid diester with a diamine in the presence of a polyether polyol is described. The nylon formed should be present in the polyol in an amount of from 1 to 30 wt. %. The polyether polyol may have a molecular weight of about 2,000 to 8,000. This polyamide co-polymer polyol may be used in the manufacture of elastomers and flexible polyurethane foams which are characterized by good load bearing properties.
Inventors
- 👤 George P. Speranza
- 👤 Robert L. Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:50
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; C08L75/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
A polyamide co-polymer polyol dispersion for use in highly resilient flexible foams and elastomers made by the reaction of a dicarboxylic acid or ester derivative thereof with an aliphatic diamine where the diamine is selected from the group consisting of 1,6-hexamethylenediamine and piperazine, in the presence of a polyether polyol wherein the combined portion of dicarboxylic acid or ester derivative/aliphatic diamine co-polymer is about 1 to 30 wt. % of the polyether polyol portion and the mole ratio of diester to diamine is about 1:1.
Claim 2
Dependent Claim
85 words
A polyamide co-polymer polyol dispersion for use in highly resilient flexible foams and elastomers made by the reaction of a dicarboxylic acid or ester derivative thereof with an aliphatic diamine where the diamine is selected from the group consisting of 1,6-hexamethylenediamine and piperazine, in the presence of a polyether polyol wherein the combined portion of dicarboxylic acid or ester derivative/aliphatic diamine co-polymer is about 1 to 30 wt. % of the polyether polyol portion and the mole ratio of diester to diamine is about 1:1.
Claim 3
Dependent Claim
23 words
The polyamide co-polymer polyol of claim 1 wherein the polyether polyol has a molecular weight in the range of about 2,000 to 8,000.
Claim 4
Dependent Claim
25 words
The polyamide co-polymer polyol of claim 1 in which the dicarboxylic acid diester is selected from the group consisting of dialkyl oxalates and dialkyl adipates.
Claim 5
Dependent Claim
13 words
The polyamide co-polymer polyol of claim 1 in which the diamine is 1,6-hexamethylenediamine.
Claim 6
Independent Claim
83 words
A method for producing a polyurethane which comprises first making a polyamide co-polymer polyol by reacting equimolar amounts of a dicarboxylic acid or ester derivative thereof with an aliphatic diamine, where the diamine is selected from the group consisting of 1,6-hexamethylenediamine and piperazine, in the presence of a polyether polyol wherein the combined portion of dicarboxylic acid or ester derivative/diamine co-polymer is 1 to 30 wt. % of the polyether polyol portion and then reacting said polyamide co-polymer polyol with an organic polyisocyanate.
Claim 7
Independent Claim
83 words
A method for producing a polyurethane which comprises first making a polyamide co-polymer polyol by reacting equimolar amounts of a dicarboxylic acid or ester derivative thereof with an aliphatic diamine, where the diamine is selected from the group consisting of 1,6-hexamethylenediamine and piperazine, in the presence of a polyether polyol wherein the combined portion of dicarboxylic acid or ester derivative/diamine co-polymer is 1 to 30 wt. % of the polyether polyol portion and then reacting said polyamide co-polymer polyol with an organic polyisocyanate.
Claim 8
Dependent Claim
21 words
The method of claim 5 wherein the polyether polyol has a molecular weight in the range of about 2,000 to 8,000.
Claim 9
Dependent Claim
23 words
The method of claim 5 in which the dicarboxylic acid diester is selected from the group consisting of dialkyl oxalates and dialkyl adipates.
Claim 10
Dependent Claim
11 words
The method of claim 5 in which the diamine is 1,6-hexamethylenediamine.
References Cited (Backward Citations)
US3666724A
Cited
US3917740A
Cited
US4089835A
Cited
US4118376A
Cited
US4181641A
Cited
US4296213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |