Patent US4632943A successfully refreshed from Google Patents.
US4632943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foams prepared from alkyl dialkanol amine-containing polyols
Assignee: Dow Chemical Co
•
Filing: 1985-04-22
•
Granted: 1986-12-30
•
Expires: 2005-04-22
Abstract
Abstract Polyurethane foams are prepared by reacting a polyisocyanate and a polyahl in the presence of water and a dialkanol tertiary amine. The foams are rigid, useful for thermal insulation in roofs, walls, refrigerators, etc., and are capable of filling mold space completely on foaming (good flowability) without shrinking excessively.
Inventors
- 👤 Jerram B. Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/6505; C08G18/6523; C08G18/6535; C08G18/30; C08G18/32; C08G18/3271; C08G18/3275; C08G18/3287; C08G18/329
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
102 words
An active hydrogen containing composition comprising (a) at least one polyahl, which is not a dialkanol tertiary amine, having at least three active hydrogens per molecule (b) a minor amount of water, and (c) a dialkanol tertiary amine in an amount sufficient to improve the flowability of a foaming reaction mixture prepared from the active hydogen containing composition and a polyisocyanate from about 2 to about 40% compared to a like reaction mixture prepared in the absence of the dialkanol tertiary amine, wherein the isocyanate reactive materials in said active hydrogen containing composition have an average functionality of at least about 3.0.
Claim 2
Dependent Claim
102 words
An active hydrogen containing composition comprising (a) at least one polyahl, which is not a dialkanol tertiary amine, having at least three active hydrogens per molecule (b) a minor amount of water, and (c) a dialkanol tertiary amine in an amount sufficient to improve the flowability of a foaming reaction mixture prepared from the active hydogen containing composition and a polyisocyanate from about 2 to about 40% compared to a like reaction mixture prepared in the absence of the dialkanol tertiary amine, wherein the isocyanate reactive materials in said active hydrogen containing composition have an average functionality of at least about 3.0.
Claim 3
Dependent Claim
13 words
The active hydrogen-containing composition of claim 1 further comprising an auxiliary blowing agent.
Claim 4
Dependent Claim
27 words
The active hydrogen-containing composition of claim 2 wherein the polyahl comprises a major portion of a low equivalent weight polyahl having an equivalent weight from about 50-300.
Claim 5
Dependent Claim
19 words
The active hydrogen-containing composition of claim 3 wherein the low equivalent weight polyahl contains at least 3 active hydrogens.
Claim 6
Dependent Claim
16 words
The active hydrogen-containing composition of claim 4 wherein the low equivalent weight polyahl is a polyol.
Claim 7
Dependent Claim
21 words
The active hydrogen-containing composition of claim 4 containing about 3-20 parts by weight of dialkanol tertiary amine per 100 parts polyahl.
Claim 8
Dependent Claim
17 words
The active hydrogen-containing composition of claim 2 wherein the dialkanol tertiary amine is an alkyl dialkanol amine.
Claim 9
Dependent Claim
20 words
The active hydrogen-containing composition of claim 7 wherein the dialkanol tertiary amine is methyl diethanol amine or ethyl diethanol amine.
Claim 10
Dependent Claim
17 words
The active hydrogen-containing composition of claim 8 wherein the dialkanol tertiary amine is an aralkyl dialkanol amine.
Claim 11
Dependent Claim
15 words
The active hydrogen-containing composition of claim 9 wherein the aralkyldialkanol amine is benzyl diethanol amine.
Claim 12
Dependent Claim
94 words
In a process for preparing a polyurethane foam comprising reacting a polyahl and a polyisocyanate in the presence of water whereby a polyurethane foam is obtained, the improvement comprising conducting said reaction in the presence of a dialkanol tertiary amine in an amount sufficient to improve the flowability of the foaming reacting polyahl and polyisocyanat from about 2 to about 40% compared to a like reaction mixture prepared in the absence of the dialkanol tertiary amine, and wherein the average functionality of all isocyanate-reactive materials employed in said reaction is at least about 3.0.
Claim 13
Dependent Claim
94 words
In a process for preparing a polyurethane foam comprising reacting a polyahl and a polyisocyanate in the presence of water whereby a polyurethane foam is obtained, the improvement comprising conducting said reaction in the presence of a dialkanol tertiary amine in an amount sufficient to improve the flowability of the foaming reacting polyahl and polyisocyanat from about 2 to about 40% compared to a like reaction mixture prepared in the absence of the dialkanol tertiary amine, and wherein the average functionality of all isocyanate-reactive materials employed in said reaction is at least about 3.0.
Claim 14
Dependent Claim
18 words
The process of claim 11 wherein said reaction is conducted in the presence of an auxiliary blowing agent.
Claim 15
Dependent Claim
20 words
The process of claim 12 whereby said polyisocyante and said polyahl are selected such that a rigid foam is obtained.
Claim 16
Dependent Claim
29 words
The process of claim 13 wherein said reaction is conducted in the presence of about 3-20 parts by weight of dialkanol tertiary amine per 100 parts by weight polyahl.
Claim 17
Dependent Claim
15 words
The process of claim 13 wherein the dialkanol tertiary amine is an alkyl dialkanol amine.
Claim 18
Dependent Claim
17 words
The process of claim 15 wherein the alkyldialkanol amine is methyl diethanol amine or ethyl diethanol amine.
Claim 19
Dependent Claim
17 words
The process of claim 13 wherein the dialkanol tertiary amine is benzyl diethanol amine or o-tolyldiethanol amine.
References Cited (Backward Citations)
GB981135A
Cited
US3476933A
Cited
US3655588A
Cited
DE2251889A1
Cited
US3888803A
Cited
US3890255A
Cited
US4067833A
Cited
US4145318A
Cited
US4220732A
Cited
US4339343A
Cited
US4388420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |