Patent US4369258A successfully refreshed from Google Patents.
US4369258A
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Polyurethane foam compositions and a process for making same using a melamine polyol
Assignee: Wyeth Holdings LLC
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Filing: 1981-07-22
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Granted: 1983-01-18
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Expires: 2001-07-22
Abstract
Abstract Polyurethane foams having improved physical properties are prepared by reacting a polyisocyanate and polyol in the presence of a melamine polyol which contains no polyether linkages and a foaming agent.
Inventors
- 👤 Douglas L. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3842; C08G18/3851
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
In a polyurethane foam prepared from a polyisocyanate, a polyol, and a foaming agent, the improvement which comprises incorporating therein prior to foaming an amount sufficient to improve the resultant foam of a melamine polyol of the formula ##STR2## wherein each R is NH 2 , an alkyl (C 2 -C 12 ) amine, or a hydroxyalkyl (C 2 -C 4 ) substituted amine and there is an average at least about one hydroxy group per melamine polyol molecule.
Claim 2
Dependent Claim
79 words
In a polyurethane foam prepared from a polyisocyanate, a polyol, and a foaming agent, the improvement which comprises incorporating therein prior to foaming an amount sufficient to improve the resultant foam of a melamine polyol of the formula ##STR2## wherein each R is NH 2 , an alkyl (C 2 -C 12 ) amine, or a hydroxyalkyl (C 2 -C 4 ) substituted amine and there is an average at least about one hydroxy group per melamine polyol molecule.
Claim 3
Dependent Claim
29 words
The polyurethane foam of claim 1 wherein the amount of melamine polyol present is about 1 to 40%, by weight, based on the total weight of the reaction mixture.
Claim 4
Dependent Claim
29 words
The polyurethane foam of claim 1 wherein the amount of melamine polyol present is about 1.5 to 15%, by weight, based on the total weight of the reaction mixture.
Claim 5
Dependent Claim
47 words
The polyurethane foam of claim 1 further containing a catalyst selected from the group consisting of N-methyl morpholine, 4,4'-dithiomorpholine, antimony caprylate, antimony naphenate, antimonious chloride, dibutyltin dilaurate, tri-n-octyltin oxide, hexabutyltin, tributyltin phosphate, stannic chloride, tetramethylethylenediamine, triethylenediamine, dimethylaminoethanol, bis(dimethylaminoethyl)ether, triethylamine, trimethylamine, diethylene triamine, tetramethyl butane diamine and dimethylcyclohexylamine.
Claim 6
Dependent Claim
33 words
The polyurethane foam of claims 1 or 2 wherein on average at least about 1.8 of the R groups per molecule are NHCH 2 CH(OH)CH 3 and the remainder are NH 2 .
Claim 7
Dependent Claim
33 words
The polyurethane foam of claims 1 or 2 wherein on average about 2.4 to 2.8 of the R groups per molecule are NHCH 2 CH(OH)CH 3 and the remainder are NH 2 .
Claim 8
Dependent Claim
25 words
The polyurethane foam of claims 1 or 2 wherein at least one R is NHCH 2 CH 2 OH or NHCH 2 CH(OH)CH 3 .
Claim 9
Dependent Claim
13 words
The polyurethane foam of claim 1 wherein the polyol is a polyether polyol.
Claim 10
Dependent Claim
17 words
The polyurethane foam of claim 1 wherein the polyisocyanate is one or more isomers of toluene diisocyanate.
Claim 11
Dependent Claim
13 words
The polyurethane foam of claim 1 wherein the polyisocyanate is polymethylene polyphenyl isocyanate.
Claim 12
Dependent Claim
34 words
The polyurethane foam of claim 1 wherein the polyisocyanate and at least a portion of the polyol or melamine polyol are reacted to form a prepolymer prior to the addition of the foaming agent.
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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |