Patent US4417998A successfully refreshed from Google Patents.
US4417998A
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Polyurethane foams and processes for preparation
Assignee: Individual
•
Filing: 1983-05-20
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Granted: 1983-11-29
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Expires: 2003-05-20
Abstract
Abstract Polyurethane foams which may be rendered flame resistant by the addition of flame retardants are produced by reaction between a carbohydrate, a polyisocyanate and water in the presence of a suitable surfactant and polyurethane forming catalyst.
Inventors
- 👤 Richard B. Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:05
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/3218; C08G18/40; C08G18/64; C08G18/6484; C08J9/0014; C08J9/0038; C08G2110/00; C08G2110/0008; C08G2110/0016; C08G2110/0025; C08G2110/0083; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/906
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
29 words
A mixture useful for the preparation of polyurethane foams comprising an untreated carbohydrate in which substantially all of the hydroxyl groups are free, water and a polyurethane producing catalyst.
Claim 2
Dependent Claim
29 words
A mixture useful for the preparation of polyurethane foams comprising an untreated carbohydrate in which substantially all of the hydroxyl groups are free, water and a polyurethane producing catalyst.
Claim 3
Dependent Claim
36 words
A mixture as in claim 1 comprising from 25 to 120 parts by weight carbohydrate, 0.5 to 5 parts by weight catalyst and up to 30 parts by weight water, all based on the total weight.
Claim 4
Dependent Claim
26 words
A mixture as in claim 1 or 2 wherein the carbohydrate is selected from the group consisting of cornstarch, cellulose, corn syrup, dextrose, sucrose and molasses.
Claim 5
Dependent Claim
13 words
A mixture as in claim 1 or 2 wherein the carbohydrate is cornstarch.
Claim 6
Dependent Claim
14 words
A mixture as in claim 1 or 2 wherein the carbohydrate is corn syrup.
Claim 7
Dependent Claim
48 words
A mixture as in claim 1 or 2 wherein the catalyst is selected from the group consisting of stannous octoate, stannous oleate, dibutyltin dioctate, tributyltin acetate, dibutyltin diacetate, dibutyltin dilaurate, triethylamine, dimethylaminoethanol, diethylcyclohexylamine, lauryldimethylamine, triethanolamine, tetrakis(2-hydroxypropyl)ethylenediamine, N,N,N',N'-tetramethylethylenediamine, N-methylpiperazine, 2,2,2-(diazabicyclooctane)triethylenediamine, 1,2,4-trimethylpiperazine, triethylenediamine, 2-methyl imidazole, 1,2-dimethyl imidazole, 2-amino-2-methyl-1,1-propanol, tris-(hydroxymethyl)aminomethane, 2-amino-2-ethyl-1,3-propanediol.
Claim 8
Dependent Claim
67 words
A mixture as in claim 1 or 2 wherein the carbohydrate is selected from the group consisting of cornstarch, cellulose, corn syrup, dextrose, sucrose and molasses, and the catalyst is selected from the group consisting of stannous octoate, stannous oleate, dibutyltin dioctate, tributyltin acetate, dibutyltin diacetate, dibutyltin dilaurate, triethylamine, dimethylaminoethanol, diethylcyclohexylamine, lauryldimethylamine, triethanolamine, tetrakis(2-hydroxypropyl)ethylenediamine, N,N,N',N'-tetramethylethylenediamine, N-methylpiperazine, 2,2,2-(diazabicyclooctane)triethylenediamine, 1,2,4-trimethylpiperazine, triethylenediamine, 2-methyl imidazole, 1,2-dimethyl imidazole, 2-amino-2-methyl-1,1-propanol, tris-(hydroxymethyl) aminomethane, 2-amino-2-ethyl-1,3-propanediol.
Claim 9
Dependent Claim
50 words
A mixture as in claim 1 or 2 wherein the carbohydrate is corn syrup and the catalyst is selected from the group consisting of stannous octoate, stannous oleate, dibutyltin dioctate, tributyltin acetate, dibutyltin ethanol, diethylcyclohexylamine, lauryldimethylamine, triethanolamine, tetrakis(2-hydroxypropyl)ethylenediamine, N,N,N',N'-tetramethylethylenediamine, N-methylpiperazine, 2,2,2-(diazabicyclooctane)triethylenediamine, 1,2,4-trimethylpiperazine, triethylenediamine, 2-methyl imidazole, 1,2-dimethyl imidazole, 2-amino-2-methyl-1,1-propanol, tris-(hydroxymethyl)aminomethane, 2-amino-2-ethyl-1,3-propanediol.
Claim 10
Dependent Claim
52 words
A mixture as in claim 1 or 2 wherein the carbohydrate is corn syrup and the catalyst is selected from the group consisting of stannous octoate, stannous oleate, dibutyltin dioctate, tributyltin acetate, dibutyltin diacetate, dibutyltin dilaurate, triethylamine, dimethylaminoethanol, diethylcyclohexylamine, lauryldimethylamine, triethanolamine, tetrakis(2-hydroxypropyl)ethylenediamine, N,N,N',N'-tetramethylethylenediamine, 1,2,4-trimethylpiperazine, triethylenediamine, 2-methyl imidazole, 1,2-dimethyl imidazole, 2-amino-2-methyl-1,1-propanol, tris-(hydroxymethyl)aminomethane, 2-amino-2-ethyl-1,3-propanediol.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |