US3897372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke-flame retardant hydrophilic urethane and method
Assignee: Hampshire Chemical Corp
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Filing: 1974-04-17
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Granted: 1975-07-29
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Expires: 1994-04-17
Abstract
Abstract The invention disclosed relates to a new polyurethane composition having improved flame retardancy and reduced smoke density; and to a method for preparing same. The present composition includes a hydrophilic polyurethane having alumina hydrate, and a melamine-acid containing compound disposed therein, and in an embodiment composition silica is further included to lower smoke density values.
Inventors
- 👤 Clifton Leroy Kehr
- 👤 Robert M Murch
- 👤 Nelson Samuel Marans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:59
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0095; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/24; C08K5/00; C08K5/16; C08K5/34; C08L; C08L61/00; C08L61/20; C08L61/26; C08L61/28; C08L75/00; C08L75/04; C08L75/08; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/903; Y10S521/905; Y10S521/906
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
124 words
IN A POLYURETHANE FOAM COMPOSITION FORMED BY REACTING A RESIN PREPOLYMER AND A WATER REACTANT THE IMPROVEMENT WHICH COMPRISES INCORPORATION OF A SMOKE-FLAME RETARDANT, SAID RETARDANT CONSISTING ESSENTIALLY OF ALUMINA HYDRATE HAVING AN AVERAGE PARTICLE SIZE OF ABOUT 0.5 TO ABOUT 120 MICRONS AND DISPOSED IN AN AMOUNT OF ABOUT 50 TO ABOUT 400 PARTS BY WEIGHT PER 100 PARTS PREPOLYMER RESIN TO BE REACTED, IN COMBINATION WITH BORIC ACID AND AN EQUAL PART BY WEIGHT OF A MELAMINE CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF MELAMINE-FORMALDEHYDE RESIN, BUTYLATED-MALAMINE RESIN, MELAMINE-ACRYLIC RESIN WHEREIN SAID MELAMINE CONTAINING COMPOUND IS INCLUDED IN AN AMOUNT FROM ABOUT 1 TO ABOUT 200 PARTS BY WEIGHT PER PART BT WEIGHT OF RESIN POLYMER REACTANT USED FOR POLURETHANE GENERATION.
Claim 2
Dependent Claim
124 words
IN A POLYURETHANE FOAM COMPOSITION FORMED BY REACTING A RESIN PREPOLYMER AND A WATER REACTANT THE IMPROVEMENT WHICH COMPRISES INCORPORATION OF A SMOKE-FLAME RETARDANT, SAID RETARDANT CONSISTING ESSENTIALLY OF ALUMINA HYDRATE HAVING AN AVERAGE PARTICLE SIZE OF ABOUT 0.5 TO ABOUT 120 MICRONS AND DISPOSED IN AN AMOUNT OF ABOUT 50 TO ABOUT 400 PARTS BY WEIGHT PER 100 PARTS PREPOLYMER RESIN TO BE REACTED, IN COMBINATION WITH BORIC ACID AND AN EQUAL PART BY WEIGHT OF A MELAMINE CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF MELAMINE-FORMALDEHYDE RESIN, BUTYLATED-MALAMINE RESIN, MELAMINE-ACRYLIC RESIN WHEREIN SAID MELAMINE CONTAINING COMPOUND IS INCLUDED IN AN AMOUNT FROM ABOUT 1 TO ABOUT 200 PARTS BY WEIGHT PER PART BT WEIGHT OF RESIN POLYMER REACTANT USED FOR POLURETHANE GENERATION.
Claim 3
Dependent Claim
13 words
THE POLYURETHANE COMPOSITION OF CLAIM 11 WHEREIN THE RETARDANT COMPONENT FURTHER INCLUDES SILICA.
Claim 4
Dependent Claim
36 words
The polyurethane composition of claim 2 wherein the amount of silica is from about 1 part by weight to about 100 parts by weight per 100 parts by weight resin polymer reactant used for polyurethane generation.
Claim 5
Dependent Claim
28 words
The polyurethane composition of claim 1 wherein the polyurethane composition is prepared using an isocyanate capped polyoxyethylene polyol having a hydroxyl functionality of about 2 to about 8.
Claim 6
Dependent Claim
18 words
The polyurethane composition of claim 1 wherein melamine is combined with boric acid in equal parts by weight.
Claim 7
Independent Claim
131 words
A method for preparing a polyurethane foam composition having improved reduced smoke-flame properties which method comprises, reacting an isocyanate capped polyoxyethylene polyol with an aqueous component in the presence of an effective amount of a smoke-flame retardant component, said retardant component consisting essentially of alumina hydrate having an average particle size of about 0.5 to about 120 microns and disposed in an amount of about 50 to about 40 parts by weight per 100 parts prepolymer resin to be reacted, in combination with a melamine-acid containing compound selected from the group consisting of melamine, melamine-formaldehyde resin, butylatedmelamine resin, melamine-acrylic resin wherein said melamine containing compound is included in an amount from about 1 to about 200 parts by weight per part by weight of resin polymer reactant used for polyurethane generation.
Claim 8
Independent Claim
131 words
A method for preparing a polyurethane foam composition having improved reduced smoke-flame properties which method comprises, reacting an isocyanate capped polyoxyethylene polyol with an aqueous component in the presence of an effective amount of a smoke-flame retardant component, said retardant component consisting essentially of alumina hydrate having an average particle size of about 0.5 to about 120 microns and disposed in an amount of about 50 to about 40 parts by weight per 100 parts prepolymer resin to be reacted, in combination with a melamine-acid containing compound selected from the group consisting of melamine, melamine-formaldehyde resin, butylatedmelamine resin, melamine-acrylic resin wherein said melamine containing compound is included in an amount from about 1 to about 200 parts by weight per part by weight of resin polymer reactant used for polyurethane generation.
Claim 9
Dependent Claim
13 words
The method of claim 6 wherein silica is included in the smoke-flame component.
Claim 10
Dependent Claim
38 words
The method of claim 6 wherein the polyoxyethylene polyol has a weight average molecular weight of about 200 to about 20,000 and wherein the isocyanate capped polyoxyethylene polyol has a isocyanate functionality of about 2 to about 8.
Claim 11
Dependent Claim
15 words
The method of claim 8 wherein the molecular weight is about 600 to about 6,000.
Claim 12
Dependent Claim
17 words
The method of claim 6 wherein a crosslinking agent is included when the isocyanate functionality is 2.
Claim 13
Dependent Claim
23 words
The method of claim 6 wherein the available water content ranges from about 1300 H2O Index Value to about 78,000 H2O Index Value.
Claim 14
Dependent Claim
16 words
The method of claim 11 wherein the H2O Index Value is about 4,000 to about 40,000.
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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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |