US3876571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible polyurethane foams which are flame retardant
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1973-02-22
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Granted: 1975-04-08
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Expires: 1993-02-22
Abstract
Abstract In low density, flexible and semiflexible polyetherurethane foams containing chlorine-containing polymers such as polyvinyl chloride, zinc oxide and antimony oxide, part of the chlorinecontaining polymer can be replaced with a chlorinated paraffin provided a proportionate reduction is made in the amount of the zinc oxide employed. Such foams are still flame retardant.
Inventors
- 👤 David S Cobbledick
- 👤 Arthur J Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:39
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0095; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/02; C08K5/59; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L57/00; C08L57/06; C08L57/08; C08L75/00; C08L75/04; C08L75/08; C08J2375/00; C08J2375/04; C08J2375/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
204 words
A LOW DENSITY, FLEXIBLE OR SEMIFLEXIBLE FIRE RETARDANT POLYETHERURETHANE FOAM, THE ETHER MOIETIES OF SAID FOAM BEING DERIVED FROM POLYETHER POLYOLS HAVING A MOLECULAR WEIGHT OF FROM ABOUT 1,000 TO 10,000 AND HAVING FROM 2 TO 4 HYDROXYL GROUPS CONTAINING, BASED ON 100 PARTS BY WEIGHT OF SAID POLYOL, (I) FROM ABOUT 1 TO 50 PARTS BY WEIGHT OF A FINELY DIVIDED, SOLID CHLORINE CONTAINING POLYMERIC RESIN HAVING AN INTRINSIC VISCOSITY OF FROM ABOUT 0.25 TO 2.5 (II) FINELY DIVIDED ZINC OXIDE IN AN AMOUNT OF FROM ABOUT 0.1 TO 10 PARTS BY WEIGHT, (III) FINELY DIVIDED ANTIMONY TRIOXIDE IN AN AMOUNT OF FROM ABOUT 0.5 TO 15 PARTS BY WEIGHT, AND (IV) A CHLORINATED PARAFFIN HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 250 TO 1400 AND CONTAINING FROM ABOUT 40 TO 70 PERCENT BY WEIGHT OF CHLORINE, WHEREIN SAID CHLORINATED PARAFFIN IS USED IN AN AMOUNT BH WEIGHT SUFFICIENT TO REPLACE FROM ABOUT 5 TO 80 PERCENT BY WEIGHT OF SAID CHLORINE-CONTAINING POLYMERIC RESIN ON ESSENTIALLY A PERCENT BY WEIGHT CHLORINE (CL) BASIS, AND WHEREIN THE PERCENT BY WEIGHT OF SAID ZINC OXIDE IS ESSENTIALLY PROPORTIONALLY REDUCED IN ACCORDANCE WITH THE REDUCTION IN THE PERCENT BY WEIGHT OF SAID CHLORINE-CONTAINING POLYMERIC RESIN.
Claim 2
Dependent Claim
204 words
A LOW DENSITY, FLEXIBLE OR SEMIFLEXIBLE FIRE RETARDANT POLYETHERURETHANE FOAM, THE ETHER MOIETIES OF SAID FOAM BEING DERIVED FROM POLYETHER POLYOLS HAVING A MOLECULAR WEIGHT OF FROM ABOUT 1,000 TO 10,000 AND HAVING FROM 2 TO 4 HYDROXYL GROUPS CONTAINING, BASED ON 100 PARTS BY WEIGHT OF SAID POLYOL, (I) FROM ABOUT 1 TO 50 PARTS BY WEIGHT OF A FINELY DIVIDED, SOLID CHLORINE CONTAINING POLYMERIC RESIN HAVING AN INTRINSIC VISCOSITY OF FROM ABOUT 0.25 TO 2.5 (II) FINELY DIVIDED ZINC OXIDE IN AN AMOUNT OF FROM ABOUT 0.1 TO 10 PARTS BY WEIGHT, (III) FINELY DIVIDED ANTIMONY TRIOXIDE IN AN AMOUNT OF FROM ABOUT 0.5 TO 15 PARTS BY WEIGHT, AND (IV) A CHLORINATED PARAFFIN HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 250 TO 1400 AND CONTAINING FROM ABOUT 40 TO 70 PERCENT BY WEIGHT OF CHLORINE, WHEREIN SAID CHLORINATED PARAFFIN IS USED IN AN AMOUNT BH WEIGHT SUFFICIENT TO REPLACE FROM ABOUT 5 TO 80 PERCENT BY WEIGHT OF SAID CHLORINE-CONTAINING POLYMERIC RESIN ON ESSENTIALLY A PERCENT BY WEIGHT CHLORINE (CL) BASIS, AND WHEREIN THE PERCENT BY WEIGHT OF SAID ZINC OXIDE IS ESSENTIALLY PROPORTIONALLY REDUCED IN ACCORDANCE WITH THE REDUCTION IN THE PERCENT BY WEIGHT OF SAID CHLORINE-CONTAINING POLYMERIC RESIN.
Claim 3
Dependent Claim
61 words
A foam according to claim 1 in which the polyol is a polyalkylene ether polyol and the catalyst includes, based on 100 parts by weight of said polyol, a tertiary amine present in an amount of from about 0.05 to 0.9 part by weight and a metal-containing polyurethane catalyst present in an amount from about 0.1 to 0.9 part by weight.
Claim 4
Dependent Claim
131 words
A foam according to claim 2 in which the resin (I) is selected from the group consisting of polyvinyl chloride, a copolymer of a major amount of vinyl chloride and a minor amount of vinyl acetate, a partially hydrolyzed copolymer of a major amount of vinyl chloride and a minor amount of vinyl acetate, and chlorinated polyethylene and in which said resin is present in an amount of from about 2 to 25 parts by weight, the zinc oxide (II) is present in an amount of from about 0.2 to 5 parts by weight, and the antimony trioxide (III) is used in an amount of from about 1 to 10 parts by weight, the amounts of said (I), (II) and (III) being based on 100 parts by weight of said polyol.
Claim 5
Dependent Claim
20 words
A foam according to claim 3 in which the resin (I) is polyvinyl chloride prepared by an emulsion polymerization process.
Claim 6
Dependent Claim
14 words
A foam according to claim 4 in which the metalcontaining catalyst is stannous octoate.
Claim 7
Dependent Claim
18 words
A foam according to claim 1 in which said chlorinated paraffin (IV) is a liquid at room temperature.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |