US3875258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymers
Assignee: BASF Corp
•
Filing: 1973-10-15
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Granted: 1975-04-01
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Expires: 1993-10-15
Abstract
Abstract Graft copolymers are prepared by the in situ polymerization of phosphorus or phosphorus and halogen containing monomers in the presence of a free radical catalyst in a polyol containing from about 1.0 to about 2.5 moles of unsaturated per mole of polyol.
Inventors
- 👤 Jr John T Patton
- 👤 Louis C Pizzini
- 👤 Jr William W Levis
- 👤 Bernard A Merkl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:28
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/638; C08F; C08F291/00; C08F291/06; C08F291/08; C08G18/635
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
A FIRE RETARDANT GRAFT COPOLYMER PREPARED BY THE IN SITU POLYMERIZATION IN THE PRESENCE OF A FREE RADICAL CATALYST AT A TEMPERATURE OF FROM 70*C. TO ABOUT 170*C. OF A. AN ETHYLENICALLY UNSATURATED MONOMER OR MIXTURE OF MONOMERS, AT LEAST ONE OF WHICH CONTAINS PHOSPHROUS OR PHOSPHORUS AND HALOGEN, AND B. AN UNSATURATED POLYOL HAVING AN ACID NUMBER OF ABOUT ONE OR LESS CONTAINING FROM ABOUT 1.0 MOLE TO ABOUT 2.5 MOLES OF EHTYLENIC UNSATURATION PER MOLE OF POLYOL, SAID POLYMERIZATION CARRIED OUT BY SIMULATENOUSLY ADDING AT A STEADY RATE THE MONOMER AND THE CATALYST TO THE POLYOL.
Claim 2
Dependent Claim
98 words
A FIRE RETARDANT GRAFT COPOLYMER PREPARED BY THE IN SITU POLYMERIZATION IN THE PRESENCE OF A FREE RADICAL CATALYST AT A TEMPERATURE OF FROM 70*C. TO ABOUT 170*C. OF A. AN ETHYLENICALLY UNSATURATED MONOMER OR MIXTURE OF MONOMERS, AT LEAST ONE OF WHICH CONTAINS PHOSPHROUS OR PHOSPHORUS AND HALOGEN, AND B. AN UNSATURATED POLYOL HAVING AN ACID NUMBER OF ABOUT ONE OR LESS CONTAINING FROM ABOUT 1.0 MOLE TO ABOUT 2.5 MOLES OF EHTYLENIC UNSATURATION PER MOLE OF POLYOL, SAID POLYMERIZATION CARRIED OUT BY SIMULATENOUSLY ADDING AT A STEADY RATE THE MONOMER AND THE CATALYST TO THE POLYOL.
Claim 3
Dependent Claim
14 words
The copolymer of claim 1 wherein the monomer is bis( Beta -chloroethyl) vinyl phosphonate.
Claim 4
Dependent Claim
19 words
The copolymer of claim 1 wherein the monomer is a mixture of bis( Beta -chloroethyl) vinyl phosphoNate and styrene.
Claim 5
Dependent Claim
20 words
The copolymer of claim 1 wherein the monomer is a mixture of bis( Beta -chloroethyl) vinyl phosphonate and vinylidene chloride.
Claim 6
Dependent Claim
20 words
The copolymer of claim 1 wherein the monomer is a mixture of bis( Beta -chloroethyl) vinyl phosphonate and vinyl chloride.
Claim 7
Dependent Claim
38 words
The copolymer of claim 1 wherein the unsaturated polyol is prepared by the reaction of an alkylene oxide with the reaction product of maleic anhydride with a polyether polyol having an equivalent weight of from 250 to 5,000.
Claim 8
Dependent Claim
35 words
The copolymer of claim 1 wherein the unsaturated polyol is prepared by the reaction of a polyhydric alcohol having from two to six hydroxyl groups with a mixture of propylene oxide and allyl glycidyl ether.
Claim 9
Dependent Claim
10 words
The copolymer of claim 1 wherein the catalyst is azo-bis(isobutyronitrile).
References Cited (Backward Citations)
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US3163627A
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US3175998A
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US3210442A
Cited
US3577480A
Cited
US3641202A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |