Claims
- 1. A process for preparing a flame-retarding urethane polymer, which consists essentially in co-polymerizing a flame-retarding quantity of a compound of the formula ##STR8## in which each of X.sub.1, X.sub.2 and X.sub.3 is hydrogen, halogen, alkyl of up to 6 carbon atoms, --Y--P(O)(OR)(OR' ) or --Y--OH,
- wherein Y is (1) alkylene, (2) alkyl-substituted alkylene, (3) halogen-substituted alkylene wherein each of said alkyl and said alkylene contains from 1 to 6 carbon atoms; or (4) polyoxyalkylene in which each oxyalkylene unit contains 1 to 3 carbon atoms and wherein said polyoxyalkylene contains 2 to 4 of said oxyalkylene units; wherein each of R and R' is phenyl, alkyl or cycloalkyl wherein said alkyl and said cycloalkyl contain 1 to 6 carbon atoms, wherein each of said phenyl, alkyl or cycloalkyl is unsubstituted or substituted by at least one halogen atom, and wherein the Y group is bonded to both the ring nitrogen atom and the phosphonate phosphorus atom via a carbon atom; and
- in which at least one of said X.sub.1, X.sub.2 or X.sub.3 is --Y--P(O)(OR)(OR' ) and at least one of said X.sub.1, X.sub.2 or X.sub.3 is ----OH,
- with a copolymerizable organic monomer having a functional isocyanate group reactive therewith.
- 2. The process of claim 1, wherein at least two of x.sub.1, X.sub.2 or X.sub.3 are --Y--OH.
- 3. The process of claim 1, wherein said compound has the formula ##STR9##
- 4. The process of claim 1, wherein said compound has the formula ##STR10##
- 5. The process of claim 1, wherein said polyurethane is a polyisocyanurate foam.
- 6. A flame-retarding polymer according to the process of claim 1.
- 7. A textile or paper composition containing a flame-retarding quantity of the polymer of claim 6.
Priority Claims (1)
Number |
Date |
Country |
Kind |
7504684 |
Apr 1975 |
NLX |
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Parent Case Info
This is a division of application Ser. No. 678,438 filed Apr. 19, 1976.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3121082 |
Guttag |
Feb 1964 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
678438 |
Apr 1976 |
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