Claims
- 1. A process for the preparation of polyurethane foams comprising reacting
- (1) a polyisocyanate with
- (2) a polymer-modified polyol having a molecular weight of from 400 to 10,000 and containing at least two isocyanate-reactive hydrogen atoms,
- in the presence of
- (3) water and/or an organic blowing agent,
- (4) a catalyst,
- (5) melamine as a flameproofing agent, and
- (6) a phosphonic acid ester flameproofing agent selected from the group consisting of compounds having the formulas ##STR3## wherein R.sup.1 is C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 unsaturated alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.7 -C.sub.15 aralkyl, or C.sub.6 -C.sub.12 aryl,
- R.sup.2 and R.sup.3 are independently C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 unsaturated alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.7 -C.sub.15 aralkyl, or C.sub.6 -C.sub.12 aryl, or R.sup.2 and R.sup.3 together are C.sub.2 -C.sub.4 alkylene,
- R.sup.4 is C.sub.1 -C.sub.6 alkylene, C.sub.5 -C.sub.12 cycloalkylene, C.sub.7 -C.sub.15 aralkylene, or C.sub.6 -C.sub.12 arylene,
- R.sup.5 is C.sub.2 -C.sub.6 alkylene, C.sub.5 -C.sub.12 cycloalkylene, C.sub.7 -C.sub.15 aralkylene, or C.sub.6 -C.sub.12 arylene, and
- n is an integer of from 1 to about 100.
- 2. A process according to claim 1 additionally comprising
- (7) a compound containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of from 32 to 399.
- 3. A process according to claim 2 additionally comprising
- (8) known surface-active additives and auxiliaries.
- 4. A process according to claim 1 wherein the polymer-modified polyol is a polyurea dispersion in a polyether.
- 5. A process according to claim 1 wherein the polymer-modified polyol is an alkanolamine adduct of a diisocyanate in a polyether.
- 6. A process according to claim 1 wherein the polymer-modified polyol is a grafted polyether obtained by polymerization of acrylonitrile and/or styrene in a polyether.
- 7. A process according to claim 1 wherein the melaine has a particle size of from 5 to 50 micrometers.
- 8. A process according to claim 1 wherein the phosphonic acid ester flameproofing agent is selected from the group consisting of dimethyl methylphosphonate, dimethyl ethylphosphonate, dimethyl phenylphosphonate, dimethyl vinylphosphonate, dimethyl allylphosphonate, and bis(2-chloroethyl) 2-chloroethylphosphonate.
- 9. A process according to claim 8 wherein the melamine has a particle size of from 5 to 90 micrometers.
- 10. A process according to claim 9 additionally comprising
- (7) a compound containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of from 32 to 399.
- 11. A process according to claim 9 additionally comprising
- (8) known surface-active additives and auxiliaries.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3842384 |
Dec 1988 |
DEX |
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CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of application Ser. No. 07/416,216, filed on Oct. 2, 1989, now abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (5)
Number |
Date |
Country |
367714 |
May 1990 |
EPX |
2325648 |
Dec 1974 |
DEX |
2094315 |
Sep 1982 |
GBX |
2163762 |
Mar 1986 |
GBX |
8809351 |
Dec 1988 |
WOX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
416216 |
Oct 1989 |
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