Claims
- 1. A process for producing flame-resistant polyurethane foams comprising reacting
- a) organic and/or modified organic isocyanates with
- b) at least one relatively high molecular weight compound containing at least two reactive hydrogen atoms and, optionally,
- c) low molecular weight chain extenders and/or crosslinkers in the presence of
- d) blowing agents,
- e) catalysts,
- f) a flame retardant and, optionally,
- g) further auxiliaries and/or additives,
- wherein the equivalence ratio of the NCO groups of component a) to the sum of reactive hydrogen atoms of components b) and c) is 0.8-1.25:1 and said flame retardant comprises melamine in combination with at least one primary and/or secondary amine selected from the group consisting of 2,2-dimethyl-4,4'-methylenebicyclohexylamine, coconut fatty amine and N-oleylpropylenediamine and at least one organic and/or modified organic isocyanate.
- 2. A process as claimed in claim 1, wherein the melamine is added to a polyol component comprising component b), then at least one amine is mixed in and subsequently at least one organic and/or modified organic isocyanate is introduced.
- 3. A process as claimed in claim 1, wherein the proportion of melamine in the polyol component is from 1 to 50 percent by weight.
- 4. A process as claimed in claim 1, wherein the particle size of melamine is from 1 to 100 .mu.m.
- 5. A process as claimed in claim 1, wherein the amines comprise primary and/or secondary amines.
- 6. A process as claimed in claim 1, wherein the amines comprise aliphatic and/or cycloaliphatic amines.
- 7. A process as claimed in claim 1, wherein the amines are used in amounts of from 0.05 to 5 percent by weight, based on the weight of the polyol component.
- 8. A process as claimed in claim 1, wherein the organic and/or modified organic isocyanates comprise aromatic isocyanates.
- 9. A process as claimed in claim 1, wherein the organic and/or modified organic isocyanates comprise prepolymers containing NCO groups.
- 10. A process as claimed in claim 1, wherein the organic and/or modified organic isocyanates are used in amounts of from 0.05 to 5 percent by weight, based on the weight of the polyol component.
- 11. A process for producing flame-resistant polyurethane foams comprising reacting
- a) organic and/or modified organic isocyanates with
- b) a polyol component comprising at least one relatively high molecular weight compound containing at least two reactive hydrogen atoms and a flame retardant, and, optionally, low molecular weight chain extenders and/or crosslinkers in the presence of blowing agents, catalysts, and further auxiliaries and/or additives,
- wherein the equivalence ratio of the NCO groups of component a) to the sum of reactive hydrogen atoms of components b) and c) is 0.8-1.25:1 and said flame retardant comprises melamine in combination with at least one primary and/or secondary amine selected from the group consisting of 2,2-dimethyl-4,4'-methylenebicyclohexylamine, coconut fatty amine and N-oleylpropylenediamine and at least one organic and/or modified organic isocyanate.
- 12. A process as claimed in claim 11, wherein the melamine is added to a polyol component comprising component b), then at least one amine is mixed in and subsequently at least one organic and/or modified organic isocyanate is introduced.
- 13. A process as claimed in claim 11, wherein the proportion of melamine in the polyol component is from 1 to 50 percent by weight.
- 14. A process as claimed in claim 11, wherein the particle size of melamine is from 1 to 100 .mu.m.
- 15. A process as claimed in claim 11, wherein the amines comprise primary and/or secondary amines.
- 16. A process as claimed in claim 11, wherein the amines comprise aliphatic and/or cycloaliphatic amines.
- 17. A process as claimed in claim 11, wherein the amines are used in amounts of from 0.05 to 5 percent by weight, based on the weight of the polyol component.
- 18. A process as claimed in claim 11, wherein the organic and/or modified organic isocyanates comprise aromatic isocyanates.
- 19. A process as claimed in claim 11, wherein the organic and/or modified organic isocyanates comprise prepolymers containing NCO groups.
- 20. A process as claimed in claim 11, wherein the organic and/or modified organic isocyanates are used in amounts of from 0.05 to 5 percent by weight, based on the weight of the polyol component.
Priority Claims (1)
Number |
Date |
Country |
Kind |
196 42 246 |
Oct 1996 |
DEX |
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Parent Case Info
This application is a division of application Ser. No. 08/949,599, filed Oct. 14, 1997.
US Referenced Citations (14)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0 358 427 |
Mar 1990 |
EPX |
0 397 035 |
Nov 1990 |
EPX |
288 828 A5 |
Nov 1989 |
DEX |
WO 9307193 |
Apr 1993 |
WOX |
Non-Patent Literature Citations (1)
Entry |
Polyurethane Division--SPI Sep. 26-29, 1995. |
Divisions (1)
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Number |
Date |
Country |
Parent |
949599 |
Oct 1997 |
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