Halogen-free, flame-retardant polyurethane foams
First Claim
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1. A flame-retardant polyurethane foam comprising, as flame retardant halogen-free tetraalkyl bisphosphates being free from hydoxy groups and having molar mass at least 350 g/mol.
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Abstract
The present invention relates to flame-retardant polyurethane foams which comprise, as flame retardant, halogen-free bisphosphates free from hydroxy groups.
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8 Claims
- 1. A flame-retardant polyurethane foam comprising, as flame retardant halogen-free tetraalkyl bisphosphates being free from hydoxy groups and having molar mass at least 350 g/mol.
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7. A process for production of flame-retardant polyurethane foams via reaction of organic polyisocyanates with compounds having at least two hydrogen atoms reactive towards isocyanates, and conventional blowing agents, stabilizers, activators and/or other conventional auxiliaries and additives at from 20 to 80°
- C., wherein an amount of from 0.5 to 30 parts, based on 100 parts of a polyol component, of a halogen-free tetraalkyl biphosphate with a molar mass at least at 350 g/mol and being free from hydroxy groups used as flame retardant.
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