Flame retardant composition

Patent metadata

Field	Value
Publication number	US-9631144-B2
Application number	US-201414481305-A
Country	US
Kind code	B2
Filing date	Sep 9, 2014
Priority date	May 15, 2006
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A liquid flame retardant composition which comprises one or more flame retarding agents, which are the epoxides obtainable by reacting tetrabromobisphenol A with epichlorohydrin and their end-capped derivatives represented by Formula (1) is provided. The liquid composition is especially useful in the preparation of rigid polyurethane foams.

First claim

The invention claimed is:

1. A liquid composition comprising:
A) One or more solid flame retarding agents represented by Formula 1b:

wherein n, the degree of polymerization, is an integer in the range from 0 to 5;
B) one or more liquids selected from the group consisting of polyols and esters of a pentavalent phosphorus acid; and
C) tribromoneopentyl alcohol;
said polyols comprising a polyol with a number of hydroxyl groups of not less than 3 and a hydroxyl number in a range of 150 to 850 mg KOH/g;
wherein the liquid composition is a solution in which the one or more solid flame retardants of Formula 1 b and the tribromoneopentyl alcohol are dissolved in the one or more liquids, with the bromine content of the liquid composition being not less than 25% w/w.

2. A liquid composition according to claim 1 , wherein the one or more solid flame retarding agents are in the form of a mixture comprising the individual tribromophenol-terminated compounds represented by Formula 1b wherein n is 0, 1 and 2.

3. A liquid composition according to claim 2 , wherein the weight concentrations of the tribromophenol-terminated compounds represented by Formula 1b wherein n is 0 and 1 are in the ranges of 55-70% and 20-35%, respectively, relative to the total weight of all tribromophenol-terminated compounds represented by Formula 1b in the liquid composition.

4. A liquid composition according to claim 1 , wherein the weight concentration of the one or more solid flame retarding agents represented by Formula 1b is between 10 and 60%.

5. A liquid composition according to claim 1 , comprising a polyether-polyol.

6. A liquid composition according to claim 5 , wherein the polyether-polyol is non-halogenated.

7. A liquid composition according to claim 1 , wherein said one or more liquids comprise an ester of a pentavalent phosphorus add.

8. A liquid composition according to claim 4 , which is a solution comprising 20-40 by wt % the one or more solid flame retarding agents of Formula 1b and 20-40 by wt % tribromoneopentyl alcohol.

9. A process for preparing the liquid composition of claim 1 , comprising heating one or more flame retarding agents represented by Formula 1b and tribromoneopentyl alcohol together with one or more liquids selected from the group consisting of polyols and esters of a pentavalent phosphorus acid until a clear solution is obtained, following which the liquid composition is cooled and stored until use.

10. A process, which comprises:
providing a liquid composition as defined in claim 1 ,
mixing said liquid composition with one or more polyols, and optionally with at least one blowing agent, at least one catalyst and at least one surfactant thereby affording a polyol component suitable for the preparation polyurethane or polyisacyanate foams.

11. A process according to claim 10 , which further comprises reacting the polyol component with a diisocyanate component in the presence of at least one blowing agent, at least one catalyst, at least one surfactant and at least one phosphate ester to obtain a polyurethane or polyisocyanate foam.

12. A process according to claim 11 , which is carried out on-site at the environmental temperature at the working site.

13. A process according to claim 11 , wherein the process produces a rigid polyurethane foam.

14. A rigid polyurethane foam, obtainable by the process of claim 13 , which foam comprises a structural unit prepared by reacting the diisocyanate compound with one or more of the compounds represented by Formula 1b:

wherein n is an integer in the range from 0 to 5.

Assignees

• Bromine Compounds Ltd

Inventors

• Gelmont Mark
• Peled Michael
• Alon Dina
• Frim Ron
• Bar-Yaakov Yoav

Classifications

• C08K5/06

  Ethers; Acetals; Ketals; Ortho-esters · CPC title

• C08G18/4816

  mixtures of two or more polyetherpolyols having at least three hydroxy groups · CPC title

• C08G18/582

  having halogens · CPC title

• C08G2105/02

  Chemistry & Metallurgy · mapped topic

• C09K21/08 Primary

  containing halogen · CPC title