Flame retardant, self-extinguishing polyurethanes and polyurethane foams

• US 4,585,806 A
• Filed: 12/12/1984
• Issued: 04/29/1986
• Est. Priority Date: 09/17/1981
• Status: Expired due to Fees

• Current Assignee: Ethyl Corporation (Newmarket Corporation)
• Original Assignee: Ethyl Corporation (Newmarket Corporation)
• Inventors: Barda, Henry J.
• Primary Examiner(s): Lovering, Richard D.
• Application Number:
  US06/680,928
• Time in Patent Office: 503 Days
• Field of Search: 252/609, 260/DIG. 24, 521/166, 528/73
• US Class Current: 521/166
• CPC Class Codes: C08G 18/3846 containing imide groups C08G18/3821 takes precedence
• CPC Class Codes: Y10S 260/24 Flameproof
• CPC Class Codes: Y10S 428/921 Fire or flameproofing

Abstract

A reactive fire retardant mixture useful in the preparation of polyurethane foams. The mixture contains a halogenated imide-containing polyol having the formula: ##STR1## and the corresponding ether having the formula: ##STR2## wherein R is a hydrocarbon group having the valance n+2 and is selected from the group consisting of benzene groups, naphthalene groups and alicyclic hydrocarbon groups containing 5 to 10 carbon atoms, R'"'"' is an aliphatic hydrocarbon group containing 3-12 carbon atoms, X is selected from the group consisting of bromine and chlorine, n is an integer from 1-6 and p is an integer from 2-6. They are prepared by reacting an alcohol (e.g. isopropyl alcohol), a halogenated dicarboxylic anhydride (e.g. tetrabromophthalic anhydride) and an aminopolyol (e.g. 2-amino-2-ethyl-1,3-propanediol).

Claims

1. A flame retardant, self-extinguishing polyurethane comprising the reaction product of

(a) a reactive fire retardant mixture comprising about 1-99 weight percent of a halogenated imide-containing polyol having the formula:

##STR21## and about 99-1 weight percent of the corresponding ether having the formula;

##STR22## wherein R is a hydrocarbon group having the valence n+2 and is selected from the group consisting of benzene groups, naphthalene groups and alicyclic hydrocarbon groups containing 5 to 10 carbon atoms, R'"'"' is an aliphatic hydrocarbon group containing 3-12 carbon atoms, X is selected from the group consisting of bromine and chlorine, n is an integer from 1-6 and p is an integer from 2-6 said mixture being about 2-40% of said polyurethane,

(b) a polyisocyanate in an amount that is 80-150% of the stoichiometric amount required to react with all reactive H atoms on hydroxyl and amine groups and

(c) optionally, a polyol and/or polyamine.

2. A polyurethane, as recited in claim 1, wherein said reactive fire retardant mixture comprises a halogenated imide-containing polyol having the formula:

##STR23## and an ether having the formula;

##STR24##

3. A polyurethane foam made by the process of reacting a mixture comprising

(a) a reactive fire retardant mixture comprising about 1-99 weight percent of a halogenated imide-containing polyol having the formula:

##STR25## and about 99-1 weight percent of the corresponding ether having the formula;

##STR26## wherein R is a hydrocarbon group having the valence n+2 and is selected from the group consisting of benzene groups, naphthalene groups and alicyclic hydrocarbon groups containing 5 to 10 carbon atoms, R'"'"' is an aliphatic hydrocarbon group containing 3-12 carbon atoms, X is selected from the group consisting of bromine and chlorine, n is an integer from 1-6 and p is an integer from 2-6.

(b) a non-halogenated polyol,

(c) a polyisocyanate,

(d) a catalyst,

(e) a blowing agent and

(f) a surfactant.

4. A polyurethane foam, as recited in claim 3, wherein said fire retardant mixture comprises about 1-99 weight percent of a halogenated imide-containing polyol having the formula:

##STR27## and about 99-1 weight percent of an ether having the formula;

##STR28##

5. A flame retardant, self-extinguishing polyurethane characterized by having chemically bonded within its structure the flame retardant group:

##STR29## wherein R is a hydrocarbon group having the valence n+2 and is selected from the group consisting of benzene groups, naphthalene groups and alicyclic hydrocarbon groups containing 5 to 10 carbon atoms, R'"'"' is an aliphatic hydrocarbon group containing 3-12 carbon atoms, X is selected from the group consisting of bromine and chlorine, n is an integer from 1-6 and p is an integer from 2-6.

6. A flame retardant self-extinguishing polyurethane of claim 5 wherein said flame retardant group is ##STR30##