Stabilization of halogenated polyols for polyurethane production

Claim 2

A stabilized premix composition for preparation of fire retardant polyurethane foam by reaction with a tertiary amine polyurethane catalyst and an organic isocyanate, said composition being stable as to deactivation of said catalyst and comprising: a halogenated polyol, said catalyst, and a stabilizing amount of a vinyl monomer compound, said monomer being a condensation product of acrylic or methacrylic acid with an alcohol or amine.

Claim 3

A stabilized premix composition as defined in claim 1 wherein said vinyl monomer compound corresponds to the formula from the group consisting of ##STR5## wherein R is H or CH 3 ; R 1 is H, an alkyl radical of 1 to 4 carbon atoms, a hydroxyalkyl radical of 2 to 3 carbon atoms or a substituted aminoalkyl group of the formula ##STR6## wherein each R 3 is independently an alkyl radical of 1 to 4 carbon atoms, or a hydroxyalkyl radical of 2 to 3 carbon atoms and p is 2 to 4; ##STR7## wherein each R 4 is independently an alkyl radical of 1 to 4 carbon atoms m is 1 and n is 1 to 12; provided that n is 2 when Y is OH or ##STR8## B is hydrogen or an alkyl radical of 2 to 4 carbon atoms, r is 3 or 4, t being zero when r is 4 and t being one when r is 3.

Claim 4

A stabilized premix composition as defined in claim 1 wherein said vinyl monomer is dimethylamino ethyl acrylate.

Claim 5

A stabilized premix composition as defined in claim 1 wherein said vinyl monomer is dimethylamino ethyl methacrylate.

Claim 6

A stabilized premix composition as defined in claim 1 wherein said vinyl monomer is isobutyl methacrylate.

Claim 7

A stabilized premix composition as defined in claim 1 wherein said tertiary amine catalyst is dimethylethanolamine.

Claim 8

A stabilized premix composition as defined in claim 1 wherein said halogenated polyol is a chlorinated polyether polyol having a hydroxyl number of about 365±10 and containing about 47% by weight of chemically bound chlorine.

Claim 9

A stabilized premix composition for preparation of fire retardant polyurethane foam by reaction with organic isocyanate, said composition comprising in parts by weight: ______________________________________ halogenated polyether polyol 100 chlorofluorocarbon blowing agent 45 dimethylethanolamine 3.5 vinyl monomer 2 to 4 ______________________________________ said vinyl monomer corresponding to a formula from the group consisting of ##STR9## wherein R is H or CH 3 ; R 1 is H, an alkyl radical of 1 to 4 carbon atoms or a hydroxyalkyl radical of 2 to 3 carbon atoms; R 2 is an alkyl radical of 1 to 4 carbon atoms, a hydroxyalkyl radical of 2 to 3 carbon atoms or a substituted aminoalkyl group of the formula ##STR10## wherein each R 3 is independently an alkyl radical of 1 to 4 carbon atoms or a hydroxyalkyl radical of 2 to 3 carbon atoms, and p is 2 to 4; ##STR11## wherein each R 4 is independently an alkyl radical of 1 to 4 carbon atoms m is 1, and n is 1 to 12; provided that n is 2 when Y is OH or ##STR12## B is hydrogen or an alkyl radical of 2 to 4 carbon atoms, r is 3 or 4, t being zero when r is 4 and t being one when r is 3.

Claim 10

A stabilized premix composition for preparation of fire retardant polyurethane foam by reaction with organic isocyanate, said composition comprising in parts by weight: ______________________________________ halogenated polyether polyol 100 chlorofluorocarbon blowing agent 45 dimethylethanolamine 3.5 vinyl monomer 2 to 4 ______________________________________ said vinyl monomer corresponding to a formula from the group consisting of ##STR9## wherein R is H or CH 3 ; R 1 is H, an alkyl radical of 1 to 4 carbon atoms or a hydroxyalkyl radical of 2 to 3 carbon atoms; R 2 is an alkyl radical of 1 to 4 carbon atoms, a hydroxyalkyl radical of 2 to 3 carbon atoms or a substituted aminoalkyl group of the formula ##STR10## wherein each R 3 is independently an alkyl radical of 1 to 4 carbon atoms or a hydroxyalkyl radical of 2 to 3 carbon atoms, and p is 2 to 4; ##STR11## wherein each R 4 is independently an alkyl radical of 1 to 4 carbon atoms m is 1, and n is 1 to 12; provided that n is 2 when Y is OH or ##STR12## B is hydrogen or an alkyl radical of 2 to 4 carbon atoms, r is 3 or 4, t being zero when r is 4 and t being one when r is 3.

Claim 11

Stabilized premix composition as defined in claim 8, further containing 20 parts of an amino polyol for reducing surface friability of polyurethane foam, said amino polyol having a hydroxyl number of 600±10 and a viscosity of 280 cps at 25° C.

Claim 12

Stabilized premix composition as defined in claim 9, further containing a cell-stabilizing siloxane compound.

Claim 13

A stabilized premix composition as defined in claim 1 wherein said tertiary amine catalyst is dimethylaminoethyl morpholine.