Patent GB-933713-A (GB)
Title: Improvements in or relating to the manufacture of polyurethane materials
Inventor: CHAPMAN JOHN FREDERICK
IPC: C08G18/50
Filed: 1959-08-27
Abstract: The process of the parent Specification is modified by the use of the polyether containing two or more hydroxyl groups and at least one tertiary amino group in the form of an acid or neutral salt with an organic carboxylic acid or an alkyl phosphoric acid. Suitable acids are formic, acetic, benzoic, salicylic, oxalic, malonic, succinic, glutaric, adipic, phthalic and glycollic acids. In the mono- or dialkyl phosphoric acid esters the alkyl groups may be ethyl, propyl, butyl, amyl, lauryl and stearyl.  Mixtures of acids can be used.  The salts can be prepared by direct reaction or in situ (i.e. by addition of a mixture of the amino group-containing polyether and the acid to one of the polyurethaneforming components).  Preferably not less than one equivalent and not more than 4 equivalents of acid for each tertiary amino group are employed.  The polyethers themselves can be prepared by the methods referred to in the main Specification. In the preparation of the polyurethanes the salt of the amino-containing polyether can be used in admixture with hydroxy group-containing polymers free from tertiary amino groups, for example polyesters, polyesteramides and polyethers.  Additional ingredients of the reaction mixture can be those referred to in the main Specification. In Example (1) a liquid polyether salt is prepared by reacting adipic acid with oxypropylated triethanolamine of M.W. 400 at 80 DEG C. There are added water, tri-b -chlorethyl phosphate, an octyl-cresol/ethylene oxide reaction product and a diphenylmethane diisocyanate (from crude diaminodiphenylmethane containing polyamines) and the mixture reacts to give a foamed product. Specifications 842,154 and 848,671 are referred to.ALSO:The process of the parent Specification is modified by the use of the polyether containing two or more hydroxyl groups and at least one tertiary amino group in the form of an acid or neutral salt with an organic carboxylic acid or an alkyl phosphoric acid. Suitable acids are formic, acetic, benzoic, salicyclic, oxalic, malonic, succinic, glutaric, adipic, phthalic and glycollic acids.  In the mono-or dialkyl phosphoric acid esters the alkyl groups may be ethyl, propyl, butyl, amyl, lauryl and stearyl. Mixtures of acids can be used.  The salts can be prepared by direct reaction or in situ (i.e. by addition of a mixture of the amino group-containing polyether and the acid to one of the polyurethane-forming components).  Preferably not less than one equivalent and not more than 4 equivalents of acid for each tertiary amino group are employed.  The polyethers themselves can be prepared by the methods referred to in the parent Specification.  In the preparation of the polyurethanes the salt of the amino-containing polyether can be used in admixture with hydroxy group-containing polymers free from tertiary amino groups, for example, polyesters, polyesteramides and polyethers. Additional ingredients of the reaction mixture can be those referred to in the main Specification. In Example (1) a liquid polyether salt is prepared by reacting adipic acid with oxypropylated triethanolamine of M.W.400 at 80 DEG C. There are added water, tri-b -chlorethyl phosphate, an octyl-cresol/ethylene oxide reaction product and a diphenylmethane diisocyanate (from crude diaminodiphenylmethane containing polyamines) and the mixture reacts to give a foamed product. Specifications 842 154 and 848,671 also are referred to.