Polyol-fluorocarbon-aminetriol blend and polyisocyanurate foams therefore

In a process for the preparation of a cellular polymer in which the major recurring polymer unit is an isocyanurate moiety said process comprising the trimerization of an organic polyisocyanate in the presence of a minor amount of a polyol, a blowing agent, and a trimerization catalyst, the improvement which comprises preparing said cellular polymer by bringing together:

• A. an organic polyisocyanate;
• and
• B. from about 10 to about 120 parts by weight per equivalent of said polyisocyanate of a blend comprising:
• (a) about 2 to about 20 percent by weight of a polyisocyanate trimerization catalyst, and
• (b) about 80 to about 98 percent by weight of a mixture comprising:
• 1. about 20 to about 80 percent by weight of a fluorocarbon blowing agent, and
• 2. about 20 to about 80 percent by weight of a polyol component comprising an amine triol or mixture of amine triols having the formula ##STR8## wherein R is an aliphatic radical having from 8 to 18 carbon atoms, inclusive, each R.sub.1 is independently selected from the group consisting of hydrogen and methyl, x, y, and z each independently have an average value from about 1 to about 5 inclusive, and n is 2 or 3;
• and provided the total hydroxyl equivalents present in said blend (B) are within a range of from about 0.05 to about 0.5 equivalent per equivalent of said polyisocyanate.

In a process for the preparation of a cellular polymer in which the major recurring polymer unit is an isocyanurate moiety said process comprising the trimerization of an organic polyisocyanate in the presence of a minor amount of a polyol, a blowing agent, and a trimerization catalyst, the improvement which comprises preparing said cellular polymer by bringing together:

• A. an organic polyisocyanate;
• and
• B. from about 10 to about 120 parts by weight per equivalent of said polyisocyanate of a miscible blend comprising:
• (a) about 2 to about 20 percent by weight of a polyisocyanate trimerization catalyst, and
• (b) about 80 to about 98 percent by weight of a mixture comprising:
• 1. at least about 20 percent by weight of a fluorocarbon blowing agent, and
• 2. the balance being a polyol blend comprising (i) from about 20 percent to about 85 percent by weight of said polyol blend of an amine triol or mixture of amine triols having the formula ##STR9## wherein R is an aliphatic radical having from 8 to 18 carbon atoms, inclusive, x, y, and z each independently have an average value between about 1 and about 5 inclusive, n is 2 or 3 and (ii) from about 15 percent to about 80 percent by weight of a primary hydroxyl polyol having a molecular weight of from about 60 to about 1000;
• and provided the total hydroxyl equivalents present in said blend (B) are within a range of from about 0.05 to about 0.5 equivalent per equivalent of said polyisocyanate.

A process for the preparation of a cellular polymer in which the major recurring polymer unit is an isocyanurate moiety said process comprising bringing together:

• A. a polymethylene polyphenyl polyisocyanate;
• and
• B. from about 10 to about 120 parts by weight per equivalent of said polyisocyanate of a miscible blend comprising:
• (a) about 2 to about 20 percent by weight of a polyisocyanate trimerization catalyst, and
• (b) about 80 to about 98 percent by weight of a mixture comprising:
• 1. at least about 20 percent by weight of a fluorocarbon blowing agent, and
• 2. the balance being a polyol blend comprising (i) from about 20 percent to about 85 percent by weight of said polyol blend of an amine triol mixture having the general formula ##STR10## said mixture being derived from cocoamine and each member of the mixture has x, y, and z average values of about 4.6, and n is 3;
• and (ii) from about 15 percent to about 80 percent by weight of a primary hydroxyl diol having a molecular weight of from about 60 to about 800;
• and
• provided the total hydroxyl equivalents present in said blend (B) are within a range of from about 0.05 to about 0.5 equivalent per equivalent of said polyisocyanate.