Method and compositions for spray molding polyurethane three dimensional objects

A method of spray coating a three dimensional object with a polyurethane polymer coating, said method comprising;

• forming a premixed quasi-gel polymer precursor composition by combining an isocyanate portion and a curative portion to form said quasi-gel polymer precursor;
• spraying said quasi-gel polymer precursor composition onto said three dimensional object to be coated with the polyurethane polymer coating carrying out said spraying to build up the coating to a desired thickness and
• allowing said quasi-gel polymer precursor composition to cure thereby becoming said polyurethane polymer coating,
• wherein the curative portion includes
• a rigid polymer resin which is a combination of penta erythritol base quadra functional polyol and a polyether base triol,
• a gelling agent which is an aromatic diamine,
• a flexible polymer resin which is a polyether base triol,
• a molecular sieve drying agent which is an aluminosilicate,
• a crosslinking agent which is selected from aldimines, ketimines and oxazolidines,
• a suspension agent which is a mixture of salts from alkylamides and esters, and
• a polymerization co-catalyst which is a phenyl mercuric neodecanoate salt.

A method of spray forming a polyurethane polymer foam, said method comprising:

• forming a premixed quasi-gel polymer precursor composition by combining an isocyanate portion and a curative portion to form said quasi-gel polymer precursor;
• spraying said quasi-gel polymer precursor composition in combination with a sufficient amount of water so as to cause the quasi-get polymer precursor composition to form a foam of quasi-gel polymer precursor composition upon contact with a surface,
• allowing said foam of quasi-gel polymer precursor composition to cure thereby becoming said polyurethane polymer foam wherein the isocyanate portion includes an isocyanate polymer resin which is a mixture of 2,4 and 2,6 diphenyldiisocyanate, and
• wherein the curative portion includes
• a rigid polymer resin which is a combination of penta erythritol base quadra functional polyol and a polyester base triol,
• a gelling agent which is an aromatic diamine,
• a flexible polymer resin which is a polyether base triol,
• a crosslinking agent which is selected from aldimines, ketimines and oxazolidines,
• a suspension agent which is a mixture of salts from alkylamides and esters, and
• a polymerization co-catalyst which is a phenyl mercuric neodecanoate salt.