| 摘要 |
PURPOSE: Provided are improved polyepoxide resins cured with a mixture of methylene bridged poly(cycloaliphatic-aromatic)amines and a process for preparing such polyepoxide resins as well as compositions for the methylene bridged poly(cycloaliphatic-aromatic)amines and a method of making them. CONSTITUTION: In a polyepoxide resin comprising the reaction product of a polyglycidyl ether of a polyhydric alcohol having terminal 1,2 epoxy groups cured with a polyamine curative, the improvement which comprises the curative comprising a methylene bridged poly(cyclohexyl-aromatic)amine mixture herein designated Heavy MPCA, wherein the Heavy MPCA contains 3 ring and higher ring components, represented by formula(I) and formula(II), wherein R is hydrogen or methyl, x is 1-13, y is 1-13, z is 1-13, the sum of x, y and z is from 3 to 15, p is 0-14, q is 0-14, the sum of p and q is from 1-14, r is 0-14, s is 0-14, the sum of r and s is from 1-14, u is 0-14, v is 0-14, the sum of u and v is 1-14, and the total number of rings is between 3 and 15 and at least 15-40% of the Heavy MPCA is non-elutable as determined by gas chromatography at a 300 deg.C injector temperature and the Heavy MPCA comprising at least a portion of the polyamine curative.
|
