Epoxidation products of 1,1,1-tri-(hydroxyphenyl) alkanes
AssigneeThe Dow Chemical Company
InventorPaul G. Schrader
Life of this patent
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Abstract
The invention comprises polyglycidyl ethers of tris(hydroxyphenyl)alkanes, their blends with other epoxy compounds and their cured products. The invention also comprises a process wherein the coupling reaction is carried out in the absence of coupling catalysts and solvents and the subsequent dehydrohalogenation is done in the presence of a methylethylketone/toluene mixture or an equivalent solvent. The epoxides of the invention have superior and unexpected high-temperature properties, without sacrificing other properties such as flex strength, flex modulus and the like.
Claims33
The epoxidation product of a phenolic compound of the formula ##STR11## wherein:
- Q is H or an alkyl group of from 1 to about 10 carbon atoms;
- each R independently represents an alkyl group of from 1 to about 12 carbon atoms, phenyl or cycloalkyl of from 3 to about 6 carbon atoms;
- each Z independently represents H or OH, with the proviso that at least one Z group on each of Rings I, II and III is OH;
- each X independently represents bromo, chloro or nitro;
- each p independently is 0, 1 or 2, each n independently is 0, 1, or 2, the sum of n+p for each ring being 0, 1, 2 or 3 when each Z is other than hydrogen,
- and an epihalohydrin of the formula:
- ##STR12## wherein X' is Cl or Br and Y is H or --CH.sub.3 ;
- said epoxidation product having an average epoxide functionality of from about 2.5 to about 6.0, or at least about 70% of theoretical for the number of available hydroxyls, whichever is greater.
Dependencies are inferred from the claim text.