Process for improving the mechanical properties of novolak-cured molded articles
AssigneeDynamit Nobel Aktiengesellschaft
InventorsHans Junger, Franz Weissenfels
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Abstract
A process for improving the strength and elasticity of molded articles containing inorganic oxide-type fillers and cured novolaks which includes the step of intermixing a dialkalene glycol dibenzoate with the novolak prior to curing the novolak and thereafter forming the molded articles in a conventional manner including curing with conventional agents.
Claims12
A process for increasing the strength and elasticity of molded articles consisting predominantly of inorganic, oxide-type fillers and cured novolaks, which comprises prior to the curing of the novolak containing said filler intermixing the novolak with a dialkylene glycol dibenzoate, and thereafter manufacturing the molded articles according to a conventional procedure.
A process for increasing the strength and elasticity of a molded article consisting essentially of at least one inorganic oxide-type filler and a cured novolak, which comprises intermixing a novolak resin and from 2 to 25% by weight of an dialkylene glycol dibenzoate based on the weight of the resin, said dibenzoate being represented by the formula:
- C.sub.6 H.sub.5 --COO--CH.sub.2 --(CH.sub.2).sub.x --O--(CH.sub.2).sub.x --CH.sub.2 --OOC--C.sub.6 H.sub.5 wherein x is from 1 to 4, thereafter mixing the resulting admixture of resin and dibenzoate with 4-20% by weight of hexamethylenetetramine and at least one inorganic oxide-type filler to form another admixture, the resin being in an amount between 1 and 60% by weight based on the weight of the filler, and thereafter curing and molding the another admixture with heat to produce said molded article.
Dependencies are inferred from the claim text.