Invention Grant
US07659327B2 Coated microspheres and their use 有权
涂层微球及其用途

Coated microspheres and their use
Abstract:
The invention relates to microspheres coated with a phenolic novolak resin, a process for preparing them, and their use in making foundry shapes, e.g. molds, cores, sleeves, pouring cups, etc., which are used in casting metal parts.
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