Patent ID: 6248822
Filing Date: 2001-06-19
Classification: B27N,C04B,C08L

Abstract:
A method of making a composite product includes the steps of:(1) impregnating particles of an exfoliated vermiculite with an impregnating composition comprising a first thermosetting resin, an extending liquid for the first thermosetting resin, if necessary a catalyst for the first thermosetting resin, and a colouring agent for the particles;(2) removing the extending liquid;(3) subjecting the impregnated particles to suitable conditions to polymerise or cross-link the first thermosetting resin;(4) coating the particles of step (3) with a binder composition comprising a second thermosetting resin and if necessary a catalyst for the second thermosetting resin;(5) forming the particles of step (4) into a desired shape; and(6) subjecting the particles of step (5) to suitable conditions to polymerise or cross-link the second thermosetting resin to bind the particles together to form the composite product,wherein:in step (1), the vermiculite particles are impregnated with from 5% to 60% by weight of the first thermosetting resin to 100% by weight of vermiculite, andin step (4), the treated exfoliated vermiculite particles are coated with from 5% to 300% by weight of the second thermosetting resin to 100% by weight of the treated vermiculite particles.