Abstract: A composite material wherein a mixture of a phenolic or furan resin and an inorganic filler as matrix materials is incorporated in an inorganic fiber or heat-resistant organic fiber in the form of a long fiber bundle. The composite material has excellent characteristics such as heat resistance, strength and alkali resistance. The present invention can provide substitutes used in place of concrete reinforcing steel bars or steel frames which can be used in structures for building and civil engineering.

Abstract: This invention is concerned with foundry binder compositions for alkaline aggregates such as reclaimed sand, Olivia sand, alumina sand, etc., which cure at ambient temperatures. The binder composition is composed of phenolic resins, polyisocyanates and a hydrogen chloride emitting substance upon hydrolysis. Curing of this composition is by gaseous amines. The hydrogen chloride emitting substance on hydrolysis is selected from the following: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 can be selected from: Hydrogen, Chlorine, alkyl, vinyl or alkoxy, or(b) Thionyl chloride, sulfuryl chloride, acid chlorides of sulfur, such as methyl chlorosulfuric acid, ethyl chloroculfuric acid.

Abstract: A cold-curing binder for foundry sand cores and molds comprises (a) an oil-modified alkyd resin, said resin characterized by an oil component which comprises a mixture of tall oil fatty acid and linseed oil in the ratio of from about 20:80 to about 80:20 parts by weight, (b) a polyisocyanate component, and (c) a curing accelerator. The novel binders of this invention generate less objectionable odor during the casting operation and cure more rapidly than conventional binders.