Accession Number : AD0287970

Title :   MATERIALS. ETHEREFIED PHENOLIC RESINS. HIGH TEMPERATURE RESISTANT. DEVELOPMENT OF

Corporate Author : GENERAL DYNAMICS/CONVAIR SAN DIEGO CALIF

Personal Author(s) : GREENFIELD,G.L.

Report Date : 26 OCT 1962

Pagination or Media Count : 1

Abstract : Phenol-formaldehyde resins were prepared using both acid and base catalysis in attempting to determine which method would produce the best resin to etherify. These resins were etherified with epichlorohydrin. The etherified acid catalyzed phenol-formaldehyde resins were (based on heat deterioration test of the cured resin) superior to the base catalyzed counterpart. Acid catalyzed phenol-formaldehyde resins were etherified with allyl chloride or methallyl chloride. The resulting polymers could not be cured with free radical catalysts. Acid catalyzed phenol-formaldehyde resins etherified with epichlorohydrin and cured with p,p'-diaminodiphenyl-sulfone had good heat stability at 500 F and good adhesive properties. Comparison of this material with the best commercially available adhesive material showed the laboratory prepared adhesive to have the greater lap shear strength after aging 100 hr at 500 F. Acid-catalyzed phenol-formaldehyde resins etherified with epichlorohydrin were investigated as high temperature laminating resins. The results were unsatisfactory. (Author)

Descriptors :   *ETHERS, *FORMALDEHYDE, *HEAT RESISTANT PLASTICS, *PHASE MEASUREMENT, ACIDS, ALLYL RADICALS, CATALYSTS, CHEMICAL REACTIONS, CHLORIDES, DECOMPOSITION, DEGRADATION, HEAT, HYDROXIDES, LABORATORY EQUIPMENT, LAMINATES, STABILITY, STATIC DISCHARGERS, TEMPERATURE

Distribution Statement : APPROVED FOR PUBLIC RELEASE