Reference

Compositions for corrosion-resistant, fiber-reinforced plastics

Compositions for corrosion-resistant, fiber-reinforced plastics. Nomaguchi, Kanemasa; Tsujino, Kazuyuki; Uchigasaki, Isao; Tanno, Takeshi (Hitachi Chemical Co., Ltd., Japan). Japan. Kokai JP 52151396 15 Dec 1977 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08G018-58. APPLICATION: JP 76-68926 11 Jun 1976. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) Polyfunctional epoxy compds., polyfunctional isocyanates, and catalysts forming hetero rings are mixed with fibrous materials. Thus, 30 glass cloths were impregnated with a mixt. (17 cSt viscosity at 40°) of DER 332 [25085-99-8] (epoxy equiv 174 and 5000 cP viscosity at 25°) 100, 4,4'-diphenylmethane diisocyanate [101-68-8] 174, and N-methylmorpholine [109-02-4] 0.27 g, press-molded 1 h at 160° and 80 kg/cm2, coated with the above mixt., and baked 1 h at 160° to give a specimen showing no change during 1 mo. at 100° in 20% H2SO4.

Fire- and heat-resistant epoxy resins

Fire- and heat-resistant epoxy resins. Miyadera, Yasuo; Yokoyama, Takashi; Sugawara, Yasuhide; Suzuki, Hiroshi; Numata, Shunichi; Yokono, Hitoshi (Hitachi, Ltd., Japan). Japan. Kokai JP 53030697 23 Mar 1978 Showa, 10 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08G018-58. APPLICATION: JP 76-104254 2 Sep 1976. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) A fire- and heat-resistant resin contg. isocyanurate and oxazolidone rings is prepd. from 1 equiv epoxy resins, 7-40 equiv polyisocyanates, and 0.01-5% heterocyclic ring-forming catalysts. Thus, a mixt. of bisphenol A diglycidyl ether 8, tetrabromobisphenol A diglycidyl ether 2, diphenylmethane 4,4'-diisocyanate 100, N-methylmorpholine [109-02-4] 2.2, and indole [120-72-9] 1.0 g was heated 3 h at 80°, 10 h at 80-170°, and 16 h at 170° to give a fire-resistant cured polymer [53160-38-6] with glass-transition temp. 3200°, fire resistance rating V-0 (UL 94), and thermal expansion coeff. 6.5 ′ 10-5.