Detail of "3425-89-6"

Reference

Photochemical addition of maleic anhydride to 4-methyl-1,2,3,6-tetrahydrophthalic anhydride and synthesis of esters based on the addition product

Photochemical addition of maleic anhydride to 4-methyl-1,2,3,6-tetrahydrophthalic anhydride and synthesis of esters based on the addition product. Yukel'son, I. I.; Kontsova, L. V.; Chernousova, N. N.; Evsyukova, T. M. (Voronezh. Tekhnol. Inst., Voronezh, USSR). Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol., 21(1), 40-2 (Russian) 1978. CODEN: IVUKAR. ISSN: 0579-2991. DOCUMENT TYPE: Journal CA Section: 36 (Plastics Manufacture and Processing) Section cross-reference(s): 24 Plasticization of PVC [9002-86-2] or Et cellulose [9004-57-3] with 30% diallyl 6-methyl-bicyclo[4.2.0]octane-3,4,7,8-tetracarboxylic acid ester (I) [65988-99-0] increased their tensile strengths by 3100 kg/cm2. Synthesis of I involved the following steps: (1) condensation of maleic anhydride [108-31-6] with 4-methyl-1,2,3,6-tetrahydrophthalic anhydride [3425-89-6] at 50-60° during UV irradn. for 20-5 h gave 6-methyl-bicyclo[4.2.0]octane-3,4,7,8-tetracarboxylic anhydride (II) [65989-00-6], (2) the esterification of II with allyl alc. [107-18-6] gave I, in which by IR evidence both anhydride rings were opened.

Liquid acid anhydride crosslinking agents for epoxy resins

Liquid acid anhydride crosslinking agents for epoxy resins. Nakahara, Takeshi; Fujiki, Toshi (Hitachi Chemical Co., Ltd., Japan). Japan. Kokai JP 52097945 17 Aug 1977 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C07D307-89. APPLICATION: JP 76-14223 12 Feb 1976. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) Compns. of 3-25 parts of eutectic mixt. of tetrahydrophthalic anhydride (I) [85-43-8] and phthalic anhydride (II) [85-44-9] and 75-97 parts of reaction products of C4-6 dienes and II are useful as liq. crosslinking agents for epoxy resins. Thus, a mixt. of 30% of I-II eutectic and 70% of 4-methyltetrahydrophthalic anhydride [3425-89-6]-3-methyltetrahydrophthalic anhydride [5333-84-6] (m. p. of the mixt. 35°) 80, Epikote 828 [25068-38-6] 100,, and tris(dimethylaminomethyl)phenol 1 part were mixed uniformly at 160° to give a molding having heat-distortion temp. 129°, vol. resistivity 9 ′ 1015 W-cm, dielec. const. 3.6, dielec loss 0.0082, and flexural strength 14 kg/mm2.