Detail of "17928-31-3"

Reference

Manufacture of a,w-dialkoxyoligosiloxanes

Manufacture of a,w-dialkoxyoligosiloxanes. Takeuchi, Masaki; Endo, Mikio; Kubota, Tooru (Shinetsu Chem Ind Co, Japan). Jpn. Kokai Tokkyo Koho JP 09012720 A2 14 Jan 1997 Heisei, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: C08G077-04. ICS: C08G077-06. APPLICATION: JP 1995-187734 30 Jun 1995. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) The manuf. giving a,w-dialkoxyoligosiloxanes R5O(R62SiO)lR5 (R5 = H, alkyl; R6 = alkyl; l = 2-20) comprises reacting linear polysiloxanes X(R12SiO)nSiR12X (R1 = H, alkyl; X = OH, alkyl, trialkylsilyloxy; n 32) and/or cyclic polysiloxanes I (R2 = H, alkyl; m 33) and dialkoxysilanes R32Si(OR4)2 (R3 = H, alkyl; R4 = alkyl) in the presence of 31 catalysts selected from acids and substances which generate acids by reacting with H2O. Thus, 29.In this experiment, several chemicals are used like 17909-38-5 and 17928-31-3 6 g octamethylcyclotetrasiloxane and 48.0 g Me2Si(OMe)2 were reacted at 20-25° in the presence of trifluoromethanesulfonic acid to give MeO(Me2SiO)nMe (n = 1-6). .