Detail of "17689-77-9"

Reference

Polyorganosiloxane compositions hardenable to elastomers at room temperature

Polyorganosiloxane compositions hardenable to elastomers at room temperature. Wuerminghausen, Thomas; Saykowski, Franz; Sattlegger, Hans (Bayer A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3323911 A1 3 Jan 1985, 22 pp. (German). (Germany). CODEN: GWXXBX. CLASS: ICM: C08L083-04. ICS: C08L067-00; C08L069-00; C08K003-36; C08K005-54; C09K003-10. APPLICATION: DE 83-3323911 2 Jul 1983. DOCUMENT TYPE: Patent CA Section: 39 (Synthetic Elastomers and Natural Rubber) Moisture-curable compns. giving vulcanizates with good mech. properties and gloss contain siloxanes with reactive end groups, polyesters (optionally carboxylated, urethanized, or silylated), and optionally hydrolyzable silanes, thickener-fillers, and other additives. Thus, mixing an OH-terminated di-Me siloxane (viscosity 50 Pa-s) 64.6, poly(hexamethylene phthalate) isodecyl ester [95471-22-0] (OH no. 8.8, viscosity 1.2 Pa-s) 25, EtSi(OAc)3 [17689-77-9] 4.0, (EtO)4Si [78-10-4] 0.9, pyrolytic SiO2 (sp. surface 110 m2g) 5.5, and Bu2Sn(OAc)2 0.01 g gave a storage-stable paste with a glossy surface. Exposing a 2-mm layer of this paste to air for 1 wk gave a vulcanizate with tensile strength 0.34 MPa, elongation 417%, 100% modulus 0.14 MPa, and Shore A hardness 12.

Cellulose ethers with improved dispersion behavior

Cellulose ethers with improved dispersion behavior. Felcht, Utz Hellmuth; Berenbold, Helmut (Hoechst A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3232467 A1 1 Mar 1984, 21 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C08B015-05. APPLICATION: DE 82-3232467 1 Sep 1982. DOCUMENT TYPE: Patent CA Section: 43 (Cellulose, Lignin, Paper, and Other Wood Products) Treatment of cellulose ethers with silane derivs. 2031-67-6 and 17980-64-2 which are cas registry numbers are also used here. gave products dispersible in H2O. Thus, a mixt. of 20% hydroxyethyl cellulose (I) [9004-62-0] [Hoppler viscosity 70,000 mPa-s at 20° (1.2% aq. soln.), and mol. substitution 2.5] 3150, ethyltriacetoxysilane (II) [17689-77-9] 6.3, and iso-PrOH 200 parts was stirred for 30 min, dried for 50 min at 80°, and pulverized to give II-modified I which was insol. in H2O at pH 7 but dissolved in H2O at pH 1 within 1.8 and 9.0 min. .