Reference

Process for preparation of novel trialkoxysilanes with urea derivatives as functional groups

Process for preparation of novel trialkoxysilanes with urea derivatives as functional groups. Airoldi, Claudio; Ricardo da Silva, Cesar (Universidade Estadual de Campinas - Unicamp, Brazil). Braz. Pedido PI BR 9903110 A 6 Mar 2001, 30 pp. (Portuguese). (Brazil). CODEN: BPXXDX. CLASS: ICM: C07F007-18. APPLICATION: BR 1999-3110 24 Jun 1999. DOCUMENT TYPE: Patent CA Section: 29 (Organometallic and Organometalloidal Compounds) Title compds. are prepd. by reaction of precursor triethoxy(isocyanatopropyl)silane (EtO)3Si(CH2)3NCO with aliph. amines having various chain lengths Me(CH2)xNH2 (x = 2,3,4,5, etc.) by nucleophilic attack of the NH2 group on the isocyano group until complete conversion to give silanes (EtO)3Si(CH2)3NHCONH(CH2)xMe contg. a new urea deriv. NH(CO)NH functional group. The synthetic route involves (1) dissolving 0.121 mol of the resp. amine in 50 mL PhMe in a round-bottomed flask and stirring the mixt. under an N atm.; (2) gradual addn. by dropping funnel of 0.121 mol (30 mL) (EtO)3Si(CH2)3NCO in 30 mL PhMe; (3) stirring the mixt. at 3 h at room temp.; and (4) removing the solvent in vacuo at 18 mm Hg, whereupon the viscous liq. thus formed crystallizes to give a white solid. In examples given, 0.121 mol (EtO)3Si(CH2)3NCO reacts with 0.121 mol Me(CH2)xNH2 (x = 2, 4, 6, 11) in PhMe to give (EtO)3Si(CH2)3NHCONH(CH2)xMe (same x), for which IR, NMR and mass spectral data are reported. Keywords silane urea functionalized triethoxy prepn Index Entries Amines, reactions aliph.; carbamoylation of triethoxy(isocyanatopropyl)silane with aliph. amines Silanes alkoxy; prepn. of trialkoxysilanes functionalized by ureas Carbamoylation of triethoxy(isocyanatopropyl)silane with aliph. amines 107-10-8, reactions 109-73-9, reactions 110-58-7 111-26-2 111-68-2 124-22-1 24801-88-5 119789-80-9 126740-02-1 390777-09-0 390777-11-4 carbamoylation of triethoxy(isocyanatopropyl)silane with aliph. amines

Adhesives for corrugated cardboards

Adhesives for corrugated cardboards. Hirashima, Susumu; Nakai, Takeshi; Tokuda, Masahiro; Kikuchi, Kazunori (Hohnen Oil Co., Ltd., Japan). Japan. Kokai JP 51128333 9 Nov 1976 Showa, 3 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C09J003-06. APPLICATION: JP 75-53060 1 May 1975. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Fabrication and Uses) A starch compn. contg. a tannin and an amine, useful as an adhesive for corrugated cardboard, is prepd.Several substances with their cas registry numbers 109-76-2 and 9005-25-8 may be metioned in this study. Thus, 30 kg corn starch was dissolved in 200 L H2O, mixed with 11 kg NaOH dissolved in 20 L H2O, stirred 15 min at 71.degree., and mixed with 180 L cold H2O to give a starch soln., which was mixed 15 min with a soln. contg. 100 L H2O, 20 kg amylamine [110-58-7], 6.5 kg borax, 20 kg tannins, and 300 kg corn starch, giving a viscous liq. useful as an adhesive for corrugated cardboards. .