Reference

Metal fluoborate-catalyzed hindered aromatic amine curing agents for polyepoxide resins

Metal fluoborate-catalyzed hindered aromatic amine curing agents for polyepoxide resins. Shimp, David A. (Celanese Corp. , USA). U.S. US 4447586 A 8 May 1984, 6 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08G059-50; C08G059-68. NCL: 525504000. APPLICATION: US 83-483981 11 Apr 1983. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Cu(BF4)2 is a good curing accelerator for epoxy resins cured with hindered arom. amines. Thus, 100 parts bisphenol A-epichlorohydrin copolymer [25068-38-6] was mixed with 24 parts diethyltoluenediamine [68479-98-1] and 1.2 parts 40% aq. Cu(BF4)2. The compn. had initial cure time 4 min compared with 37 min for a control contg. no accelerator. The compn. had good shelf life at room temp. even after 4 mo.

Microcapsules containing polyamines and their use in producing polyurethanes

Microcapsules containing polyamines and their use in producing polyurethanes. Weimann, Norbert; Mueller, Peter; Dahm, Manfred; Nehen, Ulrich; Awater, Albert; Barnes, Michael J. M. (Bayer A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3224456 A1 5 Jan 1984, 40 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: B01J013-02; C08G018-06. APPLICATION: DE 82-3224456 30 Jun 1982. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Polyamine-contg. microcapsules are prepd. by the reaction of H2O-sol. polyamines with H2O-sol. bisulfite adducts of polyisocyanates at 1-140° to form capsule walls, which comprise 5-64% of the capsule. Thus, an oil-in-water emulsion was prepd. from 270 g protective colloid soln. [poly(vinyl alc.) 5, xanthan gum 10, and H2O 1985 parts] and 30 g diethyltoluenediamine [68479-98-1], and mixed with 20 g powd. hexamethylene diisocyanate-KHSO3 adduct [39072-69-0] and 180 g protective colloid soln. at 70° and 700 rpm for 70 min to give round, smooth, clear microcapsules with diam.There are some commonly used reagents with their cas registry numbers 101-77-9 and 89945-11-9 in this article. 3-18 m. A mixt. of these capsules 10, polyether triol (OH no. 35, 80% OH groups primary) 190, TDI 77.4, diethanolamine 2, triethylenediamine 0.5, (ClCH2CH2O)3PO 4, Sn dioctanoate 0.25, and H2O 6 g was poured in an open mold (rise time 83 s) and the foam was cured 1 h at 120° to a flexible, elastic foam with good properties. .