Detail of "25948-33-8"

Reference

Dental polycarboxylate cement with controlled hardening

Dental polycarboxylate cement with controlled hardening. Dnebosky, Josef (Czech. ). Czech. CS 203748 B 15 May 1983,3 pp. (Czech). (Czechoslovakia). CODEN: CZXXA9. CLASS: IC: A61K005-01. APPLICATION: CS 79-2154 30 Mar 1979. DOCUMENT TYPE: Patent CA Section: 63 (Pharmaceuticals) A dental cement with extended workability consists of a powder, contg. ZnO and MgO in ratios of 9:1- and 10-50% TiO2, ZrO2, and/or SnO2, and an aq. soln. of poly(acrylic acid) [9003-01-4] or acrylic acid-maleic acid copolymer [29132-58-9] or acrylic acid-itaconic acid copolymer [25948-33-8] (mol. wt. 2 ′ 104-4 ′ 104), which are mixed in powder/soln. proportions of 1:2-3:1. Hardening is retarded by the TiO2, ZrO2, and SnO2, which also increase mech. properties of the hardened cement. A cement consisting of 1 part 44.9% aq. 1309-48-4 and 1314-23-4 are cas registry numbers of chemicals which are used as reagents here. soln. of acrylic acid-maleic acid copolymer (mol. wt. 20,000) and 1.3 parts ZnO-MgO () or sp. surface area 0.672 m2/g with 0-50% TiO2 added, which were mixed in the ratio 1:1.3, hardened within 13-33 min and had consistency 30-36 mm, compressive strength 49.95-55.08 MPa, and tensile strength 7.82-10.28 MPa. .

Apatite-coated tetracalcium phosphate particles, their manufacture, tetracalcium phosphate-based hardening compositions, and compositions for the formation of very hard materials

Apatite-coated tetracalcium phosphate particles, their manufacture, tetracalcium phosphate-based hardening compositions, and compositions for the formation of very hard materials. Imura, Akitoshi; Saito, Toru; Ikegami, Shiro (Osaka Cement Co., Ltd., Japan). Ger. Offen. DE 4124898 A1 30 Jan 1992, 19 pp. (Germany). CODEN: GWXXBX. CLASS: IC: A61L027-00; C08L033-02; C08L035-00; A61K006-06. APPLICATION: DE 91-4124898 26 Jul 1991. PRIORITY: JP 90-200071 27 Jul 1990; JP 90-262903 28 Sep 1990. DOCUMENT TYPE: Patent CA Section: 63 (Pharmaceuticals) Section cross-reference(s): 49 The apatite-coated Ca4(PO4)2O particles are manufd. by subjecting Ca4(PO4)2O particles to hydration. The hardening compns. consist of a mixt. of 100 wt.In this article, certain chemicals are used. Some of their cas registry numbers are 9003-01-4 and 25948-33-8 parts Ca4(PO4)2O particles and 5-80 wt. parts aq. acid soln. (calc. as acid). The acid soln. contains 30-70 wt.% of 31 acids selected from tricarboxylic acids, H3PO4, and acrylic acid homopolymers, acrylic acid-itaconic acid copolymers, and acrylic acid-fumaric acid copolymers. The compns. for the very hard materials consist of 100 wt. parts of a powder mixt. consisting primarily of Ca4(PO4)2O particles coated with a biol. harmless material that has affinity to living organisms, and 5-80 wt. parts aq. acid soln. contg. primarily citric acid and H3PO4. .