Mechanistic studies on six-membered chelate complexes. Aquation of some dichlorobis(substituted biguanide)rhodium(III) nitrates
作者:Biswanath Chakravarty、Pradip Kumar Das、Asim Kumar Sil
DOI:10.1016/s0020-1693(00)89028-3
日期:1978.1
Abstract Studies on the aquation of dichlorobis(substituted biguanide)rhodium(III) complexes were carried out in aqueous and aqueous methanol media by conductometric method. The release of chlorides in all the complexes takes place in a steppe manner and rates of each step were determined by a graphical method. Rates of aquation decrease with any substituent and remain nearly equal for all the substituents
An object of the present invention is to provide a curable composition which is excellent in curability and storage stability without an organotin curing catalyst which is known to be toxic. In order to achieve this object, the present inventors have studied to find that a curable composition comprising: (A) an organic polymer having a silicon-containing group cross-linkable by siloxane bond formation (reactive silyl group); (B) a guanidine compound; and (C) a methyl ester group-containing compound is effective. In addition, the present inventors have found that a cured product of this curable composition has good physical properties. Thereby, the present inventors have completed the present invention.
CURABLE COMPOSITION, AND CURED SYNTHETIC RESIN USING SAME
申请人:Mie University
公开号:EP2837660A1
公开(公告)日:2015-02-18
[Problem] To provide a curable composition having high stability and excellent curing properties.
[Solution] The present invention relates to a curable composition, and a cured synthetic resin using same, that functions as a curing catalyst for a synthetic resin. The curable composition contains (A) a titanium alkoxide, (B) a bidentate organic chelating agent that stabilizes the titanium alkoxide and (C) a guanidine compound. The molar ratio of the titanium alkoxide (A), the bidentate organic chelating agent (B), and the guanidine compound (C) is 1:0.5-3:0.5-2.
Artificial stone having excellent mechanical and weatherability properties is prepared from a highly filled crosslinkable organosilicon composition where the filler comprises at least 20 weight percent of coarse fillers, the organosilicon component contains silicon-bonded alkoxy and or hydroxyl groups, with a catalyst containing a metal compound and an amidine or guanidine.