4128-73-8

Usage

Chemical Properties

WHITE CRYSTALLINE SOLID

Reactivity Profile

Isocyanates and thioisocyanates are incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions in these materials. Some isocyanates react with water to form amines and liberate carbon dioxide. Polyurethanes are formed by the condensation reaction of diisocyanates with, for example, ethyl glycol.

Upstream product

• 75-44-5 phosgene 
• 101-80-4 4,4'-oxydiphenylene diamine 

Downstream Products

• 19044-26-9 4,4'-Bis--diphenylether 
• 226385-71-3 4,4'-Oxybis(1-hydroxy-1-methyl-3-phenylurea) 
• 226385-79-1 4,4'-Oxybis(1-hydroxy-1-(1-ethylpropyl)-3-phenylurea) 
• 81779-02-4 4,4'-(bis-1,2,4-triazolidine-3,5-dione-4-yl)-diphenyl ether 
• 1198619-85-0 3,3'-(4,4'-oxybis(4,1-phenylene))bis(1-(3,4-dichlorophenyl)-4-imino-5-thioxoimidazolidin-2-one) 
• 1328894-76-3 3,3'-(oxybis(4,1-phenylene))bis(1-(4-fluorophenyl)-4-imino-5-thioxoimidazolidin-2-one) 
• 1005769-91-4 (((CH₃)2CHO)3VNC₆H₄)2O 
• 124887-72-5 4,4'-Bis(1-carboxymethyl-3-hydantoinyl)diphenyl oxide dihydrate 
• 124887-71-4 4,4'-bis-(1-carboxymethyl-3-hydantoyl)diphenyl oxide hydrate 

Relevant academic research and scientific papers

Hydrolytically degradable polyester/silicon co-crosslinked matrices

Polyester/silicon co-crosslinked polymer substrates at least partially degradable by hydrolysis, well adopted as matrices for the controlled release of a wide variety of active agents therefrom, are prepared by controlledly co-crosslinking (a) at least one diorganopolysiloxane having at least two hydroxyl groups per molecule and (b) an oligomeric polylactic and/or polyglycolic polyester α,ω-diol, with an effective co-crosslinking amount of (c) an organic polyisocyanate.

Ethylenic silicon compounds and thermoplastic elastomers obtained therefrom

The invention provides organosilicon compounds of the formula: STR1 in which: N IS 1, 2 OR 3; Each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms; Each R1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms; R2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms; X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R2 via a said hetero-atom; G is an organic radical of valency (m+ l) possess from 1 to 30 carbon atoms; m is 1, 2 or 3; And each Y, which may be identical or different, is a functional group selected from: --NO2, STR2 --COOM (where M represents a sodium, potassium or lithium atom); --COOR4 ; STR3 --COCl; --OH; --OR4 ; STR4 --SH; --SR4 ; STR5 --CONH2 ; --CSNH2 ; --CN; --CH2 --NH2 ; --CHO; STR6 --NCO; STR7 wherein R3 represents a hydrogen atom or a straight or branched alkyl radical possessing up to 6 carbon atoms and R4 represents an alkyl radical possessing up to 4 carbon atoms, with the proviso that two Y groups can together constitute an imide group STR8 wherein R5 represents a hydrogen atom or a straight or branched alkyl radical possessing up to 4 carbon atoms. These are useful intermediates in the preparation of disilanes and silicon polymers, in particular of polyethylenic silicon compounds which can be polymerized with an α, ω-dihydrogenopolysiloxane to give thermoplastic elastomers.