Trimethyl thiourea

Trimethyl thiourea 3978 3033-77-0 Clycidyl trimethyl ammonium chloride 1855... 

Trimethyl thiourea (2phr) with epoxy resin (1 phr) gives safer processing, faster cure rate, improved compression set, poorer tear resistance, lower elongation than ETU and is used when the best compression set is required.The accelerator cost is higher than ETU. 

Compression set resistance can be improved considerably in all types of polychloroprene by effecting a very tight cure. Thus, long cure times, high curing temperatures and high accelerator concentrations are beneficial. While acceleration with ethylene thiourea (1 phr) or diethyl thiourea (1 phr) for fast continuous vulcanisation will meet most requirements, for the most demanding specifications it may be necessary to use trimethyl thiourea (2 phr) and epoxy resin (1 phr) or tributyl thiourea (3-4 phr). 

Fusion of aminoamides with urea or thiourea leads to pyrazolopyrimidinediones or the corresponding one-thiones (Scheme 52) <56JA2418). This method was employed <65JOC199) to establish the structure of the trimethylated compound (26 Scheme 53) (Section 4.05.3.1). 

Branched Alkanes. 2,6,10,14-Tetramethyl-hexadecane (phytane) and 2,6,10,14-tetramethyl-pentadecane (pristane) were found in considerable amounts (3). The dominance of phytane over pristane was observed. Other aliphatic isoprenoid alkanes C15 (2,6,10-trimethyl-dodecane, farnesane), C-, (2,6,10-trimethyl-tridecane), and C-g (2,6,10-trimethyl-pentaaecane) were also identified (4). In tne thiourea adduct of the branched-cyclic fraction, a homologous... 

Thiourea also forms inclusion-compounds. The presence of a sulphur atom instead of an oxygen atom in thiourea accounts for an increase in the size of the thriourea molecule and of the crystalline structure as a whole so that the central channel has a diameter of about 6.5A, Branched-chain hydrocarbons become trapped in the channel to form complexes. Thus 2, 2, 4-trimethyl pentane fits into the channel and yields thiourea inclusion-compound. Normal hydrocarbons do not fill the available space to an extent sufficient for stability and do not form complexes. 

AI3-62303 CCRIS 611 EINECS 219-644-0 HSDB 4095 NCI-C02186 NSC 153385 Thiate E Thiourea, trimethyl- ... 

Synonyms 1,1,3-Trimethyl-2-thiourea N,N,N -Trimethylthiourea Urea, 1,1,3-trimethyl-2-thio... 

Isopropanolamine 2-Mercaptoethanol 1-Methyl-3-phenyl-5-[3-(trifluoromethyl) phenyi]-4(1 H)-pyridinone a-Naphthylamine Nitrosophenylhydroxylamine ammonium salt Phenyl benzoate m-Phenylenedimaleimide N-Phenylmaleimide Phenyl mercuric bromide Potassium carbonate Potassium N-hydroxymethyl-N-methyldithiocarbamate Pyridine Silica, fused Tetrachlorophthalic acid Thiourea p-Toluic acid , N-Tridecyl-2,6-dimethylmorpholine Trimethyl phosphate agric. chemicals, maleic hydrazide Hydrazine agric. sprays Zinc sulfate monohydrate agric., biodegradable Poly (hydroxybutyrate-hydroxyvalerate) agriculture... 

Many compounds have been reported in the literature to be chemical antiozonants, and nearly all contain nitrogen. Compound classes include derivatives of 2,2,4-trimethyl-l, 2-dihydroquinoline, N-substituted ureas or thioureas, substituted pyrroles, and nickel or zinc dithiocarbamate salts. The most effective antiozonants, however, are derivatives of p-phenylenediamine (p-PDA). The commercial materials are grouped into three classes N,N -dialkyl-p-PDAs, Nalkyl-N -ary 1-p-PDAs, and NX-diary 1-p-PI) As. The NX-dialkyl-p-PDAs (where the alkyl group may be 1-methylheptyl, l-ethyl-3-methylpentyl, 1,4-dimethylpentyl, or cyclohexyl) are the most effective in terms of their reactivity to ozone. These derivatives increase the critical stress required for the initiation of crack growth, and they also reduce the rate of crack growth significantly. The sec-alkyl group is most active, for reasons that are not yet completely clear. The drawbacks of these derivatives are ... 

Dry HCl bubbled during 1 hr. through a soln. of equimolar amounts of mesityl oxide and thiourea in methanol 2-amino-4,6,6-trimethyl-l,3-thiazine hydrochloride. Y 75%. S. M. Deshpande and A. K. Mukerjee, Current Sci. 41, 139 (1972. ... 

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