Vulkacit CRV

Ethylenethiourea reacts to form monosulftde cross-links (117). A number of alternative curatives have been proposed to avoid use of ethylene thiourea. These iaclude polyhydric phenols (118), hydroxyphenyl and mercapto substituted tria2oles (119), thiolactams (120), thia2o1idinethiones as Vulkacit CRV (121), and alkanethioamides (122). Among these, Vulkacit CRV is the most widely used. An accelerator is ordinarily used ia combination with a retarder to control premature cross-linking. Tetramethylthiuram disulfide [137-26-8] is ordinarily used for this purpose when the accelerator is either ethylenethiourea [96-45-7] or a thia2o1idinethione. 

Trade Name Synonyms Akrochem Accelerator CRA [Akrochem http //www.akrochem.com]] Vulkacit CRV/LG f[Bayer/Fiber, Addits., Rubber http //www.bayerus.com]... 

Akrochem Accelerator CRA 3-Methyl-thiazolidinethione-2 Vulkacit CRV/LG 1910-42-5 Paraquat dichloride 1912-24-9 Atrazine 1912-26-1 Trietazine 1912-84-1 Stannous oleate 1918-00-9 Dicamba 1918-02-1 Picloram 1918-16-7 Propachlor 1921-70-6 Pristane Robuoy 1929-30-2... 

Nontoxic alternative to ETU (N-methyl thiazolidine thione-2)Vulkacit CRV. 

Wide ranges of organic accelerators, which are capable of nucleophilic substitution at the allylic chloride atoms, have been used in polychloroprene curing. Polyhydric phenols (103,104), hydroxyphenyl mercapto-snbstituted triazoles (105), thiolactams (106), thiazolidine and thiones, Vulkacite (Bayer Chemical Co.). CRV (107,108), alkyl thioamides, formaldehyde amine reaction products, amines, guanidines, dithiocarbamates, thiurams, and snlfenamides have all been used as accelerators. 

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