Maleic acid Mercaptans

Cassaday (1950), Shostakovski et al. (1951) and Melnikov et al. (1952) investigated extensively the addition reactions of dialkyl phosphorodithioic acids to unsaturated dicarbonic acid esters, and found that the dialkyl phosphorodithioic acids are added at the double bond in the same way as are mercaptans. This reaction was used by Cassaday (1950) who prepared 0,0-dimethyl-S-(l,2-dicarbethoxy)-ethyl phosphorodithioate by the addition reaction of dimethyl phosphorodithioic acid and maleic acid diethyl ester. This compound, known by the name malathion (89), became one of the most important phosphorus ester insecticides because of its low toxicity to warm-blooded animals. 

Maleic Acid 110-16-7 Methyl Eugenol 93-15-2 n-Dodecyl Mercaptan 112-55-0... 

Interchain copolymer formation Copolymers of reactive polystyrene and polymers with amide, mercaptan, epoxy, hydroxy, anhydride or carboxylic acid groups, copolymer of polypropylene grafted with maleic anhydride and nylon-6, copolymer of polyolefines and polystyrene, copolymer of EVA grafted with methacrylates and grafted polystyrene... 

Ethylene/maleic anhydride copolymer. See Ethylene/MA copolymer Ethylene mercaptan. See Ethylene dimercaptan Ethylene mercaptoacetate. See Glycol dimercaptoacetate Ethylene/methacrylic acid copolymer CAS 25053-53-6... 

Other polymers that do not lend themselves to treatment with maleic anhydride can be epoxidised with glycidyl methacrylate to enable them to react with NH2, carboxyl, hydroxyl, mihydride or mercaptan groups. Further reagents used with PP include carboxylic acids, silanes and PMMA. Functionalisation does not necessarily proceed very far - the number of functioual groups introduced to each PP molecule may be low - and it may change the behaviour of the polymer in some ways. 

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