摘要:
The invention relates to a compound of the formula (I) wherein n' is 1,2,3 or 4 and X is S or S-S- where each A is where Y is H, CI or Br, and preferably when used as a flame retardant at least one Y is CI or Br or where n 2 is 0, 1 and n 3 is 0, 1 R', R 2 and R 3 are H, or straight or branched alkyl of 1 to 8 carbons, or where Y is the same as defined above. The new compounds are suitable for use in polymers as synergists for antioxidants or as antioxidants per se. The invention furthermore concerns articles of manufacture made of polymers which comprise compounds of formula (I).
摘要:
Metallmercaptide der Formel worin Me ein Metall-, Oxometall-, Alkoxymetall- oder Organometall-Kation aus der 1.―5. Gruppe des Periodensystems ist, m 0, 1 oder 2, n eine Zahl von 1 bis 4, R l H, Alkyl, Acyloxymethyl oder Alkoxymethyl, R 2 einen sterisch gehinderten Phenolrest und R 3 einen einwertigen organischen Rest darstellen, sind Stabilisatoren für organische Materialien, die gegen Hitze und Sauerstoff empfindlich sind. Insbesondere können sie als Stabilisatoren für chlorhaltige Thermoplasten, für Elastomere und für Schmiermittel verwendet werden. Bevorzugte Kationen sind Organozinn-Kationen.
摘要:
A process for producing a graft copolymer characterized by melt-blending 100 parts by weight of a resin mixture comprising 90 to 10% by weight of a polyphenylene oxide having a structurel unit of (wherein R 1 , R 2 , R 3 and R 4 each represents hydrogen, a halogen atom, a hydrocarbon or substituted hydrocarbon radical) and 10 to 90% by weight of a styrene polymer and/ or a copolymer of a styrene and other monomers in the presence of 0.01 to 5 parts by weight of a sulfurcontaining grafting agent selected from the group consisting of sulfur, sulfur halogenides, sulfides, thiols and thiophenols.
摘要:
A phenolic esteramide, useful in protecting organic materials such as synthetic and natural rubbers, petroleum products, and plastics from oxidative degradation, has the formula R' COOANHM wherein A is C 2 to C 12 alkylene, C 4 to C 8 cycloalkylene or -CH 2 -C(CH 2 ) p , wherein p is an integer from 3 to 6, or A is C 2 to C 5 alkylene substituted with one or two -CH 2 OCO(CH 2 ) m R 3 groups, wherein R 3 is 3-W-5-Y-4-hydroxyphenyl, wherein W and Y may be the same or different and are C, to C 12 alkyl and m is 0, 1 or 2; R 1 is -(CH 2 ) m R 3 . wherein m and R 3 are as defined above, and M is either hydrogen or-COR 2 , wherein R 2 is C 1 to C 20 alkyl, C 6 to C 10 aryl or phenyl substituted with halogen, C 1 to C 12 alkyl, C 1 to C 12 alkoxy, nitro or hydroxy or R 2 is -BCONHAOCOR 1 wherein A and R 1 are as defined above and B is a single bond, C 1 to C 10 alkylene, phenylene, C 4 to C 12 oxydialkylene or C. to C 12 thiodialkylene, or R 2 is the same as R 1 which is defined above. Methods of preparing the esteramide, compositions containing them and methods of using them are also described.
摘要:
Chlorhaltige Thermoplasten, insbesondere PVC, können durch synergistische Gemische aus a) einem Merkaptan der Formel R(CH 2 SH) 2 , worin n 2 bis 4 ist und R einen n-wertigen aromatischen Rest bedeutet, und b) einem Epoxidgruppen enthaltenden Weichmacher gegen thermische Schädigung stabilisiert werden.
摘要:
Thiol masterbatch composition are provided for preparing an ultraviolet-curable composition, the thiol masterbatch composition comprising at least 70 % by weight of thiol compounds and at least one stabilizer. Kits for providing an ultraviolet-curable composition include a first part containing therein a thiol masterbatch composition, and a second part separate from the first part and containing therein a (meth)acrylate composition. Methods of preparing an ultraviolet-curable composition include combining a thiol masterbatch composition and a (meth)acrylate composition.