Symmetrical bis(unsymmetrical tertiary-alkyl and tertiary- aralkyl azo)
申请人:Pennwalt Corporation
公开号:US03937761A1
公开(公告)日:1976-02-10
Novel symmetrical bis(unsymmetrical t-alkyl and t-aralykl azo) compounds of the general formula I: R -- N = N -- R.sub.12 -- N = N -- R' (I) wherein R = R' = (R").sub.3 C--, e.g., 1,2-ethylene bis(4-t-butylazo-4-cyanovalerate); and the use of I for sequential generation of free radicals, e.g. styrene monomer and 1,2-ethylene bis(4-t-butylazo-4-cyanovalerate) are reacted to obtain polystyrene containing attached azo groups which in turn is reacted with methyl methacrylate monomer to obtain a block copolymer of polystyrene and poly(methyl methacrylate).
对称的新型双(非对称的t-烷基和t-芳基偶氮基)化合物的一般式I为:R - N = N - R.sub.12 - N = N - R' (I),其中R = R' = (R").sub.3 C--,例如1,2-乙烯基双(4-t-叔丁基偶氮基-4-氰基戊酸酯);以及使用化合物I进行自由基的顺序生成,例如苯乙烯单体和1,2-乙烯基双(4-t-叔丁基偶氮基-4-氰基戊酸酯)反应以获得含有偶氮基的聚苯乙烯,然后再与甲基丙烯酸甲酯单体反应以获得聚苯乙烯和聚甲基丙烯酸甲酯的嵌段共聚物。
Symmetrical bis(unsymmetrical tertiary-alkyl and tertiary-aralkyl azo)
申请人:Pennwalt Corporation
公开号:US03957750A1
公开(公告)日:1976-05-18
Novel symmetrical bis(unsymmetrical t-alkyl and t-aralkyl azo) compounds of the general formula I: r -- n = n -- r.sub.12 -- n = n -- r' (i) where R = R' = (R").sub.3 C--, e.g., 1,2-ethylene bis(4-t-butylazo-4-cyanovalerate); and the use of I for sequential generation of free radicals, e.g. styrene monomer and 1,2-ethylene bis(4-t-butylazo-4-cyanovalerate) are reacted to obtain polystyrene containing attached azo groups which in turn is reacted with methyl methacrylate monomer to obtain a block copolymer of polystyrene and poly(methyl methacrylate).
化合物I的通式为:r -- n = n -- r.sub.12 -- n = n -- r' (i),其中R = R' = (R").sub.3 C--,例如1,2-乙烯基双(4-t-丁基偶氮基-4-氰基酸酯)。该化合物可用于顺序自由基产生,例如,苯乙烯单体和1,2-乙烯基双(4-t-丁基偶氮基-4-氰基酸酯)反应,得到含有偶氮基的聚苯乙烯,然后再与甲基丙烯酸甲酯单体反应,得到聚苯乙烯和聚甲基丙烯酸甲酯的嵌段共聚物。
Tertiary aliphatic alpha-(sulfo)-azo compounds
申请人:Pennwalt Corporation
公开号:US03962210A1
公开(公告)日:1976-06-08
Novel t-aliphatic .alpha.-(sulfo) azo compounds: ##EQU1## and the use of compounds I as polymerization initiators for vinyl monomers and as curing agents for resins. For example, 2-t-butylazo-2-thiophenoxy-4-methylpentane, prepared by reacting a solution of thiophenol and sodium hydroxide in methanol with 2-t-butylazo-2-chloro-4-methylpentane at 10.degree. - 15.degree.C., is used to cure an unsaturated polyester-styrene resin at 115.degree.C. and to polymerize styrene at 115.degree.C.
Process for polymerizing unsaturated monomers and unsaturated polyester
申请人:Pennwalt Corporation
公开号:US04048423A1
公开(公告)日:1977-09-13
Unsymmetrical azo compounds (R").sub.3 C--N.dbd.N--R' where (R").sub.3 C-- is tert.-aliphatic and R' is --C(R.sub.1)(R.sub.2)(Z) or ##STR1## e.g., 1-t-butylazo-1-chlorocyclohexane, their use as vinyl polymerization initiators and polyester resin curing agents, and methods for preparing same from t-aliphatic hydrazones and t-aliphatic .alpha.-halo-substituted azoalkanes. RELATED APPLICATIONS
.alpha.-ISOCYANATO AND .alpha.-ISOTHIOCYANATO AZOS AND THEIR DERIVATIVES
申请人:Pennwalt Corporation
公开号:US04028344A1
公开(公告)日:1977-06-07
Azoalkanes of the formula ##STR1## WHERE Z is isocyanate or isothiocyanate or derivatives thereof, such as 1-t-butylazo-1-isothiocyanatocyclohexane, which are useful as foaming agents for polyester resins and as free radical initiators for vinyl monomers.