摘要:
The present invention relates to a new class of peroxides and to a process for the preparation of these peroxides having general formula (I), wherein n=1 or 2, R1, R2, R4, R5 and R6 are independently selected from the group comprising hydrogen, C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C7-C20 aralkyl, and C7-C20 alkaryl, or R1 and R2 form a C3-C12 cycloalkyl group, which groups may include linear or branched alkyl moieties; and each of R1, R2, R4, R5 and R6 may optionally be substituted with one or more groups selected from hydroxy, alkoxy, linear or branched alkyl, aryloxy, halogen, ester, carboxy, nitrile, and amido, and R1 and R2 may form a ring, and R3 is independently selected from the group comprising C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C7-C20 aralkyl, and C7-C20 alkaryl, which groups may include linear or branched alkyl moieties; and R3 may optionally be substituted with one or more groups selected from hydroxy, alkoxy, linear or branched alkyl, aryloxy, halogen, ester, carboxy, nitrile, and amido, and any pair of the optionally substituted R3, R4, R5, and R6 may form a ring, comprising the reaction of the corresponding ketone peroxide with general formula (II), wherein n, R1, and R2 have the identified meaning, with an alkyl vinyl ether with general formula (IIIa) or with an acetal with general formula (IIIb), wherein R3, R4, R5, and R6 have the identified meaning, in the presence of a catalyst, to the use of these peroxides as polymerization initiator, curing for unsaturated polyester, and/or modifying agent, and to formulations comprising these peroxides and a carrier or diluent.
摘要:
The description relates to a process for producing methyl ethyl ketone peroxide by the reaction of methyl ethyl ketone and hydrogen peroxide in the presence of an acid catalyst in a phlegmatizer agent in which a 50 to 70 % hydrogen peroxide is used, the aqueous phase is separated from the two-phase mixture obtained after the reaction without the addition of salt and as much of a water-miscible phlegmatizer agent is added to the organic phase as is needed to produce a clear methyl ethyl ketone peroxide solution.
摘要:
Powder blends are described comprising blends of particulate water soluble high molecular weight polymer flocculants. The polymer flocculants can include polyethylene oxide, polyDadmac, Dadmac-acrylamide copolymers, copolymers thereof and combinations thereof. The powder blends allows the use of fine powders while reducing potential air quality and safety issues. The powder blends can be used for waste water purification, fiber dewatering, and the like. The powder blends can be diluted by a water dilution flow prior to entering a waste water stream.
摘要:
Methyl propyl ketone peroxide formulations are claimed that can be safely handled at ambient temperature, are storage stable, and give fast curing rates of unsaturated polyester resins particularly when accelerated with a complex of two different metals. The claimed products are particularly suited for thin articles two different metals. The claimed products are particularly suited for thin articles and coating such as suited for used in gel coat systems. The pure ketone peroxides consist of more than 60 % by weight of type-4 methyl propyl ketone peroxide and used as formulations containing sufficient amount of a non-aqueous phlegmatizer.
摘要:
The present invention relates to a novel antioxidant-peroxide compound of Structure A, in which the definitions of X, Y, R, An, x, and y are given in the Summary of the Invention section, for example, t-butyl peroxy-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, processes for producing polymeric compositions of enhanced oxidative stability via initiation of polymerization of ethylenically unsaturated monomers, curing of elastomers and unsaturated polyester resins, modification of polypropylene and other polymers and copolymers, and crosslinking of olefin polymers and copolymers, and the resulting polymers having enhanced oxidative stability.
摘要:
A method includes transporting water containing chlorine dioxide, chlorine, chloramines, or hypochlorites through a pipe. The method includes forming a polyethylene resin using a catalyst, mixing the polyethylene resin with an antioxidant, wherein the antioxidant is a thioester, a hindered amine light stabilizer or 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene to form a resin/antioxidant mixture, extruding pipe from the resin/antioxidant mixture, and flowing water containing chlorine dioxide, chlorine, chloramines, or hypochlorites through the pipe. An extruded article is adapted for use in containment and/or transport of water that contains chlorine dioxide, chlorine, chloramines, or hypochlorites. The extruded article includes a polyethylene resin and an antioxidant. The antioxidant is a thioester, a hindered amine light stabilizer or 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene.
摘要:
A resin comprising: polyethylene having an a parameter of between 0.20 and 0.40 and an MWD of between 1 to 6. The present disclosure is also related to methods of making improved polyethylene films and coatings comprising: a polyethylene resin having an a parameter of between 0.28 to 0.36 and an MWD of between 2 and 3.5.