Abstract:
The invention relates to peroxide compositions comprising a reactive diluent for the peroxide, wherein the diluent is either a component containing one or more vinyl ether group(s) and having a monomeric structure according to formula 1, (A—CH═CH—O)n—R, or is a suitable resinous compound comprising, in a covalently built-in manner, a component containing one or more vinyl ether group(s). In the formula A represents hydrogen or an alkyl group with 1–3 C atoms, and individual A groups may be different R either represents an aliphatic group, optionally branched, with 1–20 C atoms, etc. or represents a polyethylene or polypropylene glycol with 2 to 120 glycol units, etc. and n is 1, 2, 3 or 4. The resinous compounds comprising, in a covalently built-in manner, a component containing one or more vinyl ether group(s)are obtained by reaction of: a) a first compound (the HVE-compound) containing at least one hydroxyl group and at least one vinyl ether group, and b) a second compound (the D/HIC-compound), being an isocyanate, reacting with formation of one or more urethane group(s), and c) a third compound (the G/P/HP-compound) chosen from the groups of (1) C2-6 glycols, (2) C5-20 polyols having 2–5 hydroxyl groups and (3) hydroxyl terminated polyester compounds, not being alkyd resins, having 1–5 free hydroxyl groups and from 2–50 monomeric ester units (the G/P/HP-compound), or mixtures thereof. The invention also relates to the preparation of such compositions and to the use of such reactive diluents for peroxides in radically curing of unsaturated polyester resins for structural applications.
Abstract:
The invention relates to a method to safely produce, handle and transport packaged organic peroxide formulations comprising a reactive phlegmatiser and to the use of such packaged material in polymerisation and polymer modification processes, particularly the high-pressure (co)polymerisation process of ethylene and/or the suspension (co)polymerisation process of styrene.
Abstract:
The present invention relates to a new class of peroxides and to a process for the preparation of these peroxides having the 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.
Abstract:
Novel unsaturated peroxide compositions of Structure A,R--Q--X--R.sub.1 A[Where the R--Q-- grouping contains a polymerizable carbon-carbon double bond, --X-- is a direct bond or a connecting diradical and --R.sub.1 is a peroxide containing radical all as defined in the Summary of the Invention Section.], polymeric-peroxide compositions derived from them and their uses are disclosed.
Abstract:
The present application discloses a process for the production of agglomerates of peroxides that are solid at room temperature and which decompose rapidly when heated to their melting point. The process comprises agitating an aqueous suspension comprising a solid first peroxide which rapidly decomposes when heated to its melting point and a solid second peroxide which does not rapidly decompose when heated to its melting point and has a melting point which is substantially lower than the temperature at which said first peroxide rapidly decomposes, at a temperature sufficient to at least partially melt said second peroxide and below the decomposition temperature of said first peroxide to produce agglomerates comprised of said first and second peroxides; cooling with continued agitation the aqueous suspension having agglomerates to a temperature at which said second peroxide turns solid; and isolating the agglomerates. Also disclosed is a process such as that described above wherein a solvent immiscible with water is employed to aid the agglomeration process. The agglomerated peroxides are particularly useful in the polymerization of vinyl chloride monomers and the curing of unsaturated polyester resins.
Abstract:
Gem-diperoxyesters of the formula: ##STR1## where R is selected from methyl and ethyl; R.sub.1 is ethyl when R is ethyl; R.sub.1 is hydroxyalkyl of 1 to 7 carbon atoms when R is methyl; and each R.sub.2 is ##STR2## where each of R.sub.3, R.sub.4, and R.sub.5 is selected from hydrogen and alkyl, provided not more than one of R.sub.3, R.sub.4, and R.sub.5 is hydrogen, R.sub.3, R.sub.4, and R.sub.5 collectively containing from 2 to 12 carbon atoms.The compounds are particularly efficient at varying temperatures from ambient to 60.degree. C. for the initiation of the polymerization of vinyl chloride. They also have high efficiency in the curing of polyester resins and in the polymerization of other monomers and comonomers having ethylenic unsaturation.
Abstract:
Polymers of the formula [(A.sub.n.sbsb.1 -R-D.sub.n.sbsb.2).sub.v P.sub.n.sbsb.3 ].sub.w Z.sub.n.sbsb.4 where A is a peroxy-containing group; R is a 2-4 valent aliphatic, cycloaliphatic or aromatic radical; P is a polyvalent polymeric residue; D is a carbonyl-containing connecting group; and Z is a terminal group, such polymers being useful with vinyl monomers in the formation of block and graft polymers.
Abstract:
Tetraperoxides of the formula ##EQU1## where X is a bivalent radical such as alkylene; R.sub.1 is hydrogen or an organic radical; R.sub.2 is alkylene alkoxy carbonyl; and R.sub.3 is an organic radical. Method of preparing tetraperoxides by addition reaction between a bis-hydroperoxide and a carbonyl compound to form a dihydroxy diperoxide, followed by condensation of the dihydroxy diperoxide with a tertiary monohydroxide. The tetraperoxides are useful for vulcanizing saturated elastomers, crosslinking plastomers, and initiating radical polymerization.
where X is a bivalent radical such as alkylene; R1 is hydrogen or an organic radical; R2 is alkylene alkoxy carbonyl; and R3 is an organic radical. Method of preparing tetraperoxides by addition reaction between a bis-hydroperoxide and a carbonyl compound to form a dihydroxy diperoxide, followed by condensation of the dihydroxy diperoxide with a tertiary monohydroxide. The tetraperoxides are useful for vulcanizing saturated elastomers, crosslinking plastomers, and initiating radical polymerization.
Abstract:
A vulcanizable composition contains an olefin copolymer or terpolymer, a reinforcing filler and an alkylidene peroxide of the formulae wherein R and R1 are each H, alkyl, aryl or aralkyl groups, R11 and R111 are each tertiary alkyl or tertiary aralkyl groups, R1111 is a hydrogen atom or an alkyl radical, R5 is an alkylene, arylene or aralkylene radical and R6 is the same as R11 or R111, R11 and R111 are different and n is 0 or 1. The peroxide should be present in an amount from 0.1 to 10 parts by weight, per 100 parts of copolymer or terpolymer. Also, vulcanized articles obtained from the said compositions by heating the composition to a temperature higher than the decomposition temperature of the alkylidene peroxide. Examples are given in which ethylene-propylene copolymers are vulcanized.ALSO:Alkylidene peroxides of the general formulae wherein R and R1 are each H, alkyl, aryl or aralkyl groups, R11 and R111 are each tertiary alkyl or tertiary aralkyl groups, R1111 is a hydrogen atom or an alkyl radical, R5 is an alkylene, arylene or aralkylene radical and R6 is the same as R11 or R111, R11 and R111 are different and n is 0 or 1 are prepared in the case of the first three types by transperoxidation of an alkylidene peroxide of the formulae with a hydroperoxide of the formula R111OOH which is less volatile than the hydroperoxide R11OOH from which the radical -OOR11 is derived, in the absence of catalysts generally at from 35 DEG to 110 DEG C. by continuously removing by distillation the hydroperoxide R11OOH released generally until 1 mol. of hydroperoxide R11OOH per 1 mol. of starting alkylidene peroxide has been eliminated or until the R11OOH hydroperoxide has been completely eliminated; and in the case of the fourth type by transperoxidation generally of 2 mols of an alkylidene peroxide of the formula with 1 mol. of a dihydroperoxide of the formula This invention also comprises the compounds of the formulae per se: Examples are given for the production of the compounds. They are useful as vulcanizing agents.