[EN] PROCESS FOR THE PRODUCTION OF DIACYL PEROXIDES<br/>[FR] PROCÉDÉ DE PRODUCTION DE PEROXYDES DE DIACYLE
申请人:NOURYON CHEMICALS INT BV
公开号:WO2020249691A1
公开(公告)日:2020-12-17
Process for the production of a diacyl peroxide involving the reaction of an anhydride with an aldehyde and oxygen, removal of the formed carboxylic acid, production of an anhydride from said carboxylic acid, and recycling of the anhydride within the process.
A process for preparing polymer-encapsulated dispersed non-monomer solids, such as, polymer-encapsulated pigments. Water, a pigment, a nonionic protective colloid or stabilizing agent, and a portion of a nonionic monomer having at least one monovalent unsaturated organo moiety are admixed. The pigment has a minimum of surface charge. A nonionic polymerization initiator is added to the admixture and the admixture is heated to begin the polymerization of the nonionic monomer. A nonionic catalyst and the remainder of the nonionic monomer are added to the admixture. The polymerization is allowed to proceed to finality or the desired degree. A polymer-encapsulated pigment dispersion is obtained.
Hydroxy-t-alkyl peroxyesters having the general structure
where R, R1, R2, R, and R4 can be alkyl moieties and having 10 hour half-life temperatures below about 75°C (for example, 3-hydroxy-1,1-dimethylbutyl peroxy-neodecanoate) are described. These peroxyesters are used as initiators for vinyl monomer polymerization and as catalysts for curing unsaturated polyester resins in order to improve the efficiency of the systems.
Novel hydroxy peroxides of the Structure A
[wherein R-, -R11- and -X- are as defined in the Summary of the Invention Section],
having 10 hour half-life temperatures of 85-100 °C, the processes for their preparation, and the use of these novel compositions in curing of unsaturated polyester resins and in initiating polymerization of ethylenically unsaturated monomers.
A process for making a composite article having improved mechanical properties such as fatigue life, which process comprises contacting at least one continuous filament with a mixture comprising a resin and a strain relieving polymer.