4 results about "Radical initiator" patented technology

Provided is a shaped article for clean rooms comprising a resin composition prepared by melt-kneading 100 parts by weight of a cyclic olefin polymer (A) having a glass transition temperature of from 60 to 200° C., from 1 to 150 parts by weight of a flexible copolymer (B) prepared by polymerizing at least two monomers selected from a group consisting of olefins, dienes and aromatic vinyl-hydrocarbons, and having a glass transition temperature of 0° C. or lower, from 0.001 to 1 part by weight of a radical initiator (C), and from 0 to 1 part by weight of a polyfunctional compound (D) having at least two radical-polymerizable functional groups in the molecule. The shaped article for clean rooms has good chemical resistance, heat resistance and dimensional accuracy, it is inhibited from releasing a volatile component around it, and it has good abrasion resistance and is inhibited from producing particles.

The invention discloses a preparation method of PMI (Polymethacrylimide) foam plastic. The preparation method comprises the following steps: S1, blending and mixing an oil-soluble free radical initiator, a monomer, a foaming agent and an additive to obtain a spare sizing agent; S2, polymerizing the mixture in a constant-temperature water bath to obtain a foamable copolymer material; S3, smashing the foamable copolymer material to obtain foamable copolymer particles; S4, directly pouring the foamable copolymer particles into a forming mold according to a proportion for foaming, and filling molds of any shapes with the foamable copolymer particles according to different density demands for foaming to obtain PMI foam products of corresponding mold shapes. By adopting the preparation method, the conventional process is improved, the production demands of special-shaped products can be met, special-shaped molds can be directly used for foaming according to the profiles of the special-shapedproducts, the utilization rates of raw materials are improved, and meanwhile the production efficiency can be improved greatly.

The present invention relates to a radical-curable adhesive composition including a (A) radical-polymerizable compound that includes at least one hydrophilic functional group in the molecule in greater than 30 parts by weight and less than or equal to 93 parts by weight; a (B) multifunctional (meth)acryl-based compound in 5 to 40 parts by weight; a (C) phosphate compound that includes one or two (meth)acrylic groups in the molecule in 1 to 40 parts by weight; and a (D) radical initiator in 0.5 to 20 parts by weight, with respect to 100 parts by weight of the radical-curable adhesive composition, and a polarizing plate and an optical member including the radical-curable adhesive composition.

The invention provides a preparation method of aryl borate, which mainly comprises the following steps: in the presence of a water-soluble free radical initiator, reacting by using water as a solventand aryl sulfonyl chloride and bis(pinacolato)borate as raw materials, extracting the reaction product by using an organic solvent after the reaction is completed, collecting the extract an organic phase, and carrying out reduced pressure distillation to obtain the product aryl borate. By using the water-soluble free radical initiator, water can be used as a reaction solvent; compared with the prior art that acetonitrile, halogenated alkane, ethyl acetate and other organic solvents are used, water is used as a solvent, environmental pollution is reduced, toxicity is reduced, and raw material sources are more economical; in addition, the method has the advantages of mild reaction, simple post-treatment, high yield, high purity and the like, and is very suitable for industrial production.