Nippon Oil Fats Co., Ltd.

Nof Corporation

Nihon Yushi Co., Ltd.

Masaru Matsushima

Takeshi Komai

Masaharu Nakayama

Shuji Suyama

Shigeki Banno

Norihisa Ujikawa

Hiroshi Okada

Tooru Nishikawa

Nobuo Kanazawa

Takeshi Nakajima

A 1-cyclohexyl-1-methylethylperoxy carbonate represented by the formula: ##STR1## (wherein n.sub.1 stands for 1 or 2 and, when n.sub.1 is 1, R.sub.1 stands for an alkyl group of up to 14 carbon atoms, an aralkyl group of up to 14 carbon atoms, an alkoxyalkyl group of up to 14 carbon atoms, a cycloalkyl group of up to 14 carbon atoms, or an aryl group of up to 14 carbon atoms, and when n.sub.1 is 2, R.sub.1 stands for an alkylene group of up to 16 carbon atoms, an aralkylene group of up to 16 carbon atoms, an oxaalkylene group of up to 16 carbon atoms, a cycloalkylene group of up to 16 carbon atoms, or a phenylene group of up to 16 carbon atoms) is a novel compound. It is produced by causing a chloroformate represented by the formula: ##STR2## (wherein n.sub.2 has the same meaning as n.sub.1 in the preceding formula) to react with 1-cyclohexyl-1-methylethylhydroperoxide. It is useful as a polymerization initiator for a vinyl monomer, a curing agent for an unsaturated polyester resin and a cross-linking agent for a polymer.

1-cyclohexyl-1-methylethylperoxy carbonate, method for production

A styrene resin composition which is admixed with a styrene-vinyl acetate block copolymer is improved in the fluidity without degrading the mechanical strength and electric insulation resistance. Said vinyl acetate block polymer can easily be obtained by using a polymeric peroxide having ester bonds in the molecule thereof, notwithstanding that a copolymer of a styrene and a vinyl acetate could not be prepared easily by the prior art.

Styrene resin-block copolymer composition

A composition of matter which is prepared by blended with an unsaturated resin with a block copolymer which is obtained by employing a polymeric peroxide has dispersion stability during long storage found in no conventional one. A hardened moulding product obtained from the aforementioned composition matters is small in its volume shrinkage and exhibit smoothness and gloss to the surface thereof even it is employed after long period storage.

Low shrinking unsaturated polyester resin composition

A copolymer having peroxy bonds in the molecule thereof which is obtained by copolymerizing an diacyl type polymeric peroxide having ester bonds therein with one or more monomers having double bonds therein, may have a broad range of average molecular weight and a lot of peroxy bonds therein, and it may be used as an useful polymerization initiator in producing a block copolymer.

Copolymer having peroxy bonds in the molecule thereof and a process for

When polystyrenes having peroxy bonds therein are charged into a polymerization system of methyl methacrylate series monomers, the said polystyrenes act as an opaquing agent and a polymerization initiator. The obtained opaque or translucent plate is splendid in optical and mechanical properties.

Process for producing a methyl methacrylate series polymer translucent

A non-aqueous liquid dispersion of polymers is obtained by a first step of copolymerizing one or more vinyl-type monomers with one or more polymerized peroxides, capable of further polymerization followed by a second step of copolymerizing the resulting copolymer having peroxy bonds therein with one or more vinyl-type monomers different than the one or ones used in the first copolymerization step, in an organic liquid which dissolves the polymers of the vinyl-type monomers of the first copolymerization but does not dissolve the polymers of the vinyl-type monomers used in the second copolymerization. The dispersion is splendid in dispersion stability and it is very useful as a thermosetting, film-type, coating composition.

Process for producing a non-aqueous system dispersed solution of

Polymeric diacyl peroxides containing ester groups in the molecules are insensitive to impact, friction and heat. Accordingly, they can be safely produced and handled. They are useful as industrial polymerization initiators and they dissolve promptly in vinyl-type monomers.

Polymeric diacyl peroxides

1,1-BIS(TERT-BUTYLPEROXY)CYCLODODECANE DERIVED FROM CYCLODODECANONE AND TERT-BUTYLHYDROPEROXIDE HAS THE FORMULA ##STR1## and is a new, stable and solid compound particularly suitable as a crosslinking agent of polymeric materials.

Growing community of inventors

Aichi, Japan

Masaru Matsushima