Nippon Oil Fats Co., Ltd.

Asahi Optical Co., Ltd.

Yasuo Moriya

Nobuyoshi Suzuki

Hiroshi Goto

Masaharu Nakayama

Kyosuke Fukushi

Yuji Okada

Takeshi Komai

Kazunori Kagei

Toru Deguchi

Resin compositions obtained by causing copolymerization of particular radical (co-and/or) polymerizable organic peroxide and vinyl monomer in particular propylene polymers and that it is a best way to use an aqueous suspension in the manufacture.

Graft polymerization precursor and method of manufacturing the same

Resin compositions obtained by causing copolymerization of particular radical polymerizable organic peroxide and vinyl monomer in an ethylene polymer and that it is a best way to use a water suspension in the manufacture.

Graft polymerization preformer and method of manufacturing the same

Resin compositions obtained by causing copolymerization obtained by causing copolymerization of particular radial (co-and/or) polymerizable organic peroxide and vinyl monomer in particular ethylene (co-and/or) polymers and that it is a best way to use a water suspension in the manufacture.

A graft precursor is formed by preparing a propylene polymer suspension having a propylene polymer suspended in water and a solution having a specific radically (co)polymerizable organic peroxide and a specific radical polymerization initiator dissolved in specific amounts in a vinyl monomer, mixing the propylene suspension and the solution in a specific ratio, heating and stirring the resultant mixture under conditions incapable of inducing substantial decomposition of the polymerization initiator, and further elevating the temperature of the mixture after the total amount of the vinyl monomer, the radically (co)polymerizable organic peroxide, and the radical polymerization initiator has decreased to less than 50% by weight of the initial total amount. Then a graft resin composition is produced by melting and kneading the graft precursor, either by itself or in combination with a propylene polymer and a vinyl polymer, at a temperature in the range of 100.degree. to 300.degree. C. thereby effecting a grafting reaction of the mixture.

Method for production of graft resin composition

A graft polymerization precursor is prepared through polymerization caused by impregnating an ethylene polymer with a vinyl monomer and a radical polymerizable PO, or a mixture of this graft polymerization precursor and an ethylene polymer and vinyl polymer, is kneaded in a molten state at 100.degree. to 300.degree. C. By so doing, a resin composition having a revolutionary high grafting efficiency can be obtained, so that secondary coagulation can be prevented.

Method of manufacturing a grafted resin composition

An ethylene-acrylic acid ester copolymer can be easily grafted in a high graft efficiency with a peroxy group-containing block copolymer consisting of segments of copolymer A, which is a copolymer of a (meth)acrylic acid ester monomer or its mixture with a radically copolymerizable monomer, with a radically copolymerizable peroxycarbonate, and segments of (co)polymer B, which is different from copolymer A in the monomer composition and does not contain a monomer unit of the radically copolymerizable peroxycarbonate. The grafted ethylene-acrylic acid ester copolymer can be effectively used as a compatibilizing agent in a polymer blend of polyolefin with styrene (co)polymer, as an emulsifying agent in an emulsion of high polymer, or as an adhesive at the interface of polyolefin and styrene (co)polymer.

Method for producing a grafted ethylene-acrylic acid ester copolymer

A block copolymer consisting of segments of copolymer A, which is obtained by copolymerizing a (meth)acrylic acid ester monomer with a radically copolymerizable peroxycarbonate and has peroxy groups in its main polymer chain, and segments of (co)polymer B, which is different from copolymer A in the monomer composition and does not contain peroxy groups, can modify matrix resin without deteriorating the mechanical property of the resin.

Block copolymer

A block copolymer consisting of segments of copolymer A, which is obtained by copolymerizing an aromatic vinyl monomer with a radically copolymerizable peroxycarbonate and has peroxy groups in its main polymer chain, and segments of (co)polymer B, which is different from copolymer A in the monomer composition and does not contain peroxy groups, can modify matrix resin without deteriorating the mechanical property of the resin.

A plastic lens which has high hardness and excellent scratch resistance and can form a transparent and uniform reflection preventing film through vacuum deposition, is produced by mixing

Method for producing a plastic lens

Disclosed herein is a low shrinkable unsaturated polyester resin composition consisting of (A) 20-70% by weight of an unsaturated polyester, (B) 28-60% by weight of a monomer polymerizable with the above unsaturated polyester, and (C) 2-20% by weight of a block copolymer mixture. The mixtures of the monomer (B) and the block copolymer mixture (C), and a mixture of the polyester (A), the monomer (B), and the block copolymer mixture (C) are in a non-aqueous dispersion state. The block copolymer mixture is obtained by polymerizing either one of the monomers defined below in (a) and (b) with a polymerization initiator a polymeric perioxide represented by the formula: ##STR1## in which R.sub.1 represents a divalent branched hydrocarbon group having 10-30 carbons, and R.sub.2 and R.sub.3 represent a hydrogen atom, a hydroxyl group or an alkali metal, and the average polymerization degree n is 2-40, and is used to obtain a first polymer having peroxy bonds in its molecule, and block-polymerizing the first polymer with the remaining monomer (a) or (b) which has not been used in the first polymerization reaction wherein, (a) is a monomer or a monomer mixture consisting of 70-100% by weight of styrene monomer and 30-0% by weight of a monomer polymerizable therewith.

Low shrinkable unsaturated polyester resin composition

Method for producing a plastic lens using tertiary alkyl peroxy allyl

Styrene-type monomers are polymerized, or mixtures of styrene-type monomers and other vinyl type monomers and copolymerized, at 50.degree.-120.degree. C. using 1-10 wt%, based on the weight of the monomers, of an organic peroxide polymerization initiator whose decomposition temperature at 10 hours of halflife is 40.degree. C. to 70.degree. C. whereby colorless low molecular weight styrene series polymers are obtained at a high yield, using polymerization apparatus of simple structure.

Growing community of inventors

Aichi, Japan

Yasuo Moriya