The polymerizable composition for an optical material of the present invention includes a compound (A) represented by General Formula (a) and including two or more allyloxycarbonyl groups, at least one kind of radical polymerization initiator (B) selected from the group consisting of a peroxyketal-based radical polymerization initiator, a peroxymonocarbonate-based radical polymerization initiator, and a peroxyester-based radical polymerization initiator, and a modifier (C) selected from a polyether modified siloxane compound represented by General Formula (c1) or a polyol compound represented by General Formula (c2). ##STR00001##

The present disclosure is directed to provide a methacrylic resin and a methacrylic resin composition which enable production of a shaped article excellent in color tone in a long path length. A methacrylic resin of the present disclosure has a structural unit (X) including a cyclic structure in a main chain thereof. The methacrylic resin having a glass transition temperature (Tg) of higher than 120° C. and 160° C. or lower. An emission intensity at 514 nm in terms of a concentration of a solution of fluorescein in ethanol is 30×10.sup.−10 mol/L or less when a solution containing 2.0 mass % of the methacrylic resin in chloroform is spectroscopically analyzed using an excitation wavelength of 436 nm and a slit width of 2 nm.

The present invention relates to a polymeric composition comprising a polymer comprising monomers of methyl methacrylate and methacrylic acid. In particular the present invention relates to a process for making a polymeric composition suitable for moulded objects, said polymeric composition is comprising monomers of methyl methacrylate and methacrylic acid. The present invention concerns also process for making a moulded object comprising a polymer comprising monomers of methyl methacrylate and methacrylic acid. The present invention concerns also moulded object comprising a polymer comprising monomers of methyl methacrylate and methacrylic acid.

The present invention relates to a polymeric composition comprising a polymer comprising monomers of methyl methacrylate and methacrylic acid. In particular the present invention relates to a process for making a polymeric composition suitable for moulded objects, said polymeric composition is comprising monomers of methyl methacrylate and methacrylic acid. The present invention concerns also process for making a moulded object comprising a polymer comprising monomers of methyl methacrylate and methacrylic acid. The present invention concerns also moulded object comprising a polymer comprising monomers of methyl methacrylate and methacrylic acid.

The present invention relates to copolymers, to a method for the preparation of these copolymers, to the use of these copolymers for reducing wear in a lubricant composition, to lubricant compositions comprising these copolymers, and to the use of these lubricant compositions as an automatic transmission fluid, a continuously variable transmission fluid, an engine oil, a gear oil, or a hydraulic oil.

A method for producing polytetrafluoroethylene includes a step of polymerizing tetrafluoroethylene in an aqueous medium in the presence of a hydrocarbon surfactant and a polymerization initiator to obtain polytetrafluoroethylene and a step of adding at least one selected from the group consisting of a radical scavenger and a decomposer of a polymerization initiator after the initiation of polymerization.

A method for producing polytetrafluoroethylene includes a step of polymerizing tetrafluoroethylene in an aqueous medium in the presence of a hydrocarbon surfactant and a polymerization initiator to obtain polytetrafluoroethylene and a step of adding at least one selected from the group consisting of a radical scavenger and a decomposer of a polymerization initiator after the initiation of polymerization.

The present invention relates to a composition comprising at least one (meth)acrylic monomer, optionally at least one (meth)acrylic polymer and at least one organic peroxide chosen from hemiperoxyacetals. The invention also relates to the use of said at least one organic peroxide for the polymerization of a composition comprising at least one acrylic monomer and optionally at least one acrylic polymer, to the use of the composition of the invention for the manufacture of resins, to a process for manufacturing thermoplastic, thermoset or composite parts, and also to the parts obtained themselves.

The present invention relates to a composition comprising at least one (meth)acrylic monomer, optionally at least one (meth)acrylic polymer and at least one organic peroxide chosen from hemiperoxyacetals. The invention also relates to the use of said at least one organic peroxide for the polymerization of a composition comprising at least one acrylic monomer and optionally at least one acrylic polymer, to the use of the composition of the invention for the manufacture of resins, to a process for manufacturing thermoplastic, thermoset or composite parts, and also to the parts obtained themselves.

The present invention aims to provide a thermosetting resin composition that causes no environmental issues such as generation of VOCs and has curability (especially, curability at low temperature) as good as that in the case using a diallyl phthalate monomer as a crosslinking agent. The present invention reveals that the following thermosetting resin composition has excellent curability at low temperature. The thermosetting resin composition contains an unsaturated polyester resin; an alicyclic polyfunctional allyl ester represented by the following formula (1) [in the formula, n is an integer of 2 to 4 and Z is an n-valent alicyclic hydrocarbon group]; and an initiator having a one-minute half-life temperature in a range of 100 C. to 250 C. and a molecular weight of 100 to 400 and selected from the group consisting of peroxyketals, peroxyesters, dialkyl peroxides, and peroxy carbonates.

[Chem. 1]

ZCOOCH.sub.2CHCH.sub.2)(1)