Abstract: Flame retardation of 1,2-polybutadiene based upon the use of halogenated bisphenol bisacrylate reactive flame retardants, for example, 2,2-bis(4-methacryloyl-3,5-dibromophenyl)-propane. Flame retardancy performance of UL 94 V-0 or V-1 has been achieved without impairing desirable dielectric properties and heat resistance inherently possessed by 1,2-polybutadiene. If an aromatic bismaleimide modifier, for example, N,N'-4,4'-diphenylmethane bismaleimide, is jointly used, a thermal expansion coefficient less than a half of the thermal expansion coefficient of cured 1,2-polybutadiene can be achieved.

Abstract: An electro optical modulation system utilizes electro optical effect of a crystal. The electro optical modulation system comprises a voltage comparator for comparing a modulated light intensity signal with a reference voltage; and a bias controlling device which feeds a differential signal between mean value signal of the output of the voltage comparator and mean value signal of the inverted output of the voltage comparator, to an optical modulator as a bias voltage.

Abstract: A novel 2-[4-(3-methyl-2-thienyl)phenyl]propionic acid and a pharmaceutically acceptable salt thereof. These compounds are useful for treating symptoms of inflammation and pain in mammals including man. This disclosure relates to such compounds, a process for producing the same, a pharmaceutical composition containing such a compound and a method for treating symptoms of inflammation and pain.

Abstract: A reinforcing composition for mineral structures which comprises as reactive ingredients one or more radical-polymerizable or copolymerizable monomer and a bisulfite ion-supplying substance. The use of the reinforcing composition facilitates reinforcement of natural or artificial mineral structures and products.

Abstract: Novel sym.-triazines having the formula: ##EQU1## wherein R.sup.1 is a substituted or unsubstituted alkyl, alkenyl, cycloalkyl, cycloalkylalkyl, aralkyl or heterocyclic alkyl group; R.sup.2 is a hydrogen atom or a substituted or unsubstituted alkyl, alkenyl, cycloalkyl, cycloalkylalkyl, aryl, aralkyl or heterocyclic alkyl group; and Z.sup.1 and Z.sup.2, which may be the same or different, each represents oxygen or sulfur, have a central nerve inhibitory activity, an anti-inflammatory activity, an analgesic activity and a sedative activity, and can be prepared by reacting a 2,4-dichloro-6-substituted sym.-triazine with a compound having the formula HO--R.sup.2 in which R.sup.2 is the same as defined above.

Abstract: Dry process for the production of inorganic granular substances coated with plastics, characterized in that a radical-polymerizable vinylic monomer carried on the surface of an inorganic granular substance is brought in a gaseous phase into contact with gaseous sulfur dioxide to effect polymerization of the monomer. The resulting plastic-coated inorganic substances are useful in various fields of industry, for example, as fillers, construction materials, molding materials, electrode materials, delayed-action fertilizers, etc.

Abstract: A transition metal compound in powdered form or a mixture of a transition metal compound and other inorganic compounds in powdered form can be effectively coated with a polymer by contacting such powder with a vinyl monomer in the presence of hydrogen sulfite ions (HSO.sub.3 .sup.-).

Abstract: Particulate solids are coated with a polymer by bringing a particulate solid selected from glass particles, abrasive particles and sand particles into contact with a vinyl monomer in the presence of a polymerization intiator consisting essentially of bisulfite ions.

Abstract: Metal powder is suspended in an aqueous medium containing a radical-polymerizable monomer and polymerization is conducted in the presence of an acidic sulfite ion to produce a plastic coated metal powder which is effectively used for forming conductive plastics, molded articles for sintering, pressed powder magnetic cores and the like.

Abstract: A method of manufacturing reinforced resin moldings, wherein a fiber-reinforced plastic, obtained by the polymerization, in the presence of an inorganic fibrous substance selected from the group consisting of glass fiber, slag wool and asbestos, of a vinyl monomer, within an aqueous medium in the presence of sulfur dioxide, said fiber-reinforced plastic being composed of 5 - 50 wt.% of resin and 95 - 50 wt.% of inorganic substance and coated with a polymer, is subjected to compression molding.