Abstract: A biodegradable copolymer having the constituent units represented by the structures (I) and (II): ##STR1## wherein X represents a hydrogen atom, an acyl group having the formula RCO-- where R is a hydrocarbon group having 1 to 20 carbon atoms, an alkoxy group having to 20 carbon atoms, and Y represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and m and n are independently integers of 1 or more, m+n is at least 10, and m/(m+n) is at least 0.01 and a pharmaceutical composition containing the same.

Abstract: A reagent for measuring immune complexes fixed with an anti-C3 antibody Facb fragment. By using the reagent, immune complexes existing in the blood serum or body fluid are quantitatively measured.

Abstract: Hollow water-absorbing polyester filaments, each having fine pores evenly distributed throughout the filament and extending approximately in parallel to the filament axis, are produced by melt-spinning a blend of a polyester and a pore-forming agent consisting of at least one sulfonate compound of the formula:R'SO.sub.3 M'wherein R' is an alkyl radical having 3 to 30 carbon atoms or an aryl or alkylaryl radical having 7 to 40 carbon atoms and M' is an alkali or alkaline earth metal, and by removing at least a portion of the sulfonate compound from the hollow filaments by using an alkali aqueous solution so as to cause a number of fine pores to be formed in the hollow filaments and to cause each hollow to be connected to the outside of the filament through the fine pores.

Abstract: A fire-retardant polyester composition comprising a fiber-forming linear polyester having an intrinsic viscosity of at least 0.1 and a fire retardant containing phosphorus and bromine, wherein at least 70 mole % of the polyester consists of a recurring unit of the formula ##STR1## wherein n represents an integer of 2 to 6, and the fire retardant is a copolyphosphonate composed of 1 mole of a recurring unit of the formula ##STR2## wherein Y represents an isopropylidene or sulfonyl group, and R represents a phenyl or benzyl group,and 0.25 to 10 moles of a recurring unit of the formula ##STR3## wherein R represents a phenyl or benzyl group, the proportion of the fire retardant being 1 to 20 parts by weight per 100 parts by weight of the polyester.

Abstract: New curable monomeric aromatic imidodicarboxylic acid diallyl esters, such as 4-allyloxycarbonyl-N-(allyloxycarbonylmethyl)phthalimide, 1,2-ethylene bis(4-allyloxycarbonylphthalimide), or N,N'-bis(allyloxycarbonylmethyl) pyromellitimide. When heated in the presence of a free radical initiator, these monomers give cured polymers having very superior mechanical strength, thermal stability, chemical resistance and electrical properties. If this polymerization is stopped before the reaction mixture is gelled, prepolymers can be obtained. The cured polymers are especially useful as electronics materials and engineering plastics.

Abstract: A radical initiator-curable diallyl ester composition consisting essentially of 80 - 100% by weight of the following components (A) and (B):A. a prepolymer wherein1. 70 - 100 mole % of its structural units are derived from a diallyl ester selected from the group consisting ofA. a diallyl ester of benzenedicarboxylic acid having the formula (I) ##SPC1##b. a diallyl ester of cyclohexanedicarboxylic acid having the formula (II) ##SPC2##c. a mixture of the above (a) and (b); and2. 30 - 0 mole % of its structural units are derived from other compounds selected from monomeric diallyl esters of dibasic acids and other monomers and polymers, said compound being copolymerizable with said (a) - (c) under the conditions of forming said prepolymer; andB.

Abstract: New curable monomeric aromatic imidodicarboxylic acid diallyl esters, such as 4-allyloxycarbonyl-N-(allyloxycarbonyl-methyl)phthalimide, 1,2-ethylene bis (4-allyloxycarbonylphthalimide), or N,N'-allyloxycarbonylmethyl) pyromellitimide. When heated in the presence of a free radical initiator, these monomers give cured polymers having very superior mechanical strength, thermal stability, chemical resistance and electrical properties. If this polymerization is stopped before the reaction mixture is gelled, prepolymers can be obtained. The cured polymers are especially useful as electronics materials and engineering plastics.

Abstract: The thermal print head comprises a substrate, a semiconductor wafer fabricated thereover, a plurality of junctions formed on the semiconductor wafer, and electrodes to supply an inverse current to the junctions. The junctions are arranged so as to correspond to the pattern of the symbol, such as letters, to be printed. Each of the junctions is used as a heating element. Heat is evolved at the junction when the inverse current flows through the potential barrier which is formed at the junction. The heat evolved is used for the heating element.