Abstract: A method for forming a spacer of an optical fiber cable includes the steps of providing a tension member and covering it with a spacer body of crystalline thermoplastic resin, the spacer body being formed on its outer periphery with a plurality of grooves each for supporting an optical fiber therein. An apparent diameter d0 of the tension member and a target diameter d3 of the spacer body measured at bottoms of the grooves are so determined as to satisfy an expression 0.5<d0/d3<1.

Abstract: A single-core cord of reinforced optical fiber comprising an optical fiber element including an optical fiber and a primary coating formed of silicone rubber and covering the optical fiber, and a secondary coating covering the optical fiber element. The secondary coating has a three-layer structure which comprises a reinforcing inner layer formed of longitudinally arranged reinforcing fibers and cured non-styrene binder comprising an unsaturated polyester resin containing a non-styrene monomer as a cross-linking agent, a reinforcing outer layer formed of fiber-reinforced cured styrene resin and a surface layer formed of thermoplastic resin, the reinforcing outer layer and the surface layer being intimately bonded together with an anchoring effect therebetween.

Abstract: A method for forming a spacer of an optical fiber cable includes the steps of providing a tension member and covering it with a spacer body of crystalline thermoplastic resin, the spacer body being formed on its outer periphery with a plurality of grooves each for supporting an optical fiber therein. An apparent diameter d0 of the tension member and a target diameter d3 of the spacer body measured at bottoms of the grooves are so determined as to satisfy an expression 0.5<d0/d3<1.

Abstract: A compound of the formula: ##STR1## in which R.sup.1 represents alkyl, cycloalkyl or aralkyl, R* represents fluorophenyl or trifluoromethylphenyl when R.sup.1 is alkyl; R* represents dichlorophenyl, neopentyl, trimethylsilylmethyl, dimethylphenylsilylmethyl or a group of the formula: ##STR2## wherein R.sup.2 represents halogen, trifluoromethyl, lower alkyl or lower alkoxy when R.sup.1 is cycloalkyl; or R* represents 2-thienyl, 3-thienyl, neopentyl, trimethylsilylmethyl, imethylphenylsilylmethyl or a group of the formula: ##STR3## wherein R.sup.3, R.sup.4 and R.sup.5 independently represent hydrogen, halogen, trifluoromethyl, lower alkyl or lower alkoxy when R.sup.1 is aralkyl, m represents 1 or 2, and X represents halogen, imidazolyl, triazolyl, phenylthio or a radical selected from the group consisting of: ##STR4## wherein R.sup.6 represents alkyl, R.sup.7 and R.sup.8 independently represent lower alkyl and R.sup.9 and R.sup.

Abstract: A method of continuous molding a rod-like product includes forming an uncured rod-like molding by passing reinforcing fibers impregnated with uncured thermosetting resin through a squeezing die having a predetermined shape. Molten thermoplastic fluororesin is extruded in a ring shape to enclose the rod-like molding. A sheathing layer of the thermoplastic resin is formed by causing the thermoplastic resin to come into contact with the outer periphery of the uncured rod-like molding and by cooling and solidifying the thermoplastic resin. The uncured rod-like molding and the sheathing layer are introduced into a heated tank thereby hardening the thermosetting resin. The sheathing layer is stripped from the molding to form a rod-like product having a surface of fiber reinforced thermosetting resin.

Abstract: A reinforced optical fiber includes a reinforcing inner layer interposed between a buffer layer of silicon rubber and a FRP layer made of styrene resin and fibers. The reinforcing inner layer is formed by binding filaments attached longitudinally onto the buffer layer with a non-styrene resin. The additional reinforcing inner layer improves crushing resistance and also keeps low an increase of transmission loss. The reinforcing inner layer directly covering the buffer layer is formed by the steps of longitudinally attaching dry filaments to the buffer layer and then impregnating the filaments with a curable resin.

Abstract: A method of forming a fiber reinforced synthetic resin rod-like molding including a rod-like core portion having at least in the outer portion thereof a reinforcing fiber bundle integrally adhered together by a thermosetting resin and a thermoplastic resin layer coating the core portion is disclosed. The outer surface portion of the core portion and the inner surface portion of the thermoplastic resin layer are integrally adhered together due to an anchor effect generated by contacting between the thermosetting resin and the thermoplastic resin in a semifluid state under pressure.

Abstract: A tri-organotin silatrane derivative represented by the general formula (I) ##STR1## wherein the R.sup.1 groups are identical or different and each represents an alkyl, cycloalkyl, aryl or aralkyl group, R.sup.2, R.sup.3 and R.sup.4 are identical or different and each represents a hydrogen atom or a lower alkyl group, and m is a number of 2 or 3.The tri-organotin silatrane derivatives of the formula (I) are prepared by subjecting a 1-mercaptoalkylsilatrane and a tri-organotin hydroxide or bis(tri-organotin) oxide to a dehydration reaction, or reacting a 1-mercaptoalkylsilatrane derivative with a tri-organotin halide in the presence of a dehydrohalogenation agent, or subjecting a trialkoxysilane and a trialkanolamine to an ester-interchange reaction in the presence of an alkaline catalyst.The tri-organotin silatrane derivatives of the formula (I) are useful for an agricultural-horticultural pesticide, an industrial fungicide, an epidemic-preventing insecticide or an antifouling agent.

Abstract: An antifouling agent comprising as an antifouling component a substantially linear triorganotin-containing copolymer containing (a) at least one kind of N-coordinated triorganotin-containing recurring units of the formula (Ia) or (Ib) represented in the specification and (b) comonomer recurring units derived from at least one ethylenic vinyl compound as a comonomer. The antifouling agent is applied to a structure which is needed to be protected from fouling organisms to form a film of the copolymer on the structure.

Abstract: A molten thermoplastic resin is extruded in the form of a double-layer cylindrical hollow film with the two film layers being interconnected with each other by a number of spaced legs and is then immediately passed through an annular gap defined by annular side walls of inner and outer vessels in such a manner that the two film layers are in contact with the respective side walls defining the gap. Coolant is supplied to the inner and outer vessels and overflows above the side walls to bring the coolant into contact with the resin. The level of the coolant overflowing above both side walls is adjusted to be equal and also to have a liquid pressure on the extruded resin balanced with a gas pressure supplied in between the two film layers and the legs of the extruded resin.

Abstract: An agricultural or horticultural miticidal composition for controlling mites which cause damage to plants, said miticidal composition comprising(1) a liquid carrier and/or a solid carrier, and(2) as an active ingredient, a trialkyltin compound of the formula ##STR1## wherein R.sup.1 represents a linear alkyl group having 6 to 11 carbon atoms, R.sup.2 represents a hydrogen atom or a methyl group, the total number of carbon atoms of R.sup.1 and R.sup.2 is from 7 to 11, m is an integer of 1 or 2, and X represents a chlorine atom, a bromine atom, a fluorine atom, a hydroxyl group, an acyloxy group, a dithiocarbamate group or a group of the formula --SR.sup.3, in which R.sup.3 represents an alkyl group having 1 to 12 carbon atoms or an aryl group, when m is 1, and a member selected from the class consisting of an oxygen atom, a sulfur atom and a sulfuric acid group when m is 2; and a method for controlling mites using the same.

Abstract: An elastic strapping band is essentially made of ethylene-vinyl acetate copolymer containing vinyl acetate in the range of 3 to 20 wt %. The band has molecular orientation in the lengthwise direction thereof with a double refraction rate (.DELTA.n) being in the range of 24.times.10.sup.-3 to 38.times.10.sup.-3. The band has a tensile strength higher than 3.3 kg/mm.sup.2, a stress residual rate higher than 15% after elongating the band under an initial load of 3.3 kg/mm.sup.2, and an elasticity recovering rate higher than 70%.

Abstract: In a strapping band comprising a tape-shaped core having continuous reinforcing fibers combined together with a thermosetting resin and an outer layer of thermoplastic resin covering the tape-shaped core, the thermoplastic and thermosetting resins each has polymeric units derived from the same monomer.

Abstract: A halogen-containing resin composition stable to heat and light comprising a halogen-containing resin and a stabilizing amount of a heterocyclic glycidyl compound containing a 5- or 6-membered heterocyclic ring with 2 or 3 nitrogen atoms to at least one of which a glycidyl group is directly bonded.

Abstract: The rope of this invention comprises a plurality of strands each having a twisted reinforcing fiber bundle, thermosetting resin applied to the fiber bundle, and a thermoplastic resin cover enclosing the fiber bundle. Each strand in the rope is kept to substantially a round sectional shape by the twisted fiber bundle.The method for forming the rope comprises the steps of twisting the reinforcing fibers in such a manner that the tensile strength of the twisted fibers is not reduced to less than 50% of the fibers not twisted, applying an uncured thermosetting resin to the twisted fibers, covering the fibers with a molten thermoplastic resin, cooling the thermoplastic resin to cover the fibers with solidified thermoplastic resin and thereby forming a strand, forming a rope structure from a plurality of the strands, and heating the rope structure to cure the thermosetting resin applied on the fibers.

Abstract: A continuously supplied reinforcing material is impregnated with an uncured thermosetting resin and shaped into a predetermined sectional configuration, which is then covered with a forcibly extruded molten thermoplastic resin. The thermoplastic resin is immediately cooled to enclose the shaped fiber material with the solidified thermoplastic resin, and a thus continuously formed material is obtained.

Abstract: A curable epoxy resin composition comprising an epoxy resin and a reactive diluent, at least 60% by weight of the total amount of said reactive diluent consisting of a specific etherified polyepichlohydrin monoglycidyl ether and/or etherified polymethylepichlorohydrin monoglycidyl ether. The above etherified product is prepared by addition-polymerizing 2 to 10 mols of a compound selected from the group consisting of epichlorohydrin and methylepichlorohydrin with a monohydric phenol or alcohol and treating the resulting addition polymer with an alkaline substance.