Abstract: A needle roller bearing (21) as a roller bearing comprises an outer ring (22) having a plurality of outer ring members (22a) and (22b) split by a split line extending in the axial direction of the bearing, and a plurality of needle rollers (23) arranged along the track surface of the outer ring (22). The outer ring member (22a) is in the form of a semicircular shape having a center angle of 180° and has an engagement click (22c) bent from one circumferential side end to the radial outer side. The two outer ring members (22a) and (22b) are connected in the circumferential direction to form the annular outer ring (22).

Abstract: A roller bearing includes an outer ring formed by connecting a plurality of arc-shaped outer ring members in a circumferential direction and a plurality of rollers arranged along an inner diameter surface of the outer ring. A slope surface (22i) is provided at one or each circumferential end on an inner diameter surface of the outer ring member (22a), and a contour line of the slope surface (22i) is along a direction perpendicular to a revolution direction of the roller.

Abstract: A needle roller bearing (21) as a roller bearing comprises an outer ring (22) formed by connecting a plurality of arc-shaped outer ring members in a circumferential direction, and a plurality of needle rollers (23) arranged along the inner diameter surface of the outer ring (22), and an oil groove (22i) extending in a circumferential direction so as to contain a position opposed to an opening (13e) of an oil path of a housing is formed in the outer diameter surface of the outer ring member.

Abstract: A roller bearing includes an outer ring formed by connecting a plurality of arc-shaped outer ring members in a circumferential direction and a plurality of rollers arranged along an inner diameter surface of the outer ring. A slope surface (22i) is provided at one or each circumferential end on an inner diameter surface of the outer ring member (22a), and a contour line of the slope surface (22i) is along a direction perpendicular to a revolution direction of the roller.

Abstract: A needle roller bearing (21) as a roller bearing comprises an outer ring (22) formed by connecting a plurality of arc-shaped outer ring members in a circumferential direction, and a plurality of needle rollers (23) arranged along the inner diameter surface of the outer ring (22), and an oil groove (22i) extending in a circumferential direction so as to contain a position opposed to an opening (13e) of an oil path of a housing is formed in the outer diameter surface of the outer ring member.

Abstract: A block copolymer having structural formula A-B or A-B-A, wherein A is a crystallizable isotactic polypropylene block segment and B is an amorphous olefin elastomeric block segment; the novel crystallizable block copolymer may be used as it is as a molding material, or as a compatibilizer, a surfactant, a mechanical property improvement agent and the like for other polyemers.

Abstract: A block copolymer having structural formula A-B or A-B-A, wherein A is a crystallizable isotactic polypropylene block segment and B is an amorphous olefin elastomeric block segment; the novel crystallizable block copolymer may be used as it is as a molding material, or as a compatibilizer, a surfactant, a mechanical property improvement agent and the like for other polyemers.

Abstract: A propylene resin composition which is improved in performance of properties, which has a uniform structure, which is high in mechanical strengths and which is excellent in heat resistance, rigidity, impact resistance, moldability and the like, containing a propylene resin and an elastic material, which composition is provided by a specific morphology that the separated micro phase structure of a specific elastic material present in a propylene resin composition as measured by an acoustic microscope has a percolation structure.

Abstract: A method of forming a coating film, involving the steps of: (i) forming an electrodeposition coat on a substrate; (ii) forming thereon an impact resistant primer coat formed of (A) a polyolefin resin grafted with an acid component and (B) a butylated melamine resin, wherein the weight ratio (A/B) of the polyolefin resin to the melamine resin is 90 to 50 parts by weight of the polyolefin resin:10 to 50 parts by weight of the melamine resin; (iii) forming an intermediate coat thereon; and (iv) forming a top coat thereon. A laminated coating film may be obtained by the method disclosed.

Abstract: A method of producing a curable composition containing a prepolymer having a polythioether skeleton, characterized by comprising addition reacting (A) 4,4'-bis(methacryloylthio)-diphenylsulfide having the formula (I): ##STR1## wherein R is a polyvalent organic group composed of an aliphatic or aromatic hydrocarbon and n represents an integer of 2 or more, with the functional group equivalent ratio of the mercapto groups of the component (B) (ii) to the methacryloyl groups of the component (A) being from 0.02 to 1.01, in another vinyl monomer copolymerizable with 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I) in the presence of a base catalyst.

Abstract: 4,4'-Bis(methacryloylthio)diphenylsulfide having the formula (I): ##STR1## and a curable composition characterized by comprising: (A) 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I):(B) (i) another vinyl monomer copolymerizable with 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I), and (ii) a polythiol represented by the formula (II):R-(SH).sub.n (II)wherein R is a polyvalent organic group and n represents an integer of 2 or more, wherein the content of the component (B)(i), when the component (B)(i) is present, in the total amount of said components (A), (B)(i) and (B)(ii) is 10 to 90% by weight, and the functional group equivalent ratio of the mercapto groups of the component (B)(ii), when the component (B)(ii) is present, to the methacryloyl groups of the component (A) is from 0.02 to 1.