Abstract: A resin composition of the invention includes a thermoplastic elastomer and a glycol or its derivative. Polyamide- or polyester-based thermoplastic elastomers, for example, can be used as the thermoplastic elastomer. The soft segment of the thermoplastic elastomer may be composed of a polyether or polyester. As the glycol or its derivative, for example, a compound represented by the following Formula (1): R1O&Parenopenst;A1—O&Parenclosest;l&Parenopenst;A2—O&Parenclosest;m&Parenopenst;A3—O&Parenclosest;nR2  (1) (wherein each of R1 and R2 is, identical to or different from each other, a hydrogen atom, an alkyl group or an acyl group; each of A1, A2 and A3 is, identical to or different from one another, an alkylene group having 2 or more carbon atoms; each of l, m and n is, identical to or different from one another, an integer of 0 or more, where l+m+n>0) can be used.

Abstract: A concrete retarder comprises a polymer (A) having the concrete set retarding ability. The polymer (A) has, as a structural unit, a low glass transition temperature (Tg) component with a Tg of not higher than −5° C., and a surface tension of 45 mN/m or lower. The proportion of the low Tg component having a glass transition temperature (Tg) of not higher than −5° C. is 10% by weight or more relative to the whole polymer (A). The polymer (A) has a functional group which can form a salt with a metal ion (particularly, a free acid group or a group capable of forming an acid group by hydrolysis). The polymer (A) is a vinyl-series polymer, a polyester (saturated or unsaturated polyester), or a crosslinked or graft polymerized unsaturated polyester. A sheet and a decorative pack may be formed with the concrete retarder.

Abstract: A polymer comprising an anionic group (e.g. an acid anhydride group, a carboxyl group) and a hydrophilic segment (e.g. a polyoxyalkylene ether unit) is used as a cement retarder. The polymer is obtainable by copolymerization of a monomer including maleic anhydride with a monomer including a vinylalkyl ether-series monomer in which an alkylene oxide is added to allyl alcohol. The polymer may be a copolymer copolymerized with other monomers such as styrene. Use of this cement retarder can provide patterns or washing-finished face on the surface of a concrete product. The cement retarder is suitable for application for a cement retardative sheet.

Abstract: An air-pressure joint 1 comprising a pipe main body 2 made of a rigid thermoplastic resin and a release ring 3 made of a rigid thermoplastic resin inserted from one opening of the pipe main body, wherein the release ring includes a slip-off preventing protrusion 13 on an outer circumferential surface of its insertion site; and the pipe main body 2 includes a ring-shaped sealing portion 9 made of an elastic resin and integrally formed on an inner circumferential surface thereof, an insertion mouth pipe portion 7 made of a rigid rigid resin, coaxially disposed to abut one opening side portion of the pipe main body 2 and forming a recess groove 10 on an inner circumferential surface of an abutting portion thereof for stopping the slip-off preventing protrusion 13 of the release ring 3, and a ring-shaped connecting portion 8 made of a rigid synthetic resin and integrally molded to an outer circumferential surface of the abutting portion of this mouth pipe for connecting the insertion mouth pipe portion 7 to the p

Abstract: A saturated polyester obtained by a reaction of a polycarboxylic acid component comprising a polycarboxylic acid having 2 to 6 carbon atoms in the main chain (e.g. maleic anhydride), and a polyol component comprising a polyhydric alcohol having 2 to 4 carbon atoms or its condensate is used as a cement retarder. A retardative sheet can be formed by applying or impregnating a composition comprising the retarder and a tacky adhesive to a base sheet. By forming a predetermined pattern with the use of the retarder or sheet in a form, depositing a mortar composition, washing a surface of the hardened concrete, and washing out uncured mortar, a figure or a washing finished surface is formed on a surface of a concrete product.

Abstract: A polymer comprising an anionic group (e.g. an acid anhydride group, a carboxyl group) and a hydro-philic segment (e.g. a polyoxyalkylene ether unit) is used as a cement retarder. The polymer is obtainable by copolymerization of a monomer including maleic anhydride with a monomer including a vinylalkyl ether-series monomer in which an alkylene oxide is added to allyl alcohol. The polymer may be a copolymer copolymerized with other monomers such as styrene. Use of this cement retarder can provide patterns or washing-finished face on the surface of a concrete product. The cement retarder is suitable for application for a cement retardative sheet.

Abstract: A cement retarder which comprises a saturated or unsaturated polyester obtained by a reaction of a polycarboxylic acid component comprising a polycarboxylic acid having 2 to 6 carbon atoms in the main chain or its derivative, and a polyol component containing a polyhydric alcohol having 2 to 4 carbon atoms or its condensate, wherein:(a) the saturated polyester has a weight average molecular weight of about 300 to about 50,000; or(b) the unsaturated polyester has a weight average molecular weight of about 500 to about 25,000; or(c) the polyhydric alcohol used to obtain the saturated or unsaturated polyester is a condensate of a C.sub.2-4 alkylene glycol; or(d) the saturated polyester is a polyester obtained by the use of a condensate of a C.sub.2-4 alkylene glycol and has a weight average molecular weight of about 300 to about 50,000; or(e) the unsaturated polyester is a polyester obtained by the use of a condensate of a C.sub.

Abstract: A composite member is obtained which includes a thermoplastic resin and a rubber directly and firmly adhering to each other. A composite member is obtained by adhering a molded element of a thermoplastic resin including a homo- or co-polymer of a vinyl cyanide including acrylonitrile, and a rubber molded element constituting a rubber composition containing a vinyl cyanide as a comonomer by means of heating. The resin molded element may be formed from, for example, AS resin, ABS resin or an polymer alloy containing ABS resin. The rubber molded element may be composed of a vulcanizable rubber composition containing NBR or another rubber. Both the molded elements can adhere to each other by contacting the resin molded element with the rubber molded element closely and heating at least either the resin molded element or the rubber molded element by means of melting, vulcanization or the like.

Abstract: An emulsion type primer for powder coating, which is pollution-free and excellent in safety, achieves a good adhesion between a metallic material and a synthetic resin coating and contains water as a medium, and a process for producing a metallic material coated with a synthetic resin by using this primer.This primer comprises an acid-modified diene polymer, an organic amine or ammonia and water.A metallic material coated with a synthetic resin is produced by applying the primer composition onto the metallic surface, curing the same by baking and then coating it with the synthetic resin by the fluidized bed dip coating method or the electrostatic coating method.