Provided is a powder slush molding composition including a thermoplastic polyester elastomer (TPEE) having a peak melting point of 130 to 200 °C, as measured by differential scanning calorimetry (DSC). The composition has a Shore A hardness not higher than 95 and a melt index (190 °C, 2.16 kg) of 10 to 100 g/10 min.

Provided are: a powdered material for slush molding; and a manufacturing process therefor. The powdered material is less odorous, exhibits excellent powder fluidity, and does not suffer from troubles resulting from the sliding-down or agglomeration of a pigment even when the resin particles have been pigmented on the surfaces thereof. Thus, the powdered material ensures high productivity. The powdered material is a powdered polyurethane urea resin composition which comprises (D) a polyurethane urea resin that has a total content of bimolecular condensate of acetone, bimolecular condensate of methyl ethyl ketone, and bimolecular condensate of methyl isobutyl ketone of 1,000ppm, or less and (N) an additive, wherein the polyurethane urea resin (D) takes the form of thermoplastic polyurethane urea resin particles (P) that have a volume-mean particle diameter of 20 to 500µm and that have protrusions and recesses on the surfaces. The powdered polyurethane urea resin composition is manufactured by a manufacturing process which includes a step of mixing (A) an isocyanato-terminated urethane prepolymer with (B) an alicyclic diamine and/or an aliphatic diamine in an aqueous medium by stirring to form the resin particles (P).

In a rod sealing system, which comprises a buffer ring, a rod seal, and a dust seal, provided successively in this order from a fluid hydraulic side toward the outside in an annular clearance between two members in reciprocating motion, the buffer ring is made up of a thermoplastic polyurethane molding product obtained by subjecting a thermoplastic polyurethane molding product prepared by reaction of (A) a high molecular weight polycarbonatediol having a number average molecular weight Mn of 500-6,000, (B) an aromatic diisocyanate, and (C) a low molecular weight diol as a chain elongation agent in an NCO/OH ratio of 0.95-1.20,to heat treatment under conditions that a glass transition point (Tg) of hard phases becomes 170 °C or higher, preferably 170- 230 °C , and an endothermic peak area (ΔH) at Tg becomes 5J/g or more, by differential scanning calorimetry. The buffer ring made up of the thermoplastic polyurethane molding product has a distinguished heat resistance capable of withstanding the service environmental temperature, particularly maximum 120°C, compression set characteristics, follow-up to eccentricity, etc.

Die vorliegende Erfindung betrifft aliphatische, lichtstabile, sinterfähige, thermoplastische Polyurethanformmassen mit verbessertem Ausblühverhalten und guter thermischer Beständigkeit sowie guter technischer Verarbeitbarkeit.

A powdered resin composition for slush molding comprising a thermoplastic polyurethane resin powder (B) as the main component and a fine particle powder (A) of a vinyl type copolymer comprising a copolymer of a monomer (a01) having one vinyl group such as methyl methacrylate and a monomer (a02) having two or more vinyl groups such as ethylene glycol dimethacrylate and having a cross-linked structure; or a fine particle powder (E) of a vinyl type copolymer comprising the (a01) and a monomer (a03) having one or more vinyl groups and one or more functional groups other than a vinyl group such as hydroxyethyl (meth)acrylate and having a cross-linked structure. The fine particle powder is a powder flowability improver which does not cause die stains and the powdered resin composition for slush molding containing the fine powder do not cause staining of molds.

Disclosed are core-shell resin particles (C2) each comprising one or more film-like shell layers (P) comprising a resin (a) which is a polyurethane resin and a core layer (Q) comprising a resin (b). A core-shell resin particle (C2) is characterized in that the weight ratio between (P) and (Q) is from 0.1:99.9 to 70:30, the volatile content in the resin particle (C2) is not more than 2 weight %, and the content of vinyl resins in the resin (b) is not more than 30 weight %. Such resin particles have a uniform particle diameter and are excellent in electrostatic properties, thermal and storage stability and thermal characteristics.

Die vorliegende Erfindung betrifft aliphatische lichtstabile sinterfähige thermoplastische Polyurethane mit verbessertem Knickverhalten, mit geringem Fogging, guter thermischer Beständigkeit, angenehmer Haptik und guter technischer Verarbeitbarkeit sowie deren Verwendung.