Patent ID: 9550874
Date: 2017-01-24
CPC Classifications: B29B,B29C,C08G,C08J,C08K,C08L

Claim:
1. A method for producing the powdery polyurethane urea resin composition for slush molding comprising: a polyurethane urea resin (D) whose total content of a dicondensate of acetone, a dicondensate of methyl ethyl ketone, and a dicondensate of methyl isobutyl ketone is 1,000 ppm or less, and an additive (N), wherein the polyurethane urea resin (D) has formed thermoplastic polyurethane urea resin particles (P) having irregularities on the surface thereof and having a shape factor SF1 of from 101 to 200, a shape factor SF2 of from 120 to 240, and a volume-average particle diameter of from 20 to 500 μm, the method comprising the step of: obtaining thermoplastic polyurethane urea resin particles (P) having irregularities on the surface thereof by performing a polymerization reaction, formation of primary particles having a volume-average particle diameter of 0.1 to 60 μm, and granulation by coalescence of the primary particles by mixing and stirring a mixture (M) composed of: with an isocyanate group-terminated urethane prepolymer (A), wherein the-additive (N) is added and mixed in any of the step of obtaining the (P) or the step of obtaining the (A) or the raw material thereof before the step of obtaining the (P), or the step after obtaining the (P), wherein the prepolymer (A) is formed from an aliphatic diisocyanate (a1) and an active hydrogen component comprising a monool (a2), a high molecular diol (a3) having a number-average molecular weight of from 500 to 10,000 and an active hydrogen-containing compound represented by formula (1): wherein, in formula (1), R R Y represents a tri- or more valent group formed by removing all carboxyl groups from a tri- or more basic aromatic polycarboxylic acid; the aromatic ring of Y is constituted from carbon atoms, wherein a substituent, may be attached to any of the carbon atoms, and at least one of the carbon atoms has thereon no substituents attached thereto; each substituent on the aromatic ring of Y, when present, is independently an alkyl group, a vinyl group, an allyl group, an amino group, or a halogen atom; a represents an integer of 1 or greater, b represents an integer of 0 or greater, and 3≦a+b≦d−1 is satisfied, where d represents the number of hydrogen atoms bound to the carbon atoms constituting the aromatic ring in the event that all substituents including the carboxyl groups of the aromatic polycarboxylic acid have been substituted with hydrogen atoms, that is, the number of the sites that can be substituted on the aromatic ring.