Title:
POLYURETHANE RESIN COMPOSITION SUITABLE FOR EXTRUSION MOLDING
Document Type and Number:
WIPO Patent Application WO/2022/181638
Kind Code:
A1
Abstract:
A polyurethane resin composition including 20-99 parts by mass of a thermoplastic polyurethane elastomer (A) and 1-80 parts by mass of multi-layered structure polymer particles (B), the polyurethane resin composition characterized in that the multi-layered structure polymer particles (B) satisfy the following conditions (1)-(6): (1) the multi-layered structure polymer particles (B) comprise two or more layers, having at least one rubber component layer (I) on the inside thereof and having at least one thermoplastic resin component layer (II) on the outermost side thereof; (2) the rubber component layer (I) is a polymer layer formed through copolymerization of a monomer mixture (i) comprising 50-99.99 mass% of acrylic acid ester, 49.99-0 mass% of another monofunctional monomer that is copolymerizable with the acrylic acid ester, and 0.01-10 mass% of a polyfunctional monomer; (3) the thermoplastic resin component layer (II) is a polymer layer formed through polymerization of a monomer (ii) comprising 40-100 mass% of methacrylic acid ester and 60-0 mass% of another monomer that is copolymerizable with the methacrylic acid ester; (4) the number average molecular weight of the outermost layer polymer of the thermoplastic resin component layer (II) is 30,000 or less, using GPC; (5) the total mass ratio [(I)/(II)] of the rubber component layer (I) to the thermoplastic resin component layer (II) is 30/70-90/10; (6) the average particle size of the multi-layered structure polymer particles (B) is 150 nm or less; and the melt viscosity ratio ηr of the melt viscosity η(A) of the thermoplastic polyurethane elastomer (A) at a shear velocity of 121.6 sec-1 to the melt viscosity η of the polyurethane resin composition at a shear velocity of 121.6 sec-1 satisfies the following relationships. Melt viscosity ratio ηr (180°C) at 180°C: η(A)/η>1.0
Melt viscosity ratio ηr (200°C) at 200°C: η(A)/η≤1.0
Inventors:
NOMOTO YUSAKU (JP)
ZHOU YANTAO (JP)
ZHOU YANTAO (JP)
Application Number:
PCT/JP2022/007387
Publication Date:
September 01, 2022
Filing Date:
February 22, 2022
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
C08F265/06; C08L51/04; C08L75/04
Foreign References:
| JP2005255872A | 2005-09-22 | |||
| JP2000053841A | 2000-02-22 | |||
| JP2003335937A | 2003-11-28 | |||
| JP2004238590A | 2004-08-26 | |||
| JP2004330422A | 2004-11-25 |
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
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