Title:
多層管
Document Type and Number:
Japanese Patent JP7372856
Kind Code:
B2
Abstract:
To provide a multilayer pipe that is excellent in adhesion between an inner layer and an outer layer, and is excellent in weather resistance and impact resistance.SOLUTION: A multilayer pipe 11 includes an inner layer 1 containing a vinyl chloride-based resin and an outer layer 2 containing an acrylic urethane resin, in which the acrylic urethane resin is a reactant of an acrylic polyol compound and an isocyanate compound, the isocyanate compound contains an isocyanate compound that is a trimer, when a sample obtained by subjecting the outer layer to cresol treatment is measured by gel permeation chromatography, a ratio of a peak area derived from an isocyanate compound appearing as a molecular weight of 2,000 or more and 7,000 or less in 100% of a peak area derived from the isocyanate compound is 10% or more and 90% or less.SELECTED DRAWING: Figure 1
Inventors:
Shoji Mishima
Homayuki Konami
Hironobu Nakamura
Homayuki Konami
Hironobu Nakamura
Application Number:
JP2020035135A
Publication Date:
November 01, 2023
Filing Date:
March 02, 2020
Export Citation:
Assignee:
Sekisui Chemical Co.,Ltd.
International Classes:
B32B1/08; B32B27/20; B32B27/30; B32B27/40; C08G18/62; C08G18/79; F16L11/04
Domestic Patent References:
| JP5026379A | ||||
| JP2019095049A | ||||
| JP2002254576A | ||||
| JP5008166U | ||||
| JP5170260A |
Foreign References:
| WO2017043646A1 |
Attorney, Agent or Firm:
Patent Attorney Osaka Front Patent Office