Patent number: 12534629
Abstract: The present invention provides a spray-applied polyurethane insulation material for tunnels in cold regions, its application, and its construction method. The spray-applied polyurethane insulation material for tunnels in cold regions is composed of raw materials with a mass ratio of 0.8-1.2 of material A and material B. By mass parts, material A includes 90-100 parts of polyether polyol, 90-100 parts of polyester polyol, 5-10 parts of chain extender, 1-4 parts of catalyst, 10-20 parts of flame retardant, 0.5-3 parts of water, and 1-3 parts of surfactant. The B component is diphenylmethane diisocyanate. The flame retardant is composed of flame retardant A and flame retardant B in a mass ratio of 10:1-2.5. The spray-applied polyurethane insulation material of the present invention is used to construct tunnel structures in cold regions, providing good flame retardant and insulation effects.
Type:
Grant
Filed:
March 5, 2024
Date of Patent:
January 27, 2026
Assignees:
CHINA ACADEMY OF RAILWAY SCIENCES
CORPORATION LIMITED, RAILWAY ENGINEERING RESEARCH INSTITUTE, CHINA ACADEMY OF RAILWAY SCIENCES CORPORATION LIMITED
Inventors:
Xiaoxiong Guo, Weibin Ma, Quanxiao Dong, Zefu Zheng, Peng Qiu, Tianyuan Xu, Chi Luo, Cheng Qiu, Peng Zhao, Yao Li, Zheli An, Xingxu Bao, Simeng Yan, Xueliang Cui, Xuehuan Hu, Yitong Shen, Tiantian Song, Weihua Zhang, Kuan Liu