| abstract |
The invention provides ultraviolet radiation resistant polyurethane sponge and a preparation method thereof, wherein the ultraviolet radiation resistant polyurethane sponge comprises the following components in parts by weight: 100 parts of polyether polyol, 2-15 parts of tetrabutyl titanate, 0.1-10 parts of tributyl citrate, 4-9 parts of water, 0.05-0.2 part of amine catalyst, 0.1-0.4 part of organic tin catalyst, 1.0-3.0 parts of foam stabilizer, 8-20 parts of dichloromethane and 50-65 parts of TDI. The low-density polyurethane sponge prepared by the invention has better pore distribution, and the sponge height is not influenced; no release agent is needed, and the cured product can completely fall off from the die and has better ultraviolet resistance. |