Basf Se Corporation

Sika Technology Ag

Bang Wei Xi

Kai Chen

Bernhard Feichtenschlager

Shengzhong Zhou

Stefan Hirsemann

Hang Xu

Zhen Peng Liang

YingHao Liu

Xi Tao Liu

Li Xia Wang

Jin Lin Liu

Ben Ben Shen

Zi Song Zhu

He Meng Zhao

The present invention relates to a process of fabricating a multi-layer composite structure by 3D printing, said composite structure comprises at least one cured mortar layer formed by curing of a mortar composition, and at least one polyurethane layer formed by polymerization of a first polyurethane forming composition, wherein said mortar composition and said first polyurethane forming composition are dispensed individually and simultaneously via adjacent printing nozzles. The mortar composition is optionally modified by a second polyurethane forming composition.

One-step formation of an integrated composite structure comprising cured mortar layers and a polyurethane layer by 3D printing

Described herein is a polyurethane foam prepared with certain polytetrahydrofurans and optional polyether polyols. The polyurethane foam is characterized by low hardness increase at low temperature as compared with conventional polyurethane foam, and is suitable for use in products which can be exposed to low temperature such as snow boots.

Composition useful for the preparation of polyurethane foams

Growing community of inventors

Shanghai, China

Bang Wei Xi