Polyurethane composition

• Main Authors: GOU PENGFEI, ZHOU BAINENG, PENG HAO, ZHONG LIANBING, FU LUOPING, XIAO YI, WANG ENDONG, XIONG GAOHU
• Format: Patent
• Language: Chinese; English
• Published: 17.05.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to a polyurethane composition, and belongs to the technical field of polyurethane composite materials. The technical problem to be solved by the invention is to provide the polyurethane composition with small curing shrinkage and good mechanical properties. The polyurethane composition comprises the following components: a, a black material component which comprises polyisocyanate and an initiator; b, a white material component, wherein the white material component comprises polyol and an acrylate monomer; the polyol comprises spirocyclic alcohol with a structure as shown in a formula I in the specification. The spirocyclic alcohol is adopted, so that the volume shrinkage of polyurethane resin during curing is overcome, the curing mechanical strength of the resin is improved, and the problems that an existing resin system is large in curing shrinkage, products are prone to deformation, aging is accelerated, many defects exist, and the mechanical property is insufficient are solved. Polyu