Ultrahigh-density high-strength polyurethane spray-coating material, and preparation method and application thereof

Abstract

The invention belongs to the technical field of polyurethane, and in particular relates to an ultrahigh-density high-strength polyurethane spray-coating material, and a preparation method and application thereof. The material consists of a component A and a component B, wherein the component A comprises the following components in percentage by mass: 22 to 34 percent of polyether polyol A, 10 to 22 percent of polyether polyol B, 0 to 18 percent of polyether polyol C, 5 to 15 percent of polyether polyol D, 5 to 12 percent of a crosslinking agent, 2 to 2.5 percent of an antioxidant, 1 to 1.5 percent of a foam stabilizer, 0.02 to 0.2 percent of a chemical foaming agent, 2 to 4 percent of a catalyst, 1.5 to 2.5 percent of a physical foaming agent and 19 to 25 percent of a viscosity reducer; and the component B is polymethylene polyphenyl isocyanate. The material provided by the invention has the characteristics that construction tolerance is high, and the prepared foam plastic has high density, high compression strength, high viscosity with a base material, high surface hardness and the like, and can be widely applied to heat-preserving protection engineering needing to tolerate external pressure.

Description

technical field [0001] The invention belongs to the technical field of polyurethane, and in particular relates to an ultra-high-density and high-strength polyurethane spraying material and a preparation method and application thereof. Background technique [0002] Polyurethane foam is currently the best of all thermal insulation materials, widely used in heating pipelines, petrochemical pipelines, transportation, refrigerator freezers, building insulation, aviation and military, and many other aspects. Polyurethane spraying construction technology has been widely used in the field of building insulation in recent years due to its on-site forming, fast construction speed, good adhesion to the substrate, fine cells and low thermal conductivity. Conventional combined polyether for thermal insulation spraying, the general density is set at 8-40kg / m 3 Within the range, the product mainly plays the role of heat preservation. With the increase of foam density, the viscosity of the...

AI Technical Summary

Problems solved by technology

At present, some manufacturers in the industry are using polyurea spraying as a waterproof and protective measure, but because polyurea products do not foam, the thermal insulation performance is poor and the cost is high, the actual use effect is not ideal

[0003] Therefore, there is an urgent need to develop a high-density spraying material for thermal insulation and protection of the substrate, to solve the problems of difficult mixing and low construction tolerance caused by viscosity problems in the case of high-density spraying materials

Images