Double-component polyurethane

Abstract

The invention discloses double-component polyurethane, which comprises a component A and a component B. The component A comprises the following raw materials: soybean oil polyester polyol, soybean oilpolyester polyol, a coated aluminum sheet pigment, diisopropylnaphthalene, a dispersant BYKP104, zeolite powder, silica powder and a catalyst. The component B comprises 50% of polymethylene polyphenyl isocyanate (PAPI) (NCO = 32% and th functionality is 2.7) and 50% of a modified MDI prepolymer (NCO = 23% and the functionality is 2). Polyhydric alcohol resin taking soybean oil derivatives as maincomponents is adopted as a hydroxyl component, and the soybean oil is wide and rich in source, and belongs to an all-natural renewable resource, so that the is green and environment-friendly, and double-component polyurethane is not easily influenced by a single supplier to generate great fluctuation. The timeliness of supply and the stability of cost price can be effectively guaranteed. The soybean oil polyol mainly containing polyester is adopted, so that the tensile strength of the cured product is greatly improved compared with the common grease polyol resin mainly containing polyether.

Description

technical field [0001] The invention relates to the technical field of preparation of adhesives, in particular to a two-component polyurethane. Background technique [0002] With the development of the economy and the progress of the society, people put forward new ideas in terms of traffic warning, visual safety guidance, and beautiful road surface in addition to the daily road performance of the main roads of the city and other motor vehicle lanes, non-motor vehicle lanes, and sidewalks. requirements. Currently common black asphalt pavement and gray cement concrete pavement, these two pavements can no longer fully meet the above growing new demands for pavement. Colored pavement can be used to enhance road safety, warn passing vehicles, standardize road categories, facilitate operation management, and maintain traffic safety by laying a layer of colored pavement on the existing road surface. At the same time, it can also be used in areas such as sports venues, pedestrian...

AI Technical Summary

Problems solved by technology

[0006] Among them, although the two-component polymethyl methacrylate (PMMA) binder has good weather resistance and mechanical strength, the material has a pungent odor (from acrylic acid monomer and reactive diluent crosslinking agent), and belongs to Flammable and explosive dangerous chemicals have high requirements for storage and transportation, and the price is relatively expensive; in addition, because the curing process is free radical polymerization, the amount of initiator added has a great impact on the pot life after batching. If the curing is too fast during the operation, the wetting time of the substrate and aggregate is not enough, and it is easy to cause adhesion defects

[0007] The two-component solvent-free epoxy resin adhesive has good adhesion and mechanical strength, but due to its poor elasticity retention rate at low temperature, it will cause cracking when the road surface is used, especially when it is paved on a low-strength road. Residential asphalt base