Polyurethane pouring sealant for wind driven generator rotor coating protection and preparation method thereof

Abstract

The invention discloses a polyurethane pouring sealant for wind driven generator rotor coating protection. The polyurethane pouring sealant comprises a component A and a component B, wherein the component A comprises resin, filler and auxiliary agents, the component B is a curing agent, and the mass ratio of the component A to the component B is 100:30 when the component A and the component B are mixed. A preparation method of the polyurethane pouring sealant for wind driven generator rotor coating protection comprises the following steps: preparation of the component A: taking 45-55 parts of polyol, 0.5-2 parts of a surfactant, 0.1-1 part of a wetting dispersant, 0.1-1 part of a leveling agent, 0.1-1 part of an adhesion promoter and 0.1-1 part of an antifoaming agent, and fully stirring and uniformly mixing; then adding 30-40 parts of calcium carbonate powder, 1-5 parts of titanium dioxide and 5-10 parts of a dewatering agent, and fully dispersing by using a high-speed dispersion machine; and after uniformly dispersing, stirring in vacuum to obtain the component A; and preparation of the component B: taking 97-99 parts of MDI-50 and 1-3 parts of a drying dewatering agent, and performing vacuum stirring to obtain the component B.

Description

technical field [0001] The invention belongs to the field of two-component polyurethane adhesives, and in particular relates to a polyurethane potting adhesive used for wind-driven generator rotor coating protection and a preparation method thereof. Background technique [0002] Traditional two-component polyurethane potting adhesives have relatively poor mechanical properties, relatively low hardness, tensile strength, impact strength, tensile shear strength, and relatively large volume shrinkage at room temperature; and when used at room temperature The pot life is short and cannot fully meet the requirements of the operation time required for potting. Moreover, bubbles and pores are likely to appear in the cured adhesive layer of the existing potting compound; in addition, the existing potting compound has low waterproof performance and is easily eroded by moisture when used in offshore wind power. Traditional two-component polyurethane potting adhesives contain volatile...

AI Technical Summary

Problems solved by technology

[0002] Traditional two-component polyurethane potting adhesives have relatively poor mechanical properties, relatively low hardness, tensile strength, impact strength, tensile shear strength, and relatively large volume shrinkage at room temperature; and when used at room temperature The pot life is short and cannot fully meet the requirements of the operation time required for potting

Moreover, the existing potting adhesives are prone to air bubbles and pores after curing; in addition, the existing potting adhesives have low waterproof performance and are easily eroded by moisture when used in offshore wind power.

Traditional two-component polyurethane potting adhesives contain volatile organic solvents, which pose potential physical threats and environmental pollution during use