CN102464878A - Preparation method of elastic polyurethane gel coat for outside of film of wind blade - Google Patents

Abstract

The invention relates to a preparation method of an elastic polyurethane gel coat for the outside of a film of a wind blade. The method mainly comprises the following steps of: firstly, respectively adding resin capable of reacting with -NCO, rutile titanium white powder, inorganic filler, a weather-resistant assistant, an antistaining agent, a nano additive, a dispersing agent, a defoaming agent, a rheological additive, an anti-sedimentation agent and a flatting agent into a stirring tank in sequence, and dispersing and grinding to below 50 micrometers; then adjusting the viscosity by using an environment-friendly organic solvent, and then adjusting the color by using color paste; and finally, mixing two kinds of polyurethane curing agents, and reacting the two polyurethane curing agents with raw materials sufficiently, and diluting by using the environment-friendly organic solvent to 60-90%. The invention has the beneficial effects that the elastic polyurethane gel coat has excellent wind and sand resistance and rain erosion resistance as well as wide application range; and the stretch rate of the polyurethane gel coat can be increased to over 50%, and the elastic polyurethane gel coat has favorable weather resistance and excellent elasticity at low temperature.

Description

A kind of compound method that is used for the outer elastic polyurethane gel coat of film of wind blade

Technical field

The present invention relates to wind blade protective coating and protection gel coat technical field, relate in particular to a kind of compound method that is used for the outer elastic polyurethane gel coat of film of wind blade.

Background technology

Epoxy resin is the organic high molecular compound that contains two or more epoxide groups in the general reference molecule; Its molecular structure is containing active epoxide group in the molecular chain for its characteristic, and epoxide group can be positioned at the end, centre of molecular chain or structure circlewise; Owing to contain active epoxide group in the molecular structure, make them form the insoluble cancellated superpolymer of three-dimensional that has with polytype solidifying agent generation crosslinking reaction.Domestic large scale wind blade suitability for industrialized production is started late, and most of its quality of blade coating can not satisfy the domestic correspondent requirement fully, and its major cause is that the most of wind sand cut of China's wind field is very big, has intensive to impact and friction to the blade protective coating; Traditional protective coating system that adopts is not equipped with the urethane gel coat, and perhaps partial blade manufacturing concern adopts unsaturated polyester gel coat, polyester gel coat or the epoxy gel coat that is provided.Therefore, the defective of existing gel coat existence mainly is presented as: anti-sand cutting and weathering performance extreme difference; Extensibility is low, easy of crack under the low temperature; The weathering resistance extreme difference is easy to xanthochromia and efflorescence; Elasticity is violent with temperature variation, and low temperature is lost elasticity down easily.

Summary of the invention

To above defective, the present invention provides a kind of compound method that has preferable anti-sand cutting, weathering property, weather resistance and prevent the outer elastic polyurethane gel coat of the film that is used for wind blade of cold cracking, makes gel coat still have fabulous elasticity at low temperatures simultaneously.

For realizing above-mentioned purpose, the present invention adopts following technical scheme:

A kind of compound method that is used for the outer elastic polyurethane gel coat of film of wind blade mainly may further comprise the steps:

(1) at first can get 10-60 part, Rutile type Titanium Dioxide and get 0.2～1.5 part of 10-50 part, mineral filler 10-45 part, 0.02～1.5 part of weathering resistance auxiliary agent, 1～8 part of anti-pollution auxiliary agent, 3～10 parts of nanometer additives, 0.2～1.5 part of dispersion agent, skimmer 0.1-0.5 part, auxiliary rheological agents 0.1-1.5 part, anti-settling agent 0.1-1.5 part and flow agent with the resin of-NCO reaction; Add to successively respectively in a mixing bowl, below the dispersion grinding to 50 micron;

(2) adjust viscosity with environmental protection organic solvent 10-25 part then, again with packing behind the color paste toning;

(3) at last polyurethane curing agent 5-40 part of high-weatherability is mixed back normal temperature with polyurethane curing agent 5-60 part of high-flexibility and placed 1-5 hour, make it each other fully reaction, to 60%-90%, pack with the environmental protection organic solvent diluting;

(4) will be mixed with the solidifying agent that is packaged to be by step (3) by the preparation that step (2) are packaged to be, getting 1 with the solidifying agent weight part that is packaged to be by step (3) is standard again, and then weight of formulation part is between the 1-3.

The beneficial effect of the compound method of the outer elastic polyurethane gel coat of the film that is used for wind blade of the present invention is: have the splendid grittiness of anti-wind can, anti-weathering performance and the wide scope of application; Can the extensibility of urethane gel coat be brought up to more than 50%, have and still have splendid elasticity under good weathering resistance and the low temperature.

Embodiment

The described compound method that is used for the outer elastic polyurethane gel coat of film of wind blade of the embodiment of the invention, its step mainly comprises:

(1) at first can get 10-60 part, Rutile type Titanium Dioxide and get 0.2～1.5 part of 10-50 part, mineral filler 10-45 part, 0.02～1.5 part of weathering resistance auxiliary agent, 1～8 part of anti-pollution auxiliary agent, 3～10 parts of nanometer additives, 0.2～1.5 part of dispersion agent, skimmer 0.1-0.5 part, auxiliary rheological agents 0.1-1.5 part, anti-settling agent 0.1-1.5 part and flow agent with the resin of-NCO reaction; Add to successively in a mixing bowl, below the dispersion grinding to 50 micron;

(2) adjust viscosity with environmental protection organic solvent 10-25 part then, again with packing behind the color paste toning;

(3) at last polyurethane curing agent 5-40 part of high-weatherability is mixed back normal temperature with polyurethane curing agent 5-60 part of high-flexibility and placed 1-5 hour, make it each other fully reaction, to 60%-90%, pack with the environmental protection organic solvent diluting;

(4) will be mixed with the solidifying agent that is packaged to be by step (3) by the preparation that step (2) are packaged to be, getting 1 with the solidifying agent weight part that is packaged to be by step (3) is standard again, and then weight of formulation part is between the 1-3.

Claims (1)

1. a compound method that is used for the outer elastic polyurethane gel coat of film of wind blade is characterized in that, mainly may further comprise the steps:

(1) at first can get 10-60 part, Rutile type Titanium Dioxide and get 0.2～1.5 part of 10-50 part, mineral filler 10-45 part, 0.02～1.5 part of weathering resistance auxiliary agent, 1～8 part of anti-pollution auxiliary agent, 3～10 parts of nanometer additives, 0.2～1.5 part of dispersion agent, skimmer 0.1-0.5 part, auxiliary rheological agents 0.1-1.5 part, anti-settling agent 0.1-1.5 part and flow agent with the resin of-NCO reaction; Add to successively respectively in a mixing bowl, below the dispersion grinding to 50 micron;

(2) adjust viscosity with environmental protection organic solvent 10-25 part then, again with packing behind the color paste toning;

(3) at last polyurethane curing agent 5-40 part of high-weatherability is mixed back normal temperature with polyurethane curing agent 5-60 part of high-flexibility and placed 1-5 hour, make it each other fully reaction, to 60%-90%, pack with the environmental protection organic solvent diluting;

(4) will be mixed with the solidifying agent that is packaged to be by step (3) by the preparation that step (2) are packaged to be, getting 1 with the solidifying agent weight part that is packaged to be by step (3) is standard again, and then weight of formulation part is between the 1-3.