Waterborne polyurethane finishing agent for PVC (Polyvinyl Chloride) protective gloves and preparation method thereof

Abstract

The invention relates to a waterborne polyurethane finishing agent for PVC (Polyvinyl Chloride) protective gloves and a preparation method thereof, in particular to a waterborne polyurethane finishing agent for protective gloves and a preparation method thereof, belonging to polyurethane coating combinations. The waterborne polyurethane finishing agent is characterized in that firstly, mixed polyether glycol and aliphatic diisocyanate are used as raw materials to synthesize isocyanate-terminated perpolymer, wherein the mole ratio of a isocyanato group and a hydroxyl group is NCO:OH=2.0-3.2; secondly, dimethylopropionic acid DMPA is used as a hydrophilic chain extender, and the dosage of the DMPA is 3-6 percent of the weight of the perpolymer; thirdly, triethylamine is used as a branched chain extender, and the dosage of the triethylamine is 1-4 percent of the weight of the perpolymer; fourthly, a coupling agent is added in emulsion with the addition quantity of 2-5 percent of the weight of the perpolymer; and fifthly, the solid content of the emulsion is 25-30 percent. The invention provides the waterborne polyurethane finishing agent for the PVCprotective gloves, which has the advantages of favorable storage stability, strong adhesive force, strong elasticity, strong drawing force, long service life, comfortable wearing and free removal. and the preparation method thereof.

Description

technical field [0001] The invention relates to a water-based polyurethane coating agent for PVC protective gloves and a preparation method thereof, which belongs to polyurethane coating compositions, in particular to a water-based polyether polyurethane emulsion coating agent for protective gloves and its preparation. Background technique [0002] Natural rubber protective gloves have the characteristics of good elasticity and high strength, so they have been used for many years. However, due to the shortage of natural rubber resources, the continuous rise in prices, and the protein structure contained in the molecular structure of natural rubber, there are disadvantages that cause human skin allergic reactions and even infections. PVC plastic material has the characteristics of chemical corrosion resistance, high strength, good processing performance and low price. Therefore, in recent years, PVC protective gloves have been used as a substitute for natural rubber protectiv...

AI Technical Summary

Problems solved by technology

[0005] 1. Using solvent-based polyurethane finishing agent, the solvent volatilizes, wastes resources and pollutes the environment

[0006] 2. Commercially available polyurethane emulsion coating agents have poor storage stability and are prone to yellowing. Moreover, the adhesion of the coating is not good, it is easy to warp and fall off naturally, and the service life is short

[0007] 3. The smoothness of the gloves does not meet the requirements of taking off and wearing them freely

[0008] 4. The manufacturing process is complex and the production cost is high