2results about How to "Excellent low temperature adhesion" patented technology

The application provides a two-component polyurethane pouring sealant and a preparation method and application thereof. The two-component pouring sealant comprises an A component and a B component. The A component comprises propylene oxide modified lignin polyol and erythritol modified polyether polyol. The B component comprises cashew phenol based polyurethane prepolymer. The propylene oxide modified lignin polyol, the erythritol modified polyether polyol and the cashew phenol based polyurethane prepolymer have a synergistic effect, which can significantly improve the shear strength of the pouring sealant at high temperature, and the pouring sealant has good low-temperature bonding performance, aging resistance and impact resistance. Specifically, the shear strength at 60 DEG C is greater than 13 MPa, the shear strength remains above 12.5 MPa after aging in a double 85 environment, the attenuation rate is less than 7% compared with the shear strength at room temperature, the shear strength can remain above 13 MPa after high-low temperature impact test, the attenuation rate is less than 3%, and the pouring sealant meets the pouring requirements of power batteries in the field of new energy batteries.

The invention relates to the field of powder coatings, in particular to a powder coating capable of improving adhesive force of an adhesive tape and a preparation method of the powder coating. The invention relates to a powder coating for improving the adhesive force of an adhesive tape, which comprises the following components in percentage by weight: 55-80% of polyester resin, 4-6% of curing agent, 0.5-1.2% of flatting agent, 0.5-1.5% of degassing agent, 0.5-3% of high-melting-point solid polyol and the balance of pigment and / or filler, the high-melting-point solid polyhydric alcohol is a polyhydroxy-containing compound with the melting point of 95-200 DEG C. By adding the high-melting-point solid polyol, excellent low-temperature cohesiveness is obtained, and meanwhile, the conventional performance of the coating is not damaged at all.