In modern automobile manufacturing processes, automotive coatings are like the "outerwear" of cars, which not only give cars a beautiful appearance, but also provide important protection for cars. Among them, topcoat and midcoat are key links in the automotive coating system, and the quality of their performance directly affects the overall quality of the car. Automotive coating additives and resins play a vital role in these two coatings.

Topcoat, that is, the topcoat layer, is the outermost coating of the car, which directly determines the appearance of the car. It needs to have high gloss, good weather resistance, chemical corrosion resistance and other characteristics. The midcoat is located between the primer and the topcoat, plays a connecting and filling role, and requires good adhesion, flatness and mechanical strength. In order to achieve these performance requirements, the selection and application of additives and resins are crucial.

Different types of additives can adjust the various properties of topcoat and midcoat, such as leveling, drying speed, hardness, etc. Resins provide the main film-forming substances for these two coatings and determine the basic properties of the coatings. In this article, we will list the automotive coating additives and resins for topcoat and midcoat.
 

	Dispersants	Defoaming agent	Leveling agent	Anti-sagging agent
oil-based paint for topcoat	CFC-510 / CFC-511 / CFC-580 / CFC-6100 / CFC-6140	Depol CFC-151 / Depol CFC-192 / Depol-193 / Depol CFC-166H	Letch CFC-89 / Slip CFC-731 / Slip CFC-706	CIMA-1400 / CIMA-1440 / CIMA 300-20
water-based paint for topcoat	CFC-510 / CFC-511 / CFC-580 / CFC-770 / CFC-6100	Depol CFC-151 / Depol CFC-192	Slip CFC-720 / Slip CFC-731	CIMA-1400 / CIMA-1440 / CIMA 300-20
water-based paint for midcoat	CFC-690H / CFC-695 / CFC-580	Depol CFC-121W / Depol CFC-128W	Letch CFC-344W / Letch CFC-350W	CIMA-1420 / CIMA-1420D

And the following products can be used to improve the orientation of oily midcoat metallic pigments: CIMA-1200 synthetic wax copolymer / CIMA-1250 special nitrogen compound / CIMA-1300 synthetic wax copolymer / CIMA-1310 synthetic wax copolymer / CIMA-1350 EVA polymer wax. (-Plastic paint, -Alkyd, acrylic melamine paint and general industrial paint, -Acrylic, acrylic polyurethane paint) (-Plastic paint, -Solvent-based midcoat and metallic paint topcoat, -Automotive paint and repair paint)

We believe that with the joint efforts of all parties, additives and resins for automotive coatings for topcoats and midcoats will continue to innovate and develop, adding new impetus to the vigorous development of the automotive industry.