Mirror back paint resin and spraying paint

Abstract

The invention relates to mirror back paint resin and curtain flow coating. Its features are that the resin solid component includes 50-70% medium oil length alkyd resin, 20-40% multi-hydroxy acrylic acid resin, and 10-20% polyurethane resin; middle resin is formed by medium oil length alkyd resin, acrylamide, ethoxyl methacrylate, and butyl methacrylate monomer; the mirror back paint resin is formed by the middle resin and toluene diisocynate. Its viscosity is 100-300s; acid value is under 5mgKOH / g. The coating is formed by the resin, proper cross-linking resin, pigment, extender pigment, auxiliary agent, and solvent has low curing temperature, high-speed, high hardness of paint film, good flexibility, adhesive force, and chemical resistance. It can be applied to our country silver mirror production line to ensure the product quality.

Description

technical field [0001] The invention relates to a resin and a paint thereof, in particular to a mirror back paint resin and a curtain coating for a mirror back metal coating protective paint. Background technique [0002] There are mainly two types of mirrors: aluminum mirrors and silver mirrors. Aluminum mirrors are cheap but poor in performance, while silver mirrors are of good quality and high quality, but are expensive to produce. At present, silver mirrors are mainly used in developed countries. With the development of economy, the silver mirror market in my country is also expanding. The production process of the silver mirror is: first coat a layer of metallic silver on the glass surface as a reflective layer by chemical methods, and then coat a layer of copper on the silver film to increase the reflection effect of the silver film and protect the silver film. Coat the surface of the copper film with a protective coating, i.e. mirror back paint. [0003] High-quali...

AI Technical Summary

Problems solved by technology

Mirror back paint, such as the disclosed "coating of glass" of CN1122127A, adopts alkyd resin, amino resin and organosilicon adhesion promoter, although the coating obtained has improved aspect drying speed and hardness, but flexibility, Adhesion and durability are still not enough

Therefore, after the mirror is used for a period of time, the coating will still fall off, especially at the incision of the mirror, which will reduce the optical performance of the mirror.

On the other hand, the price of silicone is more expensive and the cost of use is higher

[0004] CN1371409A discloses "Quick-drying High Solid Content Coating Based on Modified Alkyd Resin", which is a composition of acrylic modified alkyd resin curing high solid at room temperature, which has good performance, but its coating structure is not dense enough , chemical substances are easy to penetrate, which affects the durability of the mirror back reflection layer

[0005] CN1621430A disclosed "modified dry oil alkyd resin and curtain coating for mirror back metal coating protective coating" needs to be dried at 180°C for 5 minutes, while the drying temperature of the imported silver mirror production line widely used in my country And the time is 130°C-150°C for 3 minutes, therefore, the coating still cannot meet the needs of downstream customers