Surface treatment of mirror finish
The present invention develops a method of treating metallic or plastic substrates to form mirror finish. After several pre-treatment steps to modify the surface situation of the substrate, whether for metallic or plastic material, to enhance the adhesion of above coating layers, a layer of mirror finish will be applied, with the function of decoration shown with metal appearance and glossy. A changeable topcoat will be coated to protect below mirror finish layer and achieve colorful decoration. All materials and processing steps are environmentally friendly, and involved without expensive facilities.
1. A method for pretreating a substrate for forming a mirror finish, comprising:
putting a first material on the substrate, wherein the first material comprises a first epoxy resin, a first leveling agent, butanol, acetone, diacetone alcohol, a first curing agent and 2,4,6 Tris(dimethylaminomethyl)phenol;
curing the first material;
putting a second material on the cured first material, wherein the second material comprises a second epoxy resin, a second leveling agent, glycidyl 2-methylphenyl ether, diacetone alcohol, butanol, a second curing agent and 2,4,6 Tris(dimethylaminomethyl)phenol;
curing the second material; and
coating a mirror finish on the cured second material.
2. The method of claim 1 , further comprising: treating the cured second material by a solution mixture of tin (II) chloride and hydrochloric acid.
3. The method of claim 1 , wherein the step of putting the first material on the substrate is performed by dipping or spraying.
4. The method of claim 1 , wherein the step of putting the second material on the substrate is performed by dipping or spraying.
5. The method of claim 1 , wherein the step of curing the first coating material is performed at a temperature range of 80 to 150° C.
6. The method of claim 1 , wherein the step of curing the second coating material is performed at a temperature range of 80 to 150° C.
7. The method of claim 1 , further comprising:
post-treating the mirror finish by putting a post-treatment material on the mirror finish, wherein the post-treatment material comprises methyltriethoxysilane, γ-mercaptopropyltrimethoxysilane, ethanol, acetic acid, acetone, DI Water, colloidal silica and diacetone alcohol; and
curing the post-treatment material.
8. The method of claim 1 , further comprising:
rinsing the cured second material by a mixed solvent.
9. The method of claim 8 , wherein the mixed solvent comprises acetone and ethanol at a volume ratio of 1 to 1.
10. The method of claim 1 , wherein the substrate is a metallic substrate or a plastic substrate.
11. The method of claim 10 , further comprising:
pretreating the metallic substrate by an initial treatment before the step of putting the first material on the substrate.
12. The method of claim 11 , wherein the initial treatment comprise:
polishing the metallic substrate; and
cleaning the metallic substrate with water and a cleanser essence.
13. The method of claim 10 , further comprising:
pretreating the plastic substrate by an initial treatment before the step of putting the first material on the substrate.
14. The method of claim 13 , wherein the initial treatment is a plasma treatment, a chemical treatment, or a physical treatment.
15. A mirror finish formed on a substrate fabricated by the method of claim 1 .