Acrylic graft-modified high hydroxyl value dry oil short oil alkyd resin and preparation method thereof

Abstract

The invention relates to a high-hydroxyl-value dry short-oil alkyd resin grafted and modified by acrylic acid, and a preparation method thereof. The compositions and weight percentages of the resin are as follows: 28 percent to 33 percent of dry oil, 26 percent to 35 percent of polyatomic alcohol, 26 percent to 43 percent of polyprotic acid, 13 percent to 20 percent of acrylic monomers, 1.2 percent to 2 percent of initiators and trace catalysts. The short-oil alkyd resin prepared by the preparation method can react with a cross-linked resin to form a mesh spatial structure with large cross linking degree so that coating structures are quite compact and not easy to be penetrated by chemical substances. The short-oil alkyd resin has fast curing performance under low temperature and high corrosion prevention performance, and the assembly line work thereof can be realized, thus being helpful to promoting the manufacturing technology levels of protective coating at the back of eyeglasses in China, breaking the monopoly of products of large foreign companies and reducing the production cost and operating cost of the eyeglass manufacturing industry in China.

Description

technical field [0001] The invention belongs to the field of resins, in particular to an acrylic acid graft modified high hydroxyl value dry oil short oil alkyd resin and a preparation method thereof. Background technique [0002] There are many ways to produce mirrors, and two are the most widely used: the first is to use vacuum aluminum plating, depositing a layer of aluminum on the glass surface as a reflective layer; the second is to chemically coat a glass surface with aluminum A layer of metallic silver is used as the reflective layer, and then a copper layer is plated on the silver film by chemical methods to increase the reflection effect and protective effect of the silver film. Since the metal layer of the mirror is easily eroded by the atmosphere, and the use environment is mostly in places with high temperature, large temperature difference and strong corrosion, the metal layer is easily corroded and tarnished or even peeled off, resulting in loss of optical perf...

AI Technical Summary

Problems solved by technology

CN1371409A discloses "the quick-drying type high solid content coating based on modified alkyd resin", is a kind of acrylic acid modified alkyd resin normal temperature curing high solid composition, though has good performance, but due to coating structure Not dense enough, chemicals are easy to penetrate, which affects the durability of the mirror back reflection layer

CN1621430A discloses "modified dry oil alkyd resin and its curtain coating for mirror back metal coating protective coating", which needs to be dried at 180°C and 5 minutes, while the imported silver mirror production line used in large quantities in my country is dried The temperature is 130-150°C for 3 minutes, so the coating still does not meet the requirements