Preparation method of protective paint for expressway guardrail

Abstract

The invention discloses a preparation method of a protective paint for an expressway guardrail. The protective paint is prepared from the following constituents in parts by weight: 100-110 parts of polyvinyl acetate, 60-70 parts of polyvinyl alcohol methyl ester, 40-50 parts of polyvinyl alcohol, 11-13 parts of 2- chloro ethanesulfonic acid, 5-8 parts of dimethyl phthalate, 6-8 parts of methyl alcohol, 20-30 parts of titanium dioxide, 12-14 parts of purified bentonite, 3-5 parts of BYK306 and 60-70 parts of water. The preparation method comprises the following steps: adding the polyvinyl acetate, the polyvinyl alcohol methyl ester and the polyvinyl alcohol into a reaction kettle with water, heating up and starting to stir, regulating revolving speed to 100-200r/min, dropping the 2-chloro ethanesulfonic acid at 100-120 DEG C, and reacting for 60-90 minutes at the same temperature; adding the methyl alcohol into the reaction kettle, reacting at 130-160 DEG C for 120-150 minutes; and then, adding the BYK360, the titanium dioxide and the purified bentonite and stirring well, cooling to room temperature, gradually adding the dimethyl phthalate while stirring, stirring well, and thus obtaining the protective paint.

Description

technical field [0001] The invention relates to the technical field of traffic facilities, in particular to a method for preparing a protective paint for expressway guardrails. Background technique [0002] With the vigorous development of road traffic, the demand for highway guardrails as a basic traffic facility is increasing day by day. Highway guardrails are usually made of metal square or flat columns and corrugated guards. Because it has been used in various climates and environments such as wind, frost, rain, snow, salt spray, and sunshine for many years, anti-corrosion has become an important means to prolong its service life. Chinese patent 91208803 uses galvanizing or plastic dipping, but Weak adhesion, poor resistance to acid, alkali, and salt spray; the Chinese patent application number 200420038267 advocates the use of metal materials with anti-rust enamel layers as protective fences; Material (ZL03242945) and other methods to achieve the purpose of corrosion r...

AI Technical Summary

Problems solved by technology

Although it is said to have high strength, abrasion resistance, and sandpaper grinding is not easy to fall off, it is far from enough to be used under the climatic conditions of the highway, and the production cost is high. Although the performance of imported products meets the requirements, the market price is high. , the transportation cycle is long, it is difficult to be accepted by the majority of users, and the market is limited

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