Fast-speed lakh bleaching and antichlorating method

Abstract

A fast bleaching and antichloration method with shellac is carried out by mixing shellac with soda and water, heating to 75í½95íÒC, dissolving into shellac alkaline solution with concentration<25%, filtering, keeping temperature between 75í½95íÒC, agitating for shellac alkaline solution by 50-90r / min speed, adding into chlorine-contained bleaching agent with chlorine content 15í½22wt%, agitating for 30-40mins to obtain bleaching glue, raising temperature to 85í½95íÒC, and agitating 3í½8mins by 50-90r / min speed to obtain dechloridized glue. Its advantages include long storage period, better product quality and shorter bleaching time.

Description

technical field

[0001] The invention relates to a bleaching and dechlorination method, in particular to a rapid bleaching and dechlorination method for shellac, which belongs to the technical field of chemical product processing and treatment. Background technique

[0002] Shellac is a resin with strong adhesive force. Shellac resin is a polyester resin derived from hydroxy acids with a molecular weight of 300-3000. It is mainly composed of pavlocarpic acid and chitosan acid, and also contains substances such as wax and pigment. In addition to adhesion, shellac resin also has good electrical insulation performance, waterproof performance, moisture-proof and rust-proof performance, anti-ultraviolet performance, oil resistance and acid resistance, and is non-toxic and irritating to the human body, and has strong plasticity and solidity. Good color performance, etc., so it is widely used in agriculture, light industry, heavy industry production, and people's daily necessities ...