Defoaming agent

Abstract

The invention discloses a defoaming agent. The defoaming agent comprises the following components in parts by weight: 5-10 parts of fatty alcohol, 3-10 parts of polydimethylsiloxane, 5-10 parts of potassium iodide, 10-15 parts of boric acid, 6-9 parts of calcium stearate, 10-20 parts of 3-methyl-2-buten-1-ol, 3-10 parts of tert-amyl chloride, 5-10 parts of dimethyl silicon oil, 3-9 parts of mineral oil, 1-15 parts of polyether, 3-10 parts of fatty acid and 5-20 parts of ethylene glycol. The defoaming agent disclosed by the invention has the advantages of high defoaming speed, good inhibition performance and no influence on basic nature of a foaming system, as well as good diffusibility and permeability, stable chemical nature, no corrosion, no toxicity, no adverse side effects and high safety.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a defoamer. Background technique [0002] Foam is a thermodynamically unstable system, which cannot be stable. The thermodynamic instability of foam is due to the fact that the total surface area of ​​the liquid in the system is greatly reduced after the foam is broken, so that the energy (free energy) of the system is greatly reduced. [0003] Defoamer, also known as antifoaming agent, will produce many harmful foams in the process of industrial production, and it is necessary to add a defoamer. It is widely used to remove harmful foam produced in the production process of latex, textile sizing, food fermentation, biomedicine, paint, petrochemical, papermaking, industrial cleaning and other industries. There are many types of defoamers, such as organosiloxane, polyether, silicon and ether graft, amine, imine and amide, some will affect the basic properties of the fo...

AI Technical Summary

Problems solved by technology

There are many types of defoamers, such as organosiloxane, polyether, silicon and ether graft, amine, imine and amide, some will affect the basic properties of the foaming system, and some have poor defoaming effect , Inhibition performance is not good, some diffusion is not good enough, and some chemical properties are not stable, and the safety performance is not high