A kind of emulsified paraffin and its preparation method and application

Abstract

The invention discloses an emulsified paraffin wax and its preparation method and application. It consists of paraffin wax, water for emulsification and a composite emulsifier; in the emulsified paraffin wax, the mass fraction of the composite emulsifier is 3-5%; the composite emulsifier, In terms of parts by weight, it includes the following components: Span-80: 90-100 parts; Tween-80: 40-50 parts; Pinpinga: 10-20 parts; OP-10: 30-40 parts; Ethanolamine: 10-20 parts; Stearic acid: 5-10 parts; Ethylene glycol, 37-48 parts. The emulsified paraffin wax provided by the invention has the characteristics of good emulsion dispersion, high stability, long shelf life, strong water solubility, and good film-forming performance. It is mixed into concrete as an additive, has good compatibility with concrete, and has a certain At the same time, it can also enhance the hydrophobicity of concrete, improve the durability properties such as impermeability and electric flux; in addition, it can also weaken the electrical conductivity of concrete and greatly increase its resistivity, which is used to prepare high-impedance concrete.

Description

technical field [0001] The invention discloses an emulsified paraffin, its preparation method and application, and belongs to the technical field of emulsified paraffin related chemical industry. Background technique [0002] In actual engineering, changes in the external environment will lead to a large loss of water in freshly mixed concrete. People usually use watering, watering, water storage and other methods to maintain concrete, but this measure requires a lot of water resources and causes a certain degree of waste. , and will increase construction costs. Using the film-forming properties of emulsified paraffin to keep the water in the newly poured concrete from evaporating instead of the traditional water supply and maintenance measures can not only achieve the purpose of water saving, but also simplify the maintenance process and achieve good economic benefits. In addition, with the increasing complexity of engineering, higher performance requirements are put forwa...

AI Technical Summary

Problems solved by technology

At this stage, there are endless researches on the preparation of emulsified paraffin. Regarding the choice of emulsifier, most of them use a single emulsifier or a compound emulsifier prepared by two or three surfactants. Most of these emulsifiers can also produce emulsified paraffin solutions. , but among the many properties of emulsified paraffin (centrifugal stability, static stability, dispersibility, particle size and distribution, film-forming properties, etc.), there will always be one or more defects

For example, the composite emulsifier composed of Span-80 and Tween-80 has the best stability when the HLB value ranges from 9.8 to 10.0, but when the centrifugal speed is 12000r / min, stratification occurs

However, using Span-80 and AEO-9 as the compound emulsifier to prepare paraffin wax emulsion, with the increase of the mass ratio of emulsifier to paraffin wax, the concentration of the stable paraffin wax emulsion that can be prepared can be gradually increased, but the increase is not large, and all paraffin wax The overall stability of the emulsion is not very good

[0004] More importantly, when these emulsified paraffins are mixed into concrete, there will be problems of concrete incompatibility and affecting the hydration of concrete. The main manifestations are: freshly mixed concrete will have emulsified paraffin during the vibration process and before hardening The phenomenon of floating occurs; the addition of emulsified paraffin will slow down the hydration process of concrete, and the retardation phenomenon is serious

Images