A kind of compound emulsifier for preparing emulsified paraffin and its preparation method and application

Abstract

The invention discloses a composite emulsifier for preparing emulsified paraffin wax and its preparation method and application, comprising the following components in parts by weight: Span-80: 90-100 parts; Tween-80: 40-50 parts Pingpingjia: 10‑20 parts; OP‑10: 30‑40 parts; Triethanolamine: 10‑20 parts; Stearic acid: 5‑10 parts; Ethylene glycol, 37‑48 parts. The invention has the advantages of less emulsifier consumption and excellent emulsification effect. The emulsified paraffin prepared by the emulsifier prepared by the invention has the characteristics of good emulsion dispersibility, high stability, long shelf life, strong water solubility and good film-forming performance. The prepared emulsified paraffin is used as an additive to mix into concrete, which has good compatibility with concrete and has a certain water-reducing effect; at the same time, it can also enhance the water repellency of concrete, improve the durability of impermeability and electric flux, etc. The performance is improved; in addition, it can also weaken the conductivity of concrete and greatly increase its resistivity, which is used to prepare high-impedance concrete.

Description

technical field [0001] The invention discloses a compound emulsifier for preparing emulsified paraffin, its preparation method and application, and belongs to the technical field of emulsified paraffin related chemical industry. Background technique [0002] Emulsified wax is a kind of uniform fluid containing wax and water made under the action of external mechanical force by dispersing various waxes including petroleum wax evenly in water, with the help of directional adsorption of emulsifier. The method of domestic production of emulsified paraffin is relatively simple, and most of them are prepared by using anionic or nonionic surfactants as emulsifiers in an alkaline environment. In the traditional method, the amount of emulsifier is large, the cost is high, and the stability, dispersibility, dilution, particle size distribution and other properties of the emulsified paraffin wax can not be obtained at the same time, and there are obvious defects in one or more properti...

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Problems solved by technology

[0004] 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

[0005] More importantly, when the emulsified paraffin prepared by the existing compound emulsifier is mixed into the concrete, there will be problems of concrete incompatibility and affecting the hydration of the concrete. The main performance is: the fresh concrete is vibrated During the process and before hardening, there will be emulsified paraffin floating phenomenon; the addition of emulsified paraffin will slow down the hydration process of concrete, and the slow setting phenomenon is serious

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