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Method for testing the mechanical stability of emulsions

A mechanical stability and mechanical stability technology, applied in the field of performance, can solve the problems of not clearly specifying the specification of the mixer blade and its specification ratio, and not considering strong shear force and heat.

Active Publication Date: 2016-06-22
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This test method does not clearly point out the specifications of mixer blades, mixing tanks and their specification ratios; nor does it consider that the emulsion will be subjected to strong shear force and heat generated by powder or sand grinding after it has been formulated into a coating

Method used

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Experimental program
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Effect test

specific Embodiment approach

[0017] The specific embodiment of the present invention provides a kind of method that detects the performances such as the mechanical stability of emulsion, and it comprises the following steps carried out in order:

[0018] ①Put the emulsion to be tested in the dispersion tank first;

[0019] ② Then turn on the disperser, adjust the speed to 700-900r / min, add the dispersant, wetting agent, defoamer and heavy calcium to the dispersing tank in turn at this speed, increase the speed of the disperser to 2000-2500r / min, Disperse for 10-20min;

[0020] ③ After that, add film-forming aids and continue to disperse for 10-15 minutes;

[0021] ④ Observe the system obtained by dispersion. If the system does not gel, it means that the emulsion to be tested has good mechanical stability, calcium ion stability and heat resistance; if the system gels, it means that the emulsion to be tested has mechanical stability, calcium ion Poor ion stability and heat resistance;

[0022] In the abo...

Embodiment 1

[0030] Get two known emulsions A and B, A emulsion is the emulsion of mechanical stability, poor calcium ion stability, and B emulsion is the good emulsion of mechanical stability, calcium ion stability; Detect by following method of the present invention respectively;

[0031] Include the following steps in order:

[0032] ①Put 190 parts of the emulsion to be tested in the dispersion tank;

[0033] ② Then turn on the disperser and adjust the speed to 700r / min. At this speed, add 5.0 parts of dispersant, 1 part of wetting agent, 1.5 parts of defoamer and 400 parts of heavy calcium to the dispersion tank in sequence, and increase the speed of the disperser to 2000r / min, disperse for 20min;

[0034] ③ Then add 15 parts of film-forming aids and continue to disperse for 15 minutes;

[0035] ④ Observe the system obtained by dispersion. If the system does not gel, it means that the emulsion to be tested has good mechanical stability, calcium ion stability and heat resistance; if t...

Embodiment 2

[0038] Get two known emulsions A and B, A emulsion is the emulsion of mechanical stability, poor calcium ion stability, and B emulsion is the good emulsion of mechanical stability, calcium ion stability; Detect by following method of the present invention respectively;

[0039] Include the following steps in order:

[0040] ①Put 200 parts of the emulsion to be tested in the dispersion tank;

[0041] ② Then turn on the disperser and adjust the speed to 800r / min. At this speed, add 5.5 parts of dispersant, 1.2 parts of wetting agent, 2 parts of defoamer and 430 parts of heavy calcium into the dispersion tank in sequence, and increase the speed of the disperser to 2200r / min, disperse for 15min;

[0042] ③ Then add 18 parts of film-forming aids and continue to disperse for 12 minutes;

[0043] ④ Observe the system obtained by dispersion. If the system does not gel, it means that the emulsion to be tested has good mechanical stability, calcium ion stability and heat resistance; i...

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Abstract

The invention relates to a method for detecting the mechanical stability and other properties of an emulsion. The method is as follows: ① put the emulsion to be tested in a dispersing tank; After adding the dispersant, wetting agent, defoamer and heavy calcium into the dispersing tank in sequence, increase the speed of the dispersing machine to 2000-2500r / min, and disperse for 10-20min; ③After that, add film-forming aids and continue dispersing for 10-15min; ④ Observe the system obtained by dispersion. If the system does not gel, it means that the emulsion to be tested has good mechanical stability, calcium ion stability and heat resistance; if the system gels, it means that the emulsion to be tested has mechanical stability, calcium ion Poor ion stability and heat resistance; in each step, the weight ratio of each detection raw material is as follows: 190-210 parts of emulsion to be tested, 5.0-6.0 parts of dispersant, 1-1.5 parts of wetting agent, and 1.5 parts of defoamer -2.5 parts, heavy calcium 400-450 parts, film-forming aid 15-20 parts; the invention can not only detect the mechanical stability of the emulsion quickly and conveniently, but also can detect the calcium ion stability and heat resistance of the emulsion.

Description

technical field [0001] The invention relates to the field of quality detection of architectural coatings, in particular to a method for detecting properties such as the mechanical stability of emulsions. Background technique [0002] Emulsion is a colloid, which is in a stable colloidal state, but this state is easily destroyed, such as acid-base, temperature, strong shear force, concentration, etc. will destroy it. [0003] The stability of emulsion generally refers to mechanical stability and calcium ion stability. Mechanical stability refers to the stability of the emulsion when it is subjected to mechanical operations, because in the process of preparing the coating, pumping, stirring and spraying during coating are required, so the emulsion and its coating must withstand mechanical operation. Calcium ion stability refers to the stability of the electrolyte, which refers to the stability of the emulsion to the added chemicals, because in the process of preparing the coa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
Inventor 洪杰何玲玲张伟覃国生
Owner SKSHU PAINT
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