Method for rapidly evaluating freeze-thaw resistance of water-based polymer coating material

A water-based polymer and coating material technology, which is applied in the analysis of materials, flow characteristics, strength characteristics, etc., can solve the problems of time-consuming, heavy workload, and affecting the accuracy of experiments, so as to improve the overall quality and save time. Effect

Inactive Publication Date: 2016-09-21
NIPPON PAINT GUANGZHOU
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, due to the long time-consuming freeze-thaw resistance of latex paint (taking 3 cycles as an example, the entire experiment takes 4 working days) and heavy workload, it is not included in the factory inspection items during the factory production process. This is extremely detrimental to controlling the quality of finished products
At the same time, when developing new latex paint products, freeze-thaw resistance is a must-test item, which also takes a lot of time, and during the test process, due to the temperature inhomogeneity in the freezer, it will cause the same product placed in different positions The experimental results of one sample are different, which affects the accuracy of the experiment

Method used

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  • Method for rapidly evaluating freeze-thaw resistance of water-based polymer coating material
  • Method for rapidly evaluating freeze-thaw resistance of water-based polymer coating material
  • Method for rapidly evaluating freeze-thaw resistance of water-based polymer coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Select 7 latex paint samples A, B, C, D, E, F, G (the mass fractions of antifreeze ethylene glycol in the samples are respectively: 0, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, 1.2%, the complete formulations of samples A to G are shown in Table 1), and the amplitude sweep test was carried out to measure the linear viscoelastic region and oscillation test recommended amplitude of the above-mentioned 7 samples at room temperature;

[0037] 2) According to the test conditions calculated in step 1), the initial rheological information of samples A, B, C, D, E, F, and G was measured using the rotational rheometer oscillation mode;

[0038] 3) Use a rheometer to perform a rheometer freeze-thaw cycle. During the cycle, measure the rheological information of the sample during the rheometer freeze-thaw cycle according to the test conditions calculated in step 1), and obtain the sample at Stable time at low temperature;

[0039] 4) After the sample returns to room temperature, according...

Embodiment 2

[0051] 1) Select 7 latex paint samples H, I, J, K, L, M, N (the mass percentages of antifreeze agent propylene glycol in the samples are respectively: 0, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, 1.2%, the complete formulations of samples H to N are shown in Table 3), and the amplitude sweep test was carried out to measure the linear viscoelastic region and the recommended amplitude of the oscillation test of the above-mentioned 7 samples at room temperature;

[0052] 2) According to the test conditions calculated in step 1), the initial rheological information of samples H, I, J, K, L, M, N is measured using a rotational rheometer oscillation mode;

[0053] 3) Use a rheometer to perform a rheometer freeze-thaw cycle. During the cycle, measure the rheological information of the sample during the rheometer freeze-thaw cycle according to the test conditions calculated in step 1), and obtain the sample at Stable time at low temperature;

[0054] 4) After the sample returns to room temperatu...

Embodiment 3

[0066] 1) Select 4 commercially available latex paint products of the same grade, which are: A company's products 1, 2, 3, B company's products 1, 2, 3, C company's products 1, 2, Nippon's products 1, 2. Carry out the amplitude scanning test to measure the linear viscoelastic region and the recommended amplitude of the oscillation test of the above 10 samples at room temperature;

[0067] 2) According to the test conditions calculated in step 1), the initial rheological information of the above-mentioned 10 samples was measured using the rotational rheometer oscillation mode;

[0068] 3) Use a rheometer to perform a rheometer freeze-thaw cycle. During the cycle, measure the rheological information of the sample during the rheometer freeze-thaw cycle according to the test conditions calculated in step 1), and obtain the sample at Stable time at low temperature;

[0069] 4) After the sample returns to room temperature, according to the test conditions calculated in step 1), use...

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Abstract

The invention discloses a method for quickly evaluating the freeze-thaw resistance of water-based polymer coating materials, which comprises the following steps: 1) preparing a rotational rheometer and a sample to be tested; 2) measuring the linear viscoelastic region of the sample and performing an oscillation test Recommended amplitude; 3) Measure the initial rheological information of the sample; 4) Perform a freeze-thaw cycle of the rheometer and measure the rheological information of the sample during the freeze-thaw cycle; 5) After the freeze-thaw cycle is completed, measure the 6) Evaluate the freeze-thaw resistance of the sample according to the change of the rheology information before and after the freeze-thaw cycle of the sample. The present invention has developed a method and standard for quickly measuring the freeze-thaw resistance of water-based polymer coating materials, which can quickly measure the freeze-thaw resistance of products, and can immediately test the water-based polymer coating materials according to the test results of freeze-thaw resistance of products. Production standards are further defined, so as to improve the overall quality of water-based polymer coating material products.

Description

technical field [0001] The invention relates to a method for quickly evaluating the freeze-thaw resistance of water-based polymer coating materials. Background technique [0002] The freeze-thaw resistance test of water-based polymer coating materials (such as latex paint) refers to whether the water-based paint based on synthetic resin emulsion is frozen and thawed, whether its viscosity, anti-coagulation or anti-caking are damaged. Test methods for changing and maintaining the original performance level. The freeze-thaw resistance of latex paint products will directly affect the transportation and storage stability of latex paint in winter, and it is an important indicator in the development and production process of latex paint. [0003] At present, the field usually measures the freeze-thaw resistance of latex paint products according to GB / T 9268-2008 "Determination of Freeze-Thaw Resistance of Latex Paint". During the test, stir the sample evenly and put it into a cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/14G01N3/60
CPCG01N11/14G01N3/60
Inventor 周复荣熊绍泊向慧
Owner NIPPON PAINT GUANGZHOU
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