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Test method for color retention of exterior finishes

A test method and color retention technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of large impact on the environment and climate, deviation of test results, high subjectivity, etc., and achieve the effect of shortening test time and rapid test

Active Publication Date: 2018-12-11
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing test method for color retention is the QUV artificial aging resistance test. The color change is distinguished by observing the discoloration. However, this method deviates from the actual test results and cannot fully reflect the test results.
Another method is simply to add color paste and test according to the actual construction, place it outdoors, and through visual observation, this method of testing can reflect the color retention of exterior topcoats, but the test time is long, subjectivity is high, and the environment and climate affect it Big

Method used

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  • Test method for color retention of exterior finishes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment includes the following steps:

[0029] Step 1: Scrape the putty layer: Scrape the putty layer on the wall or test board, let the wall or test board cure for 18 hours, then proceed to the next step;

[0030] Step 2: Coating the top coat to be tested: Coat the top coat to be tested on the putty layer of the wall or test panel, the coating rate of the top coat to be tested is 8㎡ / kg, let the wall or test panel cure for 18 hours , Proceed to the next step;

[0031] Step 3: Coating PVA-iron blue water solution: Coat a PVA-iron blue water solution on the wall or test panel, let the wall or test panel cure 18, then proceed to the next step;

[0032] Step 4: Observation test: Let the wall or test panel be exposed outdoors for a long time until the PVA-iron blue aqueous solution on the surface completely changes color, and perform 4 observation records during the exposure of the wall or test panel. The method is:

[0033] a. Use the CM-2600D color measuring instrument pro...

Embodiment 2

[0039] This embodiment includes the following steps:

[0040] Step 1: Scrape the putty layer: Scrape the putty layer on the wall or test board, let the wall or test board cure for 18 hours, then proceed to the next step;

[0041] Step 2: Coating the top coat to be tested: Coat the top coat to be tested on the putty layer of the wall or test panel, the coating rate of the top coat to be tested is 8㎡ / kg, let the wall or test panel cure for 18 hours , Proceed to the next step;

[0042] Step 3: Coating PVA-iron blue water solution: Coat a PVA-iron blue water solution on the wall or test panel, let the wall or test panel cure 18, then proceed to the next step;

[0043] Step 4: Observation test: Let the wall or test panel be exposed outdoors for a long time until the PVA-iron blue aqueous solution on the surface completely changes color, and perform 4 observation records during the exposure of the wall or test panel. The method is:

[0044] a. Use the CM-2600D color measuring instrument pro...

Embodiment 3

[0050] This embodiment includes the following steps:

[0051] Step 1: Scrape the putty layer: Scrape the putty layer on the wall or test board, let the wall or test board cure for 24 hours, then proceed to the next step;

[0052] Step A: Coating primer: Apply primer that matches the top paint to be tested on the putty layer of the wall or test panel, then let the wall or test panel dry for 24 hours, and wait for the bottom of the wall or test panel After the paint dries, proceed to the next step;

[0053] Step 2: Coating the top coat to be tested: Coat the top coat to be tested on the putty layer of the wall or test panel, the coating rate of the top coat to be tested is 12㎡ / kg, let the wall or test panel cure for 24 hours , Proceed to the next step;

[0054] Step 3: Coating PVA-iron blue aqueous solution: Coat two PVA-iron blue aqueous solutions on the wall or test panel, let the wall or test panel cure for 24 hours, then proceed to the next step;

[0055] Step 4: Observation test: L...

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Abstract

The invention relates to the field of finishing coating property test, and in particular to a method for testing color retention of a finishing coating. The method comprises the following steps: I, coating a putty layer, namely, coating a putty layer on a wall surface or a test plate; II, coating a finishing coating to be tested, namely, coating the finishing coating on the putty layer on the wall surface or the test plate; III, coating a PVA-iron blue solution, namely, coating at least one PVA-iron blue solution on the wall surface or the test plate till a surface to be tested on the wall surface or the test plate is completely covered; IV, performing observation test, namely, exposing the wall surface or the test plate in outdoor intensive sunshine for a long time till the color of the PVA-iron blue solution on the surface is completely changed; V, performing result evaluation, namely, evaluating the change tendency of the color retention property of the finishing coating to be tested according to color difference data and color variation area change recorded according to multiple times of observation. The method is accurate in test and short in detection period, and the color retention property of the finishing coating can be rapidly reflected.

Description

Technical field [0001] The invention relates to the field of external topcoat performance testing, in particular to a method for testing the color retention of external topcoats. Background technique [0002] The existing color retention test method is the QUV artificial aging resistance test, which distinguishes the color change by observing the color change, but this method is deviated from the actual test result and cannot fully reflect the test result. Another method is to simply add color paste to test it according to actual construction, and place it outdoors. Through visual observation, this method test can reflect the color retention of the external topcoat, but the test time is long and subjective, and the environment and climate affect it Big. Therefore, it is very important to develop a test method that can quickly test the color retention of external topcoats and more accurately reflect the color retention of external coatings. Summary of the invention [0003] The p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00
CPCG01N17/00G01N17/004
Inventor 洪杰赖李芳
Owner SKSHU PAINT