What does the test to evaluate a resilient wall latex paint include?
In order to evaluate the elastic wall latex paint, in addition to the general latex paint performance test (GB/T 9755-- 2001), the following tests should also be considered:
(1) Crack bridging performance test (ASTM C 836- -89).
(2) Water vapor transmission test (ASTM D 1653- 93 or GB/T 17146-- 1997).
(3) Anti-carbon dioxide diffusion test.
(4) Flexibility test (GB/T 1731).
(5) Determination of tensile strength and elongation
① Cast a film on release paper, control the dry film thickness to 375~400μm, and make it in two steps; each layer has a thickness of 185~200um. The interval between the two courses is 24h.
② After drying for 7 days, peel off the coating and cut into strips.
③Use a Tensile Testing Machine to carry out a tensile test to measure the tensile strength and elongation, and the tensile speed is 100~50mm/s.
