内墙无机涂料中不挥发物质量损失率试验方法及应用

Test Method and Application of Mass Loss Rate of Non-volatile Substance in Inorganic Coating of Inner Wall

无机涂料因其优异的环保性及稳定性,近年来在室内装饰装修工程中被广泛应用。但我国针对内墙无机涂料还没有相关标准规范,尤其体现无机涂料与有机涂料材料差异性的指标要求还缺乏深入研究。因此,提出干粉无机涂料和液态无机涂料“不挥发物质量损失率”相同的试验方法,评价无机涂料中250~500℃挥发物含量,以作为无机涂料与合成树脂乳液涂料最直接的区分参数。对试验前处理方法进行了系统研究,确定了无机涂料“不挥发物质量损失率”的试验条件为105℃保温3 h。通过对多个干粉无机涂料和液态无机涂料样品进行试验,发现在250~500℃干料的质量损失率波动较大,但均不超过10%,并为相关标准制定给出了合理建议。

In recent years,inorganic coatings have been widely used in interior decoration projects due to their excellent environmental friendliness and stability.However,there are currently no relevant standards and specifications implemented in China specifically for interior wall inorganic coatings.In particular,there is a lack of in-depth research on the indicator requirements that reflect the differences between inorganic and organic coating materials.Therefore,it is proposed to establish a test method that evaluates the volatile substance content in inorganic coatings between 250℃and 500℃,using the same“non-volatile mass loss rate”for both dry powder and liquid inorganic coatings.This test method serves as the most direct differentiating parameter between inorganic coatings and synthetic resin emulsion coatings.A systematic study was conducted on the pre-treatment methods before testing,and it was determined that the test conditions for the“non-volatile mass loss rate”of inorganic coatings are 105℃with a 3-hour incubation period.By conducting tests on multiple samples of dry powder and liquid inorganic coatings,it was found that there is significant fluctuation in the mass loss rate of the dry materials between 250℃and 500℃,but none of them exceed 10%.Reasonable suggestions are provided for the development of relevant standards.