问题 问答题 简答题

试述装饰涂料的主要组成及其作用。

答案

参考答案:

建筑装饰涂料主要由

1)主要成膜物质主要成膜物质只要是指胶粘剂或固着剂,其作用是将涂料中的其他组分粘结成一个整体,当涂料干燥硬化后,能附着在被涂基层的表面形成连续而坚硬的保护膜

2)次要成膜物质主要是指涂料中的颜料,它们不能单独地构成涂膜,与主要成膜物质一起构成涂膜。使得涂膜有一定的遮盖力,减少涂膜收缩、增加机械强度、防紫外线穿透、提高耐老化性和耐候性

3)辅助成膜物质主要包括溶剂和辅助材料两大类

溶剂一般是可挥发性的液态有机化合物,具有溶解和分散基料,降低涂料的粘度,增加涂料的渗透能力,改善涂料与基层的粘结力,保证涂料施工质量等作用

辅助材料是指能起到进一步改善涂料性能和质量的掺量较少的物质。

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     It was Saturday   1   in May. When   2   Read opened the window and   3   , she smiled and said,"It is going
to be a beautiful day." She   4   her small son up at 8:30 and said to him,"Get up, Tom. We're going to the zoo   5  . Wash your hands and face, brush your teeth and have breakfast quickly. We're going to New York by
train." Tom was six years old. He was very   6   now, because he liked going to the zoo very much, and he also
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