In a polyvinyl butyral (PVB) sheet plasticized with a multiester of an alcohol having 2 to 4 hydroxyl groups and a C16 to C20 unsaturated fatty acid having a hydroxyl group attached to the acid molecule, which sheet does not craze polycarbonate or polyacrylate when in contact therewith, the addition of a synergistically effective amount of a monoester of a glycol and such C16 to C20 acid improves the low temperature penetration resistance and adhesion properties of such sheet without significant loss in its resistance to stress cracking polycarbonate or polyacrylate in a laminated glass assembly.
在用具有 2 至 4 个羟基的醇和酸分子上带有羟基的 C16 至 C20 不饱和
脂肪酸的多元酯增塑的聚
乙烯醇缩
丁醛 (PVB) 片材中,当片材与聚
碳酸酯或聚
丙烯酸酯接触时不会开裂、添加增效有效量的
乙二醇单酯和这种 C16 至 C20 酸可提高这种薄片的低温抗渗透性和粘附性,而不会显著降低其在夹层
玻璃组件中抗应力开裂聚
碳酸酯或聚
丙烯酸酯的性能。