摘要： 以甲基三甲氧基硅烷、苯基三甲氧基硅烷、γ-缩水甘油醚氧丙基三甲氧基硅烷(KH-560)为原料，以盐酸胍为固化促进剂制备了聚甲基丙烯酸甲酯(PMMA)用水性加硬涂料，并通过正交实验确定了影响涂层性能的关键因素。 为提高加硬涂层的耐高低温冲击性能和抗开裂能力，在涂层中引入了纳米乳胶粒子，据此制备的 PMMA 用有机硅杂化耐磨加硬涂层的硬度为 6H，耐摩擦性能优异，附着力 0 级，可见光区透光度接近 90%，在热冲击实验中循环 100 次，涂层外观依然完好。所选 3 种纳米乳胶粒子均能达到类似的效果，意味着纳米乳胶粒子对硬质涂层的增韧作用可能具有普适性。

关键词: PMMA, 耐磨加硬涂层, 有机硅杂化, 乳胶粒子, 增韧

Abstract: High performance waterbome hard coating materials used in the protection of poly( methylmethacrylate ) substrates were prepared from the guanidine hydrochloride as curing catalyst and the hydrolysate prepared from the mixture of methyltrimethoxysilane, phenyltrimethoxysilane and KH-560 as binder. The significant influential factors on the properties of hard coating were determined by orthogonal experimental design and rang analysis. In order to improve the thermal shock performance of hard coating, nano-sized latex particles were hybridized. The optimal coating thereby showed 6H hardness, excellent abrasion resistance, 90% transparency in visible light region, 0-grade adhesion and remarkable thermal shock performance. It was found that all emulsions used in present study could achieve similar results, implying that the toughening effect of the nano-sized latex particles on the hard coating could be universal.

Key words: PMMA, hard coating, latex particles, toughening