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    • 3. 发明授权
    • Liquid coating composition and coating method for forming hard-coat film
on plastics
    • 液体涂料组合物和在塑料上形成硬涂膜的涂布方法
    • US5013788A
    • 1991-05-07
    • US450811
    • 1989-12-14
    • Toshikazu NagashimaHaruki KuramashiYoshihiro NishidaMasahiro Hirukawa
    • Toshikazu NagashimaHaruki KuramashiYoshihiro NishidaMasahiro Hirukawa
    • B32B27/00C08J7/04C09D1/00C09D4/00C09D183/06
    • C08J7/047C09D183/06C09D4/00C08J2483/00
    • The invention provides a liquid coating composition for forming a transparent and hard coating film on a plastic member such as a polycarbonate or polymethyl methacrylate plate. The liquid composition comprises 100 parts by weight of an organotrialkoxysilane R.sup.1 Si(OR.sup.2).sub.3, where R.sup.1 is a C.sub.1 - or C.sub.2 -alkyl group and R.sup.2 is a C.sub.1 -, C.sub.2 - or C.sub.3 -alkyl group, 5-20 parts by weight of an organotrialkoxysilane R.sup.3 Si(OR.sup.2).sub.3, where R.sup.3 is an organic group containing epoxy group, 50-200 parts by weight of an aqueous colloidal silica sol in which the content of SiO.sub.2 is 10-40 wt %, and 0.5-3 parts by weight of a dicarboxylic acid (CF.sub.2).sub.n (COOH).sub.2, where n is an integer from 1 to 5, preferably hexafluoroglutaric acid. On a surface of a plastic member a coating film of this composition is partially cured at 70.degree.-150.degree. C. to turn into a fairly hard but still pliable film. Then the plastic member can be shaped so as to bend the coated surface without suffering from cracking or peeling of the partially cured film. After that the film is treated with an aqueous alkali solution and then further cured at 80.degree.-150.degree. C.
    • 本发明提供一种用于在诸如聚碳酸酯或聚甲基丙烯酸甲酯板的塑料部件上形成透明和硬涂层的液体涂料组合物。 液体组合物包含100重量份的有机三烷氧基硅烷R1Si(OR2)3,其中R1是C1-或C2-烷基,R2是C1-,C2-或C3-烷基,5-20重量份的 有机三烷氧基硅烷R3Si(OR2)3,其中R3是含环氧基的有机基团,50-200重量份SiO 2含量为10-40重量%的胶体硅溶胶水溶液和0.5-3重量份 的二羧酸(CF 2)n(COOH)2,其中n是1至5的整数,优选六氟戊酸。 在塑料构件的表面上,该组合物的涂膜在70-150℃下部分固化,变成相当硬但仍柔软的膜。 然后可以将塑料构件成形为使得涂覆的表面弯曲,而不会部分固化的膜的开裂或剥离。 之后,用碱水溶液处理该膜,然后在80-150℃进一步固化。