Treatment of glass
    2.
    发明授权
    Treatment of glass 失效
    玻璃处理

    公开(公告)号:US4023951A

    公开(公告)日:1977-05-17

    申请号:US607544

    申请日:1975-08-25

    CPC分类号: C03C3/19 C03C23/00

    摘要: A process for strengthening or toughening a phosphate glass the process comprising contacting the surface of the phosphate glass with a solution of a carboxylic acid in a liquid diluent, the carboxylic acid comprising an amino-carboxylic acid, or a hydroxy-carboxylic acid, or a mixture of an amino-carboxylic acid and a hydroxy-carboxylic acid. Particularly useful is an aqueous solution of an amino-polycarboxylic acid.

    摘要翻译: 一种用于加强或增韧磷酸盐玻璃的方法,该方法包括使磷酸盐玻璃的表面与羧酸在液体稀释剂中的溶液接触,所述羧酸包含氨基羧酸或羟基羧酸,或 氨基羧酸和羟基羧酸的混合物。 特别有用的是氨基 - 多元羧酸的水溶液。

    Stabilized chlorinated solvents
    4.
    发明授权
    Stabilized chlorinated solvents 失效
    稳定氯化溶剂

    公开(公告)号:US4362573A

    公开(公告)日:1982-12-07

    申请号:US172974

    申请日:1980-07-28

    CPC分类号: C23G5/0288 C07C17/42

    摘要: A solvent composition comprising 1,1,1-trichloroethane and a stabilizing amount of an epoxide of formula ##STR1## wherein R.sub.1 and R.sub.2 are hydrogen, alkyl of 1 to 4 carbon atoms, phenyl or benzyl,R.sub.3 is hydrogen or alkyl of 1 to 4 carbon atoms,R.sub.4 is alkyl of 1 to 4 carbon atomsand n is 0 or 1.Preferably the or each alkyl group contains 1 or 2 carbon atoms; examples of useful epoxides are ethyl trans-2,3-epoxybutyrate, ethyl 3,4-epoxy-3-methylvalerate and ethyl beta-methyl-beta-phenylglycidate.

    摘要翻译: 包含1,1,1-三氯乙烷和稳定量的式(I)的环氧化物的溶剂组合物,其中R 1和R 2是氢,1至4个碳原子的烷基,苯基或苄基,R 3是氢或1至 4个碳原子,R4是1至4个碳原子的烷基,n是0或1.优选地,每个烷基含有1或2个碳原子; 有用的环氧化物的实例是反式-2,3-环氧丁酸乙酯,3,4-环氧-3-甲基戊酸乙酯和β-甲基-β-苯基缩水甘油乙酯。