Process for making epoxy novolac resins with low hydrolyzable chlorine
and low ionic chloride content
    1.
    发明授权
    Process for making epoxy novolac resins with low hydrolyzable chlorine and low ionic chloride content 失效
    制备具有低水解氯和低离子氯化物含量的环氧酚醛树脂的方法

    公开(公告)号:US4485221A

    公开(公告)日:1984-11-27

    申请号:US548273

    申请日:1983-11-03

    IPC分类号: C08G59/00 C08G59/08 C08G59/14

    CPC分类号: C08G59/08 C08G59/00

    摘要: A process for making glycidyl ethers of novolac resins, particularly phenol or cresol novolacs, with low hydrolyzable chlorine and low ionic chloride content, said resins prepared by reaction of a novolac resin with epichlorohydrin in an alkaline medium, comprises dissolving the crude epoxy novolac resin in an inert organic solvent, treating the solution obtained with an excess amount of an alkali metal alkoxide, neutralizing the excess alkali with a weak acid, removing the alkali metal chloride formed by filtration in the presence of a filter aid and isolating the epoxy novolac resin by distillation of the solvent.

    摘要翻译: 通过在碱性介质中通过酚醛清漆树脂与表氯醇反应制备的所述树脂制备酚醛清漆树脂,特别是苯酚或甲酚酚醛清漆的缩水甘油醚,具有低水解氯和低离子氯离子含量的方法,包括将粗环氧酚醛清漆树脂溶解在 惰性有机溶剂,用过量的碱金属醇盐处理得到的溶液,用弱酸中和过量的碱,除去在助滤剂存在下通过过滤形成的碱金属氯化物,并用环氧酚醛清漆树脂隔离环氧酚醛清漆树脂 蒸馏溶剂。

    Process for making epoxy novolac resins with high epoxy values
    2.
    发明授权
    Process for making epoxy novolac resins with high epoxy values 失效
    具有高环氧值的环氧酚醛树脂的制备方法

    公开(公告)号:US4518762A

    公开(公告)日:1985-05-21

    申请号:US530177

    申请日:1983-09-08

    IPC分类号: C08G59/00 C08G59/08 C08G59/40

    CPC分类号: C08G59/08

    摘要: An improved process for making glycidyl ethers of novolac resins, particularly cresol and phenol novolacs, by reaction of the novolac with a solid alkali metal hydroxide in excess epichlorohydrin and in the presence of an alcohol cosolvent where the reaction mixture contains a small amount of water, wherein the improvement comprises carrying out the etherification and dehydrochlorination in a combined one step process, in the absence of a catalyst specific for chlorohydrin formation, and using the solid alkali metal hydroxide in the form of tiny beads.

    摘要翻译: 通过酚醛清漆与固体碱金属氢氧化物在过量表氯醇中的反应和醇共溶剂的存在下,在反应混合物含有少量水的情况下制备酚醛清漆树脂,特别是甲酚和苯酚酚醛清漆的缩水甘油醚的改进方法, 其中改进包括在不存在氯代醇形成特异性的催化剂的情况下以组合的一步法进行醚化和脱氯化氢,并且使用微小珠形式的固体碱金属氢氧化物。