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公开(公告)号：US20210371678A1
公开(公告)日：2021-12-02
申请号：US17327561
申请日：2021-05-21
IPC分类号： C09D5/44 , C09D175/12 , C25D13/04
摘要： Cathodic electrocoating compositions and methods for coating electrically conductive substrates are provided. An exemplary cathodic electrocoating composition includes an aqueous carrier and a film forming binder dispersed in the carrier. Further, the cathodic electrocoating composition includes chitosan as an edge protective agent.
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公开(公告)号：US20240263037A1
公开(公告)日：2024-08-08
申请号：US18615570
申请日：2024-03-25
发明人： Harshit Gupta , Arun Surendranath , Hanxiang Zeng
IPC分类号： C09D163/00 , C25D13/04 , C25D13/22
CPC分类号： C09D163/00 , C25D13/04 , C25D13/22
摘要： Cathodic electrocoating composition with improved edge protection and coating appearance are provided. An exemplary cathodic electrocoating composition includes an aqueous carrier, a film forming binder dispersed in the carrier and including an epoxy-amine adduct and a blocked polyisocyanate crosslinking agent; a pigment paste; a water-soluble cellulose ether; and a cationic microgel dispersion which is prepared by a process comprising dispersing in aqueous medium a mixture of a cationic polyepoxide-amine reaction product which contains amine groups selected from the group consisting of primary amine groups, secondary amine groups, and mixtures thereof and a polyepoxide crosslinking agent and heating the mixture to a temperature sufficient to crosslink the mixture to form the cationic microgel dispersion. The water-soluble cellulose ether may be hydroxyethyl cellulose.
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公开(公告)号：US20210269667A1
公开(公告)日：2021-09-02
申请号：US17184149
申请日：2021-02-24
发明人： Harshit Gupta , Arun Surendranath , Hanxiang Zeng
IPC分类号： C09D163/00 , C25D13/04 , C25D13/22
摘要： Cathodic electrocoating composition with improved edge protection and coating appearance are provided. An exemplary cathodic electrocoating composition includes an aqueous carrier, a film forming binder dispersed in the carrier and including an epoxy-amine adduct and a blocked polyisocyanate crosslinking agent; a pigment paste; a water-soluble cellulose ether; and a cationic microgel dispersion which is prepared by a process comprising dispersing in aqueous medium a mixture of a cationic polyepoxide-amine reaction product which contains amine groups selected from the group consisting of primary amine groups, secondary amine groups, and mixtures thereof and a polyepoxide crosslinking agent and heating the mixture to a temperature sufficient to crosslink the mixture to form the cationic microgel dispersion. The water-soluble cellulose ether may be hydroxyethyl cellulose.
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