Carboxy-functional crosslinkers for epoxy-functional powder-lacquer binding agents
申请人:——
公开号:US20040265597A1
公开(公告)日:2004-12-30
The invention relates to the use of special mixtures of at least two polycarboxylic acids as crosslinker components for thermally curing powder-lacquer binding agents having groups that are capable of reacting with carboxyl groups. The mixtures include at least two polycarboxylic acids each melting above 95° C. and having up to 20 carbon atoms and consist of at least 5 wt. %, of the polycarboxylic acid with the lowest melting point and at least 10 wt. %, of the polycarboxylic acid with the highest melting point of all polycarboxylic acids present in the mixture to at least 5 wt. %. Additionally, the polycarboxylic acid mixture is a solid below 40° C. and a liquid above 160° C.
本发明涉及使用至少两种聚羧酸的特殊混合物作为交联剂成分,用于热固化粉末涂料结合剂,这些结合剂具有能与羧基反应的基团。这些混合物包括至少两种聚羧酸,每种聚羧酸的熔点都在 95 摄氏度以上,并具有多达 20 个碳原子,在混合物中存在的所有聚羧酸中,熔点最低的聚羧酸至少占 5%,熔点最高的聚羧酸至少占 10%。此外,聚羧酸混合物是低于 40 摄氏度的固体和高于 160 摄氏度的液体。