申请人:DAINIPPON INK AND CHEMICALS, INC.
公开号:EP0976738A2
公开(公告)日:2000-02-02
New urea derivatives, a process for their preparation and their use for the hardening of hydroxyl group-containing polymers are described.
The urea derivatives according to the invention have the general formula 1
in which R1-R7 represent a hydrogen atom or a linear or branched C1-C4-alkyl group, preferably methyl, ethyl, n-propyl, isopropyl, n-butyl or isobutyl group, wherein R1-R7 may be identical or different, and R8 represents a linear or branched C1-C6-alkyl group, preferably a methyl, ethyl, n-propyl, isopropyl, n-butyl or isobutyl group.
The urea derivatives of the general formula 1 according to the invention are prepared by reacting a compound of the general formula 2
in which R9 represents a unit from the group -CHO, -CH(OH)-OR8 and -CH(OH)2 and R8 is defined as above, with a urea derivative of the general formula 3
in which R1-R6 are defined as above and optionally followed by etherification of the reaction product obtained with an alcohol of the general formula X-OH, in which X represents a linear or branched C1-C4-alkyl group.
The urea derivatives according to the invention contain no oligomeric fractions and they are extremely suitable for hardening hydroxyl group-containing polymers. They are superior to the reaction products of ethylene ureas and dioxylate derivatives known from the prior art.
本发明描述了新的脲衍生物、其制备工艺及其在硬化含羟基聚合物中的用途。
根据本发明的脲衍生物具有通式 1
其中 R1-R7 代表氢原子或直链或支链 C1-C4 烷基,最好是甲基、乙基、正丙基、异丙基、正丁基或异丁基,其中 R1-R7 可以相同或不同,R8 代表直链或支链 C1-C6 烷基,最好是甲基、乙基、正丙基、异丙基、正丁基或异丁基。
根据本发明,通式 1 的脲衍生物是通过与通式 2 的化合物反应制备的。
其中 R9 代表-CHO、-CH(OH)-OR8 和-CH(OH)2 组中的一个单元,R8 定义同上,与通式 3 的脲衍生物反应
其中 R1-R6 定义同上,然后将反应产物与通式 X-OH 的醇进行醚化,其中 X 代表直链或支链 C1-C4 烷基。
本发明的脲衍生物不含低聚物,非常适用于硬化含羟基的聚合物。它们优于现有技术中已知的乙烯脲和二恶英衍生物的反应产物。