发明授权
US4621133A Preparation of curable etherified aminoplast resins and of surface
coating resins
失效
可固化醚化氨基塑料树脂和表面涂料树脂的制备
- 专利标题： Preparation of curable etherified aminoplast resins and of surface coating resins
- 专利标题（中）： 可固化醚化氨基塑料树脂和表面涂料树脂的制备
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申请号： US752067申请日： 1985-07-05
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公开(公告)号： US4621133A公开(公告)日： 1986-11-04
- 发明人: Harro Petersen , Gunther Immel , Wolfram Weiss , Horst Schmidt , Gerd Busse
- 申请人： Harro Petersen , Gunther Immel , Wolfram Weiss , Horst Schmidt , Gerd Busse
- 申请人地址： DEX Ludwigshafen
- 专利权人： BASF Aktiengesellschaft
- 当前专利权人： BASF Aktiengesellschaft
- 当前专利权人地址： DEX Ludwigshafen
- 优先权： DEX3425131 19840707
- 主分类号： C08G12/00
- IPC分类号： C08G12/00 ; C08G12/12 ; C08G12/40 ; C08G12/42 ; C09D161/20 ; C09D161/32 ; C08G12/28
摘要：
A process for the preparation of curable etherified aminoplast resins based on urea/aldehyde polycondensates, and the preparation of surface coating resins.Urea is first reacted with an .alpha.,.alpha.-dialkylaldehyde, as much as 50 mol % of which may be replaced by formaldehyde, in a molar ratio urea/aldehyde of about 1:2, at from 50.degree. to 120.degree. C., in the presence of an acid and in the presence or absence of an alcohol or of other organic solvents, and the 2-oxohexahydropyrimidine derivative obtained in this cyclocondensation is then condensed with formaldehyde in the presence of one or more alcohols and an acid.These aminoplast resins are useful as both acid-curable resins and as resins for baking finishes.
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