首页>
外国专利>
process for the production of naturally - netzenden binders for cathodic abscheid - bare elektrotauchlacke
process for the production of naturally - netzenden binders for cathodic abscheid - bare elektrotauchlacke
展开▼
机译:天然-净重阿布沙伊德的净禅合粘合剂的生产工艺-裸露的Elektrotauchlacke
展开▼
页面导航
摘要
著录项
相似文献
摘要
Process of producing, and binders water soluble upon neutralization with acids which are depositable at the cathode of an electrodeposition system and can be crosslinked through thermic polymerization without additional crosslinking components characterized in that (A) 1 mole of an isocyanate having the formula OCN-R-(NCO)n, in which R is an aromatic, aliphatic or cycloaliphatic hydrocarbon radical and n is 1 or 2, is reacted at from 0 DEG -50 DEG C., with (a) from 0.1 to 0.5 moles, if n=1, or 0.1 to 1.0 moles, if n=2, of a tertiary dialkylalkanol amine, and subsequently with (b) from 0.5 to 0.9 moles, if n=1, or 1.0 to 1.9 moles, if n=2, of a compound carrying one free hydroxy group and 1-3 CH2=CR1 groups, where R1=H or CH3, and (B) the intermediate resulting from (A) carrying an average of 1 free isocyanate group is reacted at from 10 DEG -100 DEG C., with the hydroxy groups of an epoxy resin/amine adduct until an isocyanate value of 0 is obtained, the quantities between the components being chosen in order that the final product, in 1000 molecular weight units, carries at least 0.5 chain end or side chain double bonds and at least 0.15 basic nitrogen atoms. The reaction proceeds in a single kettle to produce compounds having superior dispersibility and stability in water, and are easily applied as a binder.
展开▼