公开(公告)号：DE19801322A1

公开(公告)日：1999-07-22

申请号：DE19801322

申请日：1998-01-16

Applicant: BASF AG

Inventor： BRUCHMANN BERND DR ,  RENZ HANS DR ,  MOHRHARDT GUENTER ,  BOECK HARALD DR

IPC: C07C275/60 ,  C08G18/78 ,  C08G18/79 ,  C08G18/80 ,  C09D175/04 ,  C07D251/34 ,  C09D175/00 ,  B05D7/26

Abstract: Diisocyanates with allophanate groups derived from alicyclic alcohols are obtained by reacting hexamethylene diisocyanate and/or isophorone diisocyanate with alcohols such as cyclohexanol, norbornol etc. Diisocyanates of formula (I) are claimed. R , R = group of formula -(CH2)6- (II) (type Ia), or one of R and R is group (II) and the other is a group of formula (III) (type Ib), or R and R are a group of formula (III) (type Ic). R = 5-6C cycloalkyl (optionally with up to 3 hydrogens replaced by 1-4C alkyl and/or with 1 or 2 CH2 groups replaced by O and/or NH and/or N(1-4C alkyl)), or 1-4C alkyl with one H replaced by 5-6C cycloalkyl (optionally substituted/modified as above) or by a pyrrolidone or morpholine residue with the N atom attached to the alkyl group. Independent claims are included for: (1) mixtures containing diisocyanates (Ia), (Ib) and/or (Ic), urethanes of formula OCNR NHC(O)OR (IV), diisocyanates of formula OCNR N(R )C(O)N(R )R N(R )C(O)NR R NCO (V) and mono-isocyanurates (VII) made up of 3 molecules selected from isophorone diisocyanate (IPDI) or hexamethylene diisocyanate (HDI); (2) a process for the production of these mixtures by reacting IPDI and/or HDI with a 5-6C cycloaliphatic alcohol (optionally modified as for R above) or a 1-4C alkanol substituted as for R above in a mol ratio (isocyanate:alcohol) of (1.5:1)-(20:1) in presence of a catalyst, then deactivating the catalyst and optionally removing unreacted isocyanate; (3) 2-component coating materials containing (A) a compound with groups which can react with polyisocyanate and (B) a compound of formula (I); (4) a coating process in which a coating composition is obtained by mixing (A) and (B) as above and then applied within 12 hours to the surface to be coated; and (5) objects coated by this process. R , R and R = same as R in formula (I); R = H or -COOR (VI), with 2 of the 4 groups being H and the other 2 being group (VI), two groups with the same meaning being separated by R .