公开(公告)号：JPH1081732A

公开(公告)日：1998-03-31

申请号：JP20010497

申请日：1997-07-25

Applicant: HOECHST AG

Inventor： NEUMANN UWE DR ,  GERLITZ MARTIN DR

IPC: C08G59/14 ,  C08G59/04 ,  C08G59/18 ,  C08G59/50 ,  C09D163/00

Abstract: PROBLEM TO BE SOLVED: To obtain a water-dispersing hardener for an epoxy resin, manifesting a good emulsifying activities with the liquid epoxy resin, excellent in compatibility with a solid resin disperse substance and obviously increasing the viscosity at the end of the processing time when the hardener is combined with the epoxy resin. SOLUTION: This curing agent is obtained by reacting (A) a mixture of two or more aliphatic polyols having 200-20,000g/mol weight average molecular weight MW of the mixture and including at least one kind of the polyols having >=4,000g/mol weight average molecular weight MW with (B) at least one kind of epoxy compound having at least two epoxy groups in a molecule and 500-10,000mmol/kg specific content of the epoxy group (100-2,000g/mol epoxy equivalent) at the first reaction stage to provide epoxide-polyol adduct, and further reacting the epoxy-polyol adduct with (C) polyamines having at least three aminic hydrogen atoms and at least one primary amino group per molecule.

公开(公告)号：DE19515967A1

公开(公告)日：1996-11-07

申请号：DE19515967

申请日：1995-05-02

Applicant: HOECHST AG

Inventor： MERTEN GERHARD ,  SCHAEFER RALPH ,  SCHAFHEUTLE MARKUS DR ,  GERLITZ MARTIN DR

IPC: C08L29/14 ,  C08G18/08 ,  C08G18/40 ,  C08G18/62 ,  C08G18/67 ,  C08G18/80 ,  C08J5/14 ,  C09D129/14 ,  C08J3/03 ,  C08J3/18 ,  C08G18/34 ,  C08G18/38 ,  C08G18/65 ,  C08G18/48 ,  C09D175/04 ,  C09D5/02

Abstract: The prodn. of water-dilutable polyvinyl butyral (PVB) dispersions (I) comprises reacting (A) aliphatic acid(s) contg. 1-3 isocyanate-reactive gps. and 1-3 acid gps. with (B) polyisocyanates with an average functionality of at least 2, in an amt. such that the ratio of NCO gps. in (B) to NCO-reactive gps. in (A) = (2.2:1)-(1.7:1), until the content of residual NCO gps. reaches the calcd. value, then reacting 25-75% of the remaining NCO gps. with (C) mono-alcohol(s) and/or mono-amine(s), until the calculated NCO gp. content is obtd., and reacting the NCO- functional emulsifier resin thus obtd. with (D) a mixt. of (D1) 30-100 wt% PVB and (D2) 0-70 wt% suitable plasticiser resin(s) in the presence of suitable solvents, until all the NCO gps. are completely reacted, to give a prod. contg. acid gps. in an amt. such that the solid resin has an acid no. of 5-50 mg/g. Also claimed are: (i) aq. PVB dispersions (I) obtd. by this process, and aq. PVB dispersions contg. 0.5-20 wt% organic solvent; (ii) mixts. of aq. binders contg. (I), pref. together with aq. dispersions of phenolic resins or amino resins.

公开(公告)号：DE19630277A1

公开(公告)日：1998-01-29

申请号：DE19630277

申请日：1996-07-26

Applicant: HOECHST AG

Inventor： NEUMANN UWE DR ,  GERLITZ MARTIN DR

IPC: C08G59/14 ,  C08G59/04 ,  C08G59/18 ,  C08G59/50 ,  C09D163/00 ,  C08G63/91 ,  C08G65/32 ,  C08G69/48 ,  C08J3/03 ,  C08J3/24 ,  C08J5/00 ,  C08L63/00