REACTIVE LIQUID CAUTION OF BLOCKED ISOCYANATE TERMINATED PREPOLYMERS WITH GLYCOL CATCHERS

摘要

Producing a liquid rubber containing an impact-resistance modifier terminated by an epoxy group, comprises reacting an isocyanate-terminated prepolymer (I) with an epoxy resin, which comprises an epoxy compound (II) including a primary or secondary hydroxyl group, in the presence of a compound consisting of anhydrides, ketones and aldehydes as glycol scavengers. (I), the epoxy resin and the glycol scavenger are mixed with one another, or the epoxy resin is reacted with the glycol scavenger, before they are mixed with the isocyanate-terminated prepolymer. Producing a liquid rubber containing an impact-resistance modifier terminated by an epoxy group, comprises reacting an isocyanate-terminated prepolymer of formula (I) with an epoxy resin, which comprises an epoxy compound of formula (II) including a primary or secondary hydroxyl group, in the presence of a compound consisting of anhydrides, ketones and aldehydes as glycol scavengers. (I), the epoxy resin and the glycol scavenger are mixed with one another, or the epoxy resin is reacted with the glycol scavenger, before they are mixed with the isocyanate-terminated prepolymer. Y1 : n-valent radical of a reactive polymer after removal of terminal amino-, thiol-, hydroxyl-groups; n : 2, 3 or 4, preferably 2 or 3; Y2 : divalent radical of aliphatic, cycloaliphatic, aryl or araliphatic diisocyanates after removal of the isocyanate groups, or trivalent radical of trimers or biurets of aliphatic, cycloaliphatic, aryl or araliphatic diisocyanates after removal of the isocyanate groups; and m : 1 or 2; Y3 : primary or secondary hydroxyl group-containing aliphatic, cycloaliphatic, aryl or araliphatic epoxide after removal of the primary or secondary hydroxyl group; and q : 1-3. Independent claims are included for: (1) the liquid rubber containing an impact-resistance modifier terminated by an epoxy group, obtained by the method; and (2) one-component epoxy resin adhesive or two-component epoxy resin adhesive composition comprising the liquid rubber. [Image].