The present invention relates to catalytic compositions for esterification, transesterification and polycondensation reactions, a process for the catalysis of said reactions employing such catalytic compositions and polyesters or resins obtainable by this process.
The present invention relates to catalytic compositions for esterification, transestrification and polycondensation reactions, a process for the catalysis of said reactions employing such catalytic compositions and polyesters for resins obtainable by this process.
Hybrid polymer, aqueous dispersions and coating composition therefrom
申请人:Akzo Nobel N.V.
公开号:EP0469646A1
公开(公告)日:1992-02-05
A hybrid polymer of a core/shell structure is provided which is based upon (A) a polymer (core) of an unsaturated fatty acid group functionalized poly(epoxyester) onto which (B) at least one addition polymer-based chain (shell) has been grafted. Also provided are aqueous dispersions of these hybrid polymers and coating compostions therefrom, which coating compositions are especially suited for use as clear coatings, pigmented coatings and primers/surfacers.
Aqueous dispersions of self-crosslinking acrylic polymers and water-based thermosetting compositions therefrom
申请人:Akzo Nobel N.V.
公开号:EP0508536A1
公开(公告)日:1992-10-14
An aqueous dispersion of a self-crosslinking acrylic polymer is provided which is the aqueous emulsion polymerization product of a particular monomer mixture including both glycidyl and hydroxyl group-containing addition polymerizable monomers. Water-based thermosetting compositions are also provided which are based upon these aqueous dispersions and a strong basic catalyst. These thermosetting composition are particularly suitable for use in formulating aqueous coatings for general industrial use.
Water-dispersible hybrid core-shell polymer, an aqueous dispersion thereof, and a coating composition made therefrom
申请人:Akzo Nobel N.V.
公开号:EP0555903A1
公开(公告)日:1993-08-18
The invention relates to a water-dispersible hybrid polymer comprising an unsaturated fatty acid-functionalised polyester at least 40 mole% of which contains conjugated double bonds, which polyester has an acid number of less than 5 (mg KOH/g) and is built up of cycloaliphatic and/or aromatic dicarboxylic acids and aliphatic dicarboxylic acids in a molar ratio of 5:1 to 40:1, onto which polyester an addition polymer chain (shell) having an acid number in the range of 20 to 100 (mg KOH/g) has been grafted.
Aqueous dispersions of said hybrid polymers are suitable for use in aqueous coating compositions with a high solids content. Films produced by using such coating compositions have good physical and mechanical properties and prove chemical - and water-resistant as well. A process for coating a substrate with such composition is also provided.