| 摘要 |
The present invention relates to aqueous hybrid binders comprising an aqueous polymer dispersion (PD), and also 0.01%-5% by weight of a photoinitiator, and also to aqueous alkyd systems comprising a water-soluble alkyd resin or an aqueous alkyd or polyurethane emulsion or dispersion, and also 0.01%-5% by weight of a photoinitiator, and to the use thereof in coating compositions, more particularly in coating materials. |
| 主权项 |
1. An aqueous hybrid binder, comprising:
from 0.01%-5% by weight of a photoinitiator, based on 100% of the binder; and an aqueous polymer dispersion (PD) obtained by a process comprising: performing free-radical emulsion polymerization of an α,β-ethylenically unsaturated monomer (M), and optionally a further monomer (M1), to obtain a polymer (P), optionally performing a subsequent chemical deodorization; and adding a water-soluble alkyd resin having a weight-average molecular weight of between 5000 and 40 000 Da, or adding an aqueous alkyd or polyurethane-alkyd emulsion or dispersion, wherein the addition of the alkyd resin, alkyd or polyurethane-alkyd emulsion or dispersion takes place alternatively
i. directly subsequent to the polymerization of M and M1, and optionally the chemical deodorization, at room temperature,ii. subsequent to the polymerization of M and M1, with an afterstir time of 0-2 h, oriii. subsequent to the chemical deodorization, with an afterstir time of 0-2 h,wherein a temperature in the case of addition according to (ii) or (iii) is from 60 to 99° C. |
