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Aqueous dispersions comprising at least one alkyd resin

A water-based dispersion, alkyd resin technology, used in coatings, polyester coatings, polyurea/polyurethane coatings, etc., can solve the problems of complex preparation of dispersions, and achieve high shear stability and low residual monomer content , the effect of safe preparation and processing

Inactive Publication Date: 2011-05-11
EVONIK ROEHM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complex preparation of these dispersions is a disadvantage

Method used

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  • Aqueous dispersions comprising at least one alkyd resin
  • Aqueous dispersions comprising at least one alkyd resin
  • Aqueous dispersions comprising at least one alkyd resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0181] Preparation of the used methacryloyloxy-2-ethyl-fatty acid amide mixture

[0182] To be equipped with the blade stirrer that has stirring jacket and stirring motor, nitrogen inlet, tower bottom (Sumpf) thermometer and the four-neck round bottom flask of distillation bridge add 206.3g (0.70mol) fatty acid methyl ester mixture in advance, 42.8 g (0.70 mol) ethanolamine and 0.27 g (0.26%) LiOH. The fatty acid methyl ester mixture comprises 6% by weight saturated C12-C16 fatty acid methyl ester, 2.5% by weight saturated C17-C20 fatty acid methyl ester, 52% by weight monounsaturated C18 fatty acid methyl ester, 1.5% by weight monounsaturated C20-C24 fatty acid methyl esters, 36% by weight polyunsaturated C18 fatty acid methyl esters and 2% by weight polyunsaturated C20-C24 fatty acid methyl esters.

[0183] The reaction mixture was heated to 150°C. 19.5 ml of methanol were removed by distillation during 2 h. The resulting reaction product contained 86.5% fatty acid ethano...

Embodiment 2

[0198] Example 1 was essentially repeated, except that here 66.29 g of the aqueous dispersion prepared in Example 1 were mixed with 57.2 g of a polyurethane alkyd resin (commercially available under the trade name E150W from the company Worlée). Tests related to solvent resistance, water absorption and scratch resistance were performed on the dried films. The results obtained are given in Table 1.

Embodiment 3

[0207] Example 1 was essentially repeated, but here 117.15 g of the aqueous dispersion prepared in Example 1 was mixed with 33.7 g of a urethane-modified co-solvent-free short oil alkyd resin emulsion. Tests related to solvent resistance, water absorption and scratch resistance were performed on the dried films.

[0208] In this case, the furniture test according to DIN 68861-1 is additionally carried out. The results obtained are given in Table 1.

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Abstract

The present invention relates to an aqueous dispersion, comprising at least one alkyd resin and at least one polymer comprising recurring groups that are derived from monomers A according to formula (I), where R is hydrogen or a methyl group, X1 and X2 independently of each other are oxygen or a group of the formula NR', where R' is hydrogen or a group having 1 to 6 carbon atoms, with the proviso that at least one of the groups X1 and X2 is a group of the formula NR', where R' is hydrogen or a group having 1 to 6 carbon atoms, Z is a compound group, and R1 is an unsaturated group having 9 to 25 carbon atoms.

Description

technical field [0001] The present invention relates to aqueous dispersions comprising at least one alkyd resin. The invention additionally relates to a process for the preparation of these dispersions. Background technique [0002] Coatings, especially lacquers, have been produced synthetically for a long time. Many of these coatings are based on so-called alkyd resins, which are generally prepared using polyfunctional acids, alcohols and fatty acids and / or fatty acid derivatives. A particular class of these alkyd resins form crosslinked films when exposed to oxygen, where the crosslinking proceeds by oxidation in the presence of unsaturated groups. Many of these alkyd resins contain organic solvents or dispersion media so that these resins can be applied in thin layers to the coated body. However, the use of these solvents should be abandoned due to environmental protection and occupational safety. Corresponding resins based on aqueous dispersions have therefore been d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/14C08L75/00
CPCC08L33/14C09D133/14C09D167/08C09D175/06C08L2666/04
Inventor T·许茨J·克内贝尔M·戈梅兹C·M·布雷纳M·贝勒
Owner EVONIK ROEHM GMBH