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Method for preparing anti-scratch matt alkyd resin

An alkyd resin, anti-scratch technology, used in coatings, polyester coatings, etc., can solve the problems of increased cost, expensive matte powder, and reduced transparency of the paint film, and achieves improved scratch resistance and soft hand feel. , the effect of easy extinction

Active Publication Date: 2013-01-30
UNION FOSHAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you require lower gloss, you need to add more matting powder, which will not only reduce the transparency of the paint film, but also increase the cost due to the high price of matting powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] According to Example 1 in Table 1, fatty acids, organic acid anhydrides, and polyols were added sequentially according to the formula weight ratio. After the catalyst was added when the temperature was raised to 120°C by passing N2, the temperature was kept at 160°C for 1.5h, and the temperature was raised to 190°C at 10°C / h, and kept for 2h. Cool down to 160°C and add polyols and fatty acids according to the formula, heat up to 210°C and keep warm until the viscosity and acid value are acceptable, then cool down to below 120°C and slowly add organic solvents (xylene, butyl ester, etc.) to dilute and stir for 0.5h. Filtration yields a scratch-resistant matte alkyd resin.

Embodiment 2

[0022] Example 2, Example 3 The preparation steps refer to Example 1.

[0023] According to relevant national standards, the basic properties of the isocyanate-modified alkyd resin of the present invention were tested, and the test results are shown in Table 2.

[0024] Test items test result Inspection standards Color (iron-cobalt colorimetric) number ≤3 GB / T1722-1992 Appearance and Transparency light yellow transparent liquid GB / T1721-1979

[0025] oiliness ≤35 Viscosity (Pa.s, 25°C) 40～60 GB / T1723-1993 Solid content% 60±2 GB / T1725-1989 Acid value mgKOH / g ≤10 HG 2-569-1977 Hydroxyl value / mgKOH / g 110±10 HG 2-569-1977

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Abstract

The invention relates to a method for preparing anti-scratch matt alkyd resin. The anti-scratch matt alkyd resin comprises the following components in percentage by weight: 17 to 35 percent fatty acid, 16 to 30 percent of polyhydric alcohol, 18 to 40 percent of organic acid anhydride, 0 to 2 percent of esterifying catalyst, and 30 to 45 percent of solvent. The anti-scratch matt alkyd resin is synthesized by terephthalic acid or isophthalic acid with a symmetric structure and neopentyl glycol, diglycol and pentaerythritol by a polymer method, and has the characteristics of quick dryness, easy extinction, good transparency and the like. A PU () high-grade matt wood painted tool made by the anti-scratch matt alkyd resin is soft in hand feel, plump and smooth, and rigid with soft, gives people the feeling of elegance and comfort, adapts to modern aesthetic view, and is popular in market and clients. The anti-scratch matt alkyd resin can be widely applied to the surface of woods, metal, plastic and other products for protecting and decorating.

Description

technical field [0001] The present invention relates to a preparation method of anti-scratch matt alkyd resin, which specifically refers to the use of dibasic acid anhydrides with symmetrical structures in the synthesis of the resin to improve its scratch resistance, and the ratio of pentaerythritol and dihydric alcohols is reasonably matched. The modified resin has the properties of scratch resistance, easy extinction, quick drying, wear resistance and aging resistance. Background technique [0002] Alkyd resin is one of the most widely used synthetic resins for paints. The usual alkyd resin is synthesized from polyacids, polyols and vegetable oils (fatty acids). In recent years, in order to meet different performance requirements, the variety of modified alkyd resins has increased, including modified alkyd resins such as rosin, styrene, acrylic acid, and silicone. With the improvement of people's material and cultural living standards, consumers have higher and higher req...

Claims

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Application Information

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IPC IPC(8): C08G63/49C08G63/676C09D167/08
Inventor 许钧强孙小光李泽刚张振东
Owner UNION FOSHAN CHEM
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