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Quick-drying alkide resin and preparation method thereof

An alkyd resin and fatty acid technology, applied in the field of quick-drying alkyd resin and preparation, can solve the problems of complex modification synthesis process, uneven molecular weight, poor pigment fusion, etc., and achieve high hardness, good gloss of paint film, dryness fast effect

Inactive Publication Date: 2006-06-21
JIANGSU SANMU GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: when making self-drying paint, it often feels slow to dry (approximately 6-8 hours for surface drying), poor water resistance, and poor corrosion resistance
However, after modification, not only aromatic solvents such as toluene and / or xylene still need to be used; but also due to cold blending modification, the molecular weight is not uniform, and the performance is worse than that of styrene-modified alkyd resin. The paint film is brittle and aging quickly; , poorly blended with pigments, and the paint film is prone to blooming, so only some low-grade blended paints or floor paints can be used
[0005] Chinese patents 95192452.4, 00812016.1, and 00810902.8 disclose the use of acrylic acid modified alkyd resin, which not only has high cost, but also increases the cost by about 10% compared with styrene modification, and the modification synthesis process is complicated

Method used

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  • Quick-drying alkide resin and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] Embodiment 1: Get 41% linolenic acid, 1% maleic anhydride, 16% phthalic anhydride, and 14% pentaerythritol, put them into a stainless steel reactor, seal the feeding port, open the vent valve, and pass CO 2 After 15 min of gas, stirring was started. Raise the temperature to 160°C, keep it warm for 30-60 minutes, then raise the temperature to 220°C and keep it warm for 6 hours, then take samples for the central control until the central control is qualified. Immediately pass nitrogen or CO after the central control is qualified 2 , cooled to 160°C adding part 200 # After mixing the solvent oil, start to add 28% VT dropwise. The temperature is controlled at 140±2°C. After 3 hours, take a sample for the central control, until the central control is qualified, take a sample to adjust the viscosity, and press filter and pack it when it is suitable. See the table below for specific technical parameters. The total reaction time was 22 hours.

Embodiment 2

[0028] Example 2: 36% soybean oil fatty acid, 0.8% maleic anhydride, 14.5% phthalic anhydride, and 13% pentaerythritol. The operation is the same as in Example 1. Addition and esterification reaction. After meeting the requirements, start to add 35.7% of VT dropwise. The operation is the same as in Example 1. 1, gained resin is lighter than embodiment 1 except color 3 # Other than that, the rest of the indicators are the same.

Embodiment 3

[0029] Example 3: 32% soybean oil fatty acid, 0.6% maleic anhydride, 12.4% phthalic anhydride, and 11% pentaerythritol. The operation is the same as in Example 1. Addition and esterification are reversed. After the requirements are met, 44% of VT is added dropwise. The operation is the same as the implementation Example 1, gained resin except that color is lighter than embodiment 1 3 # Other than that, the rest of the indicators are the same.

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Abstract

The invention relates the method for preparation of alkide resin which possesses easy drying, good water resistance and corrosion resistance, comprising the following characteristics: esterifying and copolymerizing 32í½50wtúÑ fatty acid without conjugate double bonds, 0.5í½1.5wtúÑ maleic acid, 12.5í½16.5wtúÑ benzoic anhydride, 11í½14wtúÑ pentaerythritol or glycerin, 28í½50wtúÑ vinyltoluene. The method not only reduces the cost of production, but also makes the molecular weight distribution of production more homogeneous, and makes the resin easier drying, better water resistance and corrosion resistance. So the range of use of alkide resin is extended.

Description

technical field [0001] The present invention relates to an improved alkyd resin and its preparation method, in particular to a kind of alkyd resin which is synthesized by low price and does not contain conjugated double bond fatty acid, and is modified by vinyl toluene (VT), which has fast drying time and water resistance Fast-drying alkyd resin with good corrosion resistance and good corrosion resistance and its preparation method. Background technique [0002] Alkyd resin, usually obtained by esterification of 6.5-9%wt polyol (pentaerythritol or equivalent glycerin), 12-16%wt polyacid (phthalic anhydride), 22-40%wt fatty acid through esterification Synthetic resins for medium and high-grade paints. It can be used as primer, topcoat and varnish; it can also be combined with other resins such as amino resin and polyurethane resin to form baking varnish or two-component paint; and it can be used to modify perchlorethylene paint and nitro paint to improve its performance. pe...

Claims

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Application Information

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IPC IPC(8): C08G63/49
Inventor 杨树民刘亦明
Owner JIANGSU SANMU GROUP CORPORATION
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