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1,6-hexanediol modified unsaturated polyester and preparation method thereof
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A hexanediol and unsaturated technology, which is applied in the field of 1,6-hexanediol modified unsaturated polyester and its preparation, can solve the problems of poor crack resistance, impact resistance, poor crack resistance and fatigue resistance, and surface cracking. Sticking and other problems, to achieve the effect of improving crack resistance, improving air-drying performance, and preventing contact area
Inactive Publication Date: 2019-06-25
HUIZHOU CHANGRUNFA PAINT +1
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Problems solved by technology
[0002] Traditional unsaturated polyester has excellent process performance, such as wide processing temperature, light color, etc. The cured unsaturated polyester has good comprehensive properties, good corrosion resistance, electrical properties and good heat resistance, etc. The raw materials used are from a wide range of sources, and the price is cheaper than epoxy resin, but there are also shortcomings, such as large shrinkage during curing, high brittleness of the cured product, and the brittleness of the product makes the impact resistance, cracking resistance and fatigue resistance of the product poor. The surface of the film is soft and has a large contact area with oxygen in the air, resulting in a sticky and rough surface
[0003] In the existing unsaturated polyester resins, small molecular diols are often used, such as ethylene glycol, diethylene glycol, glycerol, etc. Due to the short molecular chain, the resin has poor flexibility and poor crack resistance.
Method used
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Embodiment 1
[0015] A kind of 1,6-hexanediol modified unsaturated polyester, in weight percent:
[0027] A 1,6-hexanediol modified unsaturated polyester provided in this example has a finished viscosity of 6000±1000mPa.s / 25°C, a solid content of 85%±1.5, an acid value of 20-30mgKOH / g, and gelatinization Time: 10-18min. Color: ≤2# (Fe-Co).
Embodiment 2
[0029] A kind of 1,6-hexanediol modified unsaturated polyester, in weight percent:
[0041] A 1,6-hexanediol modified unsaturated polyester provided in this example has a finished viscosity of 6000±1000mPa.s / 25°C, a solid content of 86%±1.5, an acid value of 20-30mgKOH / g, and gelatinization Time: 10-19min. Color: ≤2# (Fe-Co).
Embodiment 3
[0043] A kind of 1,6-hexanediol modified unsaturated polyester, in weight percent:
[0055] A 1,6-hexanediol modified unsaturated polyester provided in this example has a finished viscosity of 6000±1000mPa.s / 25°C, a solid content of 85%±1.5, an acid value of 20-30mgKOH / g, and gelatinization Time: 10-19min. Color: ≤2# (Fe-Co).
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Abstract
The invention relates to the technical field of chemical industry, and particularly discloses a 1,6-hexanediol modified unsaturated polyester and a preparation method thereof, wherein the 1,6-hexanediol modified unsaturated polyester comprises, by weight, 6-10% of neopentyl glycol, 28-32% of maleic anhydride, 0.05-0.1% of an antioxidant, 4-8% of distilled water, 25-30% of an air drying agent, 10-15% of 1,6-hexanediol, 2-4% of 98% pentaerythritol, 0.01-0.03% of methylhydroquinone, 1-2% of toluene, 8-12% of a diluent, and 1-2% of dimethyl carbonate. According to the present invention, with theapplication of the the unsaturated polyester synthesized by using the long molecular chain of 1,6-hexanediol and the allyl ether-containing double bond in dicyclopentadiene in wood lacquers, the flexibility, the leveling property and the cracking resistance of the resin are improved, the softness and the sticking of the surface of the paint film are improved, the air drying performance is improved, the time for the next process of coating is saved so as to improve the production efficiency, and the needs of customers in the market are met.
Description
technical field [0001] The invention relates to the technical field of chemical industry, in particular to a 1,6-hexanediol modified unsaturated polyester and a preparation method thereof. Background technique [0002] Traditional unsaturated polyester has excellent process performance, such as wide processing temperature, light color, etc. The cured unsaturated polyester has good comprehensive properties, good corrosion resistance, electrical properties and good heat resistance, etc. The raw materials used are from a wide range of sources, and the price is cheaper than epoxy resin, but there are also shortcomings, such as large shrinkage during curing, high brittleness of the cured product, and the brittleness of the product makes the impact resistance, cracking resistance and fatigue resistance of the product poor. The surface of the film is soft and has a large contact area with oxygen in the air, resulting in a sticky and rough surface. [0003] In the existing unsatura...
Claims
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Application Information
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