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Preparing method for styrene-free low-volatile-matter unsaturated polyester resin

A manufacturing method and low volatile technology, applied in the direction of coating, etc., can solve the problems of styrene hazards, etc., and achieve the effects of avoiding waste, solving hazards, and low chemical resistance

Inactive Publication Date: 2016-05-11
HUNAN JINHAI SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned technical shortcomings, the present invention provides a method for manufacturing styrene-free low volatile unsaturated polyester resin without using styrene during processing and fundamentally solving the problem of styrene hazards

Method used

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  • Preparing method for styrene-free low-volatile-matter unsaturated polyester resin
  • Preparing method for styrene-free low-volatile-matter unsaturated polyester resin

Examples

Experimental program
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Effect test

Embodiment 1

[0018] (1) Add 350 grams of ethylene glycol, 321 grams of maleic anhydride, 208 grams of phthalic anhydride, and 137 grams of dicyclopentadiene into a 1000ML reactor equipped with inert gas protection, agitator, thermometer, and fractionating column device , hydroquinone 0.08 g; (2), pass nitrogen gas to remove the air in the reactor; (3), start stirring, raise the temperature to 80-90°C for one hour, slowly raise the temperature, and control the heating rate of 10°C / 10 minutes , raise the temperature to 160°C for pre-polymerization for one hour, control the outlet temperature of the reflux condensation water separator below 102°C, raise the temperature to 200°C for polycondensation and water separation for 5-7 hours, when the acid value of the resin drops to 50mgKOH / g, raise the temperature to 210°C to continue the reaction One hour; (4), check that the acid value is less than 40mgKOH / g, cool down to 100°C, add 380 grams of dipropylene glycol diacrylate, mix well, cool and dis...

Embodiment 2

[0020] (1) Add 175 grams of ethylene glycol, 214.5 grams of propylene glycol, 321 grams of maleic anhydride, 208 grams of phthalic anhydride, and 137 grams of diene, 0.08 grams of hydroquinone; (2), pass nitrogen to remove the air in the reactor; (3), start stirring, raise the temperature to 80-90°C for one hour, slowly raise the temperature, control 10 degrees / 10 The heating speed is 1 minute, the temperature is raised to 160°C for one hour pre-polymerization, the outlet temperature of the reflux condensation water separator is controlled below 102°C, the temperature is raised to 200°C for polycondensation and water separation for 5-7 hours, when the acid value of the resin drops to 50mgKOH / g, the temperature rises Continue to react at 210°C for one hour; (4), detect that the acid value is less than 40mgKOH / g, cool down to 100°C, add 340 grams of dipropylene glycol diacrylate and 40 grams of trimethylolpropane triacrylate, mix well, and cool and discharge The styrene-free low...

Embodiment 3

[0022] (1) Add 175 grams of ethylene glycol, 214.5 grams of propylene glycol, 272 grams of maleic anhydride, 282 grams of phthalic anhydride, and 149 grams of diene, 0.12 grams of hydroquinone; (2), pass nitrogen to remove the air in the reactor; (3), start stirring, raise the temperature to 80-90°C for one hour, slowly raise the temperature, control 10 degrees / 10 The heating speed is 1 minute, the temperature is raised to 160°C for one hour pre-polymerization, the outlet temperature of the reflux condensation water separator is controlled below 102°C, the temperature is raised to 200°C for polycondensation and water separation for 5-7 hours, when the acid value of the resin drops to 50mgKOH / g, the temperature rises Continue to react at 210°C for one hour; (4), detect that the acid value is less than 40mgKOH / g, cool down to 100°C, add 340 grams of dipropylene glycol diacrylate and 40 grams of trimethylolpropane triacrylate, mix well, and cool and discharge The styrene-free low...

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Abstract

The invention discloses a preparing method for a styrene-free low-volatile-matter unsaturated polyester resin. The preparing method is characterized by comprising the following steps: (1) adding dihydroxy alcohol, saturated and unsaturated diacid / dianhydride, dicyclopentadiene and a polymerization inhibitor according to a proportion; (2) introducing an inert gas nitrogen or carbon dioxide to remove air from a reactor; (3) starting stirring, raising the temperature to 80-90 DEG C, keeping a reaction for 1 hour, then slowly raising the temperature by controlling the temperature raising rate to be 10 DEG C per 10 minutes until the temperature reaches 160 DEG C, carrying out prepolymerization for 1 hour, controlling the temperature at a reflux condensed water knockout drum outlet to be 102 DEG C or lower, then raising the temperature to 200 DEG C, carrying out polycondensation and water knockout for 5-7 hours, raising the temperature to 210 DEG C when the resin acid value is reduced to 50 mgKOH / g, and continuing to react for 1 hour; (4) when the acid value is detected to be lower than 40 mgKOH / g, reducing the temperature to 100 DEG C, adding acrylate monomers for dilution, mixing uniformly, cooling, and then discharging. The styrene-free low-volatile-matter unsaturated polyester resin disclosed by the invention can be widely applied to prepare unsaturated polyester coating, and is free of styrene, so that the harm caused by styrene is overcome fundamentally.

Description

technical field [0001] The invention belongs to the technical field of polymer material manufacturing, and in particular relates to a method for manufacturing styrene-free low volatile unsaturated polyester resin. Background technique [0002] Unsaturated polyester refers to the polyester containing unsaturated double bonds in the main chain of the molecule, which is generally polymerized by saturated diols and saturated and unsaturated acids or anhydrides. Unsaturated polyester uses the double bonds on its main chain and the double bonds of cross-linking monomers (such as styrene) to initiate polymerization, cross-linking and curing by active species generated by free radical initiators. Unsaturated polyester paint made of unsaturated polyester, it can be made into solvent-free paint, a thicker paint film can be obtained by one brushing, it does not require high coating temperature, and it has a good decorative effect, and the paint film is tough and durable Grinding, easy...

Claims

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Application Information

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IPC IPC(8): C08F283/01C08F222/14C08G63/52C09D151/08
Inventor 刘立新唐慧敏黄利勇
Owner HUNAN JINHAI SCI & TECH
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