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Phosphorous flame-retardant unsaturated polyester resin and preparation method thereof

A polyester resin, unsaturated technology, applied in the field of preparation of unsaturated polyester resin, can solve the problems of flame retardancy and anti-melting droplet performance.

Inactive Publication Date: 2013-09-04
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyester melt viscosity of this technology is not high, and the performance of flame retardancy and anti-droplet is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The preparation steps of phosphorus-containing flame-retardant unsaturated polyester resin are:

[0017] In a 100ml three-necked flask, add maleic anhydride, DOPOMA, phthalic anhydride, ethylene glycol, propylene glycol, diethylene glycol, and xylene. Stirring was started and the temperature was raised slowly. When the temperature is 80°C, the system turns into a light yellow clear liquid. When the temperature reaches 120°C, it takes 20 minutes to raise the temperature to 140°C, and then continue to slowly raise the temperature to 180°C (it takes 1.5 hours). The temperature of the reaction should not exceed 200°C at the end, and keep the temperature until the acid value is lower than 30mgKOH / g. When the acid value reaches a suitable value, the xylene is sucked out, and when the temperature is lowered to 140°C, a polymerization inhibitor is added, and the temperature is continuously stirred to cool down. When the temperature reaches 80°C, add styrene weighed in ad...

Embodiment 1

[0020] Add 13.72 parts of maleic anhydride, 4.71 parts of DOPOMA, 10.36 parts of phthalic anhydride, 4.20 parts of ethylene glycol, 15.40 parts of propylene glycol, 7.20 parts of diethylene glycol, and 2.80 parts of xylene in a 100ml three-necked flask. parts, catalyst 0.0100 parts. Stirring was started and the temperature was raised slowly. When the temperature is 80°C, the system turns into a light yellow clear liquid. When the temperature reaches 120°C, it takes 20 minutes to raise the temperature to 140°C, and then continue to slowly raise the temperature to 180°C (it takes 1.5 hours). The temperature of the reaction should not exceed 200°C at the end, and keep the temperature until the acid value is lower than 30mgKOH / g. When the acid value reaches 10.09 mgKOH / g, the xylene is suction-filtered, and when the temperature is lowered to 140° C., 0.0100 parts of a polymerization inhibitor is added, and the temperature is continuously stirred to cool down. When the tempe...

Embodiment 2

[0022] Add 12.74 parts of maleic anhydride, 9.42 parts of DOPOMA, 9.62 parts of phthalic anhydride, 4.2 parts of ethylene glycol, 15.4 parts of propylene glycol, 7.2 parts of diethylene glycol, and 2.93 parts of xylene in a 100ml three-necked flask. share. Stirring was started and the temperature was raised slowly. When the temperature is 80°C, the system turns into a light yellow clear liquid. When the temperature reaches 120°C, it takes 20 minutes to raise the temperature to 140°C, and then continue to slowly raise the temperature to 180°C (it takes 1.5 hours). The temperature of the reaction should not exceed 200°C at the end, and keep the temperature until the acid value is lower than 30mgKOH / g. When the acid value reaches 22.4 mgKOH / g, the xylene is sucked off, and when the temperature is lowered to 140° C., 0.1172 parts of polymerization inhibitor is added, and the temperature is continuously stirred and lowered. When the temperature reaches 80°C, add 14.64 parts...

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PUM

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Abstract

The invention discloses phosphorous flame-retardant unsaturated polyester resin and a preparation method thereof. A formula of the phosphorous flame-retardant unsaturated polyester resin comprises the following components in percentage by weight: 18.39%-25.04% of maleic anhydride, 8.47%-25.35% of DOPOMA (2-[10-(9,10-dihydro-9-oxa-10-phosphaphenantrene-10-oxide-10-yl)] maleic acid), 13.45%-18.91% of phthalic anhydride, 6.80%-7.70% of glycol, 24.26%-27.70% of propylene glycol, 11.75%-12.95% of diethylene glycol, 5.1%-7% of a water-carrying agent, 0.02% of a catalyst, 0.02% of a polymerization inhibitor, 25%-35% of a cross-linking agent, and 25%-35% of a diluent. The preparation method of the polyester resin comprises the steps of synthesizing the raw material DOPOMA with DOPO and MA at a molar ratio of 1:1.05, adding maleic anhydride, phthalic anhydride, glycol, propylene glycol and diethylene glycol, and directly synthesizing the flame-retardant unsaturated polyester resin with a one-step method.

Description

technical field [0001] The invention relates to the preparation technology of unsaturated polyester resin. Background technique [0002] Unsaturated polyester resin is the most commonly used resin in reinforced plastics. In the field of reinforced plastics, the amount of thermosetting resin accounts for about 75%. There are many kinds of thermosetting resins, and the amount of unsaturated polyester resin is far more than other resins, because unsaturated polyester resin has particularly favorable processing conditions and is cheap. For example, although the price of phenolic resin is lower than that of polyester, it needs to discharge water and form steam during processing and curing. It must adopt higher molding pressure (generally 8-30MPa) and heating conditions, so a larger press is required for production. . Unsaturated polyester resin does not discharge moisture and other by-products during processing and curing, so it can be molded at lower pressure and temperature....

Claims

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Application Information

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IPC IPC(8): C08G63/692C08F283/01
Inventor 周应萍陈碧碧杨保平郭军红崔锦峰李敏睿倾彩霞崔卓魏小赟包雪梅常洲张皓钧
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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