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Phosphorus-series reaction-type flame-retardant unsaturated polyester resin

A reactive flame retardant and polyester resin technology, applied in the field of polyester resin, can solve the problems of losing market position, high price, insufficient strength, etc., and achieve the effect of good curing performance, cheap price and good flame retardant effect

Inactive Publication Date: 2013-11-13
NANTONG TIANHE RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the synergistic flame retardant effect of phosphorus, nitrogen and silicon is relatively good, the nitrogen-containing diluent trienyl methyl triisocyanurate is likely to affect the curing of the resin when used, resulting in poor curing, insufficient strength and trienyl methyl triisocyanurate. Triisocyanurate, diphenyl dihydroxy silane, and dihydroxy dimethyl silane are very expensive. Although the flame retardant resin synthesized has good flame retardant effect, the price will be very high. Burning resin will lose its market position

Method used

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  • Phosphorus-series reaction-type flame-retardant unsaturated polyester resin
  • Phosphorus-series reaction-type flame-retardant unsaturated polyester resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 228.48 grams (3.00mol) of propylene glycol, 388.98 grams (6.27mol) of ethylene glycol, 182.65 grams (1.23mol) of phthalic anhydride, and 429.73 g (4.38 mol) of dianhydride, gradually raise the temperature to 210°C, control the head temperature below 102°C, conduct polycondensation reaction for 6-8 hours until the shrinkage is 80.8-85.8g, cool down to 160°C, add methylphosphoric acid Dimethyl ester 370.28 grams (2.98mol) and catalyst dibutyltin oxide 1.6g, react at 160°C for 4-5 hours, until the amount of methanol released is 90.6-95.36g, then gradually increase the material temperature, at 180-190°C React for 3-4 hours, then react under reduced pressure for 2-3 hours at a vacuum degree below -0.095mPa.s, add 0.2g of hydroquinone after the vacuum is released, cool down to 120°C, and add 700g of diluent styrene After diluting and stirring evenly, add 3.7 grams of methyl 2-hydroxybenzoate and 3.7 grams of 2,2-dihydroxy-4,4-dimethoxybenzophenone to obtain a transparent ...

Embodiment 2

[0032] Add 211.88 grams (2.78mol) of propylene glycol, 360.32 grams (5.81mol) of ethylene glycol, 169.35 grams (1.14mol) of phthalic anhydride, 398.51 g (4.06 mol) of dianhydride, gradually increase the temperature to 210°C, control the head temperature below 102°C, conduct polycondensation for 6-8 hours until the shrinkage is 74.88-79.56g, then cool down to 160°C, add ethyl phosphoric acid Diethyl ester 459.95 grams (2.77mol) and catalyst dibutyltin oxide 1.6g, reacted 4-5 hours at 160 ℃, after the ethanol amount that deviates is 121.05-127.42g, raise material temperature gradually, at 180-190 ℃ reaction for 3-4 hours, and then under the vacuum degree below -0.095mPa.s, vacuum pressure reduction reaction for 2-3 hours, after the vacuum is released, add 0.2g hydroquinone, cool down to 120 ℃, add diluent styrene 700 Dilute with 1 gram, stir evenly, add 3.7 grams of 2-hydroxybenzoic acid methyl ester and 3.7 grams of 2,2-dihydroxy-4,4-dimethoxybenzophenone to obtain transparent ...

Embodiment 3

[0034] Add 425.07 grams (5.59mol) of propylene glycol in the 2L four-necked flask that is equipped with stirrer, thermometer and rectifying tower, 278.80 grams (2.68mol) of neopentyl glycol, 182.67 grams (1.10mol) of isophthalic acid, be warming up gradually to 210°C, the temperature of the distillation head is controlled below 102°C, the polycondensation reaction is 6-8 hours, and after the shrinkage is 19.8-23.8g, the temperature is lowered to 160°C, and 383.23 grams (3.91mol) of maleic anhydride is added, and the temperature is gradually raised to 210°C, the temperature of the distillation head is controlled below 102°C, and the polycondensation reaction is carried out for 4 hours. After the shrinkage is 68.2-73.6g, the temperature is lowered to 160°C, and 330.22 grams (2.66mol) of dimethyl methyl phosphate and the catalyst dibutyl Tin oxide 1.6g, react at 160°C for 4-5 hours, until the amount of methanol released is 90.6-95.36g, then gradually increase the material temperat...

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PUM

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Abstract

The invention relates to a phosphorus-series reaction-type flame-retardant unsaturated polyester resin. The resin is prepared by steps of subjecting a diol and a diacid or a binary anhydride to polycondensation to synthesize a polyhydroxy unsaturated polyester; then adding a phosphate ester; performing an alcoholysis reaction in the presence of a catalyst and at a certain temperature; increasing the temperature, after the reaction reaches a certain degree, to react continually for a certain period; cooling and adding a diluent for dilution; and adding a light stabilizer, after dilution is finished, to obtain the resin. The resin is advantageous in that phosphorus is introduced to the polyester molecular chains through the alcoholysis reaction, thus achieving a good flame retardant effect; the resin is free from halogen; the resin has good solidifying performance; the surface is not liable to stick after being solidified; and the resin has high mechanical strength after being solidified. The resin has a good flame retardant effect and a low fuming amount when being used for preparing glass fiber reinforced plastic products or refractory coatings.

Description

technical field [0001] The invention relates to the field of polyester resins, in particular to a phosphorus-based reactive flame-retardant unsaturated polyester resin. Background technique [0002] At present, unsaturated polyester resins are widely used in vehicles, building materials, aerospace, electronic appliances and other fields, and higher requirements are put forward for the flame retardancy of materials in many places. Currently on the market are either halogen-containing reactive flame retardant resins, or the so-called flame retardant resins that are added with aluminum hydroxide, triethyl phosphate, trichloroethyl phosphate, dimethyl methyl phosphate, and diethyl ethyl phosphate. Environment-friendly low-smoke flame-retardant resin. The former flame-retardant resin generally has good flame-retardant effect and lasts for a long time. The flame retardant is not easy to separate out and has high mechanical strength. The hydrogen halide gas produced is acidic and ...

Claims

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Application Information

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IPC IPC(8): C08G63/692C08G63/52C08F283/01
Inventor 陈志祥何炜马勇
Owner NANTONG TIANHE RESIN
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