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Imitation marble unsaturated polyester resin and preparation method thereof

A technology of artificial marble and polyester resin, applied in the field of unsaturated polyester resin, can solve the problem of unsaturated polyester resin strength, thermal deformation temperature yellowing resistance, poor water resistance and chemical resistance, unsaturated polyester resin resistance Heat resistance, chemical resistance decline, asymmetric electron cloud distribution of phthalic anhydride, etc., to achieve good hydrolytic stability, low shrinkage, and high cost performance

Active Publication Date: 2010-06-16
浙江天和树脂有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unsaturated polyester resin obtained by this traditional method has poor strength, heat distortion temperature, yellowing resistance, water resistance and chemical resistance, and has many defects.
[0003] 1. Traditional unsaturated polyester resins generally only contain phthalic anhydride and maleic anhydride. Due to the extremely asymmetric electron cloud distribution of phthalic anhydride, the chemical stability is not good. Chemical corrosion resistance is not good on saturated polyester resin
[0004] 2. Traditional unsaturated polyester resins generally contain a large amount of diethylene glycol, which leads to a large amount of ether bonds in unsaturated polyester resins. Due to the particularity of ether bonds, they are unstable when heated and can be combined with Water produces hydrogen bonds, etc., which directly leads to a decrease in the heat resistance and chemical resistance of the unsaturated polyester resin, and also greatly increases the water absorption of the resin.
But it is expensive, and the price of the products produced is too high, which will not be accepted by ordinary customers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 feeds intake by following ratio:

[0025] (1) Propylene Glycol 14%

[0026] (2) Neopentyl Glycol 10%

[0027] (3) Glycerin 4%

[0028] (4) Isophthalic acid 20%

[0029] (5) Phthalic anhydride 14%

[0030] (6) Maleic anhydride 11%

[0031] (7) Styrene 27%

[0032] The preparation method of this artificial marble unsaturated polyester resin comprises the following steps:

[0033] The above raw materials (1)-(4) are added to the reaction pot at one time for polycondensation reaction, with nitrogen protection, after 12 hours of polycondensation, the reaction temperature is controlled at 195-205°C, and the acid value reaches 40±5mgKOH / g. Cool down to 160°C and add raw material (5) and raw material (6) into the synthesis equipment, after 7 hours of polycondensation, the reaction temperature is controlled at 195-205°C, the acid value reaches 60±5mgKOH / g, vacuum treatment under reduced pressure, Keep the vacuum degree ≥ 0.092Mpa, vacuumize for 2-4 hours, and...

Embodiment 2

[0034] Embodiment 2 feeds intake by following ratio:

[0035] (1) Propylene Glycol 7%

[0036] (2) Neopentyl glycol 8%

[0037] (3) Glycerin 3%

[0038] (4) Ethylene glycol 6%

[0039] (5) Isophthalic acid 23%

[0040] (6) Phthalic anhydride 13%

[0041] (7) Maleic anhydride 10%

[0042] (8) Styrene 22%

[0043] (9) Methyl methacrylate 8%

[0044] The preparation method of this artificial marble unsaturated polyester resin comprises the following steps:

[0045] The above-mentioned raw materials (1)-(5) are added to the reaction pot at one time for polycondensation reaction, with nitrogen protection, after 13 hours of polycondensation, the reaction temperature is controlled at 200-205°C and the acid value reaches 50±5mgKOH / g. Cool down to 160°C, add raw material (6) and raw material (7) into the synthesis equipment, after 8 hours of polycondensation, the acid value reaches 60±5mgKOH / g, keep the material temperature at 195-205°C, and keep the vacuum degree ≥0.092 Mpa, ...

Embodiment 3

[0046] Embodiment 3 feeds intake by following ratio:

[0047] (1) Ethylene glycol 9%

[0048] (2) Neopentyl glycol 11%

[0049] (3) Glycerin 5%

[0050] (4) Isophthalic acid 18%

[0051] (5) Phthalic anhydride 12%

[0052] (6) Maleic anhydride 14%

[0053] (7) Styrene 31%

[0054] The preparation method of this artificial marble unsaturated polyester resin comprises the following steps:

[0055]The above raw materials (1)-(4) are added to the reaction pot at one time for polycondensation reaction, with nitrogen protection, after 12 hours of polycondensation, the reaction temperature is controlled at 195-205°C, and the acid value reaches 40±5mgKOH / g. Cool down to 160°C and add raw material (5) and raw material (6) into the synthesis equipment, after 7 hours of polycondensation, the reaction temperature is controlled at 195-205°C, the acid value reaches 60±5mgKOH / g, vacuum treatment under reduced pressure, Keep the vacuum degree ≥ 0.092Mpa, vacuumize for 2-4 hours, and ke...

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PUM

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Abstract

The invention relates to imitation marble unsaturated polyester resin, which is liquid under normal temperature and comprises the following raw materials by weight percent: 10-14% of normal dihydric alcohol, 11-16% of special dihydric alcohol, 18-23% of isophthalic acid, 12-17% of phthalic anhydride, 10-14% of maleic anhydride and 24-31% of diluent. The preparation method comprises the following steps: under the protection of nitrogen, gradually polycondensing dihydric alcohol and isophthalic acid at the temperature of 190-210 DEG C for 10-14h until the acid value reaches 35-55 mgKOH / g, lowering the temperature to 160 DEG C and then adding phthalic anhydride and maleic anhydride to gradually polycondense for 6-8h, when reaction is completed till the acid value reaches 60+ / -5 mgKOH / g, reducing pressure and vacuumizing for 2-4h, then cooling down to 190 DEG C, adding polymerization inhibitor, lowering the temperature to 100-120 DEG C and then adding diluent, evenly stirring to obtain the unsaturated polyester resin.

Description

technical field [0001] The invention belongs to the technical field of unsaturated polyester resin, and in particular relates to an artificial marble unsaturated polyester resin and a preparation method thereof. Background technique [0002] Ordinary artificial marble resins generally use phthalic anhydride, maleic anhydride, propylene glycol, ethylene glycol, and diethylene glycol polycondensation to form linear polymer compounds with ester bonds and unsaturated double bonds. The unsaturated polyester resin obtained by this traditional method has poor strength, heat distortion temperature, yellowing resistance, water resistance and chemical resistance, and has many defects. [0003] 1. Traditional unsaturated polyester resins generally only contain phthalic anhydride and maleic anhydride. Due to the extremely asymmetric electron cloud distribution of phthalic anhydride, the chemical stability is not good. Saturated polyester resins have poor chemical resistance. [0004] ...

Claims

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Application Information

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IPC IPC(8): C08F283/01C08G63/54C08G63/20C08G63/181C04B26/18
Inventor 林定多马勇麻慎荣邱灵强
Owner 浙江天和树脂有限公司
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