Application of trisodium cyanurate in improving the heat stability of PVC and composite heat stabilizer containing trisodium cyanurate

A composite heat stabilizer, trisodium cyanurate technology, applied in the field of trisodium cyanurate, can solve the problems of limitations, insignificant synergistic effect, and difficult availability of raw materials for the preparation of lanthanum cyanurate, so as to improve weather resistance and thermal stability properties, the effect of inhibiting zinc burning phenomenon

Active Publication Date: 2017-12-01
济南金昌树新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to zinc cyanurate and lead cyanurate, it has also been reported that lanthanum cyanurate also has an effect on the thermal stability of PVC, such as the literature "Synthesis of lanthanum cyanurate and its research on the thermal stability of PVC" (Wang Mei et al., Plastic Science and Technology, In April 2012, the fourth issue of volume 10) disclosed lanthanum cyanurate and its thermal stability to PVC. The results showed that lanthanum cyanurate alone can improve the thermal stability of PVC, but it has a synergistic effect when combined with zinc stearate. not obvious
At present, it is only mentioned that the lead salt, zinc salt, and lanthanum salt of cyanuric acid can improve the thermal stability of PVC, and there are no related reports on other cyanuric acid salts.
And, although the thermostabilizer that adds zinc cyanurate (lead, lanthanum) can prolong the thermostability time of PVC, improve initial whiteness, because lead cyanurate contains toxic heavy metal, the preparation raw material of lanthanum cyanurate is difficult to obtain and with other composition The compounding effect is not strong, and the application is limited

Method used

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  • Application of trisodium cyanurate in improving the heat stability of PVC and composite heat stabilizer containing trisodium cyanurate
  • Application of trisodium cyanurate in improving the heat stability of PVC and composite heat stabilizer containing trisodium cyanurate
  • Application of trisodium cyanurate in improving the heat stability of PVC and composite heat stabilizer containing trisodium cyanurate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Prepare trisodium cyanurate as follows:

[0033] 1. Add 40g of cyanuric acid and 160g of water to the four-necked flask in turn, start stirring and heat up;

[0034] 2. Dissolve 37.2g of sodium hydroxide in 37g of water and stir with a glass rod until completely dissolved;

[0035] 3. When the temperature in the four-necked bottle rises to 55-60°C, pour the completely dissolved sodium hydroxide aqueous solution into the bottle in 3-4 times;

[0036]4. When the temperature is stabilized at 65-70°C, control the temperature and react for 2 hours. After the reaction is complete, stop heating. After the reaction slurry is cooled to below 48°C, filter the slurry under reduced pressure, dry and pulverize That is, trisodium cyanurate.

[0037] 5. The filtrate and washing liquid in the suction filtration process are recycled and used as reaction water for the preparation of the next batch of trisodium cyanurate.

[0038] Using the same method as above, replace sodium hydroxid...

Embodiment 2

[0049] In order to test the effect difference of the amount of trisodium cyanurate on the thermal stability of PVC, a composite heat stabilizer is prepared according to the formula in the following table 3, and the composite heat stabilizer weighs each raw material according to the amount in table 3, and then each raw material Mix well and serve.

[0050] table 3

[0051]

[0052] Mix the above-mentioned groups of composite heat stabilizers with 1000g of PVC resin respectively, mix the obtained mixture with a high-speed mixer at 110°C, press it with a double-roller machine at 185°C, cut into pieces after 7 minutes, and cut into pieces at 195°C Put it into a constant temperature aging box for testing, cut the pieces every 5 minutes, and observe the static color change of the cut pieces. At the same time, the mixed material is pressed into tablets with a rheometer, and the color of the extruded tablets is measured. The instrument used for color measurement is a colorimeter, ...

Embodiment 3

[0059] Accurately weigh zinc stearate, hydrotalcite, zeolite, trisodium cyanurate and other additives according to Table 5 below, wherein the other additives are a mixture of PE, β-diketone and calcium carbonate. Mix all components evenly to obtain a composite thermal stabilizer.

[0060] table 5

[0061]

[0062]

[0063] Take samples of each composite heat stabilizer and mix them with 1000g of PVC resin. The resulting mixture is mixed with a high-speed mixer at 110°C, pressed at 185°C with a double-roller machine, cut into pieces after 7 minutes, and cut into pieces at 195°C. Put it into a constant temperature aging box for testing, cut the pieces every 5 minutes, and observe the static color change of the cut pieces. At the same time, the mixed material is pressed into tablets with a rheometer, and the color of the extruded tablets is measured. The instrument used for color measurement is a colorimeter, which is represented by L, a, and b. The discoloration of each ...

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Abstract

The invention discloses application of trisodium cyanurate to the increasing of PVC thermostability and a composite heat stabilizer containing the trisodium cyanurate. The trisodium cyanurate can be used for assisting a heat stabilizer and can increase the thermostability of PVC during processing when being combined with the heat stabilizer containing zinc during use. When the trisodium cyanurate is combined with the heat stabilizer containing zinc during use, the thermostability of the PVC during processing can be increased, product weather resistance can be increased, and 'zinc burning' can be inhibited at the same time. The composite heat stabilizer formed by the trisodium cyanurate and the heat stabilizer containing zinc keeps the advantages of nontoxicity and environment protection of the heat stabilizer containing zinc, satisfies the requirement of environment protection and is suitable for being popularized and used.

Description

technical field [0001] The present invention relates to a new use of trisodium cyanurate, in particular to its new use in improving the thermal stability of PVC processing. The invention also relates to a composite heat stabilizer containing trisodium cyanurate. Background technique [0002] Polyvinyl chloride (PVC) has been widely used in the field of life due to its excellent performance, low price, high strength, and strong corrosion resistance. Its consumption is second only to polyethylene, and it belongs to the second largest category of plastic products. However, due to the molecular structure of polyvinyl chloride itself, it is not stable at high temperature, and the degradation reaction of removing hydrogen chloride is prone to occur at high temperature, forming a double bond to initiate and continue through the zipper mechanism to form a polyene sequence. Polyene sequences containing 7 or more conjugated double bonds are chromophores and cause common fading or yell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K13/04C08K5/3492C08K5/098C08K3/34C08K7/26
CPCC08K3/34C08K5/098C08K5/3492C08K7/26C08K13/04C08L27/06C08L2201/08
Inventor 屈勇潘奇伟
Owner 济南金昌树新材料科技有限公司
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