Polyvinyl chloride heat stabilizer, its preparation method and its application

A technology of polyvinyl chloride and heat stabilizer, applied in the field of new polyvinyl chloride heat stabilizer and its preparation, can solve the problems of high cost of organotin heat stabilizer, soaring metal tin price, easy dust flying, etc. The effect of stable efficiency, low cost and high thermal stabilization efficiency

Active Publication Date: 2014-06-18
CHANGJI XINMINGTAI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the soaring price of the raw material tin on the one hand, the cost of the organotin heat stabilizer is high; toxicity, which limits its application

Method used

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  • Polyvinyl chloride heat stabilizer, its preparation method and its application
  • Polyvinyl chloride heat stabilizer, its preparation method and its application
  • Polyvinyl chloride heat stabilizer, its preparation method and its application

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0040] Into a 250ml three-necked flask equipped with a reflux device with an oil bath temperature of 50°C, nitrogen was introduced to remove air, and then 22.5g (0.216mol) of styrene and 9.7g (0.0279mol) of dibutyltin maleate were added, and stirring was started. After dissolving into a translucent solution, add 1.7g (which contains equivalent to 0.03mol of butadiene monomer) of liquid polybutadiene (average molecular weight 1×10 3 ) into the flask, stir evenly, add 0.25g initiator (azobisisobutyronitrile), raise the temperature to 75°C, and stop the reaction for 6h after polymerization. A translucent viscous substance was obtained, diluted with 50 ml of benzene, and the reaction product was poured into a beaker containing 400 ml of methanol solution containing 0.8% hydroquinone polymerization inhibitor for precipitation. The precipitate was dissolved in benzene and then precipitated with methanol. Unreacted monomers are removed. The product was put into an electric heating c...

preparation Embodiment 2

[0042] Into a 250ml three-necked flask equipped with a reflux device with a set oil bath temperature of 50°C, nitrogen was introduced to remove the air, then 31.2g (0.3mol) of styrene and 16g (0.035mol) of dioctyltin maleate were added, and the stirrer was started. , after dissolving into a translucent solution, add 2.7g (which contains butadiene monomer equivalent to 0.05mol) liquid polybutadiene (average molecular weight 1×10 3 ) and the initiator benzoyl peroxide 0.54g, heat up to 95 °C for 8 hours to stop the reaction and obtain a translucent viscous substance. After diluting with 50ml benzene, pour the reaction product into a 400ml container containing 0.8% hydroquinone for polymerization inhibition. Precipitate in a beaker of methanol solution of the reagent, dissolve the precipitate with benzene, and then precipitate with methanol to remove unreacted monomers. The product was put into an electric heating constant temperature blast drying oven at 60°C for drying for 48 h...

preparation Embodiment 3

[0044] Into a 250ml three-necked flask equipped with a reflux device with a set oil bath temperature of 50°C, nitrogen was introduced to remove air, then 31.2g (0.3mol) of styrene and 17.4g (0.05mol) of dibutyltin maleate were added, and stirring was started. 18ml containing 2.76g (which contains the equivalent of 0.05mol of butadiene monomer) polybutadiene (average molecular weight 4.0 × 10 5 ) tetrahydrofuran solution (pre-dissolved) was added to the flask, 0.25g of initiator (azobisisobutyronitrile) was added, stirred until it became translucent, the temperature was raised to 85 °C, and a translucent viscose was obtained after constant temperature polymerization for 10 hours. Thick material, diluted with 50ml of benzene, poured the reaction product into a beaker containing 400ml of methanol solution containing 0.8% hydroquinone polymerization inhibitor to precipitate, the precipitate was dissolved with benzene, and then precipitated with methanol to remove unreacted monomer...

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Abstract

The invention discloses a polyvinyl chloride heat stabilizer. The polyvinyl chloride heat stabilizer is a tin-containing ternary grafted copolymer type heat stabilizer, and is a polymer with the structure represented by formula (I) in the specification; and in the formula (I), the molar ratio of x:y:z is (0.5-2):(1-10):(0.5-1), and R1 and R2 are -CH3, -C2H5, -C3H7, -C4H9, -C5H11, -C6H5, -C6H13, -C7H15 or -C8H17. A preparation method of the polyvinyl chloride heat stabilizer comprises the following steps: adding certain parts of styrene, dialkyltin maleate and polybutadiene to a reactor provided with a stirring reflux device, stirring to dissolve, adding an initiator, and polymerizing at 70-130DEG C for 2-12h to obtain the polyvinyl chloride heat stabilizer. The polyvinyl chloride heat stabilizer disclosed in the invention has the advantages of high heat stabilization efficiency, nontoxicity, low cost, and substantial improvement of the impact strength of polyvinyl chloride products when the polyvinyl chloride heat stabilizer used in polyvinyl chloride.

Description

(1) Technical field [0001] The invention relates to a novel polyvinyl chloride heat stabilizer and its preparation method and application, in particular to a high molecular heat stabilizer used in PVC plastic processing and its preparation process. This heat stabilizer is used in PVC plastic processing to enhance the impact strength of PVC. (2) Background technology [0002] Polyvinyl chloride (PVC) is widely used in insulating materials, packaging, building materials and daily-use plastic products because of its low price and excellent performance. In recent years, my country's total demand for PVC is still showing a steady growth trend. However, due to structural defects in the PVC molecular chain, hydrogen chloride will be released when heated to 110°C, and the released hydrogen chloride will accelerate the decomposition of PVC. Therefore, PVC will decompose obviously when the processing temperature is 160-200°C, causing discoloration of the product and a decline in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L51/06C08F279/02C08F2/02
Inventor 刘建平宋霞周淑美
Owner CHANGJI XINMINGTAI NEW MATERIAL TECH
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