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Rare-earth composite heat stabilizer for hard PVC (Polyvinyl Chloride)

A heat stabilizer and rare earth composite technology, applied in the field of rare earth composite heat stabilizers for rigid PVC, to achieve the effect of improved initial coloring, low price, and less dosage

Active Publication Date: 2015-03-25
河北拓春采暖设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the defects of the single rare earth heat stabilizer for PVC proposed in the background technology, and provides a rare earth composite heat stabilizer for rigid PVC with excellent thermal stability, low cost, non-toxic and environment-friendly

Method used

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  • Rare-earth composite heat stabilizer for hard PVC (Polyvinyl Chloride)
  • Rare-earth composite heat stabilizer for hard PVC (Polyvinyl Chloride)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix 500 g of PVC and 25 g of the heat stabilizer of the present invention (including 1.5 g of lanthanum myristate compound, 5.5 g of calcium stearate, 9 g of zinc stearate, and 9 g of pentaerythritol) and enter the working temperature at 20-30 Stir in a stirring machine at ℃ for 60-90 minutes, and the stirring speed is 1500±20 rpm. According to GB / T2917-2002, conduct the Congo red experiment, record the time when the Congo red test paper starts to turn blue, which is the static thermal stability time, expressed in minutes (min). Take the average value of 3 parallel measurements, and observe the discoloration of the sample every 10 minutes. The rheological properties of the material were tested with a torque rheometer at a rotational speed of 35 r / min and a material temperature of 180°C. The average value was obtained by parallel determination 3 times. Using an electronic universal testing machine, refer to GB / T1041-2006, GB / T9341-2000, GB / T1043-1996 respectively, test...

Embodiment 2

[0024] Mix 500g of PVC and 25g of the heat stabilizer of the present invention (including 1.5g of cerium myristate compound, 5.5g of calcium stearate, 9g of zinc stearate, and 9g of pentaerythritol) and enter the mixing machine with an operating temperature of 20-30°C Stir for 60-90 minutes in the medium, and the stirring speed is 1500±20 rpm. According to GB / T2917-1982, conduct the Congo red experiment, record the time when the Congo red test paper starts to turn blue, which is the static thermal stability time, expressed in minutes (min). Take the average value of 3 parallel measurements, and observe the discoloration of the sample every 10 minutes. The rheological properties of the material were tested with a torque rheometer at a rotational speed of 35 r / min and a material temperature of 180°C. The average value was obtained by parallel determination 3 times. Using an electronic universal testing machine, refer to GB / T1041-2006, GB / T9341-2000, GB / T1043-1996 respectively,...

Embodiment 3

[0026] Mix 500g of PVC and 25g of heat stabilizer of the present invention (including 1.5g of neodymium myristate compound, 5.5g of calcium stearate, 9g of zinc stearate, and 9g of pentaerythritol) and enter into a stirring machine with an operating temperature of 20-30°C Stir for 60-90 minutes in the medium, and the stirring speed is 1500±20 rpm. According to GB / T2917-1982, conduct the Congo red experiment, record the time when the Congo red test paper starts to turn blue, which is the static thermal stability time, expressed in minutes (min). Take the average value of 3 parallel measurements, and observe the discoloration of the sample every 10 minutes; use a torque rheometer to test the rheological properties of the material, with a rotational speed of 35r / min and a material temperature of 180°C. The average value was obtained by parallel determination 3 times. Using an electronic universal testing machine, refer to GB / T1041-2006, GB / T9341-2000, GB / T1043-1996 respectively,...

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Abstract

The invention relates to a rare-earth composite heat stabilizer for hard PVC (Polyvinyl Chloride). The heat stabilizer is a composite prepared from the following components in parts by weight: 5-40 parts of carboxylic acid and rare earth compound, 2-25 parts of calcium stearate, 15-40 parts of zinc stearate and 30-55 parts of pentaerythritol. The rare-earth composite heat stabilizer is a rare earth composite carboxylic heat stabilizer applicable to the hard PVC, not only can overcome the defects of large toxicity, poor heat stability in the preliminary stage, low speed and the like in the traditional heat stabilizer, but also has the advantages that the long-term stability and the preliminary stainability of the PVC are enhanced, the stabilizer is non-toxic and environmental friendly, the energy consumption is low, the using amount is small, costs are low, and the industrial application prospect is wide..

Description

technical field [0001] The invention belongs to the field of polymer material molding and processing, and specifically relates to a rare earth composite heat stabilizer for rigid PVC. Background technique [0002] Polyvinyl chloride (PVC) is one of the plastic varieties with the largest output and the widest application in my country. However, due to the poor thermal stability of PVC itself, a certain amount of thermal stabilizer must be added during the molding process. Traditional PVC heat stabilizers include lead salts, metal soaps, and organotin heat stabilizers. Most of them have good thermal stability efficiency, but they are highly toxic and prone to sulfuration pollution. They are gradually being replaced by new non-toxic rare earths. replaced by heat stabilizers. Existing rare earth heat stabilizers are single rare earth heat stabilizers based on oxides, chlorides and organic acid salts such as lanthanum, cerium, praseodymium, and neodymium. Due to the high activa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K5/098C08K5/053
Inventor 张宁李先铭苏桂仙李德玲
Owner 河北拓春采暖设备有限公司