Modified molecular sieve heat stabilizer for PVC and preparation method thereof

A technology of heat stabilizer and molecular sieve, which is applied in the field of heat stabilizer for modified molecular sieve PVC and its preparation, which can solve the problems of reducing long-term heat stability and achieve good initial colorability, difficulty in precipitation, and good mutual solubility.

Inactive Publication Date: 2016-07-13
淄博龙沙高分子材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantage is that it will absorb a large amount of water if it is placed in the air for a long time, which will reduce its long-term thermal stability and make it unable to complete the function of absorbing HCl, so it needs to be treated in the process of PVC processing.

Method used

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  • Modified molecular sieve heat stabilizer for PVC and preparation method thereof
  • Modified molecular sieve heat stabilizer for PVC and preparation method thereof
  • Modified molecular sieve heat stabilizer for PVC and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The thermal stabilizer for modified molecular sieve PVC is composed of the following raw materials in parts by mass:

[0021]

[0022]

[0023] The inorganic carrier is zeolite.

[0024] The reducing agent is glucose.

[0025] Described modified molecular sieve is prepared according to the following steps:

[0026] The 4A type molecular sieve is subjected to high-temperature dehydration treatment at a temperature of 350°C; the high-temperature-treated molecular sieve and aluminate are weighed at a mass ratio of 100:5.5, put into a high-speed mixer and mixed, heated to 80-100°C, and reacted After 1 hour, the material was taken out and cooled, and crushed to obtain a new modified molecular sieve.

[0027] The lubricant is polyethylene wax.

[0028] The auxiliary heat stabilizer is dibenzoylmethane, stearoylbenzoylmethane, pentaerythritol ester or phosphite.

Embodiment 2

[0030] The thermal stabilizer for modified molecular sieve PVC is characterized in that it consists of the following raw materials in parts by mass:

[0031]

[0032] The inorganic carrier is layered phosphate.

[0033] The reducing agent is formic acid.

[0034] Described modified molecular sieve is prepared according to the following steps:

[0035] The 4A type molecular sieve is subjected to high-temperature dehydration treatment at a temperature of 350°C; the high-temperature-treated molecular sieve and aluminate are weighed at a mass ratio of 100:5.5, put into a high-speed mixer and mixed, heated to 80-100°C, and reacted After 1 hour, the material was taken out and cooled, and crushed to obtain a new modified molecular sieve.

[0036] Described lubricant is stearic acid.

[0037] The auxiliary thermal stabilizer is pentaerythritol ester.

Embodiment 3

[0039] The thermal stabilizer for modified molecular sieve PVC is characterized in that it consists of the following raw materials in parts by mass:

[0040]

[0041] The inorganic carrier is zeolite.

[0042] The reducing agent is formic acid.

[0043] Described modified molecular sieve is prepared according to the following steps:

[0044] The 4A type molecular sieve is subjected to high-temperature dehydration treatment at a temperature of 350°C; the high-temperature-treated molecular sieve and aluminate are weighed at a mass ratio of 100:5.5, put into a high-speed mixer and mixed, heated to 80-100°C, and reacted After 1 hour, the material was taken out and cooled, and crushed to obtain a new modified molecular sieve.

[0045] Described lubricant is stearic acid.

[0046] Described auxiliary thermal stabilizer is stearyl benzoyl methane.

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Abstract

The invention relates to a modified molecular sieve heat stabilizer for PVC (polyvinyl chloride) and a preparation method thereof, and belongs to the technical field of chemical industry. The heat stabilizer comprises the following raw materials by the mass percentage: 10-40 parts of calcium stearate, 10-20 parts of an inorganic carrier, 20-40 parts of zinc stearate, 10-20 parts of a modified molecular sieve, 5-10 parts of a reducing agent, 1-5 parts of a lubricant, and 1-5 parts of an auxiliary heat stabilizer. A prepared novel molecular sieve is good in effect, and good in intersolubility with an organic solvent; and as a stabilizer for processing plastics such as PVC, the heat stabilizer has the characteristics of being hardly to precipitate and good in stabilization effect. Through the addition of the prepared novel molecular sieve, the processing performance is improved, and the cost is reduced. Through carrying out static aging experiments on PVC into which the novel modified molecular sieve composite heat stabilizer is added, results show that the added composite stabilizer disclosed by the invention can significantly improve the heat stability of PVC.

Description

technical field [0001] The invention relates to a heat stabilizer for modified molecular sieve PVC and a preparation method thereof, belonging to the technical field of chemical industry. Background technique [0002] As we all know, PVC is easy to decompose under processing temperature conditions, and a stabilizer must be added to make it process smoothly. In addition, when polyvinyl chloride is heated or exposed to ultraviolet radiation, it will also cause polymer degradation and de-HCl. Therefore, the use and processing of PVC must use stabilizers. Stabilizer is a chemical additive that can inhibit the degradation and discoloration of PVC caused by heat and light during processing and use. Stabilizers can be divided into five categories according to their chemical structures: base lead salt stabilizers, metal soaps, organotin compounds, organic stabilizers and composite stabilizers. [0003] Nowadays, lead salt stabilizer is still the first choice heat stabilizer in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/06C08K9/04C08K3/34C08K5/098C08K3/32
Inventor 沙作宏
Owner 淄博龙沙高分子材料科技有限公司
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