Manufacturing process of pvc internal lubricant

An internal lubricant and manufacturing process technology, applied in the field of plastics, can solve the problems of poor impact resistance, decreased flexibility of PVC, poor stability of PVC, etc., and achieves high thermal stability, low migration, and strong slip resistance. Effect

Active Publication Date: 2011-12-14
夏瑭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Because of the inherent molecular structure and polymerization method of polyvinyl chloride, if it is directly used as the only raw material to produce plastic products, its chemical and physical properties have great defects: for example: polyvinyl chloride has poor stability to light and heat
When heated, it decomposes toxic hydrogen chloride gas and changes color. The tight outer line and oxygen in sunlight will cause photooxidative decomposition of polyvinyl chloride, thus reducing the flexibility of polyvinyl chloride and finally becoming brittle.
The impact resistance of polyvinyl chloride is poor, and the cold resistance is not ideal. The lower limit of the use temperature of rigid polyvinyl chloride plastic is -15 ℃, and that of soft polyvinyl chloride plastic is -30 ℃, which obviously cannot meet the needs of polyvinyl chloride products in life. Neutralizing the requirements for use in industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Step 1: Prepare ethylene glycol and pentaerythritol in proportion, add tetrabutyl titanate as a catalyst, stir for 10-15 minutes, and polymerize at 180°C for 5 hours;

[0045] Step 2: adding vegetable fatty acid to the product of step 1 for 9 hours of esterification, the esterification temperature is 200°C;

[0046] Step 3: Add acetic anhydride to the product of step 2 to carry out acylation at a temperature of 120° C., and the acylation time is 2 hours;

[0047] Step 4: Store the frozen section of the product in step 3 to obtain the PVC internal lubricant.

[0048] The composition of each ingredient is:

[0049] Ethylene glycol 34%

[0050] Pentaerythritol 26%

[0051] Vegetable fatty acids: 36%

[0052] Tetrabutyl titanate: 1%

[0053] Acetic anhydride 3%.

[0054] The vegetable fatty acid is extracted from waste waste oil.

[0055] This embodiment is the most commonly used embodiment, and the error tolerance rate of each component ratio is high, but the corres...

Embodiment 2

[0057] Step 1: Prepare ethylene glycol and pentaerythritol in proportion, add tetrabutyl titanate as a catalyst, stir for 10-15 minutes, and polymerize at 180°C for 4.5 hours;

[0058] Step 2: Add vegetable fatty acid to the product of step 1 to carry out esterification of 8, and the esterification temperature is 200°C;

[0059] Step 3: Add acetic anhydride to the product of step 2 to carry out acylation at a temperature of 120° C., and the acylation time is 2 hours;

[0060] Step 4: Store the frozen section of the product in step 3 to obtain the PVC internal lubricant.

[0061] The composition of each ingredient is:

[0062] Ethylene glycol 20%

[0063] Pentaerythritol 10%

[0064] Vegetable fatty acids: 64%

[0065] Tetrabutyl titanate: 3%

[0066] Acetic anhydride 3%.

[0067] The vegetable fatty acid is extracted from waste waste oil.

[0068] In this embodiment, there are many vegetable fatty acid components. When this embodiment is adopted, the processing time is ...

Embodiment 3

[0070] Step 1: Prepare ethylene glycol and pentaerythritol in proportion, add tetrabutyl titanate as a catalyst, stir for 10-15 minutes, and polymerize at 180°C for 4 hours;

[0071] Step 2: adding vegetable fatty acid to the product of step 1 for 8 hours of esterification, the esterification temperature is 200°C;

[0072] Step 3: Add acetic anhydride to the product of step 2 to carry out acylation at a temperature of 120° C., and the acylation time is 2 hours;

[0073] Step 4: Store the frozen section of the product in step 3 to obtain the PVC internal lubricant.

[0074] Ethylene glycol 30%

[0075] Pentaerythritol 27%

[0076] Vegetable fatty acids: 35%

[0077] Tetrabutyl titanate: 3%

[0078] Acetic anhydride 5%.

[0079] The vegetable fatty acid is extracted from waste waste oil.

[0080] This embodiment is the most commonly used embodiment, and the proportions of the various ingredients are relatively balanced, and the corresponding processing time can also be eff...

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PUM

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Abstract

The invention aims to solve the problems in the prior art and provides a process for manufacturing a polyvinyl chloride (PVC) internal lubricant. By the process, wastes can be utilized; cost is reduced; and product quality is improved. The invention provides the process for manufacturing the PVC internal lubricant so as to fulfill the aim. The process comprises the following steps of: mixing glycol and pentaerythritol in a ratio; adding tetrabutyl titanate serving as a catalyst; adding vegetable fatty acid to perform esterification for at least 8 hours; adding acetic anhydride to perform acylation at the temperature of 120 DEG C; and freezing, slicing and storing to obtain the PVC internal lubricant. The vegetable fatty acid refined by illegal cooking oil serve as a main raw material, so cost is saved and the overall thermal stability of the products is high. Compared with the prior art, the process is additionally provided with the process step of adding the acetic anhydride to perform acylation, so the residual alcohol after the reaction is finished is acetylated, and high slip resistance and low migration mobility of the final product are guaranteed.

Description

【Technical field】 [0001] The invention relates to the field of plastics, in particular to a process for preparing a PVC internal lubricant for PVC engineering additives. 【Background technique】 [0002] PVC (polyvinyl chloride) is a chlorinated polymer of PE (polyethylene). It is one of the most widely used plastics and is still used in large quantities. Its consumption is second only to polyethylene and polypropylene. There are many forms of PVC products, which can be divided into three categories: hard PVC, soft PVC, and PVC paste. Rigid polyvinyl chloride is mainly used in extruded products such as pipes, door and window profiles, sheets, etc., as well as injection molded parts such as pipe joints and electrical parts, and extrusion blown bottle products, which account for more than 65% of the consumption of polyvinyl chloride. Soft polyvinyl chloride is mainly used in calendered sheets, automotive interior accessories, handbags, films, labels, wires and cables, medical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/48C08L27/06C08L71/08
Inventor 夏森林徐璐莎夏国斌
Owner 夏瑭
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