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Grease source sodium/zinc composite liquid heat stabilizer for PVC and its preparation method and application

A compound liquid and thermal stabilizer technology, applied in the field of plastic additives, can solve the problems of poor thermal stability, dust pollution, low volatility, etc., and achieve the effect of improving thermal stability, reducing dust pollution, and promoting the use of high added value

Active Publication Date: 2018-11-27
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved: in order to cope with the existing traditional calcium / zinc heat stabilizer effect on the market, the thermal stability of PVC products is poor, and the traditional powder calcium zinc composite heat stabilizer has the present situation of dust pollution, the present invention uses dimer fatty acid, Tongmaic anhydride and the like are used as raw materials to provide a PVC grease source sodium / zinc composite liquid heat stabilizer and its preparation method and application. The product has low volatility and can effectively improve the thermal stability of PVC products. It can endow polyvinyl chloride products with good plasticizing properties, and can replace or partially replace organic lead salt stabilizers, commercially available general-purpose calcium-zinc stearate composite heat stabilizers, etc.

Method used

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  • Grease source sodium/zinc composite liquid heat stabilizer for PVC and its preparation method and application
  • Grease source sodium/zinc composite liquid heat stabilizer for PVC and its preparation method and application
  • Grease source sodium/zinc composite liquid heat stabilizer for PVC and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0023] The first step, preparation of fat source liquid sodium: 1mol tungalin anhydride (TMA) (or 1mol dimer fatty acid (DA)) is added in reaction bottle, and component is 90wt.% diethylene glycol monobutyl ether and 10wt.% After mixing the organic solvent of liquid paraffin (the addition amount is 50% of TMA mass or 20% of DA mass), heat to 85°C, prepare 1.1mol NaOH into 80% (w / w) aqueous solution, add NaOH aqueous solution dropwise In the reaction bottle, after the dropwise addition is completed, after being incubated at 75° C. for 1 h, after the water in the solvent is distilled off under a vacuum of 1 to 2 mmHg, the heating is stopped, and the temperature is cooled to room temperature to obtain the oil source liquid sodium, which is sodium dimer acid ( DA-Na) and sodium traimate (TMA-Na).

[0024] The second step is to prepare the oil source liquid zinc: mix 0.95 mol zinc oxide, 1 mol TMA (or 1 mol DA), 200 mL of high boiling point petroleum ether, and 300 mL of propylene ...

Embodiment 2

[0028] The first step is to prepare the oil source liquid sodium: 1mol propylene oleic acid is added in the reaction flask, and the main components are diethylene glycol monobutyl ether and liquid paraffin organic solvent (the addition is 45% of the propylene oleic acid quality) and mixed After uniformity, heat to 65°C, prepare 1.55mol NaOH into an 80% (w / w) aqueous solution, drop NaOH aqueous solution into the reaction bottle, after the dropwise addition, keep warm at 75°C for 1 hour, and then vacuum After distilling off the water in the solvent at 100°C, stop heating and cool down to room temperature to obtain the oil source liquid sodium.

[0029] The second step is to prepare liquid zinc as a grease source: stir 1 mol of zinc oxide, 1 mol of acrylic acid and 200 mL of 1,4-dioxane evenly, and then heat it at 115°C for 1.5h, then raise the temperature to 120°C for 5h, and then heat it at 120°C for 5h. After distilling off 1,4-dioxane and water under a vacuum of 1 to 2 mmHg, ...

Embodiment 3

[0032] The first step, prepare fat source liquid sodium: 0.7mol dimer acid, 0.3mol propylene lyric acid are added in the reaction flask, and main component is the organic solvent of 80% diethylene glycol monobutyl ether and 20% liquid paraffin (adding The amount is 45% of the total mass of dimer acid and acrylic acid), and after mixing evenly, heat to 75°C, prepare 1.65mol NaOH into an 80% (w / w) aqueous solution, add NaOH aqueous solution to the reaction flask dropwise, After the addition is complete, keep the temperature at 80°C for 1 hour, distill off the water in the solvent under a vacuum of 1-2 mmHg, stop heating, cool down to room temperature, and obtain the oil source liquid sodium.

[0033] The second step is to prepare the oil source liquid zinc: stir 0.8mol zinc oxide, 0.7mol dimer acid, 0.3mol acrylic acid and 300mL propylene glycol methyl ether, and keep it at 115°C for 1.5h, then heat it up to 135°C 4h, after distilling off propylene glycol methyl ether and water ...

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Abstract

The invention relates to a grease-derived sodium / zinc compound liquid heat stabilizer for PVC and a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing grease-derived liquid sodium, and then preparing grease-derived liquid zinc; and finally, preparing the grease-derived sodium / zinc compound liquid heat stabilizer. The heat stabilizer provided by the invention is relatively large in molecular volume and relatively long in fatty acid chain section, so that a grease-derived sodium / zinc compound liquid heat stabilizer product has the potential of a synergistic plastifying function. In addition, in the presence of a six-member alicyclic ring structure and a polycarboxylate structure, the heat stability of the grease-derived sodium / zinc compound liquid heat stabilizer product is effectively improved, so that the deficiency of an existing zinc calcium stearate compound heat stabilizer is made up. The heat stabilizer serving as the heat stabilizer for PVC can reduce the problem of dust pollution caused by a powder heat stabilizer. By selecting a derivative of natural grease as a raw material, a high quality PVC heat stabilizer is prepared, so that high additional value utilization of green renewable forest resources is favorably pushed, thereby complying with the demands on greenness and environmental friendliness and sustainable development.

Description

technical field [0001] The invention belongs to the field of plastic additives, and in particular relates to a grease source sodium / zinc composite liquid heat stabilizer for PVC, a preparation method and application thereof. Background technique [0002] Polyvinyl chloride (PVC) resin is a thermoplastic linear polymer produced by free radical polymerization of vinyl chloride monomer, and is one of the five general-purpose resins in the world. Compared with other general-purpose resin products, PVC products have the advantages of being more energy-saving and low-carbon. However, there are many structural defects in PVC molecules such as branched chains, tertiary chlorine atoms, allyl chlorides, etc., which make PVC unstable. PVC has poor thermal stability, and the difference between softening temperature and decomposition temperature is very small, which brings great difficulties to processing. Therefore, a certain amount of thermal stabilizer must be added during its proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L91/00C08L91/06C08K5/00C08K5/098C08K5/134
CPCC08K2201/014C08L27/06C08L2201/08C08L2205/02C08L2205/03C08L91/00C08L91/06C08K5/00C08K5/098C08K5/1345
Inventor 李梅夏建陵丁呈祥汪梅许利娜李守海黄坤
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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