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Hydrotalcite-rare earth-calcium zinc stablizer for PVC and its preparation method

A calcium-zinc stabilizer and hydrotalcite technology, applied in the chemical industry, can solve the problems of thermal stabilizers such as unsatisfactory effect, high price, and strong odor, and achieve excellent long-term thermal stability effect, low cost, and good anti-separation performance Effect

Inactive Publication Date: 2007-08-01
扬州科宇化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the currently commonly used non-toxic heat stabilizers, organotin heat stabilizers have good thermal stability, but the cost is high, the price is expensive, and some varieties have a relatively large odor (tin mercaptides), which limits its application, while pure metal soaps The effect of similar heat stabilizers is not very satisfactory, especially in hard products, only a few countries can have calcium and zinc non-toxic composite stabilizers for hard products
In order to find a new type of heat stabilizer that can replace organotin heat stabilizers and has better performance, rare earth compounds are usually used for compounding. However, almost all rare earth compound stabilizers on the market currently contain a certain amount of lead salts. Failed to achieve real non-toxic requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 100kg of epoxy oleic acid and 300kg of water into a stirring stainless steel reactor, heat and melt, start stirring, add 0.5kg of glacial acetic acid under stirring, and add calcium hydroxide into the reactor at 75-80°C 9kg, zinc oxide 3.8kg, after 2 hours of thermal insulation reaction at 80°C, add 100kg of dilauric acid rare earth, 100kg of dodecylbenzenesulfonic acid pillared hydrotalcite, react at 80°C for 0.5 hour, the material is centrifuged, and in 100 Dry at ℃ to obtain hydrotalcite-rare earth-epoxy fatty acid calcium zinc compound.

[0037] Add 200 kg of the prepared above-mentioned materials into a kneader for heating and stirring, add 10 kg of quaternary tetraol ester, and knead for 20 minutes at 100° C., then add 10 kg of polyethylene wax and 10 kg of monoglyceride stearate into the kneader, Antioxidant 8kg, dibenzoylmethane 2kg, kneaded and stirred for 30 minutes, discharged into tablets, sieved, and packaged.

Embodiment 2

[0039] In a stainless steel reaction kettle with a stirrer, add 100kg of epoxy oleic acid and 300kg of water, heat and melt, start stirring, add 0.5kg of glacial acetic acid under stirring, and add hydrogen oxide into the reactor at 75-80°C Calcium 8.8kg, zinc oxide 4kg, after heat preservation reaction at 80°C for 2 hours, add 125kg of dilauric acid rare earth paste (content 70%), dodecylbenzenesulfonic acid pillared hydrotalcite 90kg, react at 80°C for 0.5 hours, the material was dried by centrifugation and dried at 105°C to obtain a hydrotalcite-rare earth-epoxy fatty acid calcium zinc compound.

[0040] Add 200 kg of the prepared above-mentioned materials into a kneader, heat and stir, add 10 kg of triphenyl phosphite, and knead for 30 minutes at 100° C., then add 3 kg of stearyl-benzoyl-methane into the kneader, hard 15kg of fatty acid, 5kg of polyethylene wax, 8kg of antioxidant, kneaded and stirred for 30 minutes, discharged into tablets, sieved, and packed.

Embodiment 3

[0042] In a stainless steel reaction kettle with a stirrer, add 100kg of epoxy oleic acid and 300kg of water, heat and melt, start stirring, add 0.5kg of hydrogen peroxide under stirring, and add calcium hydroxide into the reaction kettle at 65-70°C 8.7kg, zinc oxide 4.2kg, heat preservation reaction at 80°C for 2 hours, add oleic acid rare earth 90kg, dodecyl sulfate pillared hydrotalcite 130kg, react at 80°C for 1 hour, the materials are centrifuged, and placed at 105°C After drying, hydrotalcite-rare earth-epoxy fatty acid calcium zinc compound is obtained.

[0043] Add 200 kg of the prepared above-mentioned materials into a kneader, heat and stir, add 10 kg of pentaerythritol ester, and knead for 30 minutes at 100° C., then add 3 kg of dibenzoylmethane, 15 kg of ethylene dithioester amide, hard Fatty acid monoglyceride 10kg, antioxidant 5kg, kneading and stirring for 30 minutes, discharge granulation, sieving, packaging.

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Abstract

The invention discloses a PVC hydrotalcite- rare earth- calcium zinc stabilizing agent and the method for preparing the same, which in detail erlates to plastic composite stabilizing agent and the preaparing method, belonging to chemical field. The main component for stabilizing comprises column- supported hydrotalcite, unsaturated rare earth, and epoxy aliphatic acid calcium zinc, and it is prepared through chemical synthesis, reformed treatment and optimization compound. The product is characterized by outstanding thermal stabilizing effect, good first stage coloring property, sound plasticizing property, good transparenty, weatherability, improved quality, high effeciciency, no toxicity, no pollution, low cost. It can replace expensive organotin thermal stabilizing agent and is widely used in PVC product preparation, such as water- supply pipes, section bar, transparent granulate, film, medical apparatus, toy, fridge stamp and box sheet material.

Description

technical field [0001] The invention relates to a PVC hydrotalcite-rare earth-calcium zinc stabilizer and a preparation method thereof, which is a stabilizer for plastic compounding and a preparation method thereof, and belongs to the technical field of chemical industry. Background technique [0002] As we all know, PVC resin and its products have the disadvantages of thermal degradation and aging. Its processing temperature (above 160°C) is higher than the decomposition temperature (120-130°C). Therefore, to turn PVC into products, it must be processed in PVC. Heat stabilizers are added during the molding process to delay or prevent the thermal degradation of PVC resin. For a long time, heat stabilizers used for PVC mainly include lead salts, metal soaps, organotins and rare earths. Since the mid-1960s, due to a series of pollution problems, lead (cadmium) salt stabilizers have been restricted. [0003] Domestic and foreign laws and regulations on its restriction and pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K13/02C08L27/06
Inventor 王大年梁永桂
Owner 扬州科宇化工有限公司
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