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Weather-resistant calcium-zinc stabilizer for PVC and preparation method thereof

A calcium-zinc stabilizer and weather-resistant technology, which is applied in the field of weather-resistant calcium-zinc stabilizer for PVC and its preparation field, can solve the problems of reducing PVC rigid products, reducing the softening point of products, poor lubricity, etc., so as to improve weather resistance and improve Weather resistance and thermal stability, the effect of improving compatibility

Active Publication Date: 2019-10-22
杭州锦新高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Calcium-zinc stabilizer is made of calcium salt, zinc salt, lubricant, antioxidant, etc. as the main components through a special composite process. Calcium-zinc stabilizer is usually divided into solid calcium-zinc stabilizer and liquid calcium-zinc stabilizer, liquid calcium-zinc stabilizer Calcium-zinc stabilizers have good compatibility with resins and plasticizers, good transparency, and are not easy to precipitate, but their lubricity is poor, which will reduce the softening point of the product, and will deteriorate after long-term storage; solid calcium-zinc stabilizers are based on their appearance The form can be divided into powder, sheet and paste. It is characterized by good lubricity and will not reduce the softening point of hard PVC products. It is suitable for the processing of hard PVC pipes and profiled materials.

Method used

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  • Weather-resistant calcium-zinc stabilizer for PVC and preparation method thereof
  • Weather-resistant calcium-zinc stabilizer for PVC and preparation method thereof
  • Weather-resistant calcium-zinc stabilizer for PVC and preparation method thereof

Examples

Experimental program
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Effect test

preparation example 1

[0034] Preparation Example 1: ① Mix tetraethoxytitanium with a molar ratio of 6:1 and hydrochloric acid and stir for 40 minutes to obtain a titanium dioxide sol;

[0035] ②Take 10kg montmorillonite, add 500kg, 2wt% sodium chloride solution, heat up to 60°C, stir for 30min; let it stand for 16h after natural cooling, and obtain a solidified product after filtering; wash and dry the solidified product, and then Place in 200kg of water and mix evenly to obtain sodium-based montmorillonite;

[0036] ③Take 10kg of titanium dioxide sol and the sodium-based montmorillonite solution in step ②, stir for 40min at a speed of 1000r / min at a temperature of 80°C; add 1kg of cetyltrimethylammonium bromide, and stir for 10min, The temperature was kept at 120° C. for 30 hours, and the mixture was obtained after filtration; after the mixture was washed and dried, it was placed at a temperature of 600° C. and burned for 2 hours to obtain nano-titanium dioxide intercalated montmorillonite.

preparation example 2

[0037] Preparation example 2: ①Mix tetraisopropoxytitanium and nitric acid with a molar ratio of 6:1 and mix and stir for 50 minutes to obtain titanium dioxide sol; ②Take 10kg montmorillonite, add 500kg, 2wt% sodium chloride solution, and heat up to 70°C , stirred for 45 minutes; left to stand for 18 hours after natural cooling, and filtered to obtain a solidified product; after the solidified product was washed and dried, it was placed in 200kg of water and mixed evenly to obtain sodium-based montmorillonite;

[0038] ③Take 12.5kg of titanium dioxide sol and the sodium-based montmorillonite solution in step ②, stir for 50min at a speed of 1250r / min at a temperature of 85°C; add 1.5kg of cetyltrimethylammonium bromide, and stir for 15min Finally, the mixture was kept at 125° C. for 35 hours, and filtered to obtain the mixture; after the mixture was washed and dried, it was placed at a temperature of 700° C. and burned for 2.5 hours to obtain nano-titanium dioxide intercalated m...

preparation example 3

[0039] Preparation example 3: ① Mix titanium tetrachloride and hydrochloric acid with a molar ratio of 6:1 and stir for 60 minutes to obtain a titanium dioxide sol;

[0040] ② Take 10kg montmorillonite, add 500kg, 2wt% sodium chloride solution, heat up to 80°C, stir for 60min; let it stand for 20h after natural cooling, and obtain a solidified product after filtering; wash and dry the solidified product, and then Place in 200kg of water and mix evenly to obtain sodium-based montmorillonite;

[0041]③Take 15kg of titanium dioxide sol and the sodium-based montmorillonite solution in step ②, and stir for 60min at a speed of 1500r / min at a temperature of 90°C; add 2kg of cetyltrimethylammonium bromide, and stir for 20min. The temperature was kept at 130° C. for 40 hours, and the mixture was obtained after filtration; after the mixture was washed and dried, it was placed at a temperature of 800° C. and burned for 3 hours to obtain nano-titanium dioxide intercalated montmorillonite....

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Abstract

The invention discloses a weather-resistant calcium-zinc stabilizer for PVC and a preparation method thereof, and belongs to the technical field of plastic additives. The main point of the technical scheme is that the calcium-zinc stabilizer for PVC comprises the following components, by weight: 340-360 parts of stearic acid, 45-55 parts of zinc oxide, 5-7 parts of magnesium oxide, 15-20 parts ofwater, 75-100 parts of a lubricant, 60-75 parts of polyol, 15-25 parts of an antioxidant, 150-200 parts of calcium hydroxide, 50-60 parts of calcium carbonate and 6-8 parts of nano titanium dioxide intercalated montmorillonite. The calcium-zinc stabilizer of the invention has good weather resistance and thermal stability and can reduce the yellowing of products. Through the cooperation of the nanotitanium dioxide intercalated montmorillonite and the lubricant, the dispersibility of the calcium-zinc stabilizer and the compatibility of resin can be improved and the processing fluidity of the products and the surface smoothness of the products can be improved.

Description

technical field [0001] The invention relates to the technical field of plastic additives, in particular to a weather-resistant calcium-zinc stabilizer for PVC and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is a common plastic material. Its products have good physical and chemical properties and are widely used in industry, construction, agriculture, daily life, packaging, electric power, public utilities and other fields. However, when PVC is processed under high temperature and high shear conditions, it is easy to remove the hydrogen chloride on the molecule and cause the polymer to degrade, resulting in discoloration of the product and a decrease in the mechanical properties of the product, which affects its service life. Therefore, it is necessary to add heat during processing. Stabilizer to increase its thermal stability. Traditional heat stabilizers for PVC are lead cadmium salts and organotin, but these two heat stabilizers ar...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L23/06C08K13/06C08K5/098C08K3/22C08K5/053C08K3/26C08K3/34C08K9/04C08K9/02C08K9/12C08K5/134
CPCC08K2003/2224C08K2003/2241C08K2003/265C08K2201/011C08L27/06C08L2201/08C08L23/06C08K13/06C08K5/098C08K3/22C08K5/053C08K3/26C08K3/346C08K9/04C08K9/02C08K9/12C08K5/1345Y02P20/52
Inventor 蒋晓钦
Owner 杭州锦新高分子材料有限公司
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