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High weather-proof, multiple-effect, environmentally-friendly PVC composite heat stabilizer and preparation method thereof

A composite heat stabilizer, high weather resistance technology, applied in chemical instruments and methods, inorganic chemistry, oxygen/ozone/oxide/hydroxide, etc. The effect of improving thermal stability and reducing cost

Inactive Publication Date: 2010-06-16
慧科高新科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Most of them focus on plastic coloring, such as increasing the dispersibility of organic or inorganic pigments, but rarely apply hyperdispersants to lead salt composite stabilizers for PVC

Method used

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  • High weather-proof, multiple-effect, environmentally-friendly PVC composite heat stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Prepare 2×10 -3 mol / l sodium oleate aqueous solution (solution A), weigh 98.59g MgSO 4 ·7H 2 O and 66.64gAl 2 (SO 4 ) 3 18H 2 O was dissolved in 500ml deionized water to make Mg 2+ and Al 3+ According to the mixed solution (solution B) of 2:1 molar ratio, 48.00g NaOH and 10.60g Na 2 CO 3 Dissolve in 500ml deionized water to make OH - / CO 3 2- A mixed solution with a molar ratio of 12:1 (Solution C). Take 500ml of solution A and put it into a 2L three-necked flask, heat it in a water bath to 40-60°C, under the condition of vigorous stirring, add 500ml of solution B and 500ml of solution C dropwise at the same time, and the dropping speed should be completed within 45min. During the dropwise addition, the pH value of the solution was kept at 9.0-9.5. Continue to stir for 30 minutes after the dropwise addition, then increase the temperature of the water bath to 60-80°C for 3 hours, cool to room temperature naturally, repeat suction filtration, and wash the pre...

Embodiment 2

[0040] According to the preparation steps of Example 1, weigh 147.89g MgSO 4 ·7H 2 O and 66.64g Al 2 (SO 4 ) 3 18H 2 O was dissolved in 500ml deionized water to make Mg 2+ and Al 3+ According to the mixed solution (solution B) with a molar ratio of 3:1, mix 64.00g NaOH with 10.60g NaOH 2 CO 3 Dissolve in 500ml deionized water to make OH - / CO 3 2- A mixed solution with a molar ratio of 16:1 (Solution C). According to the steps of the above method, the hydrophobic nano-hydrotalcite with a magnesium-aluminum molar ratio of 3:1 is prepared. The particle size of the prepared hydrotalcite is 30-70nm.

[0041] A hyperdispersant was prepared according to Example 1, and the mass ratio of maleic anhydride, sodium propylene sulfonate and polyethylene glycol monoacrylate in the hyperdispersant was 50:35:15.

[0042] The prepared hydrotalcite, hyperdispersant are mixed with calcium stearate, zinc stearate, lubricant, surface modifier and auxiliary heat stabilizer, and the spe...

Embodiment 4～5

[0049] Use hydrophobic nano-hydrotalcite with Mg / Al molar ratio of 2:1, change the composition and ratio of the composite heat stabilizer, add it to 100 parts of PVC in the same amount, and then add 60 parts of diisooctyl phthalate (DOP ), and then according to the national standard GB2113-82 "Plastic whiteness test method", the prepared three kinds of PVC plastics are subjected to heat-resistant whiteness test, Table 2 is the composition formula of three kinds of composite heat stabilizers, and Table 3 is to put the test piece on The relative whiteness value tested in the whiteness meter tested with a standard whiteness board with a whiteness of 85%. It can be found from Table 3 that the prepared hydrophobic nano-hydrotalcite composite stabilizer has excellent thermal stability compared with traditional stabilizers.

[0050] Table 2

[0051] Reality

apply

example

Hydrophobic Nano

Hydrotalcite

(parts by weight)

hyperdispersant

(parts ...

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Abstract

The invention discloses a high weather-proof, multiple-effect, environmentally-friendly PVC composite heat stabilizer which is composed of the following raw materials in percentage by weight: 20-40% of calcium stearate, 15-25% of zinc stearate, 10-30% of hydrophobicity nano-hydrotalcite, 1-1.5% of hyperdispersant, 5-15% of lubricating agent, 4-7% of surface modifier and 5-15% of assistant heat stabilizer, wherein, hydrophobicity nano-hydrotalcite is prepared with a coprecipitation method by adding sodium oleate, and the molar ratio of Mg to AL in hydrophobicity nano-hydrotalcite is 2-3:1; the hyperdispersant is copolymer of maleic anhydride-sodium allyl sulfonate-crylic acid polyethylene glycol monoester. The nano-hydrotalcite prepared by the invention has better hydrophobic property and favorable compatibility with PVC matrix. Hydrophobicity nano-hydrotalcite and hyperdispersant are added to lower balancing torque, improve handling characteristics and weather resistance and lower cost. The preparation method of the invention has no pollution and low energy consumption.

Description

technical field [0001] The invention relates to a composite thermal stabilizer prepared by utilizing hydrophobic nanometer hydrotalcite with long-term thermal stability and a hyperdispersant for PVC with hyperdispersive effect. 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] Due to the advantages of easy-to-obtai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/06C08K3/34C08K5/098C08K5/1515C08K5/07C08L51/08C01B13/36C08F285/00
Inventor 唐守余
Owner 慧科高新科技股份有限公司
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