Supported PVC (polyvinyl chloride) heat stabilizer and preparation method thereof

A heat stabilizer, load-type technology, applied in the field of load-type PVC heat stabilizer and its preparation, can solve the problems of low alkali capacity, restriction of application range, decline, etc., achieve easy source, increase heat stability effect, and prepare easy effect

Active Publication Date: 2014-08-06
GUANGXI UNIV
5 Cites 5 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] Chinese Patent [Application (Patent) No.] ZL200510101332.X has announced alkaline calcium-based bentonite and its preparation method. The bentonite is prepared by a semi-dry method, which realizes the reaction of activated clay and calcium hydroxide, but due to the An acid active center only reacts with a calcium hydroxide molecule, and its alkali capacity is not high, so the scope of application is restricted; Preparation and research on the mechanism of fatty acid removal, the crystal layer of ...
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Abstract

A supported PVC (polyvinyl chloride) heat stabilizer is characterized in that the stabilizer takes activated clay as a supporter, an active component, namely, calcium hydroxide, is supported in the supporter, the surface is modified by fatty acid which is good in affinity with PVC, and a specific implementation method is as follows: the activated clay is stirred to be dispersed in water, then a calcium hydroxide emulsion is added for supporting, the fatty acid is added for modifying after supporting, and finally, the PVC heat stabilizer is obtained after filtration, drying and crushing. The stabilizer cannot release salt or organic matters to pollute the PVC after adsorbing hydrogenchloride and is non-toxic, odorless, safe, environment-friendly and easy to prepare, and raw materials are easy to obtain.

Technology Topic

EmulsionChemistry +8

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  • Supported PVC (polyvinyl chloride) heat stabilizer and preparation method thereof

Examples

  • Experimental program(9)

Example Embodiment

[0021] [Example 1]
[0022] The activated clay with an activity of 230, a decolorization rate of 98, and a particle size of 400 mesh was stirred and dispersed in 12.5 times water for 0.5 hours to obtain an activated clay suspension; 67% of the activated clay mass was dispersed in 3 times 30℃ Place in water for 8 hours to obtain calcium hydroxide emulsion; heat the activated clay suspension to 75°C, add calcium hydroxide emulsion uniformly within 3 hours for loading, continue to stir for 1 hour after the addition, and then add 6.5% by mass of activated clay Stearic acid, stirred for 60 minutes; filtered, dried and pulverized to obtain a supported PVC heat stabilizer.
[0023] Ca(OH) of the supported PVC heat stabilizer particles 2 The content, activity index, particle size and thermal stability time analysis results are shown in Table 1.

Example Embodiment

[0024] [Example 2]
[0025] The activated clay with activity degree of 230, decolorization rate of 98, particle size of 400 mesh was stirred and dispersed in 12 times water for 1 hour to obtain an activated clay suspension; 60% of the activated clay mass was put into calcium hydroxide mass Place in water at 5 times 40°C for 10 hours to obtain calcium hydroxide emulsion; heat the activated clay suspension to 75°C, add calcium hydroxide emulsion uniformly within 3 hours for loading, and continue stirring for 1 hour after the addition is complete. Stearic acid with 4% of the activated clay mass is added, and the reaction is stirred for 60 minutes; filtered, dried and pulverized to obtain a supported PVC heat stabilizer.
[0026] Ca(OH) of the supported PVC heat stabilizer particles 2 The content, activity index, particle size and thermal stability time analysis results are shown in Table 1.

Example Embodiment

[0027] [Example 3]
[0028] The activated clay with activity degree of 230, decolorization rate of 98, particle size of 700 mesh was stirred and dispersed in 15 times water for 0.5 hours to obtain an activated clay suspension; 70% of the mass of activated clay was put into calcium hydroxide mass Calcium hydroxide emulsion was obtained by placing it in water at 3 times 50℃ for 10 hours; the activated clay suspension was heated to 75℃, and calcium hydroxide emulsion was added uniformly within 3 hours for loading. After the addition, continue to stir for 1 hour, and then Stearic acid containing 4% of the activated clay mass is added, and the reaction is stirred for 50 minutes; filtered, dried and pulverized to obtain a supported PVC heat stabilizer.
[0029] Ca(OH) of the supported PVC heat stabilizer particles 2 The content, activity index, particle size and thermal stability time analysis results are shown in Table 1.

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