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Dawsonite-based polyvinyl chloride composite heat stabilizer and application thereof

A compound heat stabilizer and polyvinyl chloride technology, which is applied in the field of compound heat stabilizers, can solve problems such as difficult promotion and application, and achieve the effects of easy application and promotion, simple production process and good compatibility

Inactive Publication Date: 2010-07-21
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the prior art of dawsonite-containing composite thermal stabilizers all require the combination of γ-(hydroxyalkyl) polyorganosilicone oil, organotin β-diketone salt, polymerized dihydropyridine, semicarbazide, compound Special compound components such as triethanolamine perchlorate metal internal complexes, so it is difficult to popularize and apply

Method used

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  • Dawsonite-based polyvinyl chloride composite heat stabilizer and application thereof
  • Dawsonite-based polyvinyl chloride composite heat stabilizer and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Synthesis of dawsonite:

[0033] In a 500mL flask, add 200mL water and 15.9g anhydrous sodium carbonate (0.15mol), stir and heat up to 70~80℃ to control constant, add 17.1g nearly saturated aluminum sulfate solution (0.05mol) with solid content of 17.1g, stir to react After 1h, add a nearly saturated sodium bicarbonate solution (0.1mol) with a solid content of 8.4g, stir and react for 3h, then add stearic acid with a mass of 3% of the precipitate, continue to stir and react for 0.5h, the reaction product is filtered, After washing, dehydrating and drying at 75°C, it is crushed to pass a 200-mesh sieve to obtain dawsonite products.

Embodiment 2～7 and comparative example 1～6

[0035] Preparation of composite heat stabilizer:

[0036] According to the formula shown in Table 1, each component material was added to a portable high-speed Chinese medicine pulverizer and mixed evenly to obtain the dawsonite-based composite heat stabilizer of the present invention and the calcium-zinc soap heat stabilizer for comparison.

[0037] Table 1 Compound heat stabilizer formula

[0038]

Embodiment 8～14 and comparative example 7～12

[0040] Thermal stabilizer performance test:

[0041] The application performance of the dawsonite-based composite heat stabilizer of the present invention and the calcium-zinc soap composite heat stabilizer for comparison is tested according to the following methods:

[0042] 1. Sample formulation and preparation

[0043] Sample formula:

[0044] Component ratio / parts by mass

[0045] Polyvinyl chloride resin (SG-5 type) 100

[0046] Dioctyl phthalate (DOP) 50

[0047] Epoxidized soybean oil (ESBO) 3

[0048] Heat stabilizer see table 2

[0049] Sample preparation: Add the materials to the high-speed mixer according to the formula, knead evenly, and then masticate the mixture on a plastic mill at 160°C for 5 minutes, and then pull it into a test piece with a thickness of about 1 mm for use.

[0050] 2 Thermal stability test

[0051] Refer to ASTM2115-67, place the test piece on the aluminum sheet, heat it at a constant temperature of 180℃ in a heat aging test box, and take samples at regular ...

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Abstract

The invention discloses a dawsonite-based polyvinyl chloride composite heat stabilizer and application thereof. The heat stabilizer consists of dowsonite, zinc soap and beta-diketone compound, and the proportion of each component by mass: 100 parts of dowsonite, 5 to 100 parts of zinc soap, and 1 to 100 parts of beta-diketone; the consumption volume of the heat stabilizer is that: 0.1 to 8 parts of heat stabilizer is added to every 100 parts of PVC resin. The composite heat stabilizer has the advantages that the raw materials are easy to obtain, the production process is simple, the cost is low, the heat stabilizer is toxic-free and environment-friendly, the compatibility is good, the PVC initial coloring can be effectively inhibited, the long-term heat stabilization efficiency is excellent, the transparency and the electric insulation property are excellent, and the like.

Description

Technical field [0001] The present invention relates to a composite heat stabilizer for polyvinyl chloride. More specifically, the present invention relates to a polyvinyl chloride composite heat stabilizer based on dawsonite and containing zinc soap and β-diketone compound. Agent and its application. Background technique [0002] Polyvinyl chloride (PVC) is one of the five general plastics, and its products have a wide range of uses. However, PVC has the disadvantage of poor thermal stability, and appropriate thermal stabilizers must be added during processing to inhibit its thermal degradation. At present, the commonly used heat stabilizers in the industry mainly include inorganic lead salts, metal soaps and organic tins, etc. [1] . However, most of the commonly used varieties are toxic, which not only limits the scope of application of PVC products, but also the harm to the environment and labor health caused by its use is rapidly deepening with the continuous growth of PVC ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/02C08K3/26C08K5/098C08K5/07C08K5/1545
Inventor 吴茂英赖文华毛芳
Owner GUANGDONG UNIV OF TECH
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