Sulfur-containing zinc soap composition for chlorine-containing polymer thermostable systematic and preparation thereof
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A composition and polymer technology, applied in the field of sulfur-containing zinc soap composition and its preparation, can solve the problems of low stabilization effect, poor performance, unachieved, etc., and achieve excellent color retention performance, broad application prospects, and long stabilization time. Effect
Active Publication Date: 2009-05-27
江苏仁通节能科技有限公司
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Problems solved by technology
However, my country is still dominated by highly toxic, highly polluting, and low-grade lead salt stabilizers, and does not pay enough attention to the development and research of composite metal soaps, resulting in the lack of high-performance auxiliary stabilizers, and there are few varieties of calcium-zinc composite heat fixers. Poor performance, there is a big gap compared with foreign countries
[0003] Traditional calcium stearate (CaSt 2 ), zinc stearate (ZnSt 2 ) as a PVC stabilizer, its stabilizing effect is low, and it will produce "zinc burning" phenomenon, which will make PVC black and degrade completely in a short time
In order to further enhance its stabilizing effect, the CaSt 2 / ZnSt 2 Composite stabilizers add auxiliary stabilizers, such as polyols (Polymer Degradation and Stability.2006, 91: 2233-2240), β-diketones (US4000100), zeolites (US6531533), hydrotalcites (EP1652881), etc. to improve CaSt 2 / ZnSt 2 The stabilizing performance of the compound stabilizer, but the desired effect has not yet been achieved
Method used
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Effect test
Embodiment 1
[0024] a) At room temperature, disperse 21.95g of zinc acetate in 70mL of toluene, and keep stirring until uniformly dispersed;
[0025] b) Prepare a toluene solution (60mL) of propanethiol (22.35g), and slowly add it dropwise to a, the viscosity of the solution becomes larger. After the dropwise addition was complete, stirring was continued for 12 hours.
[0026] c) centrifuging the product, pouring off the upper liquid, and drying at 120° C. to obtain white zinc propanethiolate powder.
Embodiment 2
[0028] a) At room temperature, disperse 26.7g of zinc acrylate in 70mL of ethanol, stirring continuously until uniformly dispersed;
[0029] b) A toluene solution (80 mL) of n-octyl mercaptan (30.18 g) was prepared and slowly added dropwise to a, the viscosity of the solution increased and the color gradually turned white. After the dropwise addition was complete, stirring was continued for 2 hours.
[0030] c) centrifuging the product, pouring off the upper liquid, washing with toluene three times, and drying at 90° C. to obtain n-octyl thiol zinc powder.
Embodiment 3
[0032] a) At room temperature, disperse 15.36g of zinc stearate in 90mL of toluene, and keep stirring until uniformly dispersed;
[0033] b) Prepare a toluene solution (100mL) of n-butanethiol (37.60g), and slowly add it dropwise to a, the viscosity of the solution becomes larger. After the dropwise addition, the reaction was continued for 18 hours.
[0034] c) centrifuging the product, pouring off the upper liquid, washing with ethanol three times, and drying at 120° C. to obtain white zinc n-butanethiol powder.
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Abstract
The invention relates to a sulfur zinc-containing soap composition for a chlorine-containing polymer thermostable system, and a preparation method thereof. The sulfur zinc-containing soap composition comprises the following compositions by mass percentage occupying the total mass of the thermal stabilizer composition: 10 to 50 percent of sulfur zinc-containing soap, 10 to 60 percent of calcium soap, 10 to 50 percent of chelating agent and 1 to 10 percent of antioxidant. The sulfur zinc-containing soap is obtained by reacting sulfur zinc-containing soap with a sulfur-containing organic substance. The composition can obviously inhibit thermal degradation of chlorine-containing polymers, effectively reduce initial coloring of the chlorine-containing polymers at a processing temperature, and provide long-term color stability, has stability better than that of the prior CaSt2 / ZnSt2 composite stabilizer, has the characteristics of non-toxicity, no heavy metal pollution and so on, avoids high cost of an organic tin stabilizer and toxicity of a lead stabilizer and a cadmium stabilizer, and has certain practical value.
Description
technical field [0001] The invention relates to the field of polymer materials, in particular to a sulfur-containing zinc soap composition used in a chlorine-containing polymer thermal stability system and a preparation method thereof; the composition is used to improve the thermal stability and anti-coloration of chlorine-containing polymers sex. Background technique [0002] Chlorine-containing polymers are one of the most important general-purpose plastics, with a world output of more than 30 million t / a. Among them, polyvinyl chloride (PVC) is widely used in chemical building materials, pipes, packaging and other fields. In 2005, my country's PVC output was 6.492 million tons. Due to the particularity of the structure of chlorine-containing polymers, it will inevitably degrade under the action of heat and shear, release HCl with catalytic degradation effect, deepen the color, reduce the mechanical properties, until it loses its use value, so the processing of PVC must u...
Claims
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