Metal oxide-hexanehexol compound heat stabilizer, preparation method and application in PVC

Abstract

The invention discloses a metal oxide-hexanehexol compound heat stabilizer, a preparation method and application in PVC. The heat stabilizer is composed of compounds generated after hexanehexol reacts with metal oxide, and the compounds comprise hexanehexol metal salt, the metal oxide, the hexanehexol and dehydrated hexanehexol. The synthesized metal oxide-hexanehexol compound heat stabilizer is non-toxic and environmentally friendly, low in melting point and easy to disperse, the compatibility between the heat stabilizer and a PVC base body is good, initial coloration is good, long-term stability is good, lubrication performance is good, and the problem that an existing environment-friendly PVC heat stabilizer is poor in heat stabilizing effect is solved. When zinc oxide-mannitol compounds prepared under preferred conditions are applied to PVC, heat stabilizing time can be 240 minutes, and the problem that the existing environment-friendly PVC heat stabilizer is poor in heat stabilizing effect is solved.

Description

technical field [0001] The invention relates to the field of plastic processing aids, in particular to a metal oxide-hexanehexanol composite thermal stabilizer for PVC, a preparation method and its application in PVC. Background technique [0002] Polyvinyl chloride (PVC) is one of the general-purpose plastics with the largest output and consumption. It has the advantages of high strength, good insulation, corrosion resistance, and flame retardancy. It is widely used in crash barriers, water pipes, door and window profiles, cables, and food packaging. , medical equipment and other fields. PVC will degrade when it is higher than 130°C, and its processing temperature is generally above 160°C. At the processing temperature, PVC is easy to remove hydrogen chloride, and the generated hydrogen chloride further catalyzes the degradation of PVC, resulting in a "zipper" degradation reaction. The mechanical properties of PVC decrease, and the color turns yellow, red or even black. T...

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Problems solved by technology

Patent literature CN1844210A has announced that the mixture of mannitol and other polyols is used in conjunction with calcium-zinc heat stabilizer, but the thermal stability and dispersibility of the stabilizer reported in this patent literature need to be further improved, and the stabilizer reported in above-mentioned literature The preparation method is relatively cumbersome and requires multi-step processing technology. At present, there is no report on the preparation of composite thermal stabilizers by reacting hexyl alcohol with metal oxides.

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