Application of a kind of dibasic carboxylic acid alkali metal salt as zinc burning inhibitor

Abstract

The invention provides application of a dicarboxylic alkali metal salt serving as a zinc burning inhibitor. The dicarboxylic alkali metal salt is straight-chain carboxylate or branched chain carboxylate, an alkyl in the dicarboxylic alkali metal salt is a saturated alkyl or unsaturated alkyl, the number of carbon atoms of the dicarboxylic alkali metal salt is 4-22, preferably 5-14, and an alkali metal in the dicarboxylic alkali metal salt is sodium, lithium, or potassium. The dicarboxylic alkali metal salt disclosed by the embodiment of the invention has a good effect on zinc burning inhibition, and is low in price, low in cost, and environmentally friendly.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to the application of a dibasic carboxylic acid alkali metal salt as a zinc burning inhibitor. Background technique [0002] PVC materials can be used for packaging, walls, pipes, films and profiles, and its large-scale application depends on the addition of excellent heat and light stabilizers to the polymer. For example, thermal degradation and photodegradation can cause discoloration and changes in physical properties of materials. The addition of excellent stabilizers can improve the application and manufacturing conditions of these materials. [0003] Generally, in the process of PVC processing, PVC plastic can only be processed and formed when it is above 160°C, and it begins to thermally decompose at 120-130°C, releasing HCl gas. If the generation of HCl is not suppressed, the decomposition will be further intensified. Studies have found that if PVC plastic contains a small ...

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Problems solved by technology

There is also the patent whose publication number is CN102219926, the patent whose publication number is CN102093648 and the patent whose announcement number is CN101942160B. It is also correspondingly introduced that β-diketone can be used to delay zinc burning. Although the effect is very good, the price is relatively expensive. The price can reach about 4-5 times that of other heat stabilizers, which seriously restricts its development space

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