Natural rubber latex anticoagulating and antistaling agent and preservation method thereof

Abstract

The invention relates to a natural rubber latex anticoagulating and antistaling agent and a preservation method thereof. The natural rubber latex anticoagulating and antistaling agent comprises sodium bisulfite, butyl p-hydroxybenzoate, sodium carbonate, sodium methasilicate pentahydrat, citric acid, and sodium benzoate. After compounded according to a certain weight ratio, each raw material is added into 1000-1500 parts of natural rubber latex all for one time, and after uniform stirring and dissolution, the mixture only needs to be stored in a prepared container. The anticoagulating and antistaling agent of the invention is characterized by no ammonia, no irritating effect, health and nontoxicity as well as no toxic and side-effect on human body. And on the other hand, compared with ammonia antistaling agents, the antistaling agent in the invention reduces acid consumption for subsequent processing of rubber. The anticoagulating and antistaling agent provided in the invention has the advantages of wide raw material sources, low price, simple manufacturing process, convenient usage, good effect, long preservation time, good quality of rubber latex after application of the agent, and high dry rubber content.

Description

technical field [0001] The invention belongs to the field of rubber, in particular to a natural rubber latex anticoagulation preservative for early storage of natural rubber latex and a natural rubber latex preservation method using the natural rubber latex anticoagulant preservative. Background technique [0002] Rubber is an important industrial raw material, known as the four major industrial raw materials along with steel, petroleum, and coal. Rubber has a wide range of uses due to its unique high elasticity, good physical and mechanical properties and electrical insulation properties. Therefore, the consumption of rubber is very large. Commonly used rubbers include natural rubber and synthetic rubber. At present, the world's annual demand reaches 20 million tons, including 12 million tons of synthetic rubber and 8 million tons of natural rubber. But synthetic rubber cannot replace natural rubber. my country's natural rubber production accounts for only 7% of the wor...

AI Technical Summary

Problems solved by technology

[0005] (1) Ammonia: Ammonia is easy to use, rich in sources, and low in price. The disadvantage is that it is corrosive, irritating, and volatile, and it is inconvenient to transport. It increases the amount of acid used in solidified latex; the amount of ammonia water is generally 1%, and the storage time is 12 hour; Need to continue to add ammoniacal liquor afterwards to prevent fresh latex from coagulating;

[0006] (2) Sodium sulfite: it can neutralize the acid in latex, and it can also inhibit the growth of bacteria and prevent the oxidation of latex. It is especially effective for latex containing too much oxidase; Little effect, the disadvantage is that sodium sulfite is a non-volatile substance, not easy to remove, and the effective storage time is short, generally only 2-4 hours longer than that without preservative; even if the dosage is increased, it cannot be stored until the next day;

The disadvantage is that TT and ZnO are insoluble in water, and they must be prepared into water dispersants before they can be used.

[0011] Above-mentioned various early preservatives all need to use ammonia except sodium sulfite and formaldehyde, and ammonia is corrosive, and increases the acid consumption of coagulation latex; The storage time of sodium sulfite is short; , cheap, easy-to-use natural rubber latex anticoagulant preservative