Abstract

Provided are a preparation method for insoluble sulfur and an anti-reversion stabilizer used thereby. Methane is used as the anti-reversion stabilizer. The methane is added to liquid sulfur at sulfur gasification stage, and is cracked into active free radicals under the action of sulfur vapor active free radicals; in the quenching process of sulfur vapor mixed with methane, the active free radicals generated by methane cracking carry out end capping on insoluble sulfur end groups generated by sulfur vapor polymerization, thus completing insoluble sulfur stabilization. The methane is added at liquid sulfur gasification stage, and after sulfur gasification, the methane is mixed with sulfur vapor in a gaseous form, rather than being added to the product in a solid or liquid manner at a later stage, so that the insoluble sulfur and the stabilizer can be uniformly contacted and mixed to the greatest extent.

IPC Classes  ?

• C01B 17/02 - Preparation of sulfurPurification
• C01B 17/12 - Insoluble sulfur (mu-sulfur)

Abstract

The present invention provides a 4-tert-alkylphenol-(morpholinyl)formaldehyde resin, a preparation method therefor and use thereof. The 4-tert-alkylphenol-(morpholinyl)formaldehyde resin is prepared by means of condensation and polycondensation reactions of N-formylmorpholine and alkylphenol. The method of the present invention is simple to operate, is easy to implement, has mild conditions, has no need for high pressure, and has high safety and strong controllability. The product has a high yield and good quality, is environmentally friendly, and saves energy. The methyl group of the obtained resin is linked with a morpholine group. The obtained resin has excellent initial viscosity and long-term viscosity, and has excellent hydrothermal resistance and oxidation resistance, being a good tackifying resin, being particularly suitable for use in the manufacture and production of tires as a long-term tackifying resin for rubbers. The initial viscosity and viscosity durability of a rubber material to which the resin of the present invention is added are greatly improved, the defect rate of tires or rubber articles can be reduced, the quality of tires or rubber articles can be improved, the production cost can be reduced, the production efficiency can be improved, and the dynamic heat generation of rubbers can also be reduced. The resin has good economic and social benefits and broad market prospect.

IPC Classes  ?

• C08G 8/04 - Condensation polymers of aldehydes or ketones with phenols only of aldehydes
• C08L 9/06 - Copolymers with styrene

Abstract

Provided are a preparation method for insoluble sulfur, and an anti-reversion stabilizer used thereby. Methane is used as the anti-reversion stabilizer, and the methane is added to liquid sulfur at a sulfur gasification stage, and is cracked into active free radicals under the action of sulfur vapor active free radicals; in the sulfur vapor quenching process in which the methane is mixed, the active free radicals generated by methane cracking carry out end capping on insoluble sulfur end groups generated by sulfur vapor polymerization, and thus the insoluble sulfur stabilization process is completed. The methane is added at a liquid sulfur gasification stage, and after sulfur gasification, the methane is mixed with sulfur vapor in a gaseous form, rather than being added to the product in a solid or liquid manner at a later stage, so that the insoluble sulfur and the stabilizer can be uniformly contacted and mixed to the greatest extent, the stabilizing process and the mixing difficulty of the stabilizer are reduced, and the production efficiency is improved; moreover, the stabilizer is added at an early stage of production, so that the insoluble sulfur is prevented from reversion, and the product quality is improved.

IPC Classes  ?

• C01B 17/12 - Insoluble sulfur (mu-sulfur)

Goods & Services

Vulcanization accelerators; antioxidants for use in manufacture; anti-incrustants; industrial chemicals; plasticizers; adhesives for industrial purposes.