Boronized ashless dispersant and preparation method thereof

• Main Authors: WEN YING, LI SI, CHEN CHONG, RUI DAQING, LIU CUIDAN, XIAN WEI, GUO SONG
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; FUELS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS; LUBRICANTS; LUBRICATING COMPOSITIONS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION

The invention provides a boronized ashless dispersant and a preparation method thereof. The preparation method comprises the following steps of: mixing polyisobutylene succinic anhydride with base oil; adding a boronizing agent; adding a polyamine compound in an interval feeding manner; carrying out boronizing and amination reactions simultaneously in the feeding process; continuing the reaction after the polyamine compound is fed; and carrying out dehydration in the reaction process and after the reaction is finished, so as to obtain the boronized ashless dispersant. The method provided by the invention is a one-step method; and compared with the existing two-step method, the method is simple in operation and short in reaction time, does not need a solvent and an accelerant, and can prepare various boronized ashless dispersant products with the boron content being less than or equal to 2.0 wt%; and the obtained boronized ashless dispersant has good compatibility with rubber, lower turbidity and good stabilit