A kind of synthetic cetyl oil compound fatliquoring agent and preparation method thereof

Abstract

The invention provides a synthetic sperm oil complex greasing agent and a preparation method thereof. The method specifically comprises the following steps: (1) adding oleic acid and catalyst, warming to 90 DEG C, adding polyethylene glycol within 1 hour, wherein the mol ratio of the oleic acid to the polyethylene glycol is 1:1.05, and the dosage of the catalyst is 0.1-0.5% of the total mass of the material; (2) then warming to 150-200 DEG C, vacuumizing and hydrating, reacting for 2-5 hours, examining the acid value per hour until the acid level is unchanged, and detecting water solubility, cooling to 40 DEG C and less when up to standard, filtering catalyst and emptying to obtain red brown transparent oily liquid synthetic sperm oil; (3) adding oxazolidine which is 10-15% of the mass of the synthetic sperm oil, 2-5% of polyether modified silicone oil and 5-10% of sulfitation, compounding, and then adding deionized water to regulate the solid content to 50% to obtain red brown transparent synthetic sperm oil complex greasing agent.

Description

technical field [0001] The invention relates to a synthetic cetyl oil compound fatliquoring agent and a preparation method thereof, belonging to the technical field of leather chemical industry. Background technique [0002] Cetyl oil contains more than 70% long-chain fatty alcohol esters of unsaturated fatty acids. This special chemical structure determines that it can endow the leather with a good oily and waxy feeling in addition to the softness and plumpness it should have. , other fatliquors do not have this feature. However, due to the scarcity of whale resources and the limitation of hunting, the source of natural spermaceti oil is very scarce, and people have begun to develop synthetic spermaceti oil. Synthetic cetyl oil is mainly formed by the esterification reaction of oleic acid, linoleic acid, etc. In the chemical method, toluene is often added as a water-carrying agent, and the reflux or decompression reaction is carried out in the presence of a catalyst. Afte...

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Problems solved by technology

The traditional chemical modification methods mainly include sulfation modification, sulfur trioxide sulfonation modification and oxidative sulfitation modification. Among them, sulfation modification is more corrosive to equipment, and waste acid water needs to be separated for static treatment. The performance of acid resistance and electrolyte resistance is also poor, making the product difficult to promote

The synthetic cetyl oil product sulfonated by sulfur trioxide has stable emulsion, strong acid resistance, chromium powder resistance and electrolyte resistance, fine emulsion particles, and good permeability. However, this method requires large equipment investment and needs to be close to the sulfuric acid production plant. Obtaining cheap sulfur trioxide raw materials is difficult to popularize in leather chemical enterprises

Modification by oxidative sulfitation method is to change the double bonds in the synthetic cetyl oil into more reactive epoxy bonds with air blowing, and then use sulfitation reagents for ring-opening reaction. The product performance is the same as that of the sulfonation method. Close, sulfiting reagents are also cheaper, but there will be irritating sulfur dioxide odor in the product, which needs to be removed by vacuuming, and sulfite residues in the product will cause the product to precipitate saturated brine as the storage time prolongs

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