3results about How to "Reduce color" patented technology

This invention relates to the field of phenolic resin technology, specifically to a preparation process for polymerized rosin-modified phenolic resin. First, polymeric rosin with high dimer content is purified by devolatilization, adsorption decolorization, and antisolvent precipitation to obtain directionally polymerized rosin A. Then, an epoxidation reaction is performed to obtain epoxidized product B. Subsequently, cashew phenol, 3-pentadecanylphenol, and oleic acid are grafted in stages to obtain directionally modified polymeric rosin C. Simultaneously, a phenolic prepolymer is prepared. Finally, the prepolymer, modified rosin C, and natural rosin are polycondensed together, and an antioxidant is added to obtain the finished product. This process, through directional control of raw materials and staged reaction control, enables the resin to possess high softening point, light color stability, high n-heptane tolerance, and excellent processing safety, significantly improving batch consistency and making it suitable for high-performance ink binders.

The application discloses a kind of fermented vegetable oil and its production method.The application belongs to resting cell whole-cell enzymatic fermentation process: first by high-density fermentation to obtain yeast bacteria liquid, then separation and washing to obtain clean high-activity yeast bacteria, high-activity yeast bacteria, water, vegetable oil are mixed according to proportion, under specific temperature, oxygen supply and pH condition, by whole-cell enzymatic fermentation process using resting yeast bacteria to ferment vegetable oil, after fermentation, secondary centrifugal filtration is obtained fermented vegetable oil.Compared with the fermented vegetable oil obtained by conventional microbial fermentation process, the fermented oil obtained by the application has less impurities, lighter color, cleaner oil, lower ash content, stronger oxidation stability, longer shelf life and other advantages, and compared with natural vegetable oil crude oil, it is rich in free fatty acids, flavonoids, polysaccharides and natural glycolipids, has better skin moisturizing, repairing, soothing and antioxidant effects, and has good economic value and application prospect in the field of beauty and skin care.