Cellulose acetate butyrate is a synthetic cellulose with good properties and can be widely used in plastics and coating industries, such as: film base, aerial photography base, film, Oilfield natural gas and other pipelines, tool handles, glass lamps for automobiles and airplanes, underground telephone lines and cable pipes, steering wheels, signage surfaces, flashing reflectors, etc. 1. The main method of synthesizing cellulose acetate butyrate is: using sulfuric acid as catalyst in butyric acid/acetic acid/butyric anhydride reaction system. The degree of substitution of acetyl and butyryl of cellulose acetate butyrate can be adjusted by the amount of organic acid or organic acid anhydride
Advantages of cellulose acetate butyrate
Cellulose acetate butyrate has the advantages of good water resistance, weather resistance, film-forming flexibility, high transparency, and the ability to stabilize the orientation of metals, so it can be used as the main film-forming substance and is widely used in various woodware Paints, glass coatings, plastic coatings, and clears are included in varnishes1. At the same time, cellulose acetate butyrate coating has good adhesion, flexibility, strength, resistance to moisture and oil, UV resistance and abrasion resistance, and provides a good solution for pigments that are not easy to disperse such as carbon black and phthalein. It is a good dispersion medium for blue, phthalogreen, etc. It is widely used in wood coatings.
Disadvantages of cellulose acetate butyrate
The disadvantages of cellulose acetate butyrate are poor oxidation resistance, easy hydrolysis, easy compaction, weak anti-microbial erosion, etc.
How to make cellulose acetate butyrate
The production method of cellulose acetate butyrate includes the following steps: treat fluffy wood pulp or acetate grade refined cotton with acetic acid for 1~4 hours; mix butyric anhydride, acetic anhydride and concentrated sulfuric acid and cool to -5~ 10°C, put the activated fluffy wood pulp or acetate grade refined cotton into the above-mentioned cooled mixture, then add solvent, and acylate at 40-100°C for 1-5 hours
The treatment method of cellulose acetate butyrate products includes the following steps: add the discarded cellulose acetate butyrate products into the adjustment pool, after 12-16 hours of treatment, enter the immobilized photosynthetic bacteria pool for 46-52 hours Treatment; the effluent of the immobilized photosynthetic bacteria pool enters the primary sedimentation tank for 2-3 hours of sedimentation, and then discharges the sedimented water
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