栲胶（tannin extract）是由富含单宁的植物原料经水浸提和浓缩等步骤加工制得的化工产品。通常为棕黄色至棕褐色，粉状或块状。主要用于鞣皮，制革业上称为植物鞣剂。此外还用作选矿抑制剂、锅炉水处理剂、钻井泥浆稀释剂和金属表面防蚀剂，凝缩类栲胶也作木工胶粘剂。
研究了毛杨梅栲胶的磺甲基化改性方法。
The method of sulfomethylation modification of bayberry tannin extract was investigated.
结果表明改性栲胶溶液黏度下降，相对分子质量降低且分布集中。
It shows that the solution viscosity drops and the relative molecular mass reduces with narrow distribution.
主要讨论栲胶法脱硫在生产中对栲胶溶液吸收和再生的诸多影响因素。
Influencing factor was discussed for tannin extract solution absorb and regenerate by tannin extract method in production.
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