| 摘要 |
<p>A binder composed of a graft copolymer of high molecular weight sulfonated lignin material and an acrylic compound. At least 35% by weight of the lignin material has a molecular weight in excess of 5 000 daltons. The binder is produced by reacting the high molecular weight sulfonated lignin material with 0.0125 to 0.5 parts, per part of lignin material, of acrylic acid, methacrylic acid or acrylonitrile. A process for making the binder is also disclosed.</p> |
