| 摘要 |
1534099 Graft polymers TECHNION RESEARCH & DEVELOPMENT FOUNDATION Ltd 16 Dec 1976 [18 Dec 1975] 52664/76 Heading C3P [Also in Divisions Cl C5 and E1] Graft polymers are obtained by reaction of lignosulphonate with acrylic acid, methacrylic acid or a mixture thereof at a pH between 1-5 and 4 in the presence of an initiator. The lignosulphonate is preferably substantially free of polysaccharides and, after spray drying, the graft polymers may be used for agglomerating particulate materials or as a soil conditioner. |
