| 摘要 |
Water-soluble graft polymers are described which have been produced by a) radical grafting of a polyalkylene oxide of the general formula I <IMG> in which R1 = -H, -CnH2 n+1, -C6H4 -CnH2 n+1, <IMG>, <IMG>, -(CH-R2)m NHR2, -(CH-R2)mOH, -(CH-R2)m -COOH, -CO-R5 R2 = -H, -CH3, -C2H5 R3 = -H, CnH2 n + 1 , -CmH2m -SO3Na, -(CH-R2)m NHR2, -(CH-R2)mOH, -(CH-R2)m -COOH, -CO-R5 R4 = -H, -(CH-R2)m -COOH, -CO-R5 R5 = -CmH2 m+1, -C6H5, -(CH-R2)m -COOH, -C6H4 -COOH n denotes 1 - 18, m denotes 1 - 5, x denotes 2 - 200, y denotes 0 or 1 with an ethylenically unsaturated mono or dicarboxylic acid or their anhydride and subsequently b) derivatising with a primary or secondary amine and/or alcohol. These graft polymers are suitable as dispersants for inorganic binding agents containing water such as e.g. cement, gypsum, anhydrite.
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