Process for the manufacturing of graft polymers of polysaccharides or polypeptides or its respective derivatives, obtainable by free radical induced co-polymerization of
A) a monomer selected from or a monomer mixture of
(a) from 20 to 100% by weight of acrylic acid or methacrylic acid or of a mixture thereof or of the alkali metal, alkaline earth metal or ammonium salts thereof,
(b) from 0 to 80% by weight of other monoethylenically unsaturated monomers which are copolymerizable with the monomers (a) and
(c) from 0 to 5% by weight of monomers having at least 2 ethylenically unsaturated, nonconjugated double bonds in the molecule,
in the presence of either
B1) polysaccharides, oxidatively, hydrolytically or enzymatically degraded polysaccharides, oxidized hydrolytically degraded or oxidized enzymatically degraded polysaccharides, or such chemically modified degraded products, chemically modified mono-, oligo- or polysaccharides or mixtures of the stated compounds or
B2) polypeptides, hydrolytically or enzymatically degraded and optionally chemically modified polypeptides or mixtures of the stated compounds
in a weight ratio A:(B1 or B2) of from 1:99 to 18:82,
wherein the components of the monomers of A) are added to B1) or B2) in an inert solvent at a temperature of 40 to 150 °C in the presence of a free radical-forming initiator, characterized in that at least 50% of the radical-forming initiator are with the component B1) or B2) before the addition of the monomers A) and the rest is added together with the monomers of A).
多糖或
多肽接枝聚合物或其各自衍
生物的生产工艺,可通过以下物质的自由基诱导共聚合获得
A) 以下单体或单体混合物
(a) 重量百分比为 20%至 100%的
丙烯酸或
甲基丙烯酸或其混合物或其碱
金属盐、碱土
金属盐或
铵盐、
(b) 0 至 80%(以重量計)可與單體(a)共聚的其他單
乙烯不飽和單體,及
(c) 0-5%(按重量计)分子中至少有 2 个
乙烯不饱和非共轭双键的单体、
在以下任一种物质存在的情况下
B1)
多糖,氧化、
水解或酶降解
多糖,氧化
水解降解或氧化酶降解
多糖,或此类
化学修饰降解产物,
化学修饰
单糖、
寡糖或
多糖,或上述化合物的混合物,或
B2)
多肽、经
水解或酶降解的
多肽或经
化学修饰的
多肽或上述化合物的混合物
A:(B1 或 B2) 的重量比为 1:99 至 18:82、
其中 A)单体的组分在 40 至 150 °C的温度下,在惰性溶剂中,在自由基形成
引发剂的存在下加入到 B1)或 B2)中,其特征在于在加入 A)单体之前,至少 50%的自由基形成
引发剂与 B1)或 B2)组分在一起,其余的与 A)单体一起加入。