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    • 74. 发明授权
    • Comb polymers
    • 梳子聚合物
    • US5597871A
    • 1997-01-28
    • US523518
    • 1995-09-01
    • Clemens AuschraJuergen OmeisHorst Pennewiss
    • Clemens AuschraJuergen OmeisHorst Pennewiss
    • C08F8/00C08F8/10C08F290/00C08F290/04C08F299/00
    • C08F290/042C08F8/10
    • The present invention relates to comb polymers KP, produced from macromonomers of formula (I) ##STR1## where X represents a group which comes from the initiator system, preferably an alkyl group with 1-50 C atoms; R1 represents an alkyl group with 1-18 C atoms, preferably 1-10 C atoms, particularly preferably 1-4 C atoms; R2 and R3 each represent an alkyl group with 1-8 C atoms; and B represents a terminal alkene group with at least 2 and not more than 12 C atoms; wherewith the compound of formula (I) is converted, by means which are per se known, to a compound of formula (II) which contains an active hydrogen substituent in the terminal position: ##STR2## where X, R1, R2, a, b, and c are as defined above, and a represents the group B modified by introduction of the active hydrogen function; wherewith the compound of formula (II) in turn is acylated to a macromonomer of formula (IV) by a reagent MR which introduces the (meth)acryloyl group: ##STR3## where X, R1, R2, R3, A, a, b, and c are as defined above, and R4 represents hydrogen or methyl; and the macromonomers of formula (IV) thus obtained are converted to the comb polymers KP by radical polymerization with monomers M chosen from the group comprised of: (meth)acrylic acids of C.sub.1 -C.sub.28 -alkanols, functionalized radically polymerizable monomers, vinyl esters of fatty acids and vinylaromatic monomers.
    • 本发明涉及由式(I)的大分子单体(I)制备的梳状聚合物KP,其中X代表来自引发剂体系的基团,优选具有1-50个C原子的烷基; R1表示具有1-18个C原子,优选1-10个C原子,特别优选1-4 C原子的烷基; R2和R3各自表示具有1-8个C原子的烷基; B表示具有至少2个且不超过12个C原子的末端烯烃基; 通过本身已知的方法将式(I)化合物转化为在末端位置含有活性氢取代基的式(II)化合物:其中X,R 1,R 2 ,a,b和c如上所定义,a表示通过引入活性氢官能团而改性的基团B; (II)化合物又通过引入(甲基)丙烯酰基的试剂MR酰化成式(IV)的大分子单体:其中X,R 1,R 2,R 3,A, a,b和c如上定义,R 4表示氢或甲基; 并且由此获得的式(Ⅳ)的大分子单体通过与单体M的自由基聚合转化为梳状聚合物KP,所述单体M选自:C 1 -C 28 - 链烷醇的(甲基)丙烯酸,官能化的可自由基聚合的单体, 脂肪酸和乙烯基芳族单体。
    • 80. 发明授权
    • Modified styrenepolymers
    • 改性苯乙烯聚合物
    • US4025580A
    • 1977-05-24
    • US315798
    • 1972-12-18
    • Lynn J. Taylor
    • Lynn J. Taylor
    • C08F8/10C08F8/50C08L25/18
    • C08F8/10C08F8/50Y10S260/43
    • There is disclosed a process for preparing chemically modified styrene polymers and copolymers which comprises treating a polystyrene or a styrene copolymer with an acyl halide in the presence of a Lewis acid so as to introduce ketone groups into the treated polymer or copolymer in an amount sufficient to promote environmental photodegradation of the treated polymer or copolymer. The resulting modified polymers may be used as degradable packaging materials, or as additives to promote the environmental degradation of polystyrene and related materials.
    • 公开了一种制备化学改性苯乙烯聚合物和共聚物的方法,其包括在路易斯酸存在下用酰卤处理聚苯乙烯或苯乙烯共聚物,以便将酮基引入经处理的聚合物或共聚物中,其量足以 促进经处理的聚合物或共聚物的环境光降解。 所得改性聚合物可用作可降解包装材料,或用作促进聚苯乙烯和相关材料的环境降解的添加剂。