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    • 2. 发明授权
    • Organopolysiloxane/polyurethane elastomeric block copolymers
    • 有机聚硅氧烷/聚氨酯弹性体嵌段共聚物
    • US4518758A
    • 1985-05-21
    • US423259
    • 1982-09-24
    • Jacques CavezzanChristian Prud'Homme
    • Jacques CavezzanChristian Prud'Homme
    • C08G18/00C08G18/61C08G18/77C08G18/81C08G77/00C08G77/38C08G77/388C08G77/42C08G77/26
    • C08G18/61C08G18/778C08G77/38C08G77/388C08G77/42
    • Novel organopolysiloxane/polyurethane block copolymers which are thermoplastic elastomers and which possess good thermomechanical properties, are comprised of the following recurring units (A) and (B): ##STR1## wherein Z is a divalent radical which comprises a polysiloxane block and has the formula: ##STR2## in which Y and Y' are each a divalent radical having one of the formulae: ##STR3## wherein T and T' comprise the divalent or trivalent residue having from 1 to 20 carbon atoms of an unsaturated isocyanate or alcohol having one of the formulae:OCN--T--CR.sub.1 .dbd.CR.sub.2 R.sub.3HO--T--CR.sub.1 .dbd.CR.sub.2 R.sub.3 ##STR4## or an oxygen, sulfur, silicon, nitrogen, ester or amide interrupted such T or T' residue, and further wherein R.sub.1, R.sub.2 and R.sub.3 are each hydrogen, alkyl or aryl, with the proviso that two of the radicals R.sub.1 and R.sub.2 may together form a single alkylene radical; each R is an alkyl or halogenoalkyl radical having from 1 to 5 carbon atoms and containing from 1 to 7 chlorine and/or fluorine substituents, cycloalkyl or halogenocycloalkyl radical having from 3 to 8 carbon atoms and containing from 1 to 4 chlorine and/or fluorine substituents, aryl, alkylaryl or halogenoaryl radical having from 6 to 8 carbon atoms and containing from 1 to 4 chlorine and/or fluorine substituents, or a cyanoalkyl radical having from 3 to 4 carbon atoms; n is a number of at least 10; G.sub.1 and G.sub.2 are each divalent hydrocarbon radicals having from 2 to 20 carbon atoms, or two such hydrocarbon radicals joined together by a direct valence bond or through an oxygen atom or alkylene or alkylidene bridge having from 1 to 4 carbon atoms; m is a number ranging from 1 to 20; and a is a number which is either zero or 1.
    • 作为热塑性弹性体并具有良好热机械性能的新型有机聚硅氧烷/聚氨酯嵌段共聚物由以下重复单元(A)和(B)组成:其中Z为二价基团 其包含聚硅氧烷嵌段,并具有下式:其中Y和Y'各自为具有下式之一的二价基团:其中T和T'包含具有1或2的2价或3价残基 具有下式之一的不饱和异氰酸酯或醇的至少20个碳原子:OCN-T-CR1 = CR2R3 HO-T-CR1 = CR2R3 或者氧,硫,硅,氮,酯或酰胺中断 这样的T或T'残基,并且其中R 1,R 2和R 3各自为氢,烷基或芳基,条件是基团R 1和R 2中的两个可以一起形成单个亚烷基; 每个R是具有1至5个碳原子并含有1至7个氯和/或氟取代基的烷基或卤代烷基,具有3至8个碳原子并含有1至4个氯和/或氟的环烷基或卤代环烷基 具有6至8个碳原子并含有1至4个氯和/或氟取代基的取代基,芳基,烷基芳基或卤代芳基,或具有3至4个碳原子的氰基烷基; n是至少10的数; G1和G2是具有2至20个碳原子的二价烃基,或两个这样的烃基通过直接键键或通过氧原子或具有1至4个碳原子的亚烷基桥连接在一起; m是从1到20的数字; a是0或1的数字。