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    • 4. 发明授权
    • Polyurethanes containing perfluoroalkyl groups and a process for their
production
    • 含有全氟烷基的聚氨酯及其制备方法
    • US4540765A
    • 1985-09-10
    • US612095
    • 1984-05-18
    • Ulrich KoemmKlaus Geisler
    • Ulrich KoemmKlaus Geisler
    • D06M15/564B05D5/00C07C271/62C07C311/09C08G18/00C08G18/10C08G18/32C08G18/38C08G18/65C08G18/80C09D175/00C09D175/04D06M15/576
    • D06M15/576C08G18/10C08G18/3812C08G18/3825C08G18/3861C08G18/8077
    • To render surfaces, such as of textile fabrics and fibers, repellent to oil and/or water, they are treated with novel polyurethanes containing perfluoroalkyl ligands and having as recurring structural units ##STR1## with chain ends of the formula--YA.sub.m'in whichX, Y and Z each independently is the skeletal radical of an aliphatic or aromatic di- or polyisocyanate,R.sub.F is a difunctional radical containing at least one perfluoroalkyl ligand, the perfluoroalkyl chain comprising 3 to 30 carbon atoms and, in addition to fluorine atoms, containing at most one hydrogen or chlorine atom to two carbon atoms; and the perfluoroalkyl chain optionally being interrupted by oxygen,n is the number of isocyanate groups on the skeletal radical X and is an integer from 2 to 25,A is an isocyanate group protected by a blocking agent,m is the number of blocked isocyanate groups A on the skeletal radical Y and is an integer from 1 to 5,E is O, S or --NR'--,R' is H, alkyl or aryl,R is the radical of a compound containing at least two alcohol, amine and/or thiol groups,a and b are the number of --OH, --NR'H or --SH functions in the alcohols, amines or thiols R(EH).sub.(a+b) used and each is an integer from 0 to 10, andp is the number of isocyanate groups on the skeletal radical Z and is an integer from 0 to 25.Subsequent heating removes the end blocks and effects chemical fixation on the surface.
    • 为了使诸如织物和纤维之类的表面,对油和/或水的排斥性,它们用新的含有全氟烷基配体的聚氨酯处理,并具有作为重复的结构单元和/或具有式 -YAm',其中X,Y和Z各自独立地是脂族或芳族二异氰酸酯或多异氰酸酯的骨架基团,RF是含有至少一个全氟烷基配体的双官能基团,全氟烷基链包含3至30个碳原子,并且在 含有至多一个氢原子或氯原子至两个碳原子的氟原子; 任选被氧中断的全氟烷基链,n是骨架基X上的异氰酸酯基数,为2〜25的整数,A为被封端剂保护的异氰酸酯基,m为封端异氰酸酯基的数 A为骨架基团Y,为1至5的整数,E为O,S或-NR'-,R'为H,烷基或芳基,R为含有至少两个醇的化合物的基团,胺和 /或硫醇基团,a和b是使用的醇,胺或硫醇R(EH)(a + b)中的-OH,-NR'H或-SH官能团数,并且各自为0至10的整数, 并且p是骨架基团Z上的异氰酸酯基团的数目,并且是0至25的整数。随后的加热除去末端嵌段并且对表面进行化学固定。