Heat-sensitizers for coagulating aqueous polymer dispersions

Details Heat-sensitizers for coagulating aqueous polymer dispersions Heat-sensitizers for coagulating aqueous polymer dispersions

C - Chemistry, Metallurgy

09

K

6/134, 400/4112,

C09K 3/00 (2006.01) C08C 1/14 (2006.01) C08F 6/22 (2006.01)

Patent

CA 1078542

ABSTRACT OF THE DISCLOSURE Method for coagulating polymer dispersions with heat sensitizing agents of the general formula (I) R1[- NHCO - (O - CHR2 - CHR3)x - (O - CHR4 - CHR5)y - R6]n where R1 represents an optionally substituted alkyl, cycloalkyl or aryl radical, as remains after the removal of n isocyanate groups from a corresponding n-valent isocyanate; n is a number from 1 to 20; R2 to R5 represent independently or one another hydrogen, C1 - C4-alkyl, phenyl or chloromethyl; x stands for the numbers 1 to 100; y stands for the numbers 0 to 50; and R6 represents O-aryl, O-aralkyl, O-alkaryl, O-CO-alkyl, O-CO- aryl, NH-CO-alkyl, NH-SO2-alkyl or O-alkyl. These new heat sensitizing agents provide at room temperature stable latices which coagulate completely when heated.

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