Patent ID: 6835708
Filing Date: 2004-12-28
Classification: C08F,C08L

Abstract:
A polymer composition, which comprises at least two polymers including a first polymer and a second polymer, where each of said polymers are obtained by a process including the step of polymerizing a monoethylenically unsaturated monomer component onto a chain including a polyether portion and where at least one of said first and second polymers have at least one end structural unit having at least one carbon atom, wherein the monoethylenically unsaturated monomer component includes an unsaturated carboxylic monomer as an essential component,with the polymer composition being characterized in that the difference between the number of carbon atoms in the end structural unit of said first polymer and the number of carbon atoms of an end structural unit of said second polymer is not less than 3, where said structural units are located at both ends of the respective main chain including said polyether portion and where: (i) said end structural unit of a respective polymer is defined as a portion extending from each end ether bond portion, and when there is a difference in number of carbon atoms between the end structural units at each end of the respective polymer, the number of carbon atoms in the end structural unit of the respective polymer is defined as the end structural units of the respective polymer having the largest number of carbon atoms; and (ii) when a chain of a polyether of a respective polymer is derived from an alkylene oxide alone, the number of carbon atoms in the respective end structural unit of the respective polymer is defined as zero.