(Meth)acrylic acid polymer and manufacturing method thereof
A (meth)acrylic acid polymer is obtained by conducting a polymerization reaction using 60 mol% or more of a hydrophilic monomer containing (meth)acrylic acid and a combination of at least one kind of persulfate salts and at least one kind of bisulfite salts as an initiator series under conditions th...
Saved in:
Main Authors | , , |
---|---|
Format | Patent |
Language | English French German |
Published |
12.05.2004
|
Edition | 7 |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | A (meth)acrylic acid polymer is obtained by conducting a polymerization reaction using 60 mol% or more of a hydrophilic monomer containing (meth)acrylic acid and a combination of at least one kind of persulfate salts and at least one kind of bisulfite salts as an initiator series under conditions that a pH is smaller than 5 and a degree of neutralization is smaller than 40 mol%, in such a manner that a solid concentration when the polymerization reaction ends is 40% or higher. The resulting polymer has a weight average molecular weight ranging from 3,000 to 15,000, a sulfonic acid group at an end terminal, and an anti-gelling ability Q-value smaller than 2.0, where the anti-gelling ability Q-value is defined as: Consequently, it has become possible to provide a low-molecular-weight (meth)acrylic acid polymer having not only excellent dispersing ability and chleating ability, but also high resistance to gelling, and an efficient manufacturing method of such a polymer. |
---|---|
Bibliography: | Application Number: EP19990301647 |