Process for producing highly water absorptive polymer

Details Process for producing highly water absorptive polymer Process for producing highly water absorptive polymer

1991-05-17

1992-02-04

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526123, 526200, 526213, 526217, 526240, 526306, 526265, C08F 3004

Patent

active

050861336

ABSTRACT:
There is provided a process for producing a highly water absorptive polymer, which comprises making up a mixture (A) comprising an aqueous solution of (a) a partially neutralized product of acrylic acid with 20% or more of carboxylic groups being neutralized to an alkali metal salt or ammonium salt, (b) a crosslinking agent having two or more copolymerizable vinyl groups in one molecule, (c) a basic vinyl monomer in a quantity of 20 mol % or less based on said partially neutralized product of acrylic acid, (d) a nonionic surfactant with HLB of 7 or more and (e) an oxidative radical polymerization initiator, said mixture (A) being maintained at a temperature of 50.degree. C. or lower, and a mixture (B) comprising an amine or a reducing agent dissolved in water or in said mixture (A) from which at least the component (e) is removed, and mixing both the mixtures to cause polymerization.

REFERENCES:
patent: 3936441 (1976-02-01), Holst et al.
patent: 4076663 (1978-02-01), Masuda et al.
patent: 4093776 (1978-06-01), Aoki et al.
patent: 4152307 (1979-05-01), Shibahara et al.
patent: 4461874 (1984-07-01), Teyssie et al.
patent: 4486489 (1984-12-01), George
patent: 4525527 (1985-06-01), Takeda et al.
patent: 4554018 (1985-11-01), Allen
patent: 4703067 (1989-10-01), Mikita et al.

Affiliated with

Also associated with

Rating

Process for producing highly water absorptive polymer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing highly water absorptive polymer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing highly water absorptive polymer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-348626