Water-soluble polymer sensitive to salt
US5312883A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1992 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Nov 5, 2012 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M15/263
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A water-soluble polymer which is soluble in tap water, but insoluble in an aqueous solution containing 0.5% or more of a neutral inorganic salt, which is a copolymer of: PA0 (A) 30 to 75% by weight of acrylic acid, PA0 (B) 5 to 30% by weight of a vinyl monomer represented by the following general formula [1]: EQU CH.sub.2 .dbd.C(R)COOR.sup.1 [1] PA0 wherein R represents a hydrogen atom or a methyl group; and R.sup.1 represents an alkyl group having 8 to 12 carbon atoms, and PA0 (C) 20 to 40% by weight of a vinyl monomer represented by the following general formula [2]: EQU CH.sub.2 .dbd.C(R.sup.2)COOR.sup.3 [2] PA0 wherein R.sup.2 represents a hydrogen atom or a methyl group; and R.sup.3 represents an alkyl group having 2 to 4 carbon atoms and in which not more than 50 molar % of the repeating units of derived from the acrylic acid is in the form of a salt. When the polymer is used as a binder for a non-woven fabric or paper, it exhibits satisfactory strength and permeability to a body fluid when the resultant product is wet with body fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.