Polymerization processes and products therefrom
US4224415A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1958 |
| Grant date | Sep 23, 1980 |
| Priority date | — |
| Expiry date | Jul 18, 1978 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2357/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
1. In a process for preparing a cation exchange resin having a water-insoluble matrix and cation exchange groups bonded thereto, the improvement comprising employing as said matrix a solid copolymer of macroreticular structure which is permeated by small channels or voids into which liquids are able to penetrate, which matrix is prepared by copolymerizing a mixture consisting essentially of (1) a monovinyl carbocyclic aromatic compound or an ester of acrylic or methacrylic acid, with (2) a polyethylenically unsaturated monomer selected from the group consisting of a polyvinyl carbocyclic aromatic compound, an ester of a dihydric alcohol and an .alpha.-.beta.-ethylenically unsaturated carboxylic acid, diallyl maleate, and divinyl ketone; the aforesaid copolymerization being conducted while the monomers are dissolved in 25 to 150% by weight, based on monomer weight, of an organic liquid or mixture of organic liquids which is a solvent for said monomers but is unable to substantially swell the copolymers resulting from copolymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.