Molded article of hydrous polymer and process for producing the same
US4296015A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1980 |
| Grant date | Oct 20, 1981 |
| Priority date | — |
| Expiry date | Jan 24, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L57/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A molded article of hydrous polymer obtained by adding an oily substance to a polymer latex or a macromolecular substance latex containing anionic groups and having a polymer concentration of 20-70% by weight, said latex being selected from the group consisting of (a) polymer latexes prepared by emulsion polymerization process, (b) polymer latexes obtained by re-emulsification process and (c) a latex of a natural macromolecular substance, adding a polyvalent metal compound and/or polyether to the resulting mixture and molding the mixture without heating. Said molded article is a novel one satisfying the following three requirements: (1) it is not deformed even when held in hot water, (2) its tack strength does not change with a change of temperature and (3) it is kept soft even below the freezing temperature of water. It is useful as a material which is kept cool for a long time or as a base for plasters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.