Application of precipitates of methylene ureas and products obtained
US3959570A · kind A · utility
5Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1974 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | Oct 24, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31982
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of manufacture from a predetermined material, especially from a natural fibrous material and/or synthetic fibrous material of an article, in particular a sheet for printing or reproduction, which combines superior qualities of brightness, opacity, thermal stability, insolubility and lightness, said method consisting of laoding said material throughout its mass or superficially, with a filler product having a base of a methylene urea precipitate with a low degree of polymerization, obtained by the reaction of urea on formaldehyde in an acid medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.