Alloy fibers of rayon and an alkali metal or ammonium salt of an azeotropic copolymer of polyacrylic acid and methacrylic acid having improved absorbency
US4240937A · kind A · utility
27Cited by
3References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 3, 1978 |
| Grant date | Dec 23, 1980 |
| Priority date | — |
| Expiry date | Jan 3, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L15/225
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Cardable cellulosic fibers having improved water and fluid absorbency are made by incorporating therein an alkali metal or ammonium salt of a copolymer of acrylic acid and methacrylic acid prepared by a process wherein the two monomers are mixed together in ratios during the polymerization so that the amount of copolymer chains substantially richer in methacrylic acid moieties than the total ratio of acrylic acid and methacrylic acid monomers included in the copolymerization process and the number of copolymer chains considerably lower in degree of polymerization than the copolymer average are minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.