Polyurethane latex sizing agents for the paper industry and their method of manufacture
US4617341A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1985 |
| Grant date | Oct 14, 1986 |
| Priority date | — |
| Expiry date | May 20, 2005 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/57
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A sizing agent for the paper industry comprising a cationic oligourethane latex; said urethane having the formula: ##STR1## in which R.sub.2 is an alkylene radical containing a C.sub.2 -C.sub.6 radical or a polyoxyalkylenic radical of a degree of polycondensation of 1 to 4, PA0 R.sub.3 is an alkyl radical containing at least 7 carbon atoms, and PA0 R.sub.4 and X represent the remainder of the quaternizing agent R.sub.4 X with PA0 (a) R.sub.1 representing ##STR2## R.sub.5 being an aliphatic radical containing C.sub.4 as a maximum and n varying from 1 to 3; or PA0 (b) R.sub.1 representing ##STR3## R.sub.5 being ##STR4## in which R.sub.2, R.sub.3, R.sub.4 and X having the preceding definitions and n varying from 2 to 6; and the method of making the oligourethane latex.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.