Stabilized aqueous solution of a bisulphite blocked polyisocyanate
US3984365A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1975 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | Mar 24, 1995 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M13/395
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An aqueous solution of bisulphite blocked polyisocyanate prepolymers is imparted improved storage stability at temperatures up to about 45.degree. C by incorporation of about 0.5 to 20% by weight (based on the weight of bisulphite blocked prepolymer) of an aromatic or alkyl aromatic sulphonic acid of the formula: EQU R(SO.sub.3 H).sub.n wherein R is an aromatic or alkyl aromatic hydrocarbon group having 6 to 15 carbon atoms and n is an integer from 1 to 3. The solution may also contain up to 80 volume percent (based on the total quantity of solvent) of an organic solvent miscible with water and having a boiling point below about 150.degree.C. This solution may be used to finish paper, leather or textiles and to shrink proof keratin containing textiles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.