Phosphoric acid quenched creping adhesive
US7718035B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 15, 2005 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Mar 3, 2028 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H25/005
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An improved creping adhesive is prepared by first reacting a dibasic carboxylic acid, or its ester, half-ester, or anhydride derivative, with a polyalkylene polyamine, preferably in aqueous solution, under conditions suitable to produce a water soluble polyamide. The water-soluble polyamide is then reacted with an epihalohydrin until substantially fully cross-linked, and stabilized by acidification with phosphoric acid at the end of the polymerization reaction to form a water-soluble poly(aminoamide)-epihalohydrin creping adhesive that is re-wetable and facilitates water spray removal of buildup so as to lengthen the life of the creping blades, with attendant significant decrease in downtime and maintenance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.