Aqueous compositions of polyimides containing hetero-polysaccharide
US4013600A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 1975 |
| Grant date | Mar 22, 1977 |
| Priority date | — |
| Expiry date | May 16, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Pseudoplastic aqueous suspensions are provided having good storage stability. These suspensions are of a prepolymer powder prepared from A. a imide group-containing compound chosen from the group consisting of: PA1 A. a bis-imide of the formula: ##STR1## in which D represents a divalent radical which has the formula: ##STR2## wherein Y represents H, CH.sub.3 or Cl and m is equal to 0 or 1, and A represents a divalent organic radical containing 2 to 30 carbon atoms, and PA1 B. a mixture of a bis-imide of formula (I) and a mono-imide of the formula: ##STR3## in which D is as defined above and R represents a hydrogen atom or a monovalent organic radical containing 1 to 20 carbon atoms, and B. an amino compound chosen from the group consisting of: PA1 A. one or more polyamines containing 2 to 5 primary or secondary amino groups, at least one of these groups being primary, PA1 B. a mixture comprising one or more polyamines as defined under a) and one or more primary and/or secondary monoamines and/or one or more secondary polyamines, and PA1 C. a polyamine of the general formula: ##STR4## in which x represents a number from 0.1 to 2 and R' represents a divalent hydrocarbon radical with …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.