FIELD: instrument engineering.
SUBSTANCE: invention relates to instrument making, in particular to compositions for removal of imidised polyimide varnish from articles. Etching composition of the polyimide material contains an organic amine and consists of dimethylsulphoxide (DMSO), dimethylformamide (DMFA). Organic amine is polyethylene polyamine (PEPA). Composition contains components of the following ratio of volume fractions: dimethylsulphoxide – 0.9–1.2; dimethylformamide – 0.9–1.2; polyethylene polyamine – 0.7–0.9.
EFFECT: invention enables to reduce the time for removing the imidised polyimide coating from the surface of articles without mechanical action and using high temperatures.
1 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PRODUCING POLYAMIDE ACID BASED ADDITIVE AND COMPOSITIONS FOR MAKING ANTIADHESIVE, NON-STICK AND ANTIFRICTION COATINGS FOR METAL SURFACES | 2013 |
|
RU2557530C2 |
| 0 |
|
SU272551A1 | |
| COMPOSITIONS FOR HEAT-RESISTANT ANTI-FRICTION SOLID LUBRICANT COATINGS AND METHOD FOR THEIR APPLICATION | 2021 |
|
RU2797943C2 |
| HEAT-RESISTANT PROTECTIVE COATINGS FROM POLYIMIDES BASED ON 3,5-DIAMINOBENZOIC ACID | 2021 |
|
RU2791384C1 |
| METHOD FOR REMOVING COATINGS | 0 |
|
SU992554A1 |
| METHOD OF PRODUCTION OF A FLEXIBLE LACQUER-FOIL POLYIMIDE MATERIAL | 2003 |
|
RU2240921C1 |
| PAINT ALKYD-URETHANE ENAMEL COMPOSITION (VERSIONS) | 2007 |
|
RU2351625C1 |
| POLYIMIDE VULCANISATION CATALYST | 2007 |
|
RU2435798C2 |
| ANTICORROSIVE COMPOSITION FOR CORROSIVE PREVENTION OF STEEL AND REINFORCED CONCRETE SURFACES | 2006 |
|
RU2325415C1 |
| MULTIFUNCTIONAL MASTIC POLYMER COMPOSITION FOR PROTECTIVE COATING | 2010 |
|
RU2467971C2 |
