FIELD: aerospace industry.
SUBSTANCE: present invention relates to an aerospace sealant composition, cured sealant, a part, a method for sealing a part and a sealant structure. The sealant composition includes: from 50 to 70 wt.% of simple polythioester prepolymer with terminal thiol groups of the formula 
, from 15 to 21 wt.% of polyepoxide and from 35 to 55 vol.% of a low-density filler. The low-density filler is characterized by specific weight of less than 0.1. The filler contains low-density microcapsules containing aminoplast resin coating. Aminoplast resin contains melamine-formaldehyde resin or urea-formaldehyde resin. Low-density microcapsules with coating are characterized by specific weight in the range from 0.03 to 0.06. The composition is characterized by specific weight of less than 0.9.
EFFECT: reduction in the weight of aerospace aircraft.
21 cl, 5 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| SEALANTS, RESISTANT TO HYDRAULIC FLUID AND FUEL | 2018 |
|
RU2741759C1 |
| ADDITIVE PRODUCTION USING REACTIVE COMPOSITIONS | 2018 |
|
RU2740061C1 |
| FUEL-RESISTANT SULFUR-CONTAINING POLYMER COMPOSITES WITH LOW DENSITY AND APPLICATION THEREOF | 2016 |
|
RU2677151C1 |
| DOUBLE-CURING SEALANTS | 2018 |
|
RU2749514C1 |
| POLYTHIOESTHER-BASED SEALANTS, WHICH ARE CHARACTERIZED BY IMPROVED WORKING TIME | 2015 |
|
RU2672425C1 |
| NON-CHROMATE CORROSION-INHIBITING SEALANTS BASED ON POLYTHIOETHER | 2016 |
|
RU2697663C1 |
| PARTIALLY REACTED SILANE PRIMER COMPOSITIONS | 2016 |
|
RU2683832C1 |
| COMPOSITIONS OF ELECTROCONDUCTIVE SEALANTS | 2012 |
|
RU2573673C2 |
| REACTIVE ANTIOXIDANTS, PREPOLYMERS CONTAINING ANTIOXIDANTS, AND THEIR COMPOSITIONS | 2016 |
|
RU2686330C1 |
| POLYMER MIXTURE, COMPOSITION BASED ON SAID MIXTURE AND METHOD OF REPARING SEALING MATERIAL | 2005 |
|
RU2391363C2 |
