METHOD OF MODIFYING POLYMER MATERIALS AND METHOD OF PRODUCING POLYMER MATERIAL DECOMPOSITION INHIBITOR Russian patent published in 2012 - IPC C08L101/00 C08L83/04 C08L9/02 C08K13/04 C01B33/40 

FIELD: chemistry.

SUBSTANCE: method of modifying polymer materials involves mixing liquid thermosetting plastics or liquid plastisols of polyvinyl chloride and a decomposition inhibitor based on nanodispersion of montmorillonite, intercalated with metal ions with particle size not greater than 150 nm with metal content of 1-5 wt %. The mixing process is carried out using ultrasound with power of 30-75 W/cm² and frequency 20-50 kHz for 3-10 minutes. Before curing, the obtained composition is vacuum-treated until complete removal of gaseous products. 0.5-5.0 wt % of the inhibitor per weight of the polymer material is used. Preferably, a nanodispersion of montmorillonite intercalated with cerium (Ce³⁺) ions used. The method of producing the decomposition inhibitor involves enrichment of montmorillonite-based layered material (bentonite - Na⁺ form) with sodium ions (Na⁺) by treatment and holding in 5-20% aqueous sodium chloride solution, washing with deionised water and drying the obtained half-finished product. The obtained half-finished product undergoes intercalation using 0.3-20% aqueous solutions of inorganic salts of magnesium, scandium, chromium, manganese, iron, cobalt, nickel, copper, zinc, silver, tin, lead, cerium or combinations thereof. After enrichment and intercalation, drying is carried out at temperature not higher than 110°C.

EFFECT: reduced decomposition in polymer materials under thermal, oxidative factors, improved inhibiting properties of the decomposition inhibitor while simultaneously reducing production cost thereof.

9 cl, 4 dwg, 2 tbl