HIGH-STRENGTH WATERPROOF ORGANOCOMPOSITE AND PREPARATION METHOD THEREOF Russian patent published in 2016 - IPC D06M15/572 C08L63/00 D06M10/02 C08J5/24 C08J5/06 C08G59/40 B82Y30/00 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to production of light-weight high-strength water-resistant organocomposites based on fibrous fillers of ultrahigh molecular weight polyethylene (UHMWPE) and polymer binder and can be used in elements of structures in various engineering fields: aviation, machine-shipbuilding, chemical and defense, etc. Disclosed is a high-strength waterproof organocomposite made of fibrous filler based on high-strength high-modulus multi-filament polyethylene fibres and polymer binder based on epoxy resin with amine curing agent. Surface of filler is pretreated in barrier discharge plasma with impact of pulse barrier discharge in air at atmospheric pressure when exposed to alternating voltage with frequency of 10-50 kHz, with specific power of discharge of 50-500 W/m², at rate of treatment of 0.3-7 m/min. Method then comprises treatment with acetone of a solution suspensions metal-containing nanostructures in carbon-polymer media. Filler is then dried, impregnated with polymer binder prepared by mechanical mixing of components, and organic composite is moulded with hardening temperature not higher than 75 °C. As epoxy resin of polymer binder, organocomposite contains a mixture of epoxy-diane (A) and epoxy-aliphatic (B) oligomers in ratio A:B from 10:1.3 to 10:3. As amine curing agent - eutectic mixture of metaphenylenediamine (MPDA) and 4,4′-diaminodiphenylmethane (4,4′-DADPM) at following weight ratio from 22:78 to 78:22; and additionally contains a mixture of oligoester-cyclocarbonates, urethane prepolymer. Ratio of components in organocomposite, pts.wt: fibre filler - 250-700; epoxy-diane oligomer (A) - 100; epoxy-aliphatic oligomer (B) - 13-30; mixture of oligoester-cyclocarbonates - 10-20; urethane prepolymer - 5-25; eutectic mixture MPDA + 4,4′-DADPM - 28-45.

EFFECT: invention improves physical and mechanical properties and water resistance of organic composite while providing environmental friendliness and simple process during implementation of industrial production.

7 cl, 1 dwg, 3 tbl, 6 ex