CURABLE COMPOSITION CONSISTING OF TWO PARTS AND POLYURETHANE-POLYSILOXANE MIXTURE OBTAINED FROM SAID COMPOSITION Russian patent published in 2011 - IPC C08G18/10 C08L75/04 C08G18/61 C08L83/04 

FIELD: chemistry.

SUBSTANCE: present invention relates to a curable composition consisting of two parts, which is stable during storage in form separate parts and solidifies when merged to obtain an essentially homogeneous polyurethane-polysiloxane mixture. Said composition contains (a) a first dry part containing a moisture-curable silylated polyurethane resin obtained (i) by reacting a polyurethane prepolymer with terminal isocyanate groups with at least one silane selected from a group consisting of mercaptosilaine and aminosilane, and a cross-linking agent for diorganopolysiloxane with terminal silanol groups; (b) a second part containing diorganopolysiloxane with terminal silanol groups; (c) a catalyst for condensation in the first and/or second part; and possibly (d) at least one additional component selected from a group consisting of diorganopolysiloxane with terminal alkyl groups, filler, a UV stabiliser, an antioxidant, an adhesion promoter, a curing accelerator, a thickener, a plasticiser, a moisture absorber, a pigment, a dye, a surfactant, a solvent and a biocide; where the additional component is present in the first and/or second parts of the composition depending on the part with which it is compatible. The invention also describes an essentially homogeneous polyurethane-polysiloxane mixture used as a sealant, adhesive or coating, obtained during solidification as a result of merging the first and second parts of said composition.

EFFECT: obtaining a composition consisting of two parts, which is stable during indefinite storage but undergoes fast solidification upon merging the two parts to obtain a polyurethane-polysiloxane mixture with good weather resistance and high heat resistance.

13 cl, 5 ex, 2 tbl