POLYURETHANE COMPOSITION FOR LOW FLAMMABILITY COATINGS Russian patent published in 2013 - IPC C09D175/14 C09D109/00 C08K3/22 C08K3/32 C08K3/38 

FIELD: chemistry.

SUBSTANCE: present invention relates to a coating composition and can be used in making low flammability coatings for sports fields, floors, roofing and waterproof coatings in construction. The composition contains the following components, pts.wt: 100 - hydroxyl-containing low-molecular rubber, particularly a butadiene homopolymer with molecular weight of 2100-3200 and content of hydroxyl groups of 0.8-1.9 wt % or a copolymer of isoprene and butadiene with monomer ratio of 80:20, with average molecular weight of 3000-3500 and content of hydroxyl groups of 0.7-1.1 wt %; 20-24 polyisocyanate; 0.01-1.00 - urethane-formation catalyst; 10-50 - kaolin and 100-150 chalk as mineral filler; 8-10 - lime screenings as a drying agent; 40-50 - plasticiser; 3.0-5.0 - trifunctional low-molecular alcohol; 0.5-1.5 - 2,6-ditertbutyl-4-methylphenol as an antiageing agent; 1.5-2.0 - oleic acid as a surfactant; 1.0-8.0 - pigment and a combination of 12-20 - ammonium polyphosphate, 2-30 - aluminium oxide and 30-40 - sodium tetraborate pentahydrate (borax pentahydrate) as flame-retardants.

EFFECT: improved anti-fire properties of the cured material while maintaining an acceptable level of rheological properties of the composition for a free-casting method of forming coatings.

6 ex, 2 tbl