COMPOSITE MATERIAL FOR MAKING STREET FURNITURE AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2024 - IPC C04B26/02 C04B16/00 C08K9/04 

FIELD: production of construction materials.

SUBSTANCE: present invention relates to production of construction materials, particularly polymer composites for making street furniture. Composite material includes a polystyrene matrix with filler — hazelnut shell powder with a polystyrene shell obtained by holding hazelnut shell powder in a polystyrene solution in toluene at the following ratio, wt.%: hazelnut shell powder 18–38; toluene 60–80; polystyrene 2, with the following ratio of components of the composite material, wt.%: polystyrene 62–82; modified hazelnut shell powder 18–38. Method of producing composite material for creating outdoor furniture involves grinding a component of hazelnut shell for 3 minutes, washing with distilled water at least 5 times and holding in a drying oven for 60 minutes at temperature of 150 °C, sieving filler through 64 mcm sieve, modifying the filler, which includes: holding in said polystyrene solution in toluene for 3 days and ultrasound treatment every 24 hours for 60 minutes at frequency of 40 kHz, drying for 120 minutes at temperature of 95 °C with further grinding in a mill for at least 10 minutes and sieving through 64 mcm sieve; grinding polystyrene for 3 minutes with subsequent mixing of modified filler and crushed polystyrene, loading into a mould with further heating to 16 °C for 60 minutes, pressing under pressure of 110 MPa with load holding during 5 minutes.

EFFECT: improved physical and mechanical characteristics and low water absorption of the material for making street furniture, recycling the shell.

2 cl, 3 tbl