Abstract. The objective of this work was to compound mineral wool with wood particles in the production of particleboards of reduced flammability. Three series of boards with various contents of mineral wool (10, 20, 30 wt%) were successfully manufactured using ureaformaldehyde resin as binder. Thickness swelling, mechanical and thermal properties as well as ignitability of the boards were assessed. It occurred that reduced ignitability is accompanied by a decrease in mechanical performance.

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Malaysia is the biggest producer of palm oil in the world. The production generates over 70 metric tons of waste trunks per hectare during replantation. Such an abundant feedstock should be considered a valuable raw material rather than an agro-waste. An approach for enhancement of low density trunks through the treatment with 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) was investigated. The treatment resulted in a great improvement in the properties of the material: 45 % density gain, water absorption and thickness swelling reduced by 48 and 43 %, respectively, 2.3-fold increase in hardness as well as 3.8-fold and 3.6-fold increase in bending strength and modulus of elasticity, respectively, were observed. Thus, enhancement in the physical and mechanical performance of the material as well as the increased aesthetic value due to the color changes proved the approach to be effective for the conversion of waste biomass to new products.

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Streszczenie-Przedstawiono warunki otrzymywania pianek PUR-PIR z zastosowaniem jako poliolu nowego zwi¹zku boroorganicznego stanowi¹cego produkt reakcji N,N'-di(metylenooksy-3-hydroksypropylo)mocznika z kwasem borowym a tak¿e wyniki oznaczeñ parametrów procesu spieniania oraz badañ w³aoeciwooeci u¿ytkowych tych pianek. Badania te doprowadzi³y do wniosku, ¿e bardzo korzystne jest zastosowanie otrzymanego boranu jako sk³adnika poliolowego i jednoczeoenie uniepalniacza w produkcji pianek poliuretanowo-poliizocyjanurowych (PUR-PIR). Otrzymane sztywne pianki charakteryzuj¹ siê mniejsz¹ kruchooeci¹, wiêksz¹ wytrzyma³ooeci¹ na oeciskanie i zawartooeci¹ komórek zamkniêtych, oraz znacznie ograniczon¹ palnooeci¹ w stosunku do pianki wzorcowej. Uzyskane wyniki wskazuj¹, ¿e opisywany nowy poliol mo¿e byae z powodzeniem stosowany do produkcji sztywnych pianek poliuretanowo-poliizocyjanurowych, poprawiaj¹c w³aoeciwooeci u¿ytkowe tych tworzyw. S³owa kluczowe: poliuretano-poliizocyjanurany, sztywne pianki, otrzymywanie, w³aoeciwooeci mechaniczne, palnooeae, boroorganiczny poliol.