Polyetherols from melamine and alkylene carbonates: Properties and application of foamed polyurethanes

Abstract

Some results are presented on the applications of polyetherols obtained in reactions of melamine with alkylene carbonates for preparation of foamed polyurethanes. Physical properties of the polyetherols and the parameters of their use are evaluated. Selected properties of polyurethane foams obtained by using the polyetherols, such as apparent density, uptake volume, linear shrinkage, and flammability, are presented. Thermal properties of the products have been found to be much better than those of traditional polyurethane foams.

Preparation and properties of polyurethane foams from hydroxypropoxy derivatives of urea and isocyanates

“…The foams obtained from product of reaction between BHPU and 14-molar excess of PC (BP14) showed polymerization shrinkage (Table 3, comp. [8][9][10][11][12][13][14]. The best results were obtained when TEA and water content was 4.29 and 2 wt.-%, respectively, while the ratio of OH to NCO in starting mixture was 1:1.75 (Table 3, comp.…”

“…To 5 g of hydroxypropoxy derivatives of urea, 0.1g of surfactant (Silicon 5340, Houdry Hülls), 1.07-4.29 wt.-% of triethylamine (TEA) catalyst (pure, Avocado, Germany), and 0-2 wt.-% of water were added. After careful mixing of the components, a pre-weighed amount of 4,4'-diphenylmethane diisocyanate (pure, Merck, Germany) was added, calculated as described in [10]. The amounts of diisocyanate and water were adjusted to give OH: NCO molar ratio varying from 1:1.5 to 1:2.0.…”

Melamine Polyphosphate – the Reactive and Additive Flame Retardant for Polyurethane Foams

“…Oligoetherol (10 g), 2% water, silicone L-6900 (pure, Houdry Hülls, USA) surfactant, and triethylamine (pure, POCH, Poland) catalyst were placed in 500 cm 3 cup, homogenized by stirring, then polymeric diphenylmethane 4,4'-diisocyanate (pMDI, containing 30 mass% of three-functional isocyanates, Merck, Darmstadt, Germany) was added and the mixture was stirred mechanically at 1800 rpm until creaming started. Other composi-tions were also prepared, in which the MPP was added as additive flame retardant after homogenization of oligoetherol, water, silicone and triethylamine.…”

“…3 Classic PUFs undergo decomposition at temperatures above 90 °C, 4,5 while trPUFs with 1,3,5-triazine rings are resistant against long lasting heating even at 200°C . 6 This renders them useful materials as thermal isolators.…”

Obtaining of polyurethane foams with contribution of hydroxyalkylation products of oxalamide with alkylene carbonates and their properties

“…To 5 g of a polyol, 0.1 g of surfactant (Silicon 5340, Houdry Hülls), 0.5-2.0 wt.-% of triethylamine (TEA) catalyst (pure, Avocado, Germany), and 2 wt.-% of water were added. After careful mixing of the components, a pre-weighed amount of 4,4' diphenylmethane diisocyanate (pure, Merck, Germany) was added, calculated as described in [15]. The amounts of diisocyanate and water were adjusted to maintain OH : NCO molar ratio varying from of 1 : 1.50 to 1 : 2.65.…”