Abstract: Application of a Mannich base in a flame-retardant polyurethane material is provided. The Mannich base has a structure represented by a formula (I). In the Mannich base, flame-retardant groups, i.e., halogens are introduced at the second, fourth and sixth positions of a phenyl group, and flame-retardant elements, i.e., halogens and nitrogen are introduced into synthesized polyether polyol, giving the synthesized polyether polyol good flame retardance. The amount of active hydrogen in the Mannich base is small so that occurrence of side reactions during the synthesis of the polyether polyol is reduced, and the viscosity of the flame-retardant polyether polyol is lowered. Due to autocatalytic performance of tertiary amido in the flame-retardant polyether polyol, use of a catalyst can be reduced and even avoided during the synthesis. A preparation method of the Mannich base is also provided.

Abstract: A flame-retardant polyether polyol is provided, including a Mannich base and an epoxide. The epoxide is selected from ethylene oxide, propylene oxide and butylene oxide. The Mannich base has a structure represented by a formula (I). In the Mannich base, flame-retardant groups, i.e., halogens are introduced at the second, fourth and sixth positions of a phenyl group, and flame-retardant elements, i.e., halogens and nitrogen are introduced into synthesized polyether polyol. The amount of active hydrogen in the Mannich base is small so that side reactions during synthesis of the polyether polyol are reduced, and the viscosity of the polyether polyol is lowered. A flame-retardant polyurethane material is also provided, synthesized from raw materials comprising the above-mentioned flame-retardant polyether polyol and an isocyanate. Due to autocatalytic performance of tertiary amido in the flame-retardant polyether polyol, use of a catalyst can be reduced and even avoided during the synthesis.

Abstract: A composition capable of substituting the use of styrene-acrylonitrile copolymer POP, comprising polyether polyol A having a hydroxyl value of 100-1000 mgKOH/g and a functionality of 4-8, and a polymer polyol having a hydroxyl value of 12-100 mgKOH/g, a functionality of 2-4, and a solid content of 4-45%, the branches thereof not containing polystyrene units. The polyurethane foam produced using the present composition to substitute the use of traditional styrene-acrylonitrile copolymer POP avoids the problem of styrene volatilisation due to the absence of styrene, and the produced polyurethane foam also maintains equivalent or even superior physical properties compared to the polyurethane foam made from styrene-acrylonitrile copolymer POP in the prior art; thus, the present compound is fully capable of substituting traditional styrene-acrylonitrile copolymer POP for the production of environmentally friendly, high rebound, and block-shaped soft polyurethane foam materials.

Abstract: A composition capable of substituting the use of styrene-acrylonitrile copolymer POP, comprising polyether polyol A having a hydroxyl value of 100-1000 mgKOH/g and a functionality of 4-8, and a polymer polyol having a hydroxyl value of 12-100 mgKOH/g, a functionality of 2-4, and a solid content of 4-45%, the branches thereof not containing polystyrene units. The polyurethane foam produced using the present composition to substitute the use of traditional styrene-acrylonitrile copolymer POP avoids the problem of styrene volatilisation due to the absence of styrene, and the produced polyurethane foam also maintains equivalent or even superior physical properties compared to the polyurethane foam made from styrene-acrylonitrile copolymer POP in the prior art; thus, the present compound is fully capable of substituting traditional styrene-acrylonitrile copolymer POP for the production of environmentally friendly, high rebound, and block-shaped soft polyurethane foam materials.