Monomolecular intumescent flame retardant MPPR and MPPR/POSS composite synergistic halogen-free flame-retardant polypropylene composite material

Abstract

The invention provides a monomolecular intumescent flame retardant MPPR and MPPR / POSS composite synergistic halogen-free flame-retardant polypropylene composite material, and particularly relates to a monomolecular intumescent flame retardant MPPR and a preparation method thereof, an MPPR flame retardant polypropylene composite material containing the monomolecular intumescent flame retardant MPPR and a preparation method of the MPPR flame retardant polypropylene composite material, and an MPPR / POSS composite synergistic halogen-free flame-retardant polypropylene composite material and a preparation method of the MPPR / POSS composite synergistic halogen-free flame-retardant polypropylene composite material. The monomolecular intumescent flame retardant MPPR comprises the following raw material components: phytic acid, polyol and melamine, wherein the molar ratio of phytic acid to polyol to melamine is 1:(2.4-2.6):(1.9-2.1). The preparation method of the monomolecular intumescent flame retardant MPPR comprises the following steps: stirring phytic acid and polyol to react, and then adding melamine to react. The prepared flame-retardant polypropylene composite material is high in flame-retardant efficiency and high in mechanical strength, and can meet the requirements of flame-retardant PP on high-strength and high-modulus application occasions.

Description

technical field [0001] The invention belongs to the technical field of monomolecular intumescent flame retardants, and relates to a monomolecular intumescent flame retardant MPPR and an MPPR / POSS composite synergistic halogen-free flame-retardant polypropylene composite material, specifically, a monomolecular intumescent flame retardant Burning agent MPPR and its preparation method, and MPPR / POSS composite synergistic halogen-free flame-retardant polypropylene composite material and its preparation method. Background technique [0002] Polypropylene has excellent comprehensive properties and is widely used, but the full carbon and hydrogen chain structure of polypropylene makes PP extremely flammable, and when burned, it will produce a large number of flaming molten droplets, releasing a large amount of heat, which can easily spread flames and cause fires, endangering people. The safety of life and property seriously restricts its application in some fields that require high...

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Problems solved by technology

[0012] Therefore, although the authorized patented technical solution still has good flame retardant performance under laboratory test conditions, based on the theoretical analysis of its flame retardant composition , the overall carbon content of PAMA is low. When the matrix material is ignited, its carbonization speed is slow, and the non-combustible gas generated by the decomposition of the gas source may lift or blow the carbon layer, and cannot form an effective expanded carbon layer structure to isolate the matrix from the external heat. Oxygen contact, it is difficult to self-extinguish when a large area of ​​fire occurs, and the ideal flame retardant effect cannot be achieved

[0013]However, if on the basis of the technical content of this patent, further add and use a component (such as pentaerythritol) as a carbon source for compound preparation, as in the background technology of this authorized patent Record: "...In practical applications, it often needs to be used in combination with some substances that act as carbon sources (such as pentaerythritol) to have a better effect, and at the same time require a higher amount of addition

"According to the existing technology, it is known that the ratio of ammonium polyphosphate, melamine, and pentaerythritol in traditional single-molecule intumescent flame retardants is usually about 2:1:1, so it is indeed necessary to add higher The amount of pentaerythritol added, but the addition of phytic acid is too low at this time, resulting in a decrease in phosphorus content, which will greatly affect the flame retardant performance

[0014] At the same time, because the acid source, gas source, and carbon source system of phytic acid, melamine, and pentaerythritol are three-component systems, and both melamine and pentaerythritol are multifunctional compounds , there are multiple groups that can form chemical bonds with the six phosphate groups in phytic acid, and it is impossible to determine the most suitable reaction synthesis ratio through the chemical structure of each other

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