Phosphorus series non-halogen composite flame retardant for polyolefin, preparation method thereof and flame retardant polyolefin

Abstract

The invention discloses a phosphorus halogen-free compound flame retardant used in polyolefin, a preparatin method thereof and a flame retardant polyolefin thereof. The flame retardant is prepared through modified red phosphorus, nano-hydroxides dispersant, copolymer emulsion containing carbonyl and unsaturated double bond, comonomer containing carbonyl and unsaturated double bond, and free radical initiator under the high-speed shear force. The flame retardant polyolefin is prepared by the flame retardant of the invention and polyolefin polymers. In improving the dispersivity of red phosphorus, the nano-hydroxides of the invention has synergistic flame retardant effect of red phosphorus and hydroxides, and has the advantages of halogen-free low smoke, the combustion does not produce toxic gases, a little amount of flame retardant is added, and the impact on the mechanical properties of the materials is low. And even an amount of the flame retardant of the invention added in polyolefin is reduced by at least 20 to 50 percent, and the flame retardant level of the polyolefin is capable of achieving FV level.

Description

technical field [0001] The invention relates to the technical field of flame retardants, in particular to a phosphorus-based halogen-free composite flame retardant for polyolefins, a preparation method thereof, and a corresponding flame-retardant polyolefin product. Background technique [0002] Polyolefin is a commonly used polymer material. It has the characteristics of light weight, low price, good fluidity, easy molding, complete variety, and excellent comprehensive mechanical properties. It is widely used in electrical appliances, automobiles, home appliances, film packaging, building materials, pipelines and other fields. However, in order to use it in places with higher flame retardant levels, it is often necessary to add a certain amount of organic or inorganic flame retardants to this flammable polymer material. At present, the polyolefin flame retardants commonly used in actual production are organic halogen flame retardants, such as polybrominated diphenyl ethers,...

AI Technical Summary

Problems solved by technology

Red phosphorus is also one of the commonly used halogen-free flame retardants, but red phosphorus has the following disadvantages: (1) red phosphorus easily absorbs moisture in the air and generates H 3 PO 4 、H 3 PO 3 、H 3 PO 2 and other substances, the red phosphorus becomes viscous and loses fluidity, and the phosphoric acid produced is easier to absorb water, and the red phosphorus will become a slimy substance over time.

Its processing process is complicated, and it has good flame retardant effect when used in oxygen-containing resins such as epoxy resin and polyurethane resin. For the flame retardant of polyolefins, it usually adds a large amount

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