3results about How to "Good smoke suppression" patented technology

The invention discloses a bio-based core-shell structure flame retardant and an application thereof in a bio-based plate. According to the invention, a phosphorus-carbon synergistic flame-retardant core-shell structure flame retardant is developed by taking a phosphorus-containing halogen-free flame retardant as a core and carrying out free radical copolymerization reaction on a furfuryl alcohol (FA) derivative containing phosphorus in different oxidation states and bismaleimide (BMI) with a charring function to form a cross-linked flame-retardant macromolecular shell layer. The core-shell flame retardant is proportionally mixed with crushed materials of a biological base material and an adhesive, and the mixture is subjected to hot press molding to obtain the flame-retardant biological base material. The flame retardant provided by the invention not only can endow a biological base material with good flame retardance and mechanical properties, but also can solve the problem of long-term durability of the biological base material.

The invention relates to the field of flame-retardant materials, in particular to high-flame-retardance epoxy resin and a preparation method thereof. The preparation raw materials of the high-flame-retardancy epoxy resin comprise a material A and a material B, the material A comprises the following raw materials in parts by mass: 100 parts of flame-retardant epoxy resin, 1-2 parts of a dispersing agent and 60-100 parts of an inorganic flame retardant; and the material B comprises the following raw materials in parts by mass: 60-100 parts of a curing agent, 0.1-0.3 part of a catalyst and 60-100 parts of an inorganic flame retardant. Through the synergistic flame-retardant design of the flame retardant and the flame-retardant filler, the problem of poor flame-retardant durability caused by purely adding the flame retardant or using the common filler is effectively solved, the prepared epoxy resin shows excellent flame-retardant property in a UL94 vertical combustion test, and meanwhile, the flame-retardant property of the epoxy resin is improved by reasonably adjusting the proportion of the flame retardant. On the premise of ensuring high flame retardance, the mechanical properties of impact, stretching, bending, compression and the like of the material are considered, and various mechanical indexes are stable and meet the use requirements of the ignition coil.

The application discloses a kind of zinc hydroxystannate coated piperazine modified ammonium polyphosphate composite flame retardant and its preparation method and application.Utilize the electronegative oxygen atom of zinc hydroxystannate and the polar group-NH2 + Form hydrogen bond connection, to build molecular association structure.And by infrared spectrum characterization association-NH2 + Group of the infrared shift of association of the present application successfully prepared zinc hydroxystannate and piperazine modified ammonium polyphosphate mass ratio is 1: (5-20) molecular association flame retardant, the raw materials used have realized industrial production.The beneficial effects of the present application are as follows: preparation process is simple, easy to operate, the mass ratio of zinc hydroxystannate and piperazine modified ammonium polyphosphate of the molecular association flame retardant prepared is 1:20, and when the addition amount in nylon 6 is 10wt%, the limiting oxygen index reaches 30.3%, UL-94 reaches V-0 level, and the smoke suppression effect is remarkable.