6results about How to "Increase char formation" patented technology

The invention discloses a biomass flame-retardant epoxy electronic packaging material and a preparation method thereof.The biomass flame-retardant epoxy electronic packaging material is prepared from epoxy resin and a flame-retardant curing agent, the chemical formula of the flame-retardant curing agent is C32H24B2N4O4, the structural formula of the flame-retardant curing agent is # imgabs0 #, the flame-retardant curing agent contains a benzimidazole-like structure, so that the thermal stability and the char forming amount of the flame-retardant curing agent are improved, and the flame-retardant curing agent does not contain phosphorus or halogen and is environmentally friendly. And only environment-friendly flame-retardant elements nitrogen and boron are contained. And the existence of boron and nitrogen elements has good flame retardant efficiency improvement and smoke suppression performance. Meanwhile, the flame retardant contains active amino groups and can be used for epoxy curing.

The invention relates to the field of adhesive materials, and discloses a preparation method of an anti-aging acrylic pressure-sensitive adhesive protective film, the pressure-sensitive adhesive protective film comprises a base material and a photocuring mixture, and the photocuring mixture comprises an acrylate prepolymer, modified aluminum hydroxide and the like; the acrylate prepolymer comprises 2-ethylhexyl acrylate, methyl methacrylate, acrylic acid, modified hydroxyethyl acrylate, isocyano ethyl acrylate and the like; the modified hydroxyethyl acrylate is prepared by grafting a component I, hydroxyethyl acrylate and isophorone diisocyanate, and the component I is prepared by reacting dibutyl phosphate with glycidyl neodecanoate; octenyl succinic anhydride and 1, 1, 3, 3-tetramethyldisiloxane react and then are grafted with aluminum hydroxide to prepare the modified aluminum hydroxide, the acrylate prepolymer and the modified aluminum hydroxide are added, so that the pressure-sensitive adhesive is endowed with excellent adhesion, high temperature resistance and flame retardance, and the protective film is relatively good in high-temperature aging resistance and damp-heat aging resistance.

The invention relates to the technical field of flame-retardant high polymer materials, in particular to flame-retardant modified expandable graphite and a preparation method thereof.The method comprises the steps that firstly, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is prepared into a dichloromethane solution, then a catalyst and a silane coupling agent are added, the mixture is stirred for a reaction, and the flame-retardant modified expandable graphite is obtained; and finally, carrying out rotary evaporation to obtain a modified oxide, preparing an ethanol solution from the modified oxide, adjusting the pH value to 3-4, carrying out stirring reaction on the ethanol solution and the ethanol solution of the expandable graphite, and filtering and drying to obtain the modified expandable graphite. According to the method, the thermal stability and the charring capacity of the expandable graphite are improved, the problem of non-uniform distribution of the flame retardant is avoided, more carbon layers can be promoted to be generated in the combustion process, and the flame-retardant purpose is achieved; the method is simple to operate and mild in reaction condition, the phosphorus flame retardant and the expansible graphite have a synergistic effect, and the modified expansible graphite is good in thermal stability and high in high-temperature carbon residue amount.

The invention discloses a needle-shaped filling high-stability PVC floor and a preparation method thereof. The needle-shaped filling high-stability PVC floor comprises the following components in parts by mass: 53-56 parts of PVC resin powder, 10-20 parts of magnesium sulfate whiskers, 19-22 parts of a plasticizer, 3-4 parts of a lubricant, 1-2 parts of a first processing aid and 1-2 parts of a second processing aid. The PVC floor contains the magnesium sulfate whiskers, so that the magnesium sulfate whiskers can reinforce, toughen and disperse the impact force on the material and prevent the expansion of cracks, thereby enhancing the bending strength and impact resistance of the PVC floor.

The invention belongs to the technical field of modified polypropylene plastics, and particularly relates to a modified polypropylene plastic added with glass fibers and a preparation method of the modified polypropylene plastic. The modified polypropylene plastic added with the glass fibers is prepared from the following raw materials in parts by mass: 50 to 70 parts of polypropylene, 15 to 25 parts of modified sepiolite / nitrogen-phosphorus composite flame retardant, 10 to 20 parts of flexibilizer, 10 to 15 parts of filler, 8 to 18 parts of modified glass fibers, 3 to 7 parts of antioxidant and 3 to 7 parts of lubricant. The modified polypropylene plastic provided by the invention has excellent mechanical properties (tensile property, normal-temperature and low-temperature impact properties), flame retardance and water resistance.