38results about How to "Excellent halogen-free flame retardant performance" patented technology

The invention discloses a styrene-based non-halogen flame-retardant injection-grade wood-plastic composite material and a preparation method thereof. The wood-plastic composite material comprises the following components by mass percentage: 25% to 60% of styrene-based resin, 5% to 50% of vegetable fiber, 0.5% to 20% of compatibilizer, 0% to 30% of toughener, 0.5% to 8% of dispersant, 5% to 40% offlame retardant and flame-retardant synergist and 0% to 1% of antioxidant. Compared with the existing wood-plastic composite material, the styrene-based non-halogen flame-retardant injection-grade wood-plastic composite material prepared by the invention has the characteristics of simple production procedure, lower flame-retardant consumption, good non-halogen flame-retardant effect and wide range of forming manners. Therefore, the invention is suitable for various injection-molded parts, such as the housing of electrical products, furnishings, automobile materials, artworks, complex-structured building products and the like.

The invention discloses carboxyl-terminated phosphorus-containing copolyester which is formed by randomly connecting and combining structural units shown as I, II and III according to carboxyl and hydroxyl functional groups, and the Mw of the carboxyl-terminated phosphorus-containing copolyester is 1.1*10<3>-1.3*10<4> g.mol<-1>. The invention further discloses a preparation method of the carboxyl-terminated phosphorus-containing copolyester, a halogen-free flame retardant biology-based pressure sensitive adhesive composed of the carboxyl-terminated phosphorus-containing copolyester and application. The copolyester is biology-based phosphorus-containing copolyester, the halogen-free flame retardant pressure sensitive adhesive formed by the copolyester and renewable resource epoxidized plant oil not only maintains the basic characteristics and good adhesive strength of a biology base, but also achieves the excellent halogen-free flame retardant properties, and the blank of biology-based halogen-free flame retardant pressure sensitive adhesive products is filled up; in addition, preparation is easy and mature, solvent is not used, the cost is low, pollution to the environment is little, and application and popularization are convenient.

The invention provides a novel flame-retardant door and window profile and a preparation method thereof. The door and window profile comprises polycarbonate, ABS (acrylonitrile butadiene styrene) resin, MBS (methacrylate butadiene styrene) resin, composite flame retardant and composite auxiliaries. The preparation method includes the steps: a) mixing raw materials; b) squeezing granulation; c) injection molding. The door and window profile has fine mechanical property, high heat resistance and excellent halogen-free flame retardation, and is extremely wide in application prospect.

The invention discloses a halogen-free flame-retardant type injection molding-class polyolefin wood plastic composite material and a preparation method thereof. The composite material consists of the following components in percentage by mass: 25 to 80 percent of polyolefin resin, 5 to 60 percent of plant fiber, 0.5 to 20 percent of compatilizer, 0 to 30 percent of flexibilizer, 0.5 to 8 percent of dispersant, 5 to 40 percent of flame retardant and flame retardance synergist and 0 to 1 percent of antioxidant. Compared with the conventional wood plastic composite material, the halogen-free flame-retardant type injection molding-class polyolefin wood plastic composite material has the characteristics of simple production flow, little using amount of the flame retardant, good halogen-free flame retardant effect, wide range of molding modes and the like and is applicable to various injection molding products, such as electric appliance shells, automobile parts, furniture, buildings and other parts.

The invention discloses a resin compound which comprises the following components in parts by solid weight: 100 parts of modified bismaleimide prepolymer, 5-30 parts of epoxy resin, 0-20 parts of curing agent, 0-150 parts of filler and 0.001-5 parts of curing accelerator, wherein the modified bismaleimide prepolymer is prepared by pre-polymerizing at least bismaleimide resin with allyl compounds.Compared with the prior art, the resin compound disclosed by the invention has the advantages of high peel strength, halogen-free fire resistance, high heat resistance, high temperature modulus retention rate, excellent toughness, coefficient of thermal expansion and high modulus retention rate. Especially, the resin compound can meet the requirement for halogen-free fire resistance UL94V-0 whilehas excellent high temperature modulus retention rate and low coefficient of thermal expansion, so that the resin compound can be applied to high-performance circuit materials, such as HDI high multilayer substrates.

The invention provides a silicon rubber cable joint, which is to solve the technical problems of susceptibility to aging, bubbling and stripping, low tear resistance and the like of the cable joint in the prior art. The cable joint comprises the following raw materials in part by weight: 35 to 40 parts of vinylsiloxane rubber, 25 to 28 parts of white carbon black, 26 to 31 parts of acetylene carbon black, 1.5 parts of anti-aging agent, 0.3 part of promoter, 3 parts of vulcanizing agent, 2.4 parts of magnesium oxide, 1.4 parts of stearic acid, 3.5 to 5 parts of fire retardant and 1.5 to 2.4 parts of softener. All of the anti-aging performance, breaking strength, elongation at break, tear strength and hardness of the silicon rubber cable joint are improved; in addition, the silicon rubber cable joint also has high electrical performance, anti-tracking performance, halogen-free burning performance and thermal aging resistance, and high mechanical strength and hydrophobicity. Thus, the silicon rubber cable joint can be safely used in strict environment required by current electric equipment.

The invention discloses a UV-curing halogen-free flame-retardant low-shrinkage epoxy resin composition and a preparation method thereof. The composition is prepared from, by mass, 50%-70% of phosphorus-containing flame-retardant epoxy resin prepolymer, 11% -30% of active diluents, 5%-20% of spirocyclic monomers and 2%-4% of positive ion photoinitiator. The preparation method of the phosphorus-containing flame-retardant epoxy resin prepolymer includes the steps of mixing epoxy resin E-51 with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxider, and raising the temperature to enable the mixture to be reacted to prepare the prepolymer. According to the composition and the preparation method thereof, the product is not only high in flame-retardant efficiency, but also small in effect on mechanical performance of epoxy resin; when the content of phosphorus is 1.3%, the cured product LOI reaches 34%, vertical combustion passes through UL 94V-0 level, curing can be performed rapidly under irradiation of UV, the volume shrinkage rate is quite low in the curing forming process, and even zero shrinkage can be reached.

The invention belongs to the technical field of electronic materials, and specifically relates to a preparation method of a coated flame retardant with excellent electrical properties. The preparation method of a kind of coated flame retardant with excellent electrical properties proposed is: select low Dk, low Df core material; the outer surface of the core material is coated with DOPO derivatives as flame retardant layer; the core material The mass ratio to the flame retardant layer is 1:1~1:100; the bulk density of the coated flame retardant is 50 g / L~1000 g / L; the moisture content of the coated flame retardant is 0.01 wt%~5 wt%; the invention not only effectively solves the problem of the interface between the filler and the matrix and the problem of uneven dispersion, but also solves the problem of large dosage and high cost of DOPO derivatives or other filled flame retardants.

Disclosed are a flame-retardant resin composition, and a prepreg and a laminate which are prepared therefrom. The flame-retardant resin composition, based on the solid weight, comprises: 100 parts of a modified bismaleimide prepolymer, 5-30 parts of an epoxy resin, 0-20 parts of a curing agent, 0-150 parts of a filler, and 0.001-5 parts of a curing accelerator, wherein the modified bismaleimide prepolymer is at least formed by prepolymerizing a bismaleimide resin and an amine compound.

The invention relates to a rosin-based reactive flame-retardant curing agent and a preparation method thereof. The rosin-based reactive flame-retardant curing agent described in the technical scheme of the present invention is prepared by reacting rosin-based acid anhydride or rosin-based amine with DOPO, and is prepared by reacting with DOPO. Phosphorus DOPO reacts with rosin-based acid anhydride or rosin-based amine in one step to obtain a halogen-free flame retardant rosin-based curing agent, which can be used in different epoxy resin or bio-based epoxy resin systems. The hydrogen phenanthrene ring structure of the cured product has high glass transition temperature and mechanical properties, and the cured product system has excellent flame retardant effect, and the flame retardant system is a halogen-free system, which meets the needs of today's ecological environment protection. The curing agent can be well mixed with the epoxy resin during processing, and can not only be used as the curing agent of the epoxy resin, but also can effectively improve the flame retardant performance of the epoxy resin.

Disclosed by the present invention are a flame-retardant resin prepolymer, and a resin composition, prepreg and laminate prepared by using same. The flame retardant resin prepolymer is prepolymerized and formed at least by a bismaleimide resin and an amine compound. On the basis of not affecting the performance of the bismaleimide resin, a phosphorus-containing group may be well introduced into a cross-linked network structure of the bismaleimide resin.