Abstract:
This disclosure relates to halogen-free flame retardant polycarbonate/thermoplastic polyester molding compositions with improved mechanical properties and increased polyester loading level. More particularly, the disclosure relates to halogen-free polycarbonate/thermoplastic polyester resin alloys with polymeric phosphorus flame retardant additive and siloxane impact modifier. Also included are methods for preparing such compositions and articles there from.
Abstract:
Provided in the present invention are a halogen-free epoxy resin composition, prepreg and laminate using the same, the halogen-free epoxy resin composition comprising: (A) a halogen-free epoxy resin; (B) a crosslinking agent; and (C) a phosphorous-containing phenolic resin, the phosphorous-containing phenolic resin being formed by a synthesis of phenol and formaldehyde with dicyclopentadiene phenol, and being substituted by 9,10-dihydro-9-oxa-10-phosphapheanthrene-10-oxide or a derivative thereof The prepreg and laminate prepared from the halogen-free epoxy resin composition have a high heat resistance, a low dielectric constant, a low dielectric loss factor and a low water absorption rate, and achieve halogen-free flame retardance.
Abstract:
Object of the present invention is to provide halogen-free highly flame retardant styrene impact modified polymers able to perform V0 classification on thin items, according to international standard UL-94.
Abstract:
The present invention relates to a halogen-free resin composition and a prepreg and a laminated board prepared therefrom. The halogen-free resin composition contains the following components in parts by weight: 50-100 parts of an epoxy resin; 20-70 parts of benzoxazine; 5-40 parts of a polyphenyl ether; 5-40 parts of allyl benzene-maleic anhydride; 10-60 parts of a halogen-free flame retardant; 0.2-5 parts of a curing accelerator, and 20-100 parts of a filler. The prepreg and laminated board prepared from the halogen-free resin composition have comprehensive performances such as a low dielectric constant, a low dielectric loss, an excellent flame retardance, heat resistance, cohesiveness and moisture resistance, etc,. and are suitable for use in a halogen-free high multilayer circuit board.
Abstract:
The present invention discloses a phenoxycyclotriphosphazene active ester, a halogen-free resin composition and uses thereof. The phenoxycyclotriphosphazene active ester comprises at least 65 mol.% of a substance having the following structural formula. The halogen-free resin composition comprises 5-50 parts by weight of a phenoxycyclotriphosphazene active ester, 15-85 parts by weight of a thermosetting resin, 1-35 parts by weight of a curing agent, 0-5 parts by weight of a curing accelerator and 0-100 parts by weight of an inorganic filler. The present invention discloses introducing phenoxycyclotriphosphazene active ester into a thermosetting resin, reacting active esters with thermosetting resins, such as epoxy resin, without producing hydroxy groups, which not only satisfies the requirements on being halogen-free and flame retardancy, but also improves the electrical properties (decreasing and stabilizing Dk and Df) of the system, so as to make non-halogenation of high frequency and high speed substrate materials possible.
Abstract:
Disclosed are a halogen-free resin composition, and a prepreg and a laminate prepared by using the same. The halogen-free resin composition comprises the following components according to organic solid matters by weight parts: (A) 40-80 parts by weight of allyl modified benzoxazine resin; (B) 10-20 parts by weight of hydrocarbon resin; (C) 10-40 parts by weight of allyl modified polyphenylene oxide resin; (D) 0.01-3 parts by weight of initiating agent; (E) 10-100 parts by weight of filler; and (F) 0-80 parts by weight of phosphoric flame retardant. The prepreg and the laminate prepared by using the halogen-free resin composition have lower dielectric constant and lower dielectric loss tangent value, higher peeling strength, higher glass transition temperature, excellent heat resistance and good flame retardant effect.
Abstract:
La présente invention concerne un procédé de préparation d'une composition polymère chargée destinée à être réticulée, caractérisé en ce qu'il comprend les étapes suivantes : i. mélanger une composition comprenant un polymère organique, et au moins une charge inorganique, ii. ajouter au mélange de l'étape précédente, un composé silane et un composé générateur de radicaux libres sous l'action de la chaleur, le composé générateur de radicaux libres ayant une température de décomposition inférieure à la température de décomposition de la charge inorganique, et iii. greffer le composé silane au polymère organique, afin d'obtenir ladite composition polymère chargée destinée à être réticulée.
Abstract:
A resin composition contains a tungsten powder, a polyester elastomer, silica, a polysiloxane compound, melamine cyanurate, and substantially no halogen element. Relative to 100% in weight of the polyester elastomer, the total content of silica and the polysiloxane compound is 22% or more in weight, the content of melamine cyanurate is 17% or more, and the total content of silica, the polysiloxane compound, and melamine cyanurate is 45% to 53% in weight. The oxygen index of the resin composition is 26 or more. The number of times of bending a test piece at 90 degrees circumferentially of a 10 mm-diameter column is 1000 or more in a repetitive bending test using the test piece made of the resin composition having its length of 50 mm, its width of 100 mm, and its thickness of 2.25 mm.