摘要:
The present invention relates to a halogen-free flame-retardant resin composition, based on the weight parts of organic solids, comprising (A) from 1 to 10 parts by weight of bismaleimide resin, (B) from 30 to 60 parts by weight of benzoxazine resin, (C) from 10 to 40 parts by weight of polyepoxy compound, (D) from 5 to 25 parts by weight of phosphorous-containing flame retardant, and (E) from 1 to 25 parts by weight of curing agent, which is amine curing agent and/or phenolic resin curing agent. The present invention further provides prepregs, laminates, laminates for printed circuits prepared from said resin composition.
摘要:
The present invention relates to a halogen-free flame retardant resin composition, according to parts by weight, the resin composition comprises:(A) a mixture of phenoxyphosphazene compound (A 1 ) and compound (A 2 ) having dihydrobenzoxazine ring: 45-90 parts by weight, and the weight ratio of the phenoxyphosphazene compound (A 1 ) and the compound(A 2 ) having dihydrobenzoxazine ring is between 1:25-1:2; (B) an epoxy resin with epoxy equivalent of 500 -2000: 10-45 parts by weight; (C) a phenolic resin: 10-25 parts by weight, and (D) an amine curing agent: 0.5-10 parts by weight. The prepreg, laminate, metal-clad laminate for printed circuit prepared using the halogen-free flame retardant resin composition, have the advantages of high glass transition temperature (Tg), high thermal resistance, low dielectric dissipation factor, low water absorption as well as low C.T.E.
摘要:
The present invention relates to a benzoxazine intermediate and a preparation method thereof. The structural formula of the benzoxazine intermediate is shown by formula (1), R 1 in formula represents O, C=O, S, SO 2 , alicyclic hydrocarbon with 3 to 30 carbon atoms and derivatives thereof, aliphatic hydrocarbon with 1 to 20 carbon atoms and derivatives thereof, or unsaturated aliphatic hydrocarbon with 2 to 20 carbon atoms and derivatives thereof; R 2 is alicyclic hydrocarbon with 3 to 20 carbon atoms and derivatives thereof, aliphatic hydrocarbon with 1 to 20 carbon atoms and derivatives thereof, or unsaturated aliphatic hydrocarbon with 2 to 20 carbon atoms and derivatives thereof. The benzoxazine intermediate of the present invention contains a naphthalene ring structure segment, has desirable heat resistance performance and flame retarding performance, and can be widely applied in composite materials.
摘要:
Disclosed is a halogen-free resin composition. The halogen-free resin composition comprises: (A) 10-60 parts by weight of dicyclopentadiene benzoxazine resin, (B) an epoxy resin, (C) an active ester curing agent and (D) a phosphorus-containing flame retardant, based on 100 parts by weight of the total amount of total organic solid matters of (A), (B), (C) and (D). A prepreg and a laminate which are prepared using the halogen-free resin composition have low dielectric constant, low dielectric loss factor, low water absorption, high dimensional stability, high thermal resistance and good flame retardancy, processability and chemical resistance.
摘要:
The present invention relates to a halogen-free flame retardant resin composition, according to parts by weight, the resin composition comprises:(A) a mixture of phenoxyphosphazene compound (A 1 ) and compound (A 2 ) having dihydrobenzoxazine ring: 45-90 parts by weight, and the weight ratio of the phenoxyphosphazene compound (A 1 ) and the compound(A 2 ) having dihydrobenzoxazine ring is between 1:25-1:2; (B) an epoxy resin with epoxy equivalent of 500 -2000: 10-45 parts by weight; (C) a phenolic resin: 10-25 parts by weight, and (D) an amine curing agent: 0.5-10 parts by weight. The prepreg, laminate, metal-clad laminate for printed circuit prepared using the halogen-free flame retardant resin composition, have the advantages of high glass transition temperature (Tg), high thermal resistance, low dielectric dissipation factor, low water absorption as well as low C.T.E.
摘要:
The present invention provides a siloxane-modified cyclotriphosphazene halogen-free flame retardant, and a preparation method and a use thereof. The siloxane-modified cyclotriphosphazene halogen-free flame retardant has the structural formula as shown in Formula I. In the siloxane-modified cyclotriphosphazene halogen-free flame retardant of the present invention, three kinds of structures of siloxane, aryl phosphorus oxygen compound and cyclotriphosphazene are built in one molecular formula, which combines the advantages of three structures, improves the compatibility between the flame retardant and resins, has a high flame retardant efficiency and a better char formation and can greatly increase the flame retardancy and stability of resin cured products.