Abstract:
A modified bismaleimide resin is made by modify bismaleimide with aromatic diamine that contains fluoro substituents through chain-growth polymerization; and modified bismaleimide resin is excellent in physical properties including a low dielectric constant Dk (3 GHz) less than 3.0, a dissipation factors (3 GHz) less than 0.02, a low resin water absorptivity ranging from 0.21% to 0.33% and an excellent processability, and is particularly suited for producing a copper clad laminate that is required to have dielectric constant Dk (3 GHz) less than 3.
Abstract:
An inorganic filler coated with molybdenum compound used as an additive is added into a resin mixture in an amount of 20 to 80 wt % of the resin mixture, resulted in that printed circuit boards if made from a laminate or a prepreg containing the resin mixture have properties of a low coefficient of thermal expansion, good heat tolerance and excellent drilling processability.
Abstract:
A thermosetting resin composition comprises a thermosetting polybutadiene resin, a thermosetting polyphenylene ether resin that is ended with styrene and acrylate in a weight ratio of 0.5-1.5 as reactive functional groups, a thermoplastic resin that serves to set desired heat resistance, flowability and filling performance, a compound cross-linking initiator composed of peroxides of different half-life temperatures to effectively improve its crosslink density during its thermal curing process; particularly the composition after cured has a low dielectric constant, a low dielectric dissipation factor, a high Tg, and high rigidity, and the prepreg made thereof is easy to cut.
Abstract:
A fluorocarbon resin composition is applicable to produce a prepreg for use in making a high-frequency circuit board, including a polytetrafluoroethylene resin; a fluorine-containing copolymer of poly fluoroalkoxy or fluorinated ethylene propylene; inorganic powders and an impregnation additive such as hydroxyethyl cellulos; resulted in that the prepreg is capable of increasing a plurality of times for proceeding impregnation-coating, the surface defects prone to occur on a fluorocarbon prepreg during drying, baking and sintering after impregnation are therefore improved at the same time.
Abstract:
A process for preparing PPE microspore dispersion includes steps of: dissolving a high-molecular polyphenylene ether in a first solvent at 45-110° C. to form a dissolution liquid; adding processing aids and well mixing the dissolution liquid into a dispersed phase; cooling the dissolution liquid to 42-80° C., and adding a second solvent to generate PPE microspores via PPE to wrap around the processing aids; cooling the dissolution liquid to 0-40° C. to obtain PPE microspore dispersions for use in application for impregnation processes performed below 40° C., thereby high-temperature impregnation equipment are no longer needed, and copper clad laminates made of using the PPE microspore dispersion enjoy excellent physical properties including high Tg, low Dk, low Df and high copper foil's peel strength.
Abstract:
A fluorocarbon resin composition is applicable to produce high-frequency circuit boards including a polytetrafluoroethylene resin; a fluorine-containing copolymer such as poly fluoroalkoxy and fluorinated ethylene propylene; low molecular-weight PTFE micro-powders and inorganic powders; in particular the temperature of pressing copper foil substrates is lowered from 350° C. to 250° C. via a lowering temperature rate of 1 to 4° C./min to improve the crystallinity of the fluorocarbon resin composition as well as improve the copper foil substrate with a high thermal conductivity and a wide range of dielectric constant.
Abstract:
A process for producing a modified polyphenylene ether resin having a purity of more than 99.4%, comprising steps of graft modification, water rinse, and extraction as well as phase splitting, is disclosed that step of separating out powder during purification is no needed, and the solvent for use in performing dissolving of or/and extraction of polyphenylene ether resin can be recycled for future use, so that the manufacturing process is simple and uses less solvent as compared to the prior art, and further helps to conserve resources and is environmentally friendly.
Abstract:
A thermosetting resin composition due to containing a modified PPE resin as a main ingredient is suited for use in making a pregreg or a copper foil substrate, when hardened, featuring a small dielectric constant (Dk), a low dielectric dissipation factor (Df) and a high Tg as well as a high resistance to heat and flame, this outstanding result is because the modified PPE resin is formed with a novel two-dimensional hardenable structure prepared to have side-chain reactive functional groups being provided in addition to those at the terminal ends of the main chain of the PPE resin thereof.
Abstract:
A thermosetting resin composition contains a primary resin formed from mixing a styrene-type polyphenylene ether resin thermally modified with styrene with an acrylic-type polyphenylene ether resin thermally modified with acrylic at a weight ratio ranging between 0.5 and 1.5, consequently having excellent heat resistance, flowability, and filling ability; and when cured, having a dielectric constant smaller than 3.0 and a dielectric dissipation factor smaller less than 0.0020 at the frequency of 1 GHz as well as a glass transition temperature higher than 210° C.; in application, the composition is suitable to impregnate reinforcement to form prepregs with excellent cutability.
Abstract:
A phenolic-type phosphorous curing agent works by grafting a phosphorous compound onto a benzene ring to substitute hydrogen atoms and is halogen-free and nonflammable; when acting with and curing an epoxy resin, the curing agent helps to form a higher crosslink density and excellent heat tolerance to let the epoxy resin suitable for use in making PCB's insulating layer or semiconductor packaging as well as to endow the PCB's insulating layer or semiconductor packaging provided with excellent flame retardance and high glass transition temperature (Tg).