KINGFA SCI & TECH CO., LTD. Patent applications |
Patent application number | Title | Published |
20150112004 | HALOGEN-FREE FIRE-RETARDANT POLYAMIDE COMPOSITION AND PREPARATION METHOD AND APPLICATION THEREOF - Disclosed are a halogen-free fire-retardant polyamide composition, and a preparation method and application thereof. The halogen-free fire-retardant polyamide composition is prepared from 35 to 71.5% of a semi-aromatic polyamide, 10 to 35% of a fire retardant and 0 to 50% of an inorganic reinforcing filler, the terminal amino group content of the semi-aromatic polyamide being 80 to 150 mol/t. The halogen-free fire-retardant polyamide composition of the present invention has good heat stability and releases only a small amount of gas in production; mold dirt is not easily formed, and the halogen-free fire-retardant polyamide composition can be produced continuously. | 04-23-2015 |
20140303293 | Heat-Resistant Polyamide Composition and Application Thereof - The present invention discloses a heat-resistant polyamide composition and application thereof. The composition comprises the following components in percentage by weight: 40% to 90% of heat-resistant polyamide resin, 5% to 35% of mineral fiber A, 0 to 35% of mineral filler B, 0.1% to I% of light stabilizer, 0.1% to 1% of flow modifier and 0.1% to 1% of antioxidant. In the present invention, heat-resistant polyamide resin with the ratio of amine-terminated group and carboxyl-terminated group between 0.1 and 0.8 is selected to be matched with deformed glass fibers with an aspect ratio of 2 to 6, the mineral filler B and the flow modifier to obtain the heat-resistant polyamide composition. The heat-resistant polyamide composition not only has high initial whiteness, high reflectivity and excellent heat resistance, but also has good moldability and good dimensional stability; therefore, the heat-resistant polyamide composition is capable of being applied for preparing the reflecting supports for s toll light sources as LCD backlight of portable phones, computers, televisions and the like, as well as headlights of automotive vehicles, instrument panels and lighting appliances, etc. | 10-09-2014 |
20120208977 | METHOD FOR PREPARING TERPOLYMER OF POLY (DIPHENYL ETHER SULFONE) AND POLY (DIPHENYL SULFONE) - A method for preparing series of terpolymer of poly (diphenyl ether sulfone) and poly (diphenyl ether diphenyl sulfone) comprises: adding high temperature organic solvent, stirring and heating; sequentially adding 4,4′-dihydroxydiphenyl, 4,4′-dichlorodiphenyl sulfone and 4,4′-Bis(4-chlorophenyl)sulfonyl-1,1′-biphenyl; after all the monomers are completely dissolved, heating to 100° C. and adding alkali metal carbonate salt-forming agent which is 5-10 mol % more than the amount of 4,4′-dihydroxydiphenyl added, and subsequently adding xylene; continuously heating and salt-forming reaction begins in the system, and controlling the temperature at 190˜210° C.; then heating to 230˜236° C., and maintaining for 3-4 hours to obtain polymer viscous liquid; and refining the polymer viscous liquid to obtain a terpolymer containing different structural units in the molecular chain, wherein the Tg of the terpolymer can be regulated by changing the ratio of the two dichloro-containing monomers. | 08-16-2012 |
20120202967 | Method For Preparing Terpolymer Of Poly (Biphenyl Sulfone Ether) And Poly (Ether Sulfone) - A method for preparing terpolymer of poly (biphenyl sulfone ether) and poly (ether sulfone) comprises: adding high-temperature organic solvent into a flask, stirring and heating to 80° C., adding 4,4′-dichlorodiphenylsulfone,4,4′-Bis(4-chlorophenyl)sulfonyl-1,1′-biphenyl and 4,4′-dihydroxydiphenylsulfone with solid content of 20-35%; stirring until monomers are completely dissolved, heating to 100° C., adding salt-forming agent and xylene; stirring while heating so that salt-forming reaction begins in the system, wherein the system temperature is controlled between 190° C. and 210° C.; when the amount of water discharged reaches the theoretical value, the first stage of salt-forming reaction is finished; heating the system to 230-236° C., and maintaining for 3-4 hours to obtain polymer viscous liquid; and refining the polymer viscous liquid to obtain a terpolymer containing different structural units in the molecular chain, wherein the Tg of the terpolymer can be regulated by changing the ratio of the two dichloro-containing monomers. | 08-09-2012 |