The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2013
Filed:
Aug. 29, 2010
Yueshan He, Dongguan, CN;
Tao Cheng, Dongguan, CN;
Shiguo Su, Dongguan, CN;
Biwu Wang, Dongguan, CN;
Jie LI, Dongguan, CN;
Yueshan He, Dongguan, CN;
Tao Cheng, Dongguan, CN;
Shiguo Su, Dongguan, CN;
Biwu Wang, Dongguan, CN;
Jie Li, Dongguan, CN;
Guangdong Shengyi Sci. Tech Co., Ltd., Dongguan, Guangdong, CN;
Abstract
The present invention provides a method for improving the flame retardant efficiency of a phenoxyphosphazene compound, and provides a prepreg, a laminate, and a laminate for printed circuit that are made by the method. The present invention compounds a phenoxyphosphazene compound and a dihydrobenzoxazine ring-containing compound in a halogen-free flame retardant resin composition, so as to effectively improve the flame-retardant efficiency of the phenoxyphosphazene compound. Besides, the prepreg, the laminate and the laminate for printed circuit that are made by the method for improving the flame retardant efficiency of a phenoxyphosphazene compound have excellent flame retardancy, chemical resistance, anti-CAF property, high glass transition temperature (Tg), high thermal resistance, low dielectric dissipation factor, low moisture, and low C.T.E, etc. Furthermore, epoxy resins are interfused to greatly overcome the brittleness of the benzoxazine resin, so, the cured resin has comparatively high flexural strength and good processability.