Abstract: A phosphorus-containing compound represented by formula (I) and a preparation method thereof are provided. An addition reaction is performed for an organic cyclic phosphorus compound with an aryl aldehyde compound, and then a condensation reaction is performed with an aryl compound having active hydrogen in the use of an organic acid as a catalyst to obtain the proposed phosphorus-containing compound. This phosphorus-containing compound can be used as a hardener for resin, and improves flame retardant properties and thermal resistance for a flame retardant epoxy resin composition, thereby suitably applied to resin compositions used for manufacturing printed circuit boards and laminated circuit boards in electronic or electric products.

Abstract: Disclosed is a flame retarding resin composition comprising (A) one or more epoxy resins; (B) a hardener; and (C) a hardening accelerator, wherein the hardener of the component B is a phosphorus-containing compound represented by the following formula (I): 1

Abstract: Disclosed is an azaoxa heterocyclic compound represented by the following formula (I): 1

Abstract: The present invention discloses a phosphorus- and nitrogen-containing resin hardener, which has a structure represented by the following formula: 1

Abstract: The present invention discloses a phosphorus- and nitrogen-containing resin hardener, which has a structure represented by the following formula: wherein R2 represents a hydrogen atom or a group represented by the following formula: wherein n is an integer of from 0 to 20, and R represents phenylene, naphthylene or a group represented by the following formula: wherein A represents —O—, —S—, —SO2—, —CO—, —CH2—, —C(CH3)2— or a group represented by the following formula: provided that at least one R2 is not a hydrogen atom; and R1 represents NHR2, C1-6alkyl or phenyl; in the above groups represented by R and A, the aromatic group can be substituted by one or more substituents selected from the group consisting of hydroxy, amino, carboxy and C1-6alkyl. The present invention also discloses a flame retarding composition containing said hardener.

Abstract: A phosphorus-containing resin and a flame retardant resin composition containing the same are proposed. The flame retardant resin composition includes a phosphorus-containing resin, a nitrogen-containing resin hardener and a hardening promoter. Since the flame retardant resin composition has an excellent flame retardant property and heat resistance with no halogens contained and no additional flame retardant additives added therein, it can be used for producing prepregs, composite materials, laminates, printed circuit boards, copper foil adhesives, and packaging materials for semiconductors.

Abstract: This invention discloses a novel phosphorus-containing polymer having phenolic units.

Abstract: A phosphorus-containing polymer having phenolic units and an epoxy rein composition are provided. The epoxy resin composition suitably comprises an epoxy resin and a hardener, wherein the epoxy resin may be obtained by reacting the polymer with epihalohydrin, and the polymer may further act as the hardener.

Abstract: The present invention relates to a phosphorus-containing epoxy resin, which is an epoxy resin modified with a side chain having a reactive phosphorus-containing compound.