Flame-retardant phosphorus-modified epoxy resins
AssigneeClariant GmbH
InventorSebastian Hörold
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Abstract
The present invention relates to novel flame-retardant phosphorus-containing epoxy resins with an epoxy value of from 0.05 to 1.0 moll 100 g containing structural units which derive from (A) polyepoxy compounds having at least two epoxy groups per molecule, and (B) organic phosphinic acids. The invention further relates to a process for their preparation, and to their use. Besides their flame retardancy, the novel flame-retardant phosphorus-containing epoxy resins have especially good storage stability.
Claims14
A flame-retardant phosphorus-modified epoxy resin with an epoxy value of from 0.05 to 1.0 mol/100 g containing structural units derived from:
- (A) polyepoxy compounds having at least two epoxy groups per molecule, and
- (B) organic monoalkylated/arylated phosphinic acids.
A process for preparing flame-retardant phosphorus-modified epoxy resins from epoxy resins and organic monoalkylated/arylated phosphinic acids as in formula (II), which comprises reacting the polyepoxy compounds of (A) and the organic monoalkylated/arylated phosphinic acids of (B) with one another.
A process for preparing flame-retardant phosphorus-modified epoxy resins from epoxy resins and organic monoalkylated/arylated phosphinic acids as in formula (II) which comprises reacting the polyepoxy compounds of (A) and the organic monoalkylated/arylated phosphinic acids of (B) with one another, and wherein the reaction with the monoalkylated/arylated phosphinic acids as in formula (II) takes place first at temperatures from 80 to 120° C. until the acid function has been consumed in the reaction and then continues at temperatures of from 150 to 180° C., in the presence of catalysts.
A process for preparing flame-retardant phosphorus-modified epoxy resins from epoxy resins and organic monoalkylated/arylated phosphinic acids as in formula (II) which comprises reacting the polyepoxy compounds of (A) and the organic monoalkylated/arylated phosphinic acids of (B) with one another, and wherein the reaction with the phosphinic-acids as in formula (II) takes place in the presence of catalysts.
Dependencies are inferred from the claim text.