Patent · US Active

Halogen-free flameproof epoxy resin formulations

US7951878B2 · kind B2 · utility

0Cited by

7References

22Claims

0Family size

Assignee

SCHILL + SEILACHER STRUKTOL GMBH · DE

Inventors

Berthold Just · Hamburg, DE
Holger Keller · Sinsheim, DE
Manfred Doering
Uwe Storzer · Tübingen, DE
Sebastian Seibold · Menden, DE

Key dates

Filing date	Dec 12, 2006
Grant date	May 31, 2011
Priority date	—
Expiry date	Sep 3, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH05K2201/012
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a method for preparing halogen-free flameproof epoxy resins, in which a halogen-free epoxy resin is reacted with a polyfunctional aldehyde or ketone and a phosphinic acid derivative, wherein the phosphinic acid derivative contains at least one P—H-active structural unit of the formula ═PH(O) and is used in an amount equivalent to the polyfunctionality of the aldehyde or ketone, to a halogen-free flameproof epoxy resin obtainable by this method, to the use of the epoxy resin as a base material for the manufacture of printed circuit boards and printed circuits and to intermediates used to prepare the epoxy resins.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.