Patent · US Active

Halogen-free flame retardants

US8470916B2 · kind B2 · utility

4Cited by

11References

21Claims

0Family size

Assignee

SCHILL + SEILACHER GMBH · DE

Inventors

Udo Glauner · Sindelfingen, DE
Uwe Storzer · Tübingen, DE
Holger Keller · Sinsheim, DE
Horst Rieckert · Calw, DE

Key dates

Filing date	Mar 2, 2009
Grant date	Jun 25, 2013
Priority date	—
Expiry date	Dec 1, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L67/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A halogen-free flame retardant obtainable by polycondensation of phosphoric monomers with esterifying monomers is provided. The phosphoric monomer is an adduct of 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide (DOPO) and ring substituted DOPO derivatives to unsaturated carboxylic acids. Monovalent and polyvalent alcohols are used as esterifying monomers. The flame retardant has an average molecular weight of more than 20,000 and an average degree of polymerization Pn of at least 55, and is preferably used for the production of polyamide fibers and polyester fibers by melt spinning.

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