Patent · US Expired

Polymers containing bioactive glass with antimicrobial effect

US7241459B2 · kind B2 · utility

15Cited by

5References

9Claims

0Family size

Assignee

Schott AG · DE

Inventors

Joerg Fechner · Mainz, DE
Jose Zimmer · Ingelheim am Rhein, DE
Roland Schnabel · Hofheim, DE
Rupert Schnell · Worms, DE

Key dates

Filing date	May 7, 2002
Grant date	Jul 10, 2007
Priority date	—
Expiry date	Jan 19, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C2204/02
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The method of protecting a polymeric plastic from attack by bacteria and fungi includes providing bioactive glass particles having a mean particles size preferably less than 2 μm as an additive incorporated into the polymeric plastic. The bioactive glass particles contain 40 to 60% by weight of SiO2, 10 to 30% by weight of CaO, 10 to 35% by weight of Na2O, 2 to 8 % by weight of P2O5, 0 to 25% by weight of CaF2, 0 to 10% by weight of B2O3, 0 to 8% by weight of K2O and/or 0 to 5% by weight of MgO. The additive is included in amounts of up to 25% by weight in the polymeric plastic.

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