Patent · US Active

Reducing polymerization-induced shrinkage stress by reversible addition-fragmentation chain transfer

US9758597B2 · kind B2 · utility

3Cited by

31References

32Claims

0Family size

Assignee

The Regents of the University of Colorado, a Body Corporate · US

Inventors

Christopher N. Bowman · Boulder, US
Diana Leung · Westminster, US

Key dates

Filing date	Aug 6, 2012
Grant date	Sep 12, 2017
Priority date	—
Expiry date	Sep 20, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2438/03
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention provides methods of reducing shrinkage stress in cross-linked polymerized materials by combining an addition-fragmentation chain transfer additive with a resin system prior to polymerization. The methods of the invention can improve the performance of conventional resin systems by reducing the shrinkage stress without significantly degrading the mechanical properties of the polymerized material. The shrinkage stress in the crosslinked polymeric materials produced by the methods of the invention may be from 25% to 75% of that of a control material produced by polymerization of the resin system alone to the same conversion.

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