Patent · US Active

Thermally expandable preparations

US9790341B2 · kind B2 · utility

2Cited by

0References

13Claims

0Family size

Assignee

Henkel AG & Co. KGaA · DE

Inventors

Emilie Barriau · Laguna Niguel, US
Martin Renkel · Goldkronach, DE
Rainer Schoenfeld · Goldkronach, DE
Sven Wucherpfennig · Dormagen, DE
Tim Welters · Hilden, DE

Key dates

Filing date	Sep 19, 2014
Grant date	Oct 17, 2017
Priority date	—
Expiry date	Mar 16, 2036

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/1376
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The subject matter of the present application is a thermally expandable preparation that can be pumped at application temperatures below 70° C., containing (a) at least one first epoxy resin E1 that has an epoxy equivalent weight of at most 280 g/eq and a viscosity of at most 1250 Pa*s at 25° C., (b) at least one second epoxy resin E2 that has an epoxy equivalent weight of at least 300 g/eq and a viscosity of at most 250 Pa*s at 25° C., (c) at least one hardener that can be thermally activated, (d) at least one propellant that can be thermally activated, and (e) at least 1 wt. % of organic fibres having a fibre length of 0.2 mm to 10 mm.

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