Patent · US Active

Multi-segment expandable polymer compositions which expand in a controllable direction

US8133420B2 · kind B2 · utility

1Cited by

12References

28Claims

0Family size

Assignee

DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

Frank Billotto · Rochester, US
Mark P. Allen · Washington Township, US
Frank Flavin · Midland, US

Key dates

Filing date	Aug 9, 2007
Grant date	Mar 13, 2012
Priority date	—
Expiry date	Dec 1, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S264/13
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Expandable polymer compositions are used to reinforce or provide various types of insulation to cavities in structural elements. The polymer compositions include at least two different segments, which may or may not be joined. At least one of the segments will expand before another segment when heated. The first-to-expand segment forms a physical barrier to the expansion of later-expanding segments, thereby restricting the expansion of the later-expanding segment in at least one direction. In this manner, the location of the expanded polymer within the cavity can be easily and inexpensively controlled.

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