Patent · US Active

Low temperature segmented copolymer compositions and methods

US9388272B2 · kind B2 · utility

0Cited by

2References

20Claims

0Family size

Assignee

The Boeing Company · US

Inventors

Andrew P. Nowak · Los Angeles, US
Chaoyin Zhou · Chino, US
Richard E. Sharp · Weldon Spring, US

Key dates

Filing date	Jan 22, 2015
Grant date	Jul 12, 2016
Priority date	—
Expiry date	Jan 22, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G77/16
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

There is provided a method of synthesizing a segmented copolymer that includes mixing one or more α,ω (alpha, omega) amine or α,ω (alpha, omega) hydroxyl terminated polysiloxane first soft segments having an average molecular weight of between about 2500 grams per mole to about 10,000 grams per mole, and one or more diisocyanate species, together to form a first reaction product; mixing the first reaction product and one or more low molecular weight diol or diamine chain extenders each having an average molecular weight of less than 400 grams per mole, together in a solvent to form a segmented copolymer; and, removing the solvent.

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