Patent · US Active

Hydroxyl functionalized polybutadiene polyurethane hotmelt prepolymer

US11060000B2 · kind B2 · utility

0Cited by

4References

20Claims

0Family size

Assignee

tesa SE · DE

Inventors

Sebastian Dietze · Hamburg, DE
Uwe Schümann · Pinneberg, DE

Key dates

Filing date	Sep 12, 2017
Grant date	Jul 13, 2021
Priority date	—
Expiry date	Mar 19, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09J2495/00
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A hydroxyl-functionalized polybutadiene polyurethane hotmelt prepolymer that comprises the chemical reaction product of at least one polybutadiene diol, at least one chain extender having a hydroxyl functionality of two and a molecular weight of less than or equal to 300 g/mol and optionally at least one polybutadiene polyol that has a number-average mean functionality between greater than 2.0 and less than or equal to 3.0 with at least one aliphatic or alicyclic diisocyanate, is thermally vulcanizable, and at room temperature is sufficiently solid or high-viscosity that it can be rolled into a roll as a film applied to a carrier without flowing out or being squeezed out on the side.

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