Method of bonding films with a polyurethane adhesive.

摘要

A composition for polyurethane adhesives comprising (1) a triisocyanate of the formula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="25" wi="56" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein
<Chemistry id="chema02" num="0002"><Image id="ia02" he="11" wi="9" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>is
<Chemistry id="chema03" num="0003"><Image id="ia03" he="12" wi="11" file="IMGA0003.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>or
<Chemistry id="chema04" num="0004"><Image id="ia04" he="12" wi="17" file="IMGA0004.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>a modified product of said triisocyanate or an adduct of said triisocyanate having terminal isocyanate groups and (2) an active hydrogen compound exhibits excellent adhesion, especially between polyethylene terephthalates, polyolefins and metals, heat resistance and weatherability, and has low toxicity and can be solventless or light solid.