| 摘要 |
<p>Disclosed is a substantially fully imidized diglyme-insoluble, N-methylpyrrolidone-soluble polyimidesiloxane which is the reaction product of a dianhydride, about 1 to about 5% by weight of a mono-anhydride, and a mixture of about 20 to about 50% by weight siloxane diamine and about 50 to about 70% by weight non-siloxane diamine. The non-siloxane diamine is a mixture of about 33 to about 50 mole percent of a first diamine having the general formula <CHEM> and about 50 to about 67 mole percent of a second diamine having the general formula <CHEM> where each "X" is independently selected from hydrogen and halogen and each "Y" is independently selected from -CH2-, <CHEM> The polyimidesiloxanes are very useful in coating wire, cable, and circuit boards.</p> |
