Aromatic ploycarbodiimine and sheet using it
AssigneeNitto Denko Corporation
InventorsMichie Sakamoto, Amane Mochizuki, Mashiro Yoshioka
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Abstract
An aromatic polycarbodiimide containing a siloxane bond in the polymer main chain thereof. The polycarbodiimide can adhere at a low temperature in a short time and has a high heat resistance. The polycarbodiimide has a good adhesive property to an adherend such as semiconductor elements, has a low hygroscopic property and is excellent in the storage stability. Therefore, the polycarbodiimide can be stored for a long period of time at normal temperature.
Claims11
An aromatic polycarbodiimide containing a siloxane bond in a repeating structural unit of the polymer main chain.
A copolymerized polycarbodiimide containing a structural unit represented by the following formula (IIa) and a structural unit represented by the following formula (IIb);
- ##STR12## wherein R represents single bond or an alkylene group having from 1 to 4 carbon atoms;
- x represents an integer of from 1 to 20;
- y represents a positive integer;
- R' represents a divalent organic group;
- and m represents a positive integer.
Dependencies are inferred from the claim text.