Invention Grant
US4020050A Method of preparing polymer from dianhydride and hydrazine or dihydrazide
失效
从二酐和肼或二酰肼制备聚合物的方法
- Patent Title: Method of preparing polymer from dianhydride and hydrazine or dihydrazide
- Patent Title (中): 从二酐和肼或二酰肼制备聚合物的方法
-
Application No.: US511322Application Date: 1974-10-02
-
Publication No.: US4020050APublication Date: 1977-04-26
- Inventor: Karl F. Schimmel , Marco Wismer
- Applicant: Karl F. Schimmel , Marco Wismer
- Applicant Address: PA Pittsburgh
- Assignee: PPG Industries, Inc.
- Current Assignee: PPG Industries, Inc.
- Current Assignee Address: PA Pittsburgh
- Main IPC: C08G73/02
- IPC: C08G73/02 ; C08G73/08 ; C08G73/10
Abstract:
Novel polymers formed from the reaction of tetracarboxylic dianhydrides and hydrazines or hydrazides which may be cross-linkable by further reaction with a hydrazine or a hydrazide are disclosed.
Public/Granted literature
- US5622316A Self-adjusting jet breaker for impact sprinklers Public/Granted day:1997-04-22
Information query
