Polyimides and process for preparing polyimides having improved thermal-oxidative stability
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08G-043/10
C08G-069/26
출원번호
US-0535663
(2000-03-23)
발명자
/ 주소
Meador Mary Ann B.
Frimer Aryeh A.,ILX
출원인 / 주소
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
대리인 / 주소
Stone
인용정보
피인용 횟수 :
8인용 특허 :
12
초록▼
radical where R is either hydrogen or an alkyl radical of 1 to 4 carbons, R.sup.2 is either OH, NH.sub.2, F, or Cl radical, R.sup.3 is either H, OH, NH.sub.2, F, Cl or an alkylene radical, R.sup.4 is either an alkyl, aryl, alkoxy, aryloxy, nitro, F, or Cl radical, and R.sup.5 is either H, alkyl, ary
radical where R is either hydrogen or an alkyl radical of 1 to 4 carbons, R.sup.2 is either OH, NH.sub.2, F, or Cl radical, R.sup.3 is either H, OH, NH.sub.2, F, Cl or an alkylene radical, R.sup.4 is either an alkyl, aryl, alkoxy, aryloxy, nitro, F, or Cl radical, and R.sup.5 is either H, alkyl, aryl, alkoxy, aryloxy, nitro, F, or Cl radical. The polyimides are useful particularly in the preparation of prepregs and PMR composites.
대표청구항▼
[ The invention claimed:] [1.]1. Polyimides having improved thermal-oxidative stability derived from the polymerization of effective amounts of at least one polyamine, at lease one tetracarboxylic dianhydride and a dicarboxylic endcap having a formula selected from the group consisting of:R.sup.1 is
[ The invention claimed:] [1.]1. Polyimides having improved thermal-oxidative stability derived from the polymerization of effective amounts of at least one polyamine, at lease one tetracarboxylic dianhydride and a dicarboxylic endcap having a formula selected from the group consisting of:R.sup.1 is selected from the group consisting of re R is either hydrogen or an alkyl radical of 1 to 4 carbons,R.sup.2 is selected from the group consisting of --OH, NH.sub.2, F and Cl radicals, andR.sup.3 is selected from the group consisting of H, OH, NH.sub.2, F, Cl and lower alkylene radicals.
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이 특허에 인용된 특허 (12)
Lauver Richard W. (Rocky River OH), Chemical approach for controlling nadimide cure temperature and rate with maleimide.
Lubowtiz Hyman R. (Rolling Hills Estates CA) Sheppard Clyde H. (Post Falls ID), Heterocycle or heterocycle sulfone oligomers with multiple chemically functional end caps.
Serafini Tito T. (Redlands CA) Cheng Paul G. (Rancho Palos Verdes CA) Ueda Kenneth K. (Lomita CA) Wright Ward F. (Redondo Beach CA), Polyimide resins useful at high temperatures.
Moriyama, Hideki; Uhara, Kenji; Dunbar, Meredith L.; Edman, James R., Laminate type materials for flexible circuits or similar-type assemblies and methods relating thereto.
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