CHU K.; GRIFFITHS J., J. CHEM. SOC. PERKIN TRANS., PART 1, 1978, NO 5, 406-408
作者:CHU K.、 GRIFFITHS J.
DOI:——
日期:——
OLIGOMERES DE CHELATES DE GADOLINIUM LEUR, APPLICATION COMME PRODUITS DE CONTRASTE EN IMAGERIE PAR RESONANCE MAGENTIQUE ET LEURS INTERMEDIAIRES DE SYNTHESE
申请人:GUERBET
公开号:EP1480979A2
公开(公告)日:2004-12-01
Polyamide, Film, and Image Display Device
申请人:Sakurai Seiya
公开号:US20080124534A1
公开(公告)日:2008-05-29
A polyamide having from 25 to 90 mol % of a repeating unit of the following formula (1) and having from 10 to 75 mol % of a repeating unit of the following formula (2): formula (1) formula (2) wherein the ring and the ring are a monocyclic or polycyclic ring; R
1
and R
2
each are H or a substituent; R
3
and R
4
each are a substituent; p and q each are from 0 to 4; and L is 2,6-naphthylene, 3,3′-biphenylene or paraphenylene. The polyamide has good heat resistance and excellent optical and mechanical properties.
ULTRA HIGH TEMPERATURE PACKER BY HIGH-TEMPERATURE ELASTOMERIC POLYMERS
申请人:Chen Kuo-Chiang
公开号:US20110139466A1
公开(公告)日:2011-06-16
A high temperature downhole packer including a tubular member, an annular and longitudinally movable ring, and a packer. The tubular member has a stop located on an outer diameter thereof. The annular and longitudinally movable ring is disposed around the outer diameter of the tubular member. The packer element is disposed between the stop and the ring. The packer element includes a high temperature elastomeric polymer having a first storage modulus from about 1,000 MPa to about 10,000 MPa at a first temperature between about −100° C. and about 175° C., and a second storage modulus from about 1 MPa to about 1000 MPa at a second temperature ranging from about 175° C. to about 475° C.