Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From aldehyde or derivative thereof as reactant
Patent
1989-05-10
1991-10-08
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From aldehyde or derivative thereof as reactant
528230, 528232, 528233, 528235, 528236, 528241, 528408, 528409, 528412, 528417, C08G 5900, C08G 6500, C08G 1226, C08G 6502
Patent
active
050555472
ABSTRACT:
The present invention relates to copolyethers comprising copolymers of 7,oxa-bicyclo(2,2,1)heptane, and its alkyl-derivatives, with one or more single-ring or condensed-rings cycloaliphatic ethers, comprising the characteristic group; ##STR1## wherein R' is hydrogen and R" is H, a halogen, or an alkyl radical containing a small number of carbon atoms, and which may also be halogen-substituted.
If the ether contains one ring only, it contains from 5 to 12 atoms in the ring, and if it contains a condensed-ring system, it contains a total number of from 10 to 18 atoms in the rings.
Those copolyethers show a anisotropic behaviour in the molten state, and therefore have liquid-crystal properties.
REFERENCES:
patent: 2856370 (1958-10-01), Muetterties
patent: 3372146 (1968-03-01), Sidi
patent: 3390129 (1968-07-01), Furukawa et al.
patent: 3393157 (1968-07-01), Janssen et al.
patent: 3417033 (1968-12-01), Weissermel et al.
Fiore Leonardo
Maritano Mauro
Motroni Giuseppe
Kight III John
Krass Frederick
Montedison S.p.A.
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