The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 12, 1983
Filed:
Mar. 02, 1981
Russell A Gaudiana, Merrimack, NH (US);
Palaiyur S Kalyanaraman, Chalfont, PA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
A class of polyamides comprising recurring units having substituted-quaterphenylene radicals is disclosed. The polymers comprise recurring units of the formula ##STR1## wherein each of A and B is a divalent radical, except that B can represent a single bond; R and R.sup.1 are each hydrogen, alkyl, aryl, alkaryl or aralkyl; and c is zero or one; and wherein, when c is one, at least one of A and B is a substituted-quaterphenylene radical having the formula ##STR2## where each U is a substituent other than hydrogen, each W is hydrogen or a substituent other than hydrogen, each p is an integer from 1 to 3, each X is hydrogen or a substituent other than hydrogen and each r is an integer from 1 to 4, the U, W.sub.p and X.sub.r substitution being sufficient to provide the radical with a non-coplanar molecular configuration; and wherein, when c is zero, A is a substituted-quaterphenylene radical as aforedescribed. The polyamide materials exhibit solubility in select solvents including those of the non-amide type and are characterized by high electron density substantially cylindrically distributed about the long axis thereof. The molecularly oriented polymers are optically uniaxial and are suited to application in optical filter and other devices where a highly refractive and birefringent polymeric material is desired.