General Electric Company

Sabic Innovative Plastics IP B.v.

Sabic Global Technologies B.v.

Subash Scindia

Radhakrishna Arakali Srinivasarao

Patrick Joseph McCloskey

Jan-Pleun Lens

Jan Pleun Lens

Gautam Chatterjee

William David Richards

Warren William Reilly

Umesh Krishna Hasyagar

Yatin Tayalia

Tilak Thulasi Raj

Binod Behari Sahoo

Radhakrishna Srinivasarao Arakali

T Tilak Raj

Nagarajan Arumugam

Gokul Srinivasan

Subarna Shyamroy

Subrahmanya Bhat K

AS Radhakrishna

K Subrahmanya Bhat

An aromatic polycarbonate having a high refractive index and good processing and mechanical properties is provided. The aromatic polycarbonate comprises a thiodiphenol monomer and a biphenyl monomer. The refractive index of the polycarbonate may be greater than 1.670.

Polycarbonate with high refractive index

A method for producing a transparent article comprises the steps of melt transesterifying a monomer mixture in the presence of a transesterification catalyst to produce a hydroquinone polycarbonate copolymer product comprising greater than 45 mole percent of structural units derived from the hydroquinone. The monomer mixture comprises a hydroquinone, at least one aromatic dihydroxy compound other than the hydroquinone, and a carbonic acid diester. The hydroquinone polycarbonate copolymer product is then heated to a highest processing temperature of 5&#xb0; C. to 20&#xb0; C. above a maximum melting melt temperature for the hydroquinone copolymer product for a sufficient period of time to render the hydroquinone polycarbonate copolymer product transparent upon cooling to ambient temperature; and cooling the hydroquinone polycarbonate copolymer product to produce the transparent article. The method can also be used for producing transparent hydroquinone polycarbonate copolymers, which can be used for producing the transparent articles.

Methods for preparing transparent articles from hydroquinone polycarbonate copolymers

A polymer comprising structural units derived from a polycyclic dihydroxy compound of Formula (I) wherein R, Rand Rare independently at each occurrence selected from the group consisting of a cyano functionality, a halogen, an aliphatic functionality having 1 to 10 carbons, a cycloaliphatic functionality having 3 to 10 carbons, and an aromatic functionality having 6 to 10 carbons; wherein each occurrence of 'n', 'm', and &#x201c;p&#x201d; independently has a value of 0, 1, 2, 3, or 4; and wherein the polymer is substantially linear.

Polymers, polymer compositions, and method of preparation

A polymer comprising at least one structural unit derived from a dihydroxy compound of Formula (I) wherein Ris an aromatic divalent functionality having 6 to 60 carbons, Rcan be the same or different at each occurrence and is independently at each occurrence selected from the group consisting of a cyano functionality, a nitro functionality, a halogen, an aliphatic functionality having 1 to 10 carbons, a cycloaliphatic functionality having 3 to 10 carbons and an aromatic functionality having 6 to 10 carbons and 'n' is an integer having a value 0 to 3.

Polymers, polymer compositions and method of preparation

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Subash Scindia