General Electric Company

Timothy J Ullman

Ronald J Gambale

John Bennie Yates, Iii

Kathryn Lynn Longley

Susan J Hathaway

John B Yates

Blocked amine terminated polycarbonate is provided which can be used to form anhydride terminated polycarbonates, or copolymers with various functionalized organic polymers. A blocked amino phenol, such as N-t-butoxycarbonyl tyramine can be used as a chain stopper under interfacial conditions to chain stop polycarbonate. The t-butoxycarbonyl can be removed by melt processing the polycarbonate to yield an amine end group which can be reacted with other polymers or with an organic dianhydride to form anhydride terminated polycarbonate. The anhydride terminated polycarbonates can be used to form copolymers with amine terminated polyamides.

Blocked amine terminated polycarbonates and products obtained therefrom

Branched polycarbonates are prepared by the reaction of at least one polyepoxy compound, preferably triglycidyl isocyanurate, with at least one carboxylic acid-terminated polycarbonate, preferably of the type prepared by employing t-butyl p-hydroxybenzoate as a chainstopper in an interfacial polycarbonate formation reaction followed by thermal elimination of isobutene. The branched polycarbonates have high melt viscosities and high complex viscosity ratios, and are particularly useful in such operations as blow molding.

Poly epoxy branched polycarbonate and method for preparation

Carboxy-functionalized polycarbonates are prepared by incorporating a carboxylic acid-substituted phenol, preferably t-butyl p-hydroxybenzoate, as a chainstopper in a polycarbonate-forming reaction. The products are capable of forming copolymers with other polymers such as polyamides and functionalized olefin polymers, by generation of a carboxy group which reacts therewith.

Preparation of copolymer from carboxy-functionalized polycarbonate and

Carboxy-functionalized polycarbonate from carboxyphenol

Resinous compositions having excellent impact resistance are obtained by initially blending at least one polyphenylene ether or a blend thereof with at least one polystyrene, a functionalizing compound such as maleic anhydride or fumaric acid and an unfunctionalized elastomeric olefin copolymer such as an EPDM, and subsequently blending the resulting product with at least one polyamide.

Impact modification of polyphenylene ether-polyamide compositions

Resinous compositions comprising blends of linear polyesters such as poly(butylene terephthalate) with nitrile rubbers have very high impact strengths. The blends may also contain other polymers such as elastomers free from nitrile structural units, addition polymers of olefins or chlorinated olefins, or polylactones; such other polymers frequently improve properties such as gloss and low temperature impact strength.

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Voorheesville, NY, United States of America

Timothy J Ullman