Phillips Petroleum Company

Amoco Corporation

Other

Cleary, James W.

James W Cleary

Richard Layton

Paul D Frayer

Paul J Huspeni

Markus Matzner

Brian A Stern

Robert W Campbell

Afif M Nesheiwat

Fred T Sherk

This invention pertains to novel copolyesters consisting essentially of units (I), (II), (III), and (IV). ##STR1## and blends of these polymers and articles made from both. Units (I), (II), (III), and (IV) are present in specified proportions as defined in the 'Description of the Invention.' The instant copolyesters display orientation in the molten state, good fiber ratings and high strength; they have melting points in the range of from about 340.degree. to about 400.degree. C. and are melt-processible. Advantageously, these compositions filled with about 30 weight percent of glass fibers display heat distortion temperatures of over 240.degree. C. up to about 280.degree. C. and higher, when measured under a load of 264 psi. When blended, certain properties are improved, particularly they are easier to melt fabricate, have a decreased tendency to blister and increased strength. These polymers and blends may be used advantageously in ovenware, electronic components, electrical equipment, and other end uses requiring high temperatures.

Heat resistant polymers and blends of hydroquinone poly

This invention pertains to novel copolyesters consisting essentially of units (I), (II), (III), and (IV). ##STR1## and blends of these polymers and articles made from both. Units (I), (II), (III), and (IV) are present in specified proportions as defined in the 'Description of the Invention.' The instant copolyesters display orientation in the molten state, good fiber ratings and high strength. Advantageously, the polymers of the present invention display a significant improvement in viscosity and moldability of the neat polymer. The polymers have excellent mechanical and surface properties including blister resistance, strength, toughness, and ability to vapor phase solder, and form strong fibers while still maintaining a high heat distortion temperature. They have melting points in the range of from about 250.degree. to about 360.degree. C. and are melt-processible. Advantageously, these compositions filled with about 30 weight percent of glass fibers display heat distortion temperatures of up to 240.degree. C., when measured under a load of 264 psi. The polymers may be blended to tailor properties. These polymers and blends may be used advantageously in producing fibers and in electrical equipment, electronic components and other end uses requiring moderately high temperatures.

High strength polymers and blends of hydroquinone

High strength polymer of hydroquinone poly(iso-terephthalate) containing

A high modulus, high strength melt processable copolyester consisting essentially of recurring units (I), (II), (III) and (IV): ##STR1## wherein said copolyester has a melting point in the range of from about 340.degree. C. to 400.degree. C., a crystallization temperature of from about 300.degree. C.-340.degree. C., and a crystallization rate of at least 1,000 counts/minute.

Hydroquinone poly(iso-terephthalates) containing residues of

This invention pertains to novel copolyesters consisting essentially of units (I), (II), (III), and (V). ##STR1## and blends of these polymers and articles made from both. Units (I), (II), (III), and (IV) are present in specified proportions as defined in the 'Description of the Invention'. The instant copolyesters display orientation in the molten state, good fiber ratings and high strength; they have melting points in the range of from about 340.degree. to about 400.degree. C. and are melt-processible. Advantageously, these compositions filled with about 30 weight percent of glass fibers display heat distortion temperatures of over 240.degree. C. up to about 280.degree. C. and higher, when measured under a load of 264 psi. When blended, certain properties are improved, particularly they are easier to melt fabricate, have a decreased tendency to blister and increased strength. These polymers and blends may be used advantageously in ovenware, electronic components, electrical equipment, and other end uses requiring high temperatures.

High modulus, high strength melt-processible polyester of hydroquinone

This invention relates to the preparation of wholly aromatic polyesters from monomers having a total ash content of no more than 50 ppm and a total potassium content of no more than 20 ppm. These polyesters have good color and good thermal stability and are essentially free of char material which can lead to unacceptable molded and extruded articles.

Wholly aromatic polyesters with reduced char content

A process for the production of an arylene sulfide terpolymer is provided comprising reacting at least one alkali metal sulfide, at least one p-dihalo unsubstituted benzene, at least one polyhalo aromatic compound having more than two halogen substituents per molecule, at least one p-dihalo alkyl substituted benzene, and at least one N-alkyl lactam. Another process is provided comprising first reacting an at least one alkali metal sulfide in hydrated form or in an aqueous mixture with at least one N-alkyl lactam to form a reaction product, thereafter heating the reaction product to form a dehydrated composition, then reacting the dehydrated composition with a mixture consisting essentially of at least one p-dihalo unsubstituted benzene, at least one polyhalo aromatic compound having more than 2 halogen atoms per molecule, at least one p-dihalo alkyl subsituted benzene, and at least one member selected from the group consisting of (a) water in an amount of about 0.2 mole to about 2.5 moles per molecule of alkali metal sulfide, and (b) at least one sodium carboxylate and water, including water of hydration, in an amount of 0.0 mole to about 2.5 moles per mole of alkali metal sulfide under polymerization condiitions for a time sufficient to produce the desired terpolymer. Arylene sulfide terpolymers are provided as products of the above processes.

Arylene sulfide terpolymers and processes for making them

A process is provided for the production of aromatic sulfide/ketone polymers which comprises contacting under suitable polymerization conditions: (1) at least one dihaloaromatic ketone, (2) at least one organic amide, (3) at least one alkali metal hydrosulfide, (4) water, and (5) at least one member selected from the group consisting of (a) alkali metal carbonates and (b) mixtures of alkali metal carbonate with alkali metal hydroxide.

Production of aromatic sulfide/ketone polymers with alkali metal

Phenol is extracted with a chlorinated aromatic extractant, such as p-dichlorobenzene, from an aqueous mixture containing phenol and N-methylpyrrolidone. In an embodiment of this invention the purified N-methylpyrrolidone is recycled for use in a poly(phenylene sulfide) polymerization process.

Purification of N-methylpyrrolidone

A process for removing compounds from aprotic solvents in which aprotic solvent containing at least one acidic compound is contacted with a solid inorganic compound chosen from alkaline earth carbonates, alkaline earth hydroxides, alkaline earth oxides, and alumina in which the contact of the solvent with a solid inorganic compound is by the process of fluidized bed contact, stirred slurry contact or trickle bed contact. Contaminated NMP from poly(phenylene sulfide) production is substantially freed of acidic contaminants by a series of fractionations with a treatment of the kettle liquid of at least one fractionation by the method described above and/or a treatment of the overhead of the last fractionation in series by the method described above.

N-Methyl pyrrolidone-2 purification

Poly(arylene sulfide) compositions and process comprising producing poly(arylene sulfide) in the presence of a thermoplastic elastomeric hydrogenated conjugated diene/monovinyl arene block copolymer present in an amount sufficient to improve the physical properties of the composition.

Polymer compositions and process

Water or acidified water can be used to extract N-methylpyrrolidone from a mixture containing phenol and N-methylpyrrolidone. In one embodiment of this invention water or acidified water can be used to extract N-methylpyrrolidone from the kettle bottoms of the N-methylpyrrolidone recovery column of a poly(phenylene sulfide) polymerization process.

Extraction of N-methylpyrrolidone-2

Arylene sulfide polymers such as polyphenylene sulfide containing ash-forming impurities or materials verified by contacting an aqueous mixture of such polymer with molecular oxygen and a finite, but small, effective amount of a mineral acid under conditions sufficient to reduce the ash-forming impurities and concurrently at least partially cure the polymer.

Polymer treatment

A copolyester having good impact strength is prepared utilizing terephthalic acid or the lower alkyl esters thereof and a mixture of 1,4-butanediol and 1,4-cyclohexanedimethanol as the sole monomers.

Growing community of inventors

Bartlesville, OK, United States of America

James W Cleary