Abstract: Compositions and methods for a melt processable semicrystalline poly(aryl ether ketone) incorporating phthalazinone and 4,4?-biphenol as comonomer units are described herein. The polymers are resistant to and insoluble in common organic solvents and liquids as well as in aggressive organic solvents such as chloroform and chlorinated liquids. The polymers are melt processable via techniques such as extrusion, injection molding, and compression molding. The semicrystalline poly(aryl ether ketone) containing phthalazinone comonomer units have properties which make them suitable for manufacturing high temperature resistant molded systems and other articles.

Abstract: Substrate protective structures, including high performance polymers and polymer coatings from 1 to over 2500 mils thick, are disclosed. The structures protect metal and other surfaces with heat resistant, abrasion resistant, and chemical inert polymers. The structures are applied to the substrate in a manner that provides easy processing of curved and bent surfaces, increased adhesion of metal to polymer, greater resistance to mechanical and thermal stresses that cause cracking and de-lamination, and increased environmental resistance.

Abstract: A process for producing a solution blend of a polybenzimidazole (PBI) and a polyetherketoneketone (PEKK). The PBI is mixed with sulfuric acid at a temperature between 40° C. and 80° C. for 30 minutes to 2 hours to produce a PBI solution then cooled to room temperature to form a cooled PBI solution. Then PEKK is added to the cooled PBI solution to form a mixture and that mixture is stirred from 30 minutes to 2 hours at room temperature to form a stirred mixture. The stirred mixture is poured into an excess of water being stirred swiftly to form an aqueous mixture. The aqueous mixture is filtered to produce a blend. The blend is washed with water and dried. The resulting blend can yield a blend in all proportion from 1/99 PBI/PEKK to 99/1 PBI/PEKK.

Abstract: The present invention is directed to an extrudable resin composition and a method of extruding the extrudable resin composition, comprising a high temperature engineering thermoplastic, one or more reinforcement components, an enhancing filler component, a polymeric lubricant, and an external lubricant, wherein the extrudable resin composition is capable of withstanding temperatures up to about 427° C. The invention is further directed to the use of the extruded pipes and/or lined pipes, produced according to the present method, in downhole tubular applications in oil and gas production; in line pipe, flow line, and transportation line applications in oil and gas production and supply operations; or in most any application where corrosive protection is required to transmit or store corrosive fluids, particularly at high temperatures.

Abstract: A watertight coupler, of which the watertight structure is firm and reliable to make the coupler able to fast and conveniently connect two mutually opposite water pipes.