The B. F. Goodrich Company

Central Sprinkler Company

Lubrizol Advanced Materials, Inc.

Noveon, Inc.

Noveon IP Holdings Corp.

Pmd Holdings Corp.

Girish T Dalal

Theodore Joseph Schmitz

Arthur L Backman

Andrew L Auvil

Thomas L Evans

Stephen J Meyer

George G Meyer

Carmine L Schiavone

Fred Brannan

Andrew M Olah

Carl M Mahabir

Joseph J Vontorcik, Jr

David L Milenius

Mark D Julius

A Donald Meltzer

Ann Giovannitti-Jensen

Robert S Newby

John C Bushi

David A Wendell

Stefanie Hahnen-Schroeder

Anthony Kordecki

Michael D Vaughn

David C Buy

James J Dedrick

Thomas Henry Forsyth

A CPVC composition having good impact and heat stability includes a siloxane-acrylic copolymer impact modifier and an aluminosilicate zeolite, and a reduced amount of a liquid stabilizer such as a tin compound. Such compositions can be formed into piping for indoor and outdoor water systems including hot water.

CPVC compositions having good impact strength and heat stability, and smooth surfaces

Pipe or tubing of crosslinked polyethylene ('PEX') containing less than 2% by wt. carbon black provides improved resistance to oxidizing agents such as chlorine and hypochlorous acid in water. The pipe may be further protected with a thin tubular core (inner layer) of high density polyethylene or chlorinated polyethylene. The pipe may optionally have an oxygen barrier layer, such as poly(ethylene-co-vinyl alcohol) ('EVOH'), contiguously disposed radially outward from the carbon-containing PEX layer. The pipe is suitable for potable water applications and for hot water radiant heating systems.

Carbon black-containing crosslinked polyethylene pipe having resistance to chlorine and hypochlorous acid

A multi-layered pipe of arbitrary length and cross-section is produced by co-extrusion of a segmented thermoplastic copolyester elastomer (COPE) outer body over the exterior surface of an annular tubular core of CPVC/PVC having a wall thickness, measured in the radial direction, in the range from about 0.95 mm (38 mils) to about 1.375 mm (55 mils). The COPE is cohesively bonded to the annular core coextensively with essentially the entire length of the pipe. Though the COPE is easily degraded in contact with water, and CPVC and blends of CPVC with less than 25% by weight of PVC are typically rigid when extruded as pipe, a laminated pipe of COPE and CPVC/PVC with the specified wall thickness and overall dimensions which in the laminated pipe satisfy an applicable plumbing code (SDR-11 in the U.S.) has essentially the same performance characteristics as commercially available CPVC pipe which is a monolayer and not a laminate.

Flexible laminated plastic pipe having a chlorinated poly(vinyl chloride) hollow core

A multi-layered pipe of arbitrary length and cross-section is produced by co-extrusion of a lower polyolefin (C&#x2013;C) outer body over the exterior surface of a tubular core of randomly, partially randomly, or blocky chlorinated lower polyolefin, the core having a wall thickness, measured in the radial direction, in the range from about 0.025 mm to 5 mm. The tubular core is coextensive with essentially the entire length of the pipe. The tubular core comprises a major proportion by weight of the randomly chlorinated polyolefin (r-CPO), or, partially randomly chlorinated polyolefin (pr-CPO), or, a blocky chlorinated polyolefin (b-CPO), any of which may be blended with a minor proportion by weight of a blending ingredient. The r-CPO, pr-CPO or b-CPO, or a blend thereof, each has an extrusion temperature in the same range as that for the corresponding non-halogenated polyolefin, namely in the range from about 150&#xb0; C. to 250&#xb0; C.

Polyefinic pipe having a chlorinated polyolefinic hollow core

A multilayer PEX pipe having improved resistance to oxidizing agents in water. The pipe has a thin tubular core (inner layer) of high density polyethylene and an outer layer of crosslinked polyethylene. The pipe may optionally have an oxygen barrier layer, such as poly(ethylene-co-vinyl alcohol) ('EVOH'), contiguously disposed radially outward from the PEX layer. The pipe is suitable for potable water applications and for hot water radiant heating systems.

Crosslinked polyethylene pipe having a high density polyethylene liner

A multilayer composite pipe structure is described. The multilayer composite pipe comprises a hollow inner conduit, a first layer of adhesive, a metallic intermediate layer, a second layer of adhesive, as well as, the outer thermoplastic layer, respectively. The hollow inner conduit is made from any rigid thermoplastic material. The outer thermoplastic layer is made from a rigid, amorphous thermoplastic polymer. This multilayer composite pipe is pressure bearing. In one embodiment, the multilayer composite pipe is solvent cementable; whereas in another embodiment, the multilayer composite pipe is heat fusible. In still yet another embodiment of the invention, the multilayer composite pipe is bendable. Furthermore, the multilayer composite pipe can be used in a fluid conduit system with fittings with an optional insert.

Multilayer composite pipe fluid conduit system using multilayer composite pipe and method of making the composite

Multilayer fluid conduits are formed by adhering to a tubular outer surface of a metal pipe, a thermoplastic outer layer. The outer layer permits ends of the multilayer conduit to be joined together in leak-proof fluid conduit systems simply by adhering the conduit ends with compatible thermoplastic fittings. For fire protection systems, the preferred metal is steel, the preferred thermoplastic is CPVC and the preferred adhesive is heat activated. The adhesive coated metal pipe is preheated and the CPVC is extruded onto the outer surface of the heated metal pipe. Through the use of fire resistive CPVC, the multilayer conduit systems of the present invention can be installed in more severe fire threat areas than can existing, all plastic piping, including all CPVC piping systems. The conduit is assembled into systems on site simply by cutting and direct bonding with ordinary, all plastic fittings using appropriate bonding agents such as solvent based adhesives. CPVC fittings are preferred for fire protection systems.

Fluid conduit systems and methods for making

The present invention relates to thermoplastic polymer compounds comprising a blend of a chlorinated polyvinyl chloride and an impact modifier containing a polyorganosiloxane and polyalkyl(meth)acrylate. The novel thermoplastic compound has improved stability and toughness and exhibits a low rate of heat release.

Chlorinated polyvinyl chloride compounds having improved stability,

Multilayer fluid conduits

The present invention relates to a method of forming a sharp small radius bend in a rigid thermoplastic pipe having a close fitting metal sleeve without kinking or cracking in the thermoplastic at the bend. Furthermore, the invention comprises a rigid thermoplastic pipe having a metal sleeve with a bend formed in the area of the sleeve.

Method of bending a rigid thermoplastic pipe

Growing community of inventors

Avon Lake, OH, United States of America

Girish T Dalal