Class 521/49.8 - Treating polycarbonamide

Subclass of Class 521 - Synthetic resins or natural rubbers -- part of the class 520 series
Definition: Subject matter wherein the scrap or waste product contains
No. of patents: 36
Last issue date: 12/06/2011

Number	Title	Issue Date
8071656	Nylon extraction from commingled materials The present invention provides energetically and economically efficient methods for separating polyamide polymer(s) from commingled materials. The methods generally involve precipitating a polyamide polymer dissolved in a solvent (e.g., formic acid) using dimethyl e...	12/06/2011
8017662	Method of separation and cleaning of post consumer carpet face yarn from carpet backing and yarn product produced therefrom A process for producing a synthetic fiber composition with reclaimed post consumer carpet yarn, wherein face yarn is shaved from post consumer carpet using a shaving device to provide shaved face yarn, the shaved face yarn is reduced in size, contaminants are remove...	09/13/2011
7319113	Solvent-based recovery and recycle of polyamide material A process is disclosed for recovering polyamide material from post-industrial and post-consumer products containing the polyamide material and insoluble materials. The process includes the steps of: (a) contacting the post-industrial and post-consumer products with ...	01/15/2008
7152742	Separation process for carpets Comminuted carpet pieces are fed to a first stirred tank together with an aqueous solution containing separating salt, to form a first suspension, which is fed to a first mechanical separating stage. A first high-solids phase, a second high-solids phase containing p...	12/26/2006
7115671	Process for recovering monomeric units of a nylon from whole carpet The invention relates to a process for recovering monomeric units of a nylon from carpet material. The carpet material includes fibres containing nylon bound to a backing containing one or more non-nylon components. The carpet material contains between 15 and 35 wt....	10/03/2006
7049391	Method for reducing the caprolactam content of polyamide 6, a polyamide 6 and use thereof The invention relates to a method for reducing the caprolactam content of polyamide 6 obtained especially by hydrolytic polymerization of epsilon-caprolactam. The method is characterized by the use of an additive that forms isocyanuric acid under the influence of he...	05/23/2006
7022844	Amide-based compounds, production, recovery, purification and uses thereof Methods are disclosed of producing and purifying at least one amide. In accordance with one of the methods disclosed herein, the at least one amide is produced by providing an organic liquid comprising at least one oxime, providing at least one catalyst, adding the ...	04/04/2006
6756412	Fiber-reinforced recycled thermoplastic composite and method Fiber reinforced recycled thermoplastic composites and methods for their manufacture are presented. In a preferred embodiment, the thermoplastic composite incorporates a matrix of recycled thermoplastic and a plurality of high modulus, reinforcing fibers, with the r...	06/29/2004
6627046	Separation of the products of polyamide ammonolysis The useful reaction products in an output stream from an ammonolysis reactor are separated in a manner which minimizes the time during which high boiling polyamide intermediate material(s) are in contact with the amine-functional monomer product(s) or wit...	09/30/2003
6420440	Method for recycling alignment layer materials The present invention relates to a method for recycling an alignment layer material. The recycled alignment layer material shows the same characteristics as an original alignment layer material. The waste solution of the alignment layer material produced ...	07/16/2002
6414066	Composition containing novel modifier A composition comprising a binder and a residue wherein the residue comprises a blend of polypropylene, styrene butadiene rubber and calcium carbonate. The residue is a novel material derived as a coproduct from the medium-pressure depolymerization of nyl...	07/02/2002
6387967	Fiber-reinforced recycled thermoplastic composite and method Fiber-reinforced recycled thermoplastic composites and methods for their manufacture are presented. In a preferred embodiment, the thermoplastic composite incorporates a matrix of recycled thermoplastic and a plurality of high modulus fibers, with the rec...	05/14/2002
6384093	Method of melt processing crosslinked thermoplastic material A method of enhancing the melt-processibility of crosslinked plastic or recycling crosslinked plastic and the products formed by these methods. The melt processibility of a crosslinked thermoplastic resin may be enhanced by mixing it with a low viscosity ...	05/07/2002
6359020	Method for producing polyamides from aminonitriles Aqueous monomer and oligomer extracts obtained from polyamide production by extraction of the polymer with water are used for producing polyamides by direct reaction with aminonitriles....	03/19/2002
6271270	Fiber-reinforced recycled thermoplastic composite Fiber-reinforced recycled thermoplastic composites and methods for their manufacture are presented. In a preferred embodiment, the thermoplastic composite incorporates a matrix of recycled thermoplastic and a plurality of high modulus fibers, with the rec...	08/07/2001
6214908	Composition containing novel modifier A composition comprising a binder and a residue wherein the residue comprises a blend of polypropylene, styrene butadiene rubber and calcium carbonate. The residue is a novel material derived as a coproduct from the medium-pressure depolymerization of nyl...	04/10/2001
5994417	Process for recovering polymers from commingled materials A process for recovering polymers from commingled materials is disclosed. In general, the process includes first contacting the commingled materials with a solvent which selectively dissolves the polymer to form a solvent and polymer solution. The solvent...	11/30/1999
5977193	Reclaiming epsilon-caprolactam from nylon 6 carpet &3xb5;-Caprolactam is continuously recovered from carpet made from nylon 6 face fibers and a backing. The carpet is fed to a separator to prepare scrap containing nylon 6 and auxiliary materials. The scrap from the separator is fed to a depolymerizing rea...	11/02/1999
5973013	Polyamide/polyurethane micro-blend and process Disclosed is a process for melt blending a mixture of a thermoplastic polyamide and segmented thermoplastic copolymers of polyurethane and the product thereof. The process of the invention is useful for recycling textile goods, such as pantyhose, into a f...	10/26/1999
5902553	Method and apparatus for the production of polyamide 6 from polymide waste In a method for the depolymerization and reprocessing of material which consists of polyamide 6 waste and/or oligomer-containing polyamide 6 waste and/or oligomer-containing lactam residues and/or oligomer-containing lactam by hydrolysis in a pressure rea...	05/11/1999
5849804	Recovery of polyamides from composite articles A process for recovering polyamide from composite articles that contain polyamide involves (a) subjecting at substantially nondepolymerizing conditions the composite article to a solvent for polyamide for a time sufficient to dissolve substantially all of...	12/15/1998
5840773	Process for recovering and recycling polyamide from carpet waste The present invention relates to a process for treating polyamide-containing carpet waste by extracting the polyamide from the carpet waste with an extraction agent containing an aliphatic alcohol. The separated polyamide can then be recovered from the ex...	11/24/1998
5824745	Resin composition Post consumer recyclable plastics are combined with a ethylene-octene copolymer and a polyamide to prepare a resin composition that can be used in conventional molding processes to fabricate new and useful plastic articles of manufacture....	10/20/1998
5807932	Increasing the molecular weight of polycondensates The invention relates to a process for increasing the molecular weight of polycondensates, which comprises heating a polycondensate in the temperature range below the melting point and above the glass transition temperature in the solid phase of the polym...	09/15/1998
5717008	Composition for use in sculpturing, a sculpturing piece comprising the composition and method for obtaining the piece A composition for use in sculpturing, a sculpturing piece comprising the composition and a method for obtaining the piece, wherein the composition comprises 90 to 99% of a particulate material consisting of particles having a size from 0.05 to 2 mm, and a...	02/10/1998
5646191	Method and apparatus for the production of polyamide 6 from polyamide waste In a method for the depolymerization and reprocessing of material which consists of polyamide 6 waste and/or oligomer-containing polyamide 6 waste and/or oligomer-containing lactam residues and/or oligomer-containing lactam by hydrolysis in a pressure rea...	07/08/1997
5578648	Lamination adhesive containing thermoplastic resins and unmelted thermoplastic fibers A carpet having pile threads forming a pile layer, a support layer which consists of fiber or ribbon material of polyolefins or polyester, and a back coating, the pile threads being attached to the support layer possibly by the back coating, and of a plas...	11/26/1996
5556890	Reclaiming &3xb5;-caprolactam from carpet waste The present invention is for a method of preparing purified &3xb5;-caprolactam from carpet waste containing nylon-6. Contaminated &3xb5;-caprolactam is obtained by depolymerizing nylon-6 from carpet waste. A mixture of the contaminated &3xb5;-caprolactam ...	09/17/1996
5459168	Process for separating low molecular weight compounds from an impure thermoplastic polymer or mixture A process for treating an impure thermoplastic polymer, including raw and recycled polymers, during extrusion to separate low molecular weight compounds therefrom, including: introducing a separating agent into plasticized impure thermoplastic polymer pas...	10/17/1995
5302756	Ammonolysis of nylon Useful monomeric products are obtained in the reaction of nylon 6,6 with ammonia. Increased yield of monomer products from nylon 6,6 is obtained from ammonolysis when a mixture with nylon 6 is employed....	04/12/1994
5169870	Reclaiming &3xb5;-caprolactam from nylon 6 carpet A process for the continuous recovery of &3xb5;-caprolactam provides a carpet made from nylon 6 fibers and having a backing to a separator to prepare scrap containing nylon 6 and waste. The scrap from the separator is fed to a depolymerizing reactor where...	12/08/1992
5022985	Process for the separation and recovery of plastics Plastics are separated and recovered from mixtures containing plastics and other materials, by flotation in an aqueous dispersion, wherein the disperse phase comprises a substance such as for example calcium carbonate having an average mean particle size ...	06/11/1991
4193896	Process for modifying linear polymer resins Linear polymer resins composed of repeating hydrocarbon units linked together by ester or amide linkages are treated with a liquid or gaseous primary or secondary amine under thermal conditions which cause aminolysis of some of the linear linkages to prod...	03/18/1980
4146704	Method for manufacture of finely powdered polyamide resin A finely powdered polyamide resin is manufactured by a method which comprises dissolving a polyamide resin in a water-containing isopropyl alcohol under increased pressure at temperatures of 150° to 155° C. and subjecting the resultant solution to vigor...	03/27/1979
4070426	Acrylic modified foamed nylon product and process A method of making nylon (polycarbonamide) foam involving the use of a multi-phase carboxylic acid-containing polymer which reacts with the amine groups of the nylon to produce water which blows the foam during the process....	01/24/1978
4051212	Process for the continuous degradation of plastics The instant invention relates to a continuous process for the hydrolytic degradation of plastics wherein a hydrolyzable material is introduced with water into a screw machine, and is subjected therein to a temperature of 100 to 300° C, and a pressure of ...	09/27/1977

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Class 521/49.8 - Treating polycarbonamide