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Class Information
Number: 521/49.5
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Synthetic resins (class 520, subclass 1) > Process of treating scrap or waste product containing solid organic polymer to recover a solid polymer therefrom > Treating polyurethane, polyurea (excluding urea-formaldehyde polymers), polyisocyanurate or polycarbodiimide > Treating with alcohol or amine
Description: Subject matter wherein said polymeric scrap or waste product is treated with an alcohol or amine.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8609740 Closed-loop recycled polyurethane foam, methods of manufacture and products therefrom Dec. 17, 2013
8580124 Switchable hydrophilicity solvents and methods of use thereof Nov. 12, 2013
8183337 Method of purifying ethylene vinyl alcohol copolymers for use with implantable medical devices May. 22, 2012
8153699 Self-priming surfacing composition for finished surfaces Apr. 10, 2012
8071656 Nylon extraction from commingled materials Dec. 6, 2011
8030364 Polyols and polyurethanes, polyurethaneforms using the same Oct. 4, 2011
7947750 Method for removing color from polymeric material May. 24, 2011
7943676 Method of recycling waste plastic foam materials May. 17, 2011
7910688 Recycling superabsorbent polymer fines Mar. 22, 2011
7893120 Method for reclaiming pulverized synthetic resin product Feb. 22, 2011
7547734 Method for producing recycled resin, and resin material containing recycled resin produced by that method Jun. 16, 2009
7538143 Method for the treatment of waste containing polyamide with the reprocessing of the depolymerisation residue May. 26, 2009
7511081 Recycled method for a wasted polymer which is mixed polyester polyamide and reclaimed materials thereof Mar. 31, 2009
7138435 Method of decomposing thermosetting resin, apparatus and heat control program Nov. 21, 2006
7056956 Method for recycling a plastic material Jun. 6, 2006
7053130 Method to accelerate biodegradation of aliphatic-aromatic co-polyesters by enzymatic treatment May. 30, 2006
6919383 CO2-assisted deploymerization, purification and recycling of step-growth polymers Jul. 19, 2005
6837950 Separation of floor covering components for recycling Jan. 4, 2005
6802997 Method of manufacturing rigid polyurethane foam material, method of manufacturing refrigerator, and refrigerator Oct. 12, 2004
6750260 Process for chemical recycling of polyurethane-containing scrap Jun. 15, 2004
6689821 Chemical method of removing paint film on plastic resin using isopropyl alcohol Feb. 10, 2004
6660779 Method of manufacturing rigid polyurethane foam material, method of manufacturing refrigerator, and refrigerator Dec. 9, 2003
6515036 Method of decomposing a polyurethane Feb. 4, 2003
6489373 Method for decomposition and recovery of polyurethane resin Dec. 3, 2002
6172126 Cosolvent-free, aqueous, anionic polyurethane dispersions and their use as peelable coatings Jan. 9, 2001
6156811 Molded polyurethane articles prepared from recycled polyols and processes for their production and use Dec. 5, 2000
6110580 Recycling trim components for vehicles Aug. 29, 2000
6083283 Method for removing color from ionically dyeable polymeric materials Jul. 4, 2000
6069182 Recycling of plastic waste containing a mixture of polyurethanes with other plastics May. 30, 2000
6031064 Condensation products based on triazines and formaldehyde Feb. 29, 2000
6020386 Process for the production of hydroxyfunctional compounds from (polyurethane) polyurea waste Feb. 1, 2000
6013685 Process for recycling packings Jan. 11, 2000
5968992 Reduction of the amine content of recycled polyols Oct. 19, 1999
5958988 Cross-linked polyurethane resin powder and process for producing the same Sep. 28, 1999
5908894 Thermoplastic polyurethanes and their preparation Jun. 1, 1999
5906998 Method for decomposing polymer containing urethane linkage and/or urealinkage May. 25, 1999
5891926 Devulcanization of cured rubber Apr. 6, 1999
5891927 Recycling of microcellular polyurethanes Apr. 6, 1999
5849804 Recovery of polyamides from composite articles Dec. 15, 1998
5840773 Process for recovering and recycling polyamide from carpet waste Nov. 24, 1998
5814674 Method for processing residue-containing packages Sep. 29, 1998
5756636 Isocyanate prepolymers produced from toluene diisocyanate residue dissolved in toluene diisocyanate May. 26, 1998
5753750 Toluene diisocyanate residue-based compositions as fillers for polyisocyanates May. 19, 1998
5753749 Dicyclohexylmethane diisocyanate residue-based compositions and the use of such compositions as fillers May. 19, 1998
5739207 Hexamethylene diisocyanate residue-based compositions as fillers for polyisocyanates Apr. 14, 1998
5721280 Method for depolymerizing polyimides and recovering reagents therefrom Feb. 24, 1998
5716996 Method for the recovery of secondary polyols from paint sludges Feb. 10, 1998
5714523 Process for hydrolysing polyurethane degradation products Feb. 3, 1998
5691389 Recycling of flexible foam Nov. 25, 1997
5691388 Method of decomposing polycyanurate-containing materials Nov. 25, 1997

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