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Class Information
Number: 521/177
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Synthetic resins (class 520, subclass 1) > Cellular products or processes of preparing a cellular product, e.g., foams, pores, channels, etc. > Cellular product derived from a -n=c=x containing reactant wherein x is a chalcogen atom > With -xh reactant wherein x is a chalcogen atom > -xh reactant contains a c-x-c group > C-x-c reactant contains a carbocyclic ring, e.g., aromatic, etc.
Description: Subject matter wherein the -XH containing -C-X-C- reactant contains a carbocyclic ring.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8258196 Method for producing rigid polyurethane foam, and rigid polyurethane foam Sep. 4, 2012
8158692 Polyurethane foam for steering wheel having improved water resistance Apr. 17, 2012
6861453 Process for producing a urethane-modified polyisocyanurate foam Mar. 1, 2005
6569352 Phthalic anhydride based polyester-ether polyols and urethane prepolymers produced therefrom May. 27, 2003
6211259 Low volatile reinforcing system Apr. 3, 2001
6077927 Process for coloring polymer resins and products thereof Jun. 20, 2000
6001890 Open celled cellular polyurethane products Dec. 14, 1999
5874021 Method for producing low-fuming rigid polyurethane foam Feb. 23, 1999
5872156 Method for producing low-fuming rigid polyurethane foam Feb. 16, 1999
5864002 Process for coloring polymer resins and products thereof Jan. 26, 1999
5824714 Polyether polyol for preparing rigid polyurethane foams Oct. 20, 1998
5741847 Polymer polyols containing halogenated aromatic monomers and polyurethane foam made therefrom Apr. 21, 1998
5731398 Black colorant composition exhibiting low flairing Mar. 24, 1998
5645928 Heat insulation panels manufactured from modified polyisocyanurate foams Jul. 8, 1997
5627220 Process of the preparation of modified polyisocyanurate foams for heat insulation materials May. 6, 1997
5369138 Preparation of flexible, molded, cold-cure polyurethane foams Nov. 29, 1994
5225101 Polyol compositions for producing rigid polyurethane foams Jul. 6, 1993
5216040 Rigid polyurethane foam and process for producing the same Jun. 1, 1993
5173517 Rigid polyurethane foam and heat insulator obtained therefrom Dec. 22, 1992
5169875 Urethane composition Dec. 8, 1992
5107068 Polyurethane resin and utilization thereof Apr. 21, 1992
5077321 Process for the preparation of polyurethane substances using specific stabilizer systems Dec. 31, 1991
5026739 Methods of producing rigid polyurethane foams for interior or exterior use for automobiles Jun. 25, 1991
4990545 Articles with polyurethane resin having memory shape characteristics and method of utilizing same Feb. 5, 1991
4943597 Polyether polyol formulations for hard CFC replacement by water blowing in rigid polyurethane foams Jul. 24, 1990
4931486 Poly(alkylene carbonate) polyols as antistatic additives for polyurethanes Jun. 5, 1990
4888365 Isocyanate terminated quasi-prepolymers useful for preparing polyurethane/polyisocyanurate foams having low thermal conductivity Dec. 19, 1989
4742089 Rigid polyurethane foam and process for producing the same May. 3, 1988
4699932 Halogenated-hydrocarbon blown, open-cell, polyurethane foam and a composition and method for the fabrication thereof Oct. 13, 1987
4596836 Stabilizing urethanes with antioxidants Jun. 24, 1986
4543369 Alkoxylated polyester polyols and polyurethanes made therefrom Sep. 24, 1985
4542163 Method for the manufacture of polyisocyanurate foams Sep. 17, 1985
4539378 Vinyl polymer polyols made using epoxy resin-modified polyols Sep. 3, 1985
4539339 Polyurethane foams made from vinyl polymer polyols Sep. 3, 1985
4518720 Flexible polyurethane foams made from polyether polyols modified with epoxy resin-diamine adducts May. 21, 1985
4490490 High load bearing flexible polyurethane foams Dec. 25, 1984
4487853 Low ethylene oxide/high primary hydroxyl content polyether-ester polyols and polyurethane foams based thereon Dec. 11, 1984
4473669 Phenolic polyols and rigid cellular compositions derived therefrom Sep. 25, 1984
4461852 Phenolic resin foam and process for producing the same Jul. 24, 1984
4440664 Process for the dispersion of chain extender in polyol Apr. 3, 1984
4430247 Process for preparing an oxyalkylated product Feb. 7, 1984
4390641 Flame-retardant benzylic-ether phenolic modified foam and method of preparing same Jun. 28, 1983
4374970 Sulfur-modified copolyether glycols, a method for preparing them, and polyurethanes prepared therefrom Feb. 22, 1983
4373084 Sulfur-modified polypropylene ether glycols, a method for preparing them, and polyurethanes prepared therefrom Feb. 8, 1983
4373034 Modification of polyols with epoxy resins for use in flexible polyurethane foams Feb. 8, 1983
4371687 Sulfur-modified polytetramethylene ether glycols, a method for preparing them, and polyurethanes prepared therefrom Feb. 1, 1983
4323658 Polyisocyanurates from diols modified with epoxy resins Apr. 6, 1982
4302551 Process for the preparation of cellular polymers having urethane groups, isocyanurate groups, or both Nov. 24, 1981
4288562 Initiators for isocyanate reactions Sep. 8, 1981
4260514 Urethane foam compositions Apr. 7, 1981

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