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Class Information
Number: 521/161
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 > N=c=x reactant contains a heterocyclic ring
Description: Subject matter wherein the -N=C=X reactant contains a heterocyclic ring.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8465669 Monolith separation medium for chromatography and process for producing the same Jun. 18, 2013
8198342 Aluminum chelate latent curing agent and production method thereof Jun. 12, 2012
7745659 Process for the production of liquid, storage-stable organic isocyanates with a low colour index having carbodiimide- and/or uretone imine groups Jun. 29, 2010
6846849 Saccharide-based resin for the preparation of foam Jan. 25, 2005
6822042 Saccharide-based resin for the preparation of composite products Nov. 23, 2004
6245825 Polyurethane foams Jun. 12, 2001
6242555 Light-stable elastomeric polyurethane mouldings and process for the production thereof Jun. 5, 2001
6201035 Use of low unsaturated polyether polyols in high resilience slabstock foam applications Mar. 13, 2001
6201034 Biodegradable polymers, the production thereof and the use thereof for producing biodegradable moldings Mar. 13, 2001
6031010 Polyurethane foam composition having improved flex fatigue Feb. 29, 2000
5614566 Method for the preparation of rigid foams having urethane and/or isocyanurate groups and being extensively open celled Mar. 25, 1997
5484818 Organic aerogels Jan. 16, 1996
5436277 Polyisocyanate compositions for the preparation of flexible polyurethane foams Jul. 25, 1995
5356946 Process for preparing reaction injection moldings Oct. 18, 1994
5356945 Reactive polyurethanes Oct. 18, 1994
5342881 Process for the standardization and stabilization of organic polyisocyanates and the stable products of this process Aug. 30, 1994
5288768 Urea-modified isocyanurates Feb. 22, 1994
5286759 Foaming system for rigid urethane and isocyanurate foams Feb. 15, 1994
5216035 Water-blown polyurethane integral skin foam Jun. 1, 1993
5202358 Process for the preparation of liquid storable organic isocyanates containing carbodiimide and/or uretone imine groups and their use for the preparation of polyurethane plastics Apr. 13, 1993
5169878 Composition and method of preparation of viscosity-stabilized polyisocyanates comprising triazine groups Dec. 8, 1992
5124370 Polyisocyanate mixtures containing isocyanurate groups, a process for their production and their use for the production of polyurethane foams Jun. 23, 1992
5102918 Process for producing modified organic polyisocyanate Apr. 7, 1992
5093384 Heat insulator made of shape memory polymer foam Mar. 3, 1992
5093383 Polyurethane/urea foams from isocyanate prepolymers and isocyanate reactive imino/enamino functional reactants Mar. 3, 1992
5071887 Polyurethane elastomer Dec. 10, 1991
5047439 Expandable powder coating composition, method of coating a substrate with heat-insulating foam and composite material obtained thereby Sep. 10, 1991
4987213 Polyurethane and process for preparing same Jan. 22, 1991
4937012 Low temperature stable polymethylene polyphenylene polyisocyanates Jun. 26, 1990
4906674 Polysocyanate compositions Mar. 6, 1990
4786655 Process for the preparation of polyurethanes containing uretdione rings formed in the presence of a bismuth salt of an organic carboxylic acid Nov. 22, 1988
4757095 Utilization of lactones and lactams in the preparation of polyurethane-polyurea products Jul. 12, 1988
4722946 Energy-attenuating polyurethanes Feb. 2, 1988
4719247 Deformable polyurethane having improved cure time Jan. 12, 1988
4707502 Process for the production of urethane-modified polyisocyanate preparations, the polyisocyanate preparations obtainable by this process and their use in the production of plastics based on Nov. 17, 1987
4642320 Reaction injection molded polyureas employing high molecular weight amine-terminated polyethers Feb. 10, 1987
4616043 Aliphatic polyurethane sprayable coating compositions and method of preparation Oct. 7, 1986
4581432 Heat-curable compositions which are storage-stable at room temperature and are based on compounds having reactive hydrogen atoms and polyisocyanates Apr. 8, 1986
4576747 Isocyanato-azetidinediones Mar. 18, 1986
4546120 Urethane forming compositions based on fatty polyols Oct. 8, 1985
4530941 Reaction injection molded polyurethanes employing high molecular weight polyols Jul. 23, 1985
4495309 Reaction injection molded polyurethanes, polyureas and polyurea-urethanes employing thiapolycyclic polyisocyanates Jan. 22, 1985
4478960 Diphenylmethane diisocyanate-based liquid polyisocyanate mixtures containing urethane groups, process for their preparation and their use for the preparation of flexible polyurethane foams Oct. 23, 1984
4442280 Heterogeneous systems of polyol/diphenyl methane uret dione diisocyanates and a process for their production Apr. 10, 1984
4386167 Polyisocyanurate polymer containing pendant urea groups, polyol dispersions and polyurethane compositions prepared therefrom May. 31, 1983
4382125 Isocyanurate-modified polymethylene polyphenylene polyisocyanate compositions May. 3, 1983
4360603 Process for the preparation of compounds containing s-triazine units and isocyanate groups or isocyanate-reactive groups and the production of polyurethanes containing these fillers Nov. 23, 1982
4359550 Polyisocyanurate polymers, dispersions, and cellular and non-cellular polyurethane products prepared therefrom Nov. 16, 1982
4359541 Process for the preparation of polyisocyanurate dispersions and compositions prepared therefrom Nov. 16, 1982
4330636 Carbamylbiuret-modified polyisocyanates May. 18, 1982

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