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Class Information
Number: 521/901
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Cellular polymer containing a carbodiimide structure
Description: Subject matter involving cellular products containing the carbodiimide structure, i.e., -N-C=N-.










Patents under this class:
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Patent Number Title Of Patent Date Issued
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
5550168 Process for producing modified polyisocyanurate foams Aug. 27, 1996
5491174 Process for preparation of polyurethanes utilizing novel catalysts Feb. 13, 1996
5470889 Catalyst for polyisocyanurate foams made with alternative blowing agents Nov. 28, 1995
5321050 Method for producing modified polyisocyanurate foams Jun. 14, 1994
5321101 Thermosetting resin and a method for producing it Jun. 14, 1994
5308883 Catalyst for polyisocyanurate foams made with alternative blowing agents May. 3, 1994
5284880 Water-blown polyurethane integral skin foam Feb. 8, 1994
5254597 Production of chlorofluorocarbon-free, urethane-containing moldings having a cellular core and a compacted peripheral zone Oct. 19, 1993
5236960 Water-blown polyurethane integral skin foam Aug. 17, 1993
RE34296 Process for the preparation of hydrophilic membranes and such membranes Jun. 29, 1993
5216035 Water-blown polyurethane integral skin foam Jun. 1, 1993
5214076 Carbodiimide-isocyanurate all water blown open celled foam May. 25, 1993
5079326 Thermosetting resin and a method for producing it Jan. 7, 1992
4886836 Activated medium with low non-specific protein adsorption Dec. 12, 1989
4882362 Foamed microbeads and a process for their preparation Nov. 21, 1989
4804687 Foamed microbeads and a process for their preparation Feb. 14, 1989
4798847 Process for the preparation of hydrophilic membranes and such membranes Jan. 17, 1989
4703100 Process for the production of polyisocyanates containing urea and/or biuret groups, preparations obtainable thereby and their use Oct. 27, 1987
4611013 Catalysts for the preparation of carbodiimide foams and elastomers Sep. 9, 1986
4424288 Carbodiimide-modified polymethylene polyphenylene polyisocyanates for use in the preparation of polyisocyanurate-polyurethane foams Jan. 3, 1984
4421868 Polyester-melamine thermosetting foam and method of preparation Dec. 20, 1983
4409341 Composition for fire retardant urethane foam Oct. 11, 1983
4384051 Flexible polyurethane foam based on MDI May. 17, 1983
4384050 Flexible polyurethane foam based on MDI May. 17, 1983
4377645 Dimensionally-stable polyurethane sponge and sponge-forming prepolymer Mar. 22, 1983
4344855 Process for the production of polyisocyanates which contain carbodiimide groups and which are stable in storage Aug. 17, 1982
4299883 Method of making a sound-absorbent material, and material so made Nov. 10, 1981
4284730 Liquid carbodiimide- and uretonimine-isocyanurate-containing polyisocyanate compositions and microcellular foams made therefrom Aug. 18, 1981
4266038 Rubber-modified fire-retardant imide copolymers May. 5, 1981
4266040 Polyazlactone-electron deficient ethylenically unsaturated resinous compositions and method for foaming same May. 5, 1981
4228095 Process for the preparation of liquid carbodiimide-modified organic polyisocyanates employing organotin catalysts Oct. 14, 1980
4221572 Abrasive material having a polycarbodiimide and polyurethane resin binder Sep. 9, 1980
4198489 Polyurethane foams prepared from highly stable liquid carbodiimide-containing 4,4'-diphenylmethane diisocyanate Apr. 15, 1980
4181770 Isocyanate-terminated branched polyethylene glycol and polyester polyurethane foams Jan. 1, 1980
4177205 Process for the preparation of highly stable liquid carbodiimide-containing polyisocyanate compositions Dec. 4, 1979
4166164 Process for the preparation of carbodiimide-isocyanurate foams Aug. 28, 1979
4151334 Process for the preparation of carbodiimide-isocyanurate foams employing quaternary boron salts as catalysts Apr. 24, 1979
4150207 Alumina trihydrate as flame retardant agent for urethane-modified carbodiimide-isocyanurate foams Apr. 17, 1979
4147710 Compounds containing phosphorous and a method for making polycarbodiimide foams with the compounds as a catalyst Apr. 3, 1979
4139686 Process for making hydrophilic elastomeric polyurethane resin wiping cloths and the resultant product Feb. 13, 1979
4129693 Urethane-modified isocyanurate foams having enhanced physical properties Dec. 12, 1978
4123599 Foams from phenolic resins and isocyanates, and process for the manufacture thereof Oct. 31, 1978
4088665 Process for the partial carbodiimidization of organic isocyanates May. 9, 1978
4067820 High molecular weight, insoluble carbodiimidization catalysts Jan. 10, 1978
4066629 Process for preparing carbodiimides utilizing a phosphonium salt catalyst Jan. 3, 1978
4054546 Triazine compositions and their use as catalysts Oct. 18, 1977
4051082 Carbodiimide-isocyanurate foams modified with ethoxylated polyols Sep. 27, 1977
4029611 Carbodiimide-isocyanurate foams modified with polyfurfuryl alcohol polymers Jun. 14, 1977

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