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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:
| 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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