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Class Information
Number: 521/132
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 formation prior to or during solid polymer formation in the presence of a stated ingredient other than water > Ingredient contains only carbon and hydrogen atoms, only c and halogen atoms, or only c, h, and halogen atoms > Said ingredient is substantially nonvolatile material, e.g., hydrocarbon waxes, greases, etc.
Description: Subject matter wherein the stated ingredient which contains (1) only carbon and halogen atoms, or (2) only carbon, hydrogen, and halogen atoms, or (3) only carbon and halogen atoms, is a solid or liquid and has slight or no tendency to pass into a gaseous state under the contemplated conditions of the process.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
7897652 Polyurethane composition useful as shock absorbers and a method for their preparation Mar. 1, 2011
7238730 Viscoelastic polyurethane foam Jul. 3, 2007
6750265 Prepolymer compostion for insulating foams Jun. 15, 2004
6730713 Creation of epoxy-based foam-in-place material using encapsulated metal carbonate May. 4, 2004
6552097 Prepolymer compositions for insulating foams Apr. 22, 2003
6498198 Fill for pillows and cushions Dec. 24, 2002
6495611 Polyisocyanate polyaddition products Dec. 17, 2002
6465534 Elastic sponge Oct. 15, 2002
6265456 Hydrosilation in high boiling natural oils Jul. 24, 2001
6080800 Aqueous wax dispersions as cell openers in making polyurethane flexible foams Jun. 27, 2000
6071977 Hydrosilation in high boiling natural vegetable oils Jun. 6, 2000
6054499 Prepolymer composition for insulating foams Apr. 25, 2000
6048909 Foams having increased heat distortion temperature made from blends of alkenyl aromatic polymers and alpha-olefin/vinyl or vinylidene aromatic and/or sterically hindered aliphatic or cycloalip Apr. 11, 2000
5973016 Resilient polyurethane foams of polydiene diols and oil Oct. 26, 1999
5962542 Process for producing hydrocarbon-blown hard polyurethane foams Oct. 5, 1999
5910515 Polyurethane foam Jun. 8, 1999
5900320 Foamed plastic and method of manufacturing the same May. 4, 1999
5895791 Method and system for obtaining near-surface characteristics of materials using ultrasonic Rayleigh waves Apr. 20, 1999
5856678 Open-celled rigid polyurethane foam Jan. 5, 1999
5849806 Resilient polyurethane foams of polydiene diols and tackifying resin Dec. 15, 1998
5814675 Process for the preparation of polyurethane microspheres Sep. 29, 1998
5786398 Manufacture of insulating foams containing film forming additives Jul. 28, 1998
5730896 Polymeric foams Mar. 24, 1998
5721284 Open-celled rigid polyurethane foam Feb. 24, 1998
5703136 Polymeric foams Dec. 30, 1997
5698606 Process for rigid polyurethane foams Dec. 16, 1997
5690855 Polyol blend, cellular polyurethane foam product made therefrom, and halogenated hydrocarbon-free process therefor Nov. 25, 1997
5679718 Microcellular foams containing an infrared attenuating agent and a method of using Oct. 21, 1997
5674919 Biaxially oriented film of high molecular weight polyethylene, process for preparing the same, surface-modified biaxially oriented film of high molecular weight polyethylene and process for pr Oct. 7, 1997
5614566 Method for the preparation of rigid foams having urethane and/or isocyanurate groups and being extensively open celled Mar. 25, 1997
5604265 Process for rigid polyurethane foams Feb. 18, 1997
5565497 Dispersant for filled, rigid cellular polymers Oct. 15, 1996
5510054 Polyurethane elastomer and foam exhibiting improved abrasion resistance Apr. 23, 1996
5484818 Organic aerogels Jan. 16, 1996
5451615 Process for preparing polyurethane foam in the presence of a hydrocarbon blowing agent Sep. 19, 1995
5405885 Rigid polyurethane/polyisocyanate foams containing paraffinic based oils Apr. 11, 1995
5395860 Flexible polyurethane foams using chlorinated alkanes Mar. 7, 1995
5391584 Manufacture of rigid foams and compositions therefor Feb. 21, 1995
5389692 Structural strength coating and material Feb. 14, 1995
5376208 Water-permeable and fire-resistant product and a preparing method thereof Dec. 27, 1994
5368769 Manufacture of cellular polymers and compositions therefor Nov. 29, 1994
5356556 Manufacture of rigid foams and compositions therefor Oct. 18, 1994
5346928 Rigid polyurethane foams Sep. 13, 1994
5310766 Foam stabilizing additive and polyurethane foam prepared in the presence thereof May. 10, 1994
5281632 Cellular polymer containing perforated cell windows and a process for the preparation thereof Jan. 25, 1994
5250579 Cellular polymer containing perforated cell windows and a process for the preparation thereof Oct. 5, 1993
5240965 Manufacture of cellular polymers and compositions therefor Aug. 31, 1993
5238970 Manufacture of rigid foams and compositions therefor Aug. 24, 1993
5198473 Polyurethane foams of increased flame retardancy Mar. 30, 1993
5137929 Additives which stabilize hydrohalocarbon blowing agent in polyurethane and polyisocyanurate foam formulations during polymerization Aug. 11, 1992

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