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Class Information
Number: 521/131
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
Description: Subject matter wherein the stated ingredient contains (1) only carbon and hydrogen atoms, or (2) only carbon, hydrogen, and halogen atoms, or (3) only carbon and halogen atoms.










Sub-classes under this class:

Class Number Class Name Patents
521/132 Said ingredient is substantially nonvolatile material, e.g., hydrocarbon waxes, greases, etc. 110


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Patent Number Title Of Patent Date Issued
4547529 Storage stable, foamable two-part polyorganosiloxane compositions Oct. 15, 1985
4546122 Flexible polyurethane foams Oct. 8, 1985
4546119 Closed cell phenolic foam Oct. 8, 1985
4544678 Filled or extended polyurethane foam containing polyethylene glycol softening agent Oct. 1, 1985
4542165 Polyurethane based on epoxy-containing polymer polyol and process for making the same Sep. 17, 1985
4539338 Phenol formaldehyde resoles for making phenolic foam Sep. 3, 1985
4535096 Polyester polyurethane foam based medical support pad Aug. 13, 1985
4532263 Expansible polymer molding process and the resultant product Jul. 30, 1985
4532094 Thermoplastic foam molding Jul. 30, 1985
4530777 Polyurethane foams and processes for preparation Jul. 23, 1985
4529744 Compatibilized aromatic polyester polyols Jul. 16, 1985
4525490 High tear strength flexible urethane foam composition and method of preparation Jun. 25, 1985
4522954 Method for producing a low density foamed polyester resin Jun. 11, 1985
4521544 Polyurethane foam from cellulosic products Jun. 4, 1985
4514524 Intumescent flexible polyurethane foam Apr. 30, 1985
4511678 Resilient foam based on a melamine-formaldehyde condensate Apr. 16, 1985
4506090 Aromatic polyols made from polyethylene terephthalate scrap, glycols and aromatic carbonyl-containing compounds Mar. 19, 1985
4489176 Polyurethane compositions useful as adhesives for insulation materials and/or facings Dec. 18, 1984
4478958 Method for preparing phenolic foams using anhydrous aryl sulfonic acid catalysts Oct. 23, 1984
4476159 High temperature adhesive silicone foam composition, foam generating system and method of generating foam Oct. 9, 1984
4473668 Method for determining the optimum component ratios in a polyurethane foam process Sep. 25, 1984
4469821 Low smoke, halohydrocarbon-compatible urethane-isocyanurate foam compositions Sep. 4, 1984
4467051 Method of producing a cellular resin suitable for use as an insulating material Aug. 21, 1984
4458036 Flexible polyurethane foams containing glycoluril reaction products for a flame and ember drip retardance Jul. 3, 1984
4454251 Polyurea foams prepared from isocyanate, water, and a lower-alkanol Jun. 12, 1984
4452924 Flexible polyurethane foams having improved load bearing characteristics Jun. 5, 1984
4452920 Flexible polyurethane foams having junction modifying particulate additives Jun. 5, 1984
4451638 Process for the production of alkali metal polyester silicate resinous products May. 29, 1984
4451587 Polyurethane foam and its production May. 29, 1984
4444918 Aromatic polyols made from waste streams from the manufacture of terephthalic acids, alkylene glycols and dibasic acids Apr. 24, 1984
4444917 Polyisocyanurate foam Apr. 24, 1984
4444915 Rigid polyisocyanurate foam Apr. 24, 1984
4444916 Polyisocyanurate foam and reaction mixture for making same Apr. 24, 1984
4444913 Modified polyisocyanurate foam and method of preparation Apr. 24, 1984
4442238 Aromatic amide polyols for rigid polyurethane foams Apr. 10, 1984
4442237 Novel aromatic amide polyols from the reaction of phthalic acid residues, alkylene glycols and amino alcohols Apr. 10, 1984
4439549 Novel aromatic polyester polyol mixtures made from polyethylene terephthalate residues and alkylene oxides Mar. 27, 1984
4439551 Packaging foam polyurethane composition employing novel polyol blend Mar. 27, 1984
4439550 Aromatic polyols made from recycled polyethylene terephthalate waste streams, alkylene glycol and dibasic acid waste streams Mar. 27, 1984
4430454 Polymeric foam derived from polymaleic anhydride and its preparation Feb. 7, 1984
4430446 Plastics foam production Feb. 7, 1984
4429069 Flame retardant polyurethane composition Jan. 31, 1984
4426461 Modified polyisocyanurate foam and method of preparation Jan. 17, 1984
4426460 Polyurethanes or isocyanurates from alkoxylated hydroxymethylfuran Jan. 17, 1984
4425447 Flame retardant polymer composition Jan. 10, 1984
4425446 Urea-modified isocyanurate foam, composition and method Jan. 10, 1984
4422877 Synthetic polymer-propellant compositions forming cold foamed structures having a temperature at least 30.degree. C. below ambient temperature and containing open and/or closed cells Dec. 27, 1983
4419457 Production of polyurethane foams Dec. 6, 1983
4419460 Phenolic foams Dec. 6, 1983
4411949 Polymeric foams from transesterified by-product derived from manufacture of dimethyl terephthalate and laminates therefrom Oct. 25, 1983

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