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Class Information
Number: 521/138
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 two or more solid polymers or from at least one solid polymer and at least one polymer-forming system > At least one polymer is derived from a polycarboxylic acid or derivative and a polyol or wherein the polymer-forming system containing the same type of reactants
Description: Subject matter wherein at least one of the polymers is the reaction product of a polycarboxylic acid or derivative and a polyol.










Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
4613628 Resin composition for closed-cell foam and cured resin foam prepared by using said resin composition Sep. 23, 1986
4613627 Process for the manufacture of shaped fibrous products and the resultant product Sep. 23, 1986
4608398 Foamable thermosetting compositions and methods of coating therewith Aug. 26, 1986
4600727 Composition and method for making foamed polyester resin Jul. 15, 1986
4598106 Pressure-resistant buoyancy material Jul. 1, 1986
4595623 Fiber-reinforced syntactic foam composites and method of forming same Jun. 17, 1986
4588754 Low modulus structural foam May. 13, 1986
4588753 Plastics cellular material May. 13, 1986
4588752 Foaming and vulcanizing of elastomeric polymers May. 13, 1986
4587272 Foamable polycarbonate compositions, articles and methods May. 6, 1986
4581383 Lightly crosslinked linear olefinic polymer foam blends and process for making Apr. 8, 1986
4578231 Process for the production of polyolefin foams Mar. 25, 1986
4560706 Method of producing polyester foams using borohydride dispersions Dec. 24, 1985
4554293 Lightly crosslinked linear olefinic polymer foam blends and process for making Nov. 19, 1985
4550124 Blowing agents and their use in preparations of polyester foams Oct. 29, 1985
4544677 Foamable polycarbonate compositions, articles and methods Oct. 1, 1985
4539337 Backing material Sep. 3, 1985
4525297 Electro-conductive thermoplastic resin foam and preparation process thereof Jun. 25, 1985
4525487 Method for making polyester resin foam by spraying Jun. 25, 1985
4522954 Method for producing a low density foamed polyester resin Jun. 11, 1985
4515908 Liquid foams of reinforced unsaturated polyester resins and process for making the same May. 7, 1985
4514523 Method of producing polyester foams using borohydride dispersions Apr. 30, 1985
4507406 Blowing agents and their use in preparations of polyester foams Mar. 26, 1985
4489174 Vesiculated beads Dec. 18, 1984
4483945 Process of preparing vesiculated polyester granules Nov. 20, 1984
4482649 Plastics cellular material and method of making Nov. 13, 1984
4466933 Heat-resistant foamed plastic materials Aug. 21, 1984
4465792 Process for producing flexible polyester foam Aug. 14, 1984
4462947 Heat-resistant foamed polyesters Jul. 31, 1984
4461849 Vesiculated beads Jul. 24, 1984
4461848 Production of vesiculated polymer beads Jul. 24, 1984
4460714 Unsaturated polyester resin foams using inorganic iron salts Jul. 17, 1984
4454256 Dielectrically heatable polyolefin foams Jun. 12, 1984
4444832 Process for obtaining reinforced cellular materials based on unsaturated polyester resins Apr. 24, 1984
4440876 Liquid foams of reinforced unsaturated polyester resins and process for making the same Apr. 3, 1984
4435525 Reaction of carbonylhydrazines and organic peroxides to foam unsaturated polyester resins Mar. 6, 1984
4433068 Process for producing bonded macroballoon structures and resulting product Feb. 21, 1984
4431752 Unsaturated polyester foams Feb. 14, 1984
4419459 Process of producing transparent foamed plastics materials Dec. 6, 1983
4419462 Foamed thermoplastic resin comprising poly (p-methylenebenzoate) Dec. 6, 1983
4406846 Foamed thermoplastic resin comprising poly(p-methylenebenzoate) Sep. 27, 1983
4401771 Method for preparing polyester foam using cobalt/potassium promotors Aug. 30, 1983
4399237 Vesiculated polymer granules containing TiO.sub.2 Aug. 16, 1983
4397965 Expandable and curable polyester resin composition and method for making same Aug. 9, 1983
4394461 Azocarboxylate blowing agent Jul. 19, 1983
4393148 Reaction of t-alkylhydrazinium salts and ogranic peroxides to foam unsaturated polyester resins Jul. 12, 1983
4376833 Composition for producing self-supporting stiff expanded materials Mar. 15, 1983
4370425 Process for obtaining permanently self-extinguishing cellular materials which have a low density and high mechanical characteristics Jan. 25, 1983
4353999 Process for the production of alkali metal silicate-organic plastics Oct. 12, 1982
4351911 Foamable polyester composition Sep. 28, 1982

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