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Class Information
Number: 521/73
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. > Process of preparing a cellular product of a plastisol of a solid polymer derived solely from ethylenically unsaturated monomers; forming a plastisol of a solid polymer derived solely from an ethylenically unsaturated monomer which is designed to be formed into a cellular product, or composition thereof
Description: Subject matter wherein a cellular product is produced from a nongelled plastisol containing a solid polymer derived solely from ethylenically unsaturated monomers.

Sub-classes under this class:

Class Number Class Name Patents
521/74 By incorporation of material in gaseous state 39
521/75 System contains two or more solid polymers or contains at least one solid polymer and at least one polymer-forming system 53

Patents under this class:
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Patent Number Title Of Patent Date Issued
8569062 Cryogels of PVA-boronic acid containing co-polymers for cell culture Oct. 29, 2013
8436105 Vulcanizable composition having acoustic attenuating properties May. 7, 2013
8277719 Process for the preparation of auxetic foams Oct. 2, 2012
8168293 Formulations for cellular, foamed-polymer products based on polyvinyl chloride, improved cellular, foamed-polymer products based on polyvinyl chloride and a process for producing said improved May. 1, 2012
7919541 Method of manufacturing flame-retardant polymer foam comprising a phosphorous flame retardant and flame-retardant foam produced thereby Apr. 5, 2011
7812080 Low-color foam compositions Oct. 12, 2010
7354970 Polyvinyl chloride copolymer paste resin, composition thereof, and method for making the resin Apr. 8, 2008
7160929 Nanocomposite and molecular-composite polymer foams and method for their production Jan. 9, 2007
6949588 Perforated foams Sep. 27, 2005
6861476 Mixtures of thermoplastic elastomers and polar polymers Mar. 1, 2005
6803417 Polyolefin powder, processes for making and using slush molded articles made from the same Oct. 12, 2004
6716914 Compatible linear and branched ethylenic polymers and foams therefrom Apr. 6, 2004
6608115 Polyvinyl chloride resins and method of preparation and use in the production of whitened polyvinyl chloride foam Aug. 19, 2003
6605649 Method of production of whitened polyvinyl chloride foam Aug. 12, 2003
6500873 Polyvinyl chloride resins and method of preparation and use in the production of whitened polyvinyl chloride foam Dec. 31, 2002
6465535 Grip material Oct. 15, 2002
6107356 High suction polymeric foam materials Aug. 22, 2000
5872155 Latex based on vinyl chloride copolymers with a specific structure, process for the manufacture thereof and applications thereof Feb. 16, 1999
5861442 Acrylonitrile polymer compositions and articles and methods for their preparation Jan. 19, 1999
5855287 Synthetic closure for removable insertion into a wine bottle Jan. 5, 1999
5756555 Acoustically active plastisols May. 26, 1998
5741824 Acoustically active plastisols Apr. 21, 1998
5692629 Molded closure for a liquid container having printing thereon Dec. 2, 1997
5677356 Expandable poly (vinyl chloride) resin composition for use in power molding, process for producing the same, and expansion-molded articles using the same Oct. 14, 1997
5589520 Acrylonitrile polymer composition and articles and methods for their preparation Dec. 31, 1996
5552448 Plastic foam material composed of thermoplastic resin and silane-modified thermoplastic resin and method for making same Sep. 3, 1996
5434205 Acrylonitrile polymer compositions and articles and methods for their preparation Jul. 18, 1995
5334622 Mechanically frothed plastisols Aug. 2, 1994
5328937 Foam based cork substitute Jul. 12, 1994
5304590 Acrylonitrile polymer compositions and articles and methods for their preparation Apr. 19, 1994
5300533 Method for production of crosslinked plastic foam Apr. 5, 1994
5262444 Porous plastic film product, useful as a breathable wall covering or filters Nov. 16, 1993
5252623 Expandable vinyl chloride resin composition Oct. 12, 1993
5229428 Closure assembly and method of making same using epoxidized natural oil in a low fusing, curable plastisol Jul. 20, 1993
5162380 Method of preparation of foamed articles of polyvinyl chloride resins Nov. 10, 1992
5140053 Foamable polymer composition and foamed article Aug. 18, 1992
5137926 High-surface-area compositions Aug. 11, 1992
5107068 Polyurethane resin and utilization thereof Apr. 21, 1992
5049590 Poly (vinyl chloride) insulation fittings Sep. 17, 1991
5037857 High-surface-area fiber Aug. 6, 1991
4956222 Formable vinyl chloride resin composition for powder molding and method for producing same Sep. 11, 1990
4931478 Process for the preparation of an expandable vinyl plastisol Jun. 5, 1990
4485192 Plastisol sealing gaskets puffed with hollow discrete spheres Nov. 27, 1984
4477599 Method of preparing a low density, nonflammable polyvinyl foam composition Oct. 16, 1984
4454250 Low density cellular polyvinyl chloride Jun. 12, 1984
4434251 Cross-linked polyvinyl chloride resin foam and method of manufacturing the same Feb. 28, 1984
4430136 Process for preparing open-cell structure of vinyl chloride resin Feb. 7, 1984
4425449 Decorative syntactic foam products Jan. 10, 1984
4425442 Process for producing open cell foam and foamable compound Jan. 10, 1984
4423161 Apparatus and method for dispensing foamable compositions Dec. 27, 1983

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