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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
6306921 Foamed beads of polyester resin Oct. 23, 2001
6300386 Expandable synthetic resin composition, synthetic resin foams, and methods for manufacturing synthetic resin foams Oct. 9, 2001
6258924 Biodegradable polymers, the preparation thereof, and the use thereof for producing biodegradable moldings Jul. 10, 2001
6214897 Compositions of polycondensed branched polyester polymers and aromatic polycarbonates, and the closed cell polymer foams made therefrom Apr. 10, 2001
6201034 Biodegradable polymers, the production thereof and the use thereof for producing biodegradable moldings Mar. 13, 2001
6187830 Process for the preparation of foamed articles Feb. 13, 2001
6184261 Water-resistant degradable foam and method of making the same Feb. 6, 2001
6172128 Nanoporous polymers crosslinked via cyclic structures Jan. 9, 2001
6156812 Nanoporous material fabricated using polymeric template strands Dec. 5, 2000
6121335 Nucleator for foaming, foamable composition, foam and production method of foam Sep. 19, 2000
6113822 Polyolefins as nucleating agent for foamed engineering polymers Sep. 5, 2000
6107357 Dielectric compositions and method for their manufacture Aug. 22, 2000
6099950 Absorbent materials having improved absorbent property and methods for making the same Aug. 8, 2000
6100307 Compositions of polycondensed branched polyester polymers and aromatic polycarbonates, and the closed cell polymer foams made therefrom Aug. 8, 2000
6054500 Flexible polyester foams Apr. 25, 2000
6051621 High temperature syndiotactic styrene polymer foam Apr. 18, 2000
6046249 Dimensional stabilizing, cell opening additives for polyurethane flexible and rigid foams Apr. 4, 2000
6046248 Biodegradable polymers, the preparation thereof and the use thereof for producing biodegradable moldings Apr. 4, 2000
6028019 Water vapor permeable and waterproof polyester membrane pigmented with carbon particles Feb. 22, 2000
6025405 Compositions of polycondensed branched polyester polymers and aromatic polycarbonates, and the closed cell polymer foams made therefrom Feb. 15, 2000
6020387 Low density polymers and methods of making and using same Feb. 1, 2000
6004664 Film having fine voids and manufacture thereof Dec. 21, 1999
5994423 Urine absorber, method for producing it, urine absorbing method utilizing it and portable toilet Nov. 30, 1999
5948830 Mixtures of liquid-crystal polymers and polyarylene sulfoxides, foams made of such mixtures, process for their producing the same and their use Sep. 7, 1999
5945461 Foamed acrylic polymer compositions Aug. 31, 1999
5900320 Foamed plastic and method of manufacturing the same May. 4, 1999
5889069 High temperature syndiotactic styrene polymer foam Mar. 30, 1999
5872155 Latex based on vinyl chloride copolymers with a specific structure, process for the manufacture thereof and applications thereof Feb. 16, 1999
5859083 Water vapor permeable and waterproof polyester membrane pigmented with carbon particles Jan. 12, 1999
5854294 Process for producing foamed body of polycarbonate resin and foamed body obtained thereby Dec. 29, 1998
5849405 Absorbent materials having improved absorbent property and methods for making the same Dec. 15, 1998
5840777 Method of producing polysaccharide foams Nov. 24, 1998
5811493 Paper-like film Sep. 22, 1998
5801206 Concentrates for improving polyester compositions and method of making same Sep. 1, 1998
5786397 Foamable molding compositions Jul. 28, 1998
5780523 Foamed pressure sensitive tapes Jul. 14, 1998
5736586 Biodegradable foamed plastic materials Apr. 7, 1998
5714230 Degradable aliphatic polyester formed products Feb. 3, 1998
5708041 Foamable molding compositions Jan. 13, 1998
5696176 Foamable polyester compositions having a low level of unreacted branching agent Dec. 9, 1997
5691390 Thermoplastic syntactic foams and their preparation Nov. 25, 1997
5672409 Polyester film reflector for a surface light source Sep. 30, 1997
5661193 Biodegradable foamable co-polyester compositions Aug. 26, 1997
5654347 Concentrates for improving polyester compositions and method of making same Aug. 5, 1997
5641549 Cellularized polyesters Jun. 24, 1997
5627219 Formed plastic and method of manufacturing the same May. 6, 1997
5567511 Non-shrinkable and shrinkable foamed polyester film for the labeling of pet containers Oct. 22, 1996
5532295 Thermoplastic syntactic foams and their preparation Jul. 2, 1996
5519066 Foamable branched polyesters May. 21, 1996
5508316 Resin composition capable of exhibiting high melt viscoelasticity, aromatic polyester resin foamed body produced therefrom and process for producing the foamed body Apr. 16, 1996

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