Abstract: Heat-expandable molded synthetic resin seal and baffle components adapted for use in automobile body cavities or the like are provided which are designed to preferentially expand upon heating in desired directions and to a desired degree, in order to properly seal irregular or special cavity shapes. The molded components of the invention have selected body surface portions thereof UV crosslinked to a depth of up to about 0.5 mm, while other portions of the molded body are not crosslinked; upon heating, the crosslinked portions expand at a slower rate and to a lesser extent than non-crosslinked body portions. The preferred synthetic resin includes a grafted anhydride polymer, a terminal epoxide polymer additive, a blowing agent, a UV photoinitiator and a UV crosslinkable resin system.

Abstract: Disclosed is an acrylic sol for a sound insulating underbody coating. It includes acrylic polymer fine particles, a plasticizer, a filler, a plasticizer, a blocking type urethane resin, a curing agent and a foaming agent. Since it includes the acrylic polymer particles as a major constituent unit, it does not generate a hydrogen chloride gas and dioxins when it is burned. Moreover, since the paint film resulting from the acrylic sol has a net-shaped structure by the cross-linkage reactions of the urethane resin, and since the bulkiness of the paint film is increased by the foaming agent, it has a good cold resistance and adhesion property toward automotive steel plates, and effects a superb chipping resistance and sound insulating performance.

Abstract: A process additive for polyolefin films and foams produces products having reduced aging time and reduced greasiness and reduced grease-like transfer as compared to glycerol monostearate (GMS). Carbon dioxide based blowing agents are suitable. The process additive comprises a fatty acid N-aliphatic alcohol amide of the general formula R—CON(R′)R″. R is a fatty hydrocarbon radical having from about 8 to 30 carbons. R′ typically is hydrogen. R′ can also be an alkyl radical of from about 1 to 6 carbons or an alkyl alcohol radical of from about 1 to 6 carbons. R″ is an alkyl alcohol fragment of from about 1 to 6 carbons. The alkyl alcohol fragments can be monohydric or polyhydric. Secondary fatty monoalkanolamides in which R′ is hydrogen are particularly useful, especially stearamide monoethanolamine (MEA).

Abstract: To provide a microporous film having excellent permeability and mechanical strength as well as excellent SD function at low temperatures and film-breaking resistance at high temperatures. A microporous film made of a resin composition at least comprising 1 to 50% by weight of a ring-opening polymer of an unsaturated condensed alicyclic compound, and 1 to 50% by weight of one or more resin components selected from the group consisting of polyolefins having a weight-average molecular weight of 500000 or less, thermoplastic elastomers and graft copolymers.

Abstract: Semipermeable porous membranes having an average pore diameter in the range 0.01-3 &mgr;m, and porosity in the range 30%-90%, based on semi-crystalline fluoropolymers and the respective preparation process, wherein the semi-crystalline fluoropolymers comprise: (a) from 10 to 70% by moles of ethylene, (b) from 30 to 90% by moles of a fluorinated monomer selected from tetrafluoroethylene, chlorotrifluoroethylene, or mixtures thereof, (c) from 0.1 to 30% by moles, with respect to the total amount of monomers (a) and (b), of a hydrogenated monomer of formula: CH2═CH—(CH2)n—R1  (I) wherein R1=—OR2, or —(O)tC(O)pR2 wherein t and p are integers equal to 0.

Abstract: A novel class of transparent polymeric foams comprising submicron cells and a process for their production is described. The polymers are preferably high glass transition materials and the process comprises saturating a consolidated polymer shape with an inert gas at a temperature above the glass transition temperature of the polymer and under a pressure of at least 9000 psi for a period adequate to dissolve the gas in the polymer shape and then controllably cooling the polymer shape to produce the submicron cell structure.

Abstract: A novel class of transparent polymeric foams from high Tg polymers comprising submicron cells and a process for their production is described. The polymers are preferably high glass transition materials and the process comprises saturating a consolidated polymer shape with an inert gas at a temperature above the glass transition temperature of the polymer and under a pressure of at least 9000 psi for a period adequate to dissolve the gas in the polymer shape and then controllably cooling the polymer shape to produce the submicron cell structure.

Abstract: A laminate comprising a pair of thermoplastic resin members having fluctuation of clearance between the adhesion surfaces thereof, and a thermoplastic material foam layer which adheres the pair of the thermoplastic resin members. This laminate is formed from thermoplastic resin as a whole and can absorb the fluctuation of clearance between the members, and the thermoplastic resin members are firmly adhered with the thermoplastic material foam layer.

Abstract: A silicone rubber is produced by curing a silicone rubber composition which includes (A) a curable organopolysiloxane composition and (B) at least one hollow organic resin filler whereby the filler forms cells in an open-cell state. The open-cell state gives the silicone rubber good cushioning property and a low compression set.

Abstract: A material that is bio-degradable includes a mixture composed of 69.8% of Polyethylene, 30% of starch and 0.2% of foaming agent. The mixture is heated and foamed in a mold or is blown by a blowing molding machine to a desired shape. The material is bio-degradable.

Abstract: Foamed thermoplastic polyolefin elastomer is formed by heating a foamable thermoplastic polyolefin elastomer-containing polymeric composition containing each of a first water-releasing blowing agent which is at least one of metal hydroxide and water hydrate of a salt of a metal of Group 1 or Group 2 of the Periodic Table and a second blowing agent which is neither a metal hydroxide nor a water hydrate of a salt of a metal of Group 1 or Group 2 of the Periodic Table, to a temperature above the melting point of the polyolefin elastomer. The second blowing agent may be a chemical blowing agent and may release, water, a mixture of water and carbon dioxide or another gas, including carbon monoxide, carbon dioxide, and nitrogen.

Abstract: The present invention is a process for producing a thermoplastic foam sheet comprising contacting a molten monovinylidene aromatic or olefinic polymer with a physical blowing agent to form a polymer/blowing agent mixture, and foaming the mixture into a region of lower pressure within a sheet extrusion line, wherein the extrudate is pulled and compressed to form a thermoplastic foam sheet having a uniform thickness.

Abstract: The present invention relates to a process for preparing post-crosslinked polymer bead with increased surface area and pore volume, and suitable pore size, allowing the separation of organic compounds by post-crosslinking gel-type copolymer bead whose crosslinking degree is low and initial surface area is small, or macroporous-type copolymer bead whose crosslinking degree is high and initial surface area is intermediate in the presence of a Friedel-Crafts catalyst, and polymer beads produced thereby. Though the surface area and pore volume of polymer beads may be varied depending on physical properties of copolymer beads and Friedel-Crafts reaction conditions, the present invention provides polymer beads with larger surface area than that of commercially available polymeric adsorbents produced by the conventional method employing a porogen only.

Abstract: Flexible polyurethane, polyacrylic and polybutadiene foams can be obtained with cyclopentane as a blowing agent and are useful as coatings for leather or leather substitutes.

Abstract: The present invention provides thick extruded foam which is extruded polyolefin resin foam having open cells, used for cushion material and packaging material and the like, which exhibits uniform physical product properties, high expansion ratio, and uniform cell diameter. The extruded open cell foam of the present invention is an extruded foam exhibiting an open cell foaming ratio of 50% or greater, the base resin whereof is principally composed of a mixed polymer consisting of 4.5 to 75 parts by weight of component A consisting of an ethylene ionomer resin, 0.5 to 30 parts by weight of component B consisting of a polyolefin resin having a melting point exceeding 120° C., and 20 to 95 parts by weight of component C consisting of one or two or more polymers selected from a group of ethylene-propylene rubbers, styrene elastomers, and polyethylene resins having melting points of 120° C. or lower (where component A+component B+component C=100 parts by weight).

Abstract: A polymer composition for powder foam molding which comprises (A) a polymer having an epoxy group, (B) a peroxide having a temperature for obtaining a half-life of 10 hours of 100° C. or higher, (C) at least one of quaternary ammonium salts and quaternary phosphonium salts, and (D) a thermally decomposable foaming agent. According to the present invention, the polymer composition for powder foam molding, excellent in storage stability, capable of crosslinking and foaming in a short time, capable of giving a foam having a small compression set, excellent surface texture and little skin lack of hiding, powder of the composition, a foam obtained from the composition, a method for producing the foam, and a molded article comprising the foam.

Abstract: This invention provides an expanded open-cell foam polymer composition comprising at least one linear or modified linear polyolefin, at least 50% of the cells being open, and the cells having an average size of at least 1 millimeter. It is desirable that the composition have a sound absorption coefficient as determined by ASTM D 1050 at 1,000 Hz which is greater than 0.15. In preferred foams the composition has an airflow resistivity of less than about 800,000 Rayls/m.

Abstract: The present invention relates to a method of foaming a polymer comprising the steps of providing a composition comprising said polymer and a zeolite in an amount of 0.3% or more based on the weight of said polymer and extruding said composition. The invention further relates to foamed articles and to the use of zeolites as foaming agents in the foaming of polymers.

Abstract: Porous polyvinylarene particles having a apparent density do of 600 to 200 kg/m3, which particles contain a nucleating agent and 2.0% by weight or less, based on the amount of polyvinylarene, of a volatile organic blowing agent. The invention also relates to a process for the preparation of these particles as well as to the use of these particles in the preparation of expanded particles and foamed articles.

Abstract: An object is to provide a synthetic thermoplastic resin extruded foams having excellent thermal insulating properties and a method for producing the same, in which environment friendly water is used as a blowing agent in the most effective way while reducing the amount of blowing agents that affect the environment, and it is feasible to improve the production ratio of small cells in foams made up of large cells and small cells. A synthetic thermoplastic resin extruded foams having a foam density of 15 to 50 kg/m3 and an excellent cell structure which has an average call size of 0.7 mm or smaller or which mainly comprises small cells having a cell size of 0.25 mm or smaller and large cells having a cell size of 0.3 to 1 mm; and a method for producing the foams are provided, wherein the foams contains 0.2 to 10 parts by weight of bentonite, and water is used as a blowing agent.