In the composition according to the embodiment, the content of an unreacted diisocyanate monomer in a urethane-based prepolymer may be controlled to control the physical properties thereof such as gelation time. Thus, since the micropore characteristics, polishing rate, and pad cut rate of a polishing pad obtained by curing the composition according to the embodiment may be controlled, it is possible to efficiently manufacture high-quality semiconductor devices using the polishing pad.

The present invention relates to a method for preparing a foamed thermoplastic polyurethane elastomer product, comprising the steps of: 1) coating a binder: coating the binder on the surfaces of expandable thermoplastic polyurethane elastomer particles; 2) curing and molding: adding the product obtained from step 1) to a mold and then placing it in a vulcanizing machine for curing and molding; and 3) cooling and setting: cooling the mold after the molding in step 2) to obtain the product of the present invention. By means of pre-coating the binder on the surfaces of expanded thermoplastic polyurethane elastomer particles according to the present invention, the weight of the binder can be reduced, and the properties of the expanded thermoplastic polyurethane elastomer particles can be utilized to the maximum extent.

An expandable structural adhesive film for bonding metal parts. The adhesive film comprises at least one first epoxy compound; at least one epoxy curing agent; at least one blowing agent; at least one film-forming agent; and at least one impact modifier. The structural adhesive film exhibits an elongation at break of at least 300% according to tensile test DIN EN ISO 527 and a free expansion rate according to EN 2667-3 of at least 45%.

A foamable polypropylene composition, and foamed polypropylene and a preparation method therefor are provided. The polypropylene composition comprises polypropylene, a polypropylene modifier, a foaming agent, and an optional nucleating agent. A preparation method for the polypropylene modifier comprises: enabling polar monomer grafted polypropylene to be in contact with a component A to react and carrying out extruding pelletizing, wherein a polar monomer in the polar monomer grafted polypropylene can chemically react with the component A; the polar monomer is selected from at least one of dimethylamino methacrylate, epoxy acrylate, trimeric acrylic isocyanurate, and acrylamide; and the component A is selected from at least one of polyisocyanate, polyethylene oxide, and an amido-containing substance. The foamed polypropylene has an obtained foaming ratio of 12 times or more, and also has high tensile and flexural properties.

Provided is a flame retardant and heat insulating sheet having high flame retardancy and a high heat insulating property. Also provided is a flame retardant heat insulator including such flame retardant and heat insulating sheet. A flame retardant and heat insulating sheet according to one embodiment includes: a flame retardant and heat insulating layer formed from a resin composition (A); and a heat insulating layer, wherein the resin composition (A) contains: a binder resin; a low-melting point inorganic substance; a high-melting point inorganic substance; and voids. A flame retardant and heat insulating sheet according to one embodiment includes: a flame retardant and heat insulating layer formed from a resin composition (B); and a heat insulating layer, wherein the resin composition (B) contains: a binder resin that produces a high-melting point inorganic substance when heated; a low-melting point inorganic substance; and voids and/or a void-forming agent.

Provided is a flame retardant and heat insulating material having high flame retardancy and a high heat insulating property. Also provided is a flame retardant heat insulator including such flame retardant and heat insulating material having high flame retardancy and a high heat insulating property. A flame retardant and heat insulating material according to one embodiment is formed from a resin composition (A), wherein the resin composition (A) contains: a binder resin; a low-melting point inorganic substance; a high-melting point inorganic substance; and voids. A flame retardant and heat insulating material according to one embodiment is formed from a resin composition (B), wherein the resin composition (B) contains: a binder resin that produces a high-melting point inorganic substance when heated; a low-melting point inorganic substance; and voids and/or a void-forming agent.

Disclosed are a heat-expandable polyvinylidene chloride microsphere and its preparation method. The preparation method comprises: by weight, dissolving 250 to 550 parts of an aqueous-phase polymerization inhibitor, 20 to 100 parts of a dispersant, and 3 to 15 parts of a co-dispersing monomer in deionized water, adjusting a pH value of the solution and cooling the solution to obtain an aqueous phase for later use; dissolving 5 to 15 parts of a cross-linking agent and 20 to 45 parts of an initiator in 1000 to 2000 parts of a mixed monomer, and cooling the solution to obtain an oil phase for later use; mixing and homogenizing the aqueous phase and the oil phase with stirring to obtain a homogenized mixed solution; adding 300 to 550 parts of a foaming agent to the homogenized mixed solution and homogenizing the resulting solution with stirring to obtain a homogenized mixed solution containing the foaming agent; reacting the homogenized mixed solution containing the foaming agent with stirring; at the end of the reaction, cooling to room temperature, filtering the resulting suspension to obtain filtrate, centrifuging and dehydrating the filtrate, and drying to obtain the heat-expandable polyvinylidene chloride microsphere product. This disclosure has the advantages of simple process and environmental friendliness, and the obtained product has good performance.

The disclosed latex system comprises a one-component, closed-cell, semi-foam, mastic sealant using gas-filled, flexible, organic microspheres to create a product that is elastic and compressible under pressure without protruding in an outward direction when compressed, thereby allowing the applied sealant to compress in an enclosed, maximum-filled channel unlike typical mastic sealants (while retaining the ability to rebound). This allows the sealant to function as a gasket, and, once fully cured, to have properties including vibration damping, insulating, and condensation resistance. The sealant can be formulated as an air barrier or a vapor barrier and at various degrees of moisture resistance. It may be applied by different packaging variations including aerosol can (bag in can or bag on valve), airless sprayer, cartridge tubes, foil tubes, squeeze tubes, and buckets to be applied using a brush, trowel, spatula, etc. The disclosed mastic sealant can also be formulated to be smoke-resistant and flame-resistant.

The present invention relates to a super absorbent polymer. The super absorbent polymer exhibits excellent initial absorption capacity, and thus can provide a sanitary material such as a diaper or a sanitary napkin which can quickly absorb body fluids and impart a dry and soft touch feeling.

The disclosure relates to thermally expandable microspheres comprising a polymeric shell surrounding a blowing agent-containing hollow core, the polymer shell comprising a carboxylate-functionalised cellulose having a glass transition temperature (Tg) of at least about 125° C. The disclosure also relates to a method for preparing such thermally expandable microspheres, comprising mixing an aqueous phase that optionally comprises an emulsifier with an organic phase that comprises an organic solvent, a blowing agent and a carboxylate-functionalised cellulose having a Tg of at about least 125° C., to form a microsphere dispersion.