A method for manufacturing a closed porous composite material includes 1) preparing a mixture that has 30 to 70 parts by weight of water-dispersed resin, 10 to 300 parts by weight of unexpanded thermal expansion microspheres, and 100 to 550 parts by weight of water, and stirring the mixture thoroughly; 2) preparing a carrier; 3) coating the carrier with the mixture acquired in step 1; 4) heating the carrier so that the unexpanded thermal expansion microspheres expand; and 5) repeating steps 3 and 4 multiple times to acquire a closed porous composite material. The closed porous composite material has a large number of closed cavities and polymer walls separating the closed cavities. The closed cavity is 20 μm to 800 μm in size. The ratio of a total volume of the closed cavities to a total volume of the polymer walls is greater than 16.

The combined use of polyol ethers and cationic polyelectrolytes as additives in cosurfactant-containing aqueous polymer dispersions for production of porous polymer coatings, preferably for production of porous polyurethane coatings, is described.

The present invention relates to artificial leather and a method of manufacturing the same. More particularly, the present invention relates to artificial leather for automobile seat covers, the artificial leather having a texture similar to that of natural leather, having a soft feel like natural leather, and having excellent peel strength and a method of manufacturing the artificial leather.

Provided is a synthetic leather including a fibrous substrate, a porous resin layer provided on the fibrous substrate, and a non-porous resin layer provided on the porous resin layer. The synthetic leather has a thickness of 800 μm or more, and a vertical cross-section of the porous resin layer has a pore area ratio of 25% or more.

A non-solvent two-component polyurethane artificial leather composition is provided. The polyurethane composition comprises (A) a polyurethane-prepolymer component, comprising one or more polyurethane-prepolymers prepared by reacting at least one polyisocyanate compound with at least one first polyol, wherein the polyurethane-prepolymer comprises at least two free isocyanate groups; and (B) a polyol component, comprising at least one second polyol; wherein the polyol component further comprises an encapsulated foaming agent comprising at least one foaming core phase encapsulated within an outer shell. The polyurethane leather product derived from the polyurethane composition exhibits enhanced stability, mild bubble generation and improved cost effectiveness. A polyurethane leather product prepared with said composition and the method for preparing the same are also provided.

A method for producing a polyurethane foam sheet, including applying, in sheet form, a mixture obtained by mixing a moisture-curable polyurethane hot melt resin composition (X) containing a urethane prepolymer (i), which is a reaction product between a polyol (A) and a polyisocyanate (B), with a polyol composition (Y) onto a substrate, and bringing the mixture in the sheet form into contact with water vapor to moisture-foam the mixture. The method for producing a polyurethane foam sheet is characterized in that the polyol (A) contains a polytetramethylene glycol or polycarbonate polyol (a1) and a polyol (a2) having a structure derived from an alkylene oxide adduct of bisphenol A, and the polyol composition (Y) contains an amine catalyst (y1) having a foaming constant (Kw) of 10 or more.

Provided is a waterborne polyurethane dispersion. The waterborne polyurethane dispersion is prepared in the presence of a hydrophilic amino siloxane compound and exhibits good anti-stickiness while retaining superior mechanical properties. A laminated synthetic leather article prepared with said waterborne polyurethane dispersion as well the method for preparing the synthetic leather article are also provided.

The present invention relates to a modified polyvinyl butyral material, comprising a polyvinyl butyral composite material, a filler, an anti-hydrolysis agent, a first plasticizer, zinc stearate, calcium stearate, and a polymeric dispersant; wherein the polyvinyl butyral composite material is obtained by plasticizing a composition comprising polyvinyl butyral and a second plasticizer. The present invention also relates to a preparation method of the modified polyvinyl butyral material, a modified polyvinyl butyral product comprising at least one modified polyvinyl butyral layer prepared from a material comprising the modified polyvinyl butyral material, and the preparation method of the modified polyvinyl butyral product.

A composite layer for use in a bedding product such as a mattress and a method of manufacture are disclosed. The composite layer generally includes an extruded three dimensional fibrous layer and a foam material, e.g., polyurethane, latex or the like, disposed within the fibrous layer and occupying at least a portion of the free volume in the layer. Also disclosed are processes for manufacturing a foam-fiber composite.

A method for manufacturing a closed porous composite material includes 1) preparing a mixture that has 30 to 70 parts by weight of water-dispersed resin, 10 to 300 parts by weight of unexpanded thermal expansion microspheres, and 100 to 550 parts by weight of water, and stirring the mixture thoroughly; 2) preparing a carrier; 3) coating the carrier with the mixture acquired in step 1; 4) heating the carrier so that the unexpanded thermal expansion microspheres expand; and 5) repeating steps 3 and 4 multiple times to acquire a closed porous composite material. The closed porous composite material has a large number of closed cavities and polymer walls separating the closed cavities. The closed cavity is 20 μm to 800 μm in size. The ratio of a total volume of the closed cavities to a total volume of the polymer walls is greater than 16.