This provides a flexible, porous, dissolvable solid sheet article having large pores on its top surface as well as a method of making the same.

The present invention aims to provide a composition which can provide molded foams and foamed electric wires having a small average cell size and a high expansion ratio. The composition of the present invention includes a fluororesin; and boron nitride having an average particle size of 10.5 m or greater, or boron nitride having a particle size distribution represented by (D84D16)/D50 of 1.2 or lower.

Disclosed herein are compositions comprising hydrofluoroolefin blowing agents and a polyol blend useful in forming foams. Also disclosed are methods for forming a foam comprising the aforementioned compositions.

The present invention relates to a process for the production of polyurethanes where (a) polyisocyanate, (b) polymeric compounds having groups reactive toward isocyanates, (c) catalysts, (d) a CH-acidic compound of the general formula R.sup.1CH.sub.2R.sup.2, where R.sup.1 and R.sup.2 independently of one another are an electron-withdrawing moiety of the general formula C(O)R.sup.3 or CN, where the moiety R.sup.3 is selected from the group consisting of NH.sub.2, NHR.sup.4NR.sup.5R.sup.6, OR.sup.7 or R.sup.8, where R.sup.4, R.sup.5, R.sup.6, R.sup.7, and R.sup.8 are independently selected from the group consisting of aliphatic, araliphatic or aromatic hydrocarbons, which may have substitution, and optionally (e) blowing agent, (f) chain extender and/or crosslinking agent, and (g) auxiliaries and/or additives are mixed to give a reaction mixture, and the reaction mixture is allowed to complete a reaction to give the polyurethane. The present invention further relates to polyurethanes produced by this process and to the use of these polyurethanes in the interior of means of transport.

Carbon black-containing composite resin pre-expanded particles comprising 100 to 400 parts by mass of a polystyrene-based resin with respect to 100 parts by mass of a carbon black-containing polyolefin-based resin; having a carbon black content of 0.5 to 5.0% by mass and a bulk density of 0.015 to 0.25 g/cm.sup.3; and having an outermost layer of 30 to 80 pm after undergoing the following tests: (a) one of the carbon black-containing composite resin pre-expanded particles is sliced into a 1-mm slice in such a way that cross-section surfaces of cells are exposed on both surfaces of the slice; (b) the obtained slice is immersed in toluene at 25 C. for 24 hours to extract a polystyrene-based resin component as described above; (c) the cross-section surface of the slice is then subjected to magnified photographing by a microscope; (d) the obtained microscope image is observed.

The invention pertains to a process for manufacturing a thermoset polymer foam, comprising the steps ofsubjecting a reaction mixture comprising surfactant and a prepolymer to an agitation step, the prepolymer being obtained by polymerisation of a combination of polyol monomers and polycarboxylic acid monomers, of hydroxycarboxylic acid monomers, or of a combination of polyol monomers and polycarboxylic acid monomers and hydroxy carboxylic acid monomers, the prepolymer having an extent of polymerisation between 0.1 and 0.8, andsubjecting the reaction mixture thus obtained to a curing step in the absence of agitation, to obtain a thermoset polymer foam, wherein the surfactant comprises an ampholytic surfactant, the total surfactant concentration being in the range of 0.1-6 wt. %. A thermoset polymer foam comprising a polymer obtained by polymerisation of a combination of polyol monomers and polycarboxylic acid monomers, of hydroxycarboxylic acid monomers, or of a combination of polyol monomers and polycarboxylic acid monomers and hydroxy carboxylic acid monomers, and an ampholytic surfactant, the total surfactant concentration being in the range of 0.1-6 wt. %, the polymer having an extent of polymerisation of at least 0.8 and a density of at most 850 gram/liter is also claimed.

An inventive electrically conductive rubber composition contains: a rubber component including SBR and/or NBR, and 20 to 30 parts by mass of epichlorohydrin rubber based on 100 parts by mass of the overall rubber component; a crosslinking component; a foaming component; and a potassium salt of an anion having a fluoro group and a sulfonyl group in its molecule, the potassium salt being present in a proportion of not less than 0.01 part by mass and not greater than 1 part by mass based on 100 parts by mass of the overall rubber component. An inventive transfer roller (1) includes a roller body (2) formed from the electrically conductive rubber composition.

Provided is a conductive foam roll having a high surface opening ratio that achieves both cleaning performance and low resistance. A conductive foam roll 10 includes a shaft body 12 and a conductive foam layer 14 around the shaft body 12, wherein the conductive foam layer 14 has a surface opening ratio of 50% to 90%, and wherein the conductive foam layer 14 contains an ionic conductive agent that contains salt of diallyl-type ammonium cations, and at least one selected from the group consisting of N,N-bis(trifluoromethanesulfonyl)imide anions, and N,N-bis(fluorosulfonyl)imide anions.

According to an example aspect of the present invention, there is provided a method for foam assisted drying of nano- and microfibrillated cellulose, which is easily up-scalable and cost-efficient.

The present invention relates to a method for producing polyurethane foams by reacting an isocyanate component with an isocyanate-reactive component comprising at least one polyethercarbonate polyol, the reaction taking place in the presence of a component K selected from one or more compounds from the group consisting of K1 esters of mono- or polybasic carboxylic acids whose (first) dissociation has a pKa of 0.5 to 4.0, K2 mono-, di- and polysulfonates of mono- and polyfunctional alcohols, and K3 one or more compounds from the group consisting of K 3.1 esters of phosphoric acid, phosphonic acid, phosphorous acid, phosphinic acid, phosphonous acid and phosphinous acid, these esters each containing no POH group, K3.2 oligomeric alkyl phosphates of the general formula (II), where a is an integer from 1 to 10, b is an integer from 1 to 10, R1, R2, R3 and R4 are alkyl groups having at least one carbon, and R1, R2, R3 and R4 are alike or, independently of one another, different, and R5 is a linear alkylene group having at least two carbons or is a branched alkylene group having at least three carbons, and K3.3 comprises oligomeric alkyl phosphates of the general formula (III), where a is an integer from 1 to 10, b is an integer from 1 to 10, R1, R4 and R5 are linear alkylene groups having at least two carbons or are branched alkylene groups having at least three carbons, and R1, R4 and R5 are alike or, independently of one another, different, and R2 and R3 are alkyl groups having at least one carbon, and R2 and R3 are alike or, independently of one another, different. The invention also relates to polyurethane foams produced by the method of the invention and to the use thereof.