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.

A method of producing a foam is disclosed. The method includes providing an epoxy-containing compound, a cationic catalyst, an optional blowing agent, and at least one additive. The method further includes combining the epoxy-containing compound with the cationic catalyst, the optional blowing agent, and the at least one additive, wherein the epoxy-containing compound and the cationic catalyst react to polymerize the epoxy-containing compound to provide the foam having a density from about 0.3 lbs/ft.sup.3 to about 5.0 lbs/ft.sup.3 as measured by ASTM D1622. Further disclosed are the foam and a method for installing the foam.

The invention relates to foam materials that are resistant to high temperatures, to the production of same from aromatic polyisocyanates and polyepoxides, and to the use of said foam materials.

Foam compositions are provided. The compositions are prepared from multi-functional acetoacetate esters and multi-functional amines or acrylates. The foam compositions can include one or more additives. The foam compositions can be used for home and commercial insulation, air sealing, sound proofing, structural improvement, and exterior roofing, among other applications. The foam compositions provide advantages of being isocyanate free and offer reduced exposure to isocyanate.

Foam compositions are provided. The compositions are prepared from multi-functional acetoacetate esters and multi-functional amines or acrylates. The foam compositions can include one or more additives. The foam compositions can be used for home and commercial insulation, air sealing, sound proofing, structural improvement, and exterior roofing, among other applications. The foam compositions provide advantages of being isocyanate free and offer reduced exposure to isocyanate.

The present invention relates to a curable resin composition comprising a polyol (A) having an average hydroxyl value of 200 to 1500 mg KOH/g, a polyisocyanate (B), and polymer fine particles (C), and a curable resin composition comprising a polyol (A), a polyisocyanate (B), and polymer fine particles (C), wherein the polyol (A) comprises a polyester polyol (a2) as an essential component, and the amount of the polyester polyol (a2) is not less than 20 parts by mass per 100 parts by mass of the polyol (A).

The present invention relates to a curable resin composition comprising a polyol (A) having an average hydroxyl value of 200 to 1500 mg KOH/g, a polyisocyanate (B), and polymer fine particles (C), and a curable resin composition comprising a polyol (A), a polyisocyanate (B), and polymer fine particles (C), wherein the polyol (A) comprises a polyester polyol (a2) as an essential component, and the amount of the polyester polyol (a2) is not less than 20 parts by mass per 100 parts by mass of the polyol (A).

Antioxidant polymer foams and uses thereof are described herein. These foams are synthesized using a Carboni-Lindsey reaction of 1,2,4,5-tetrazine with a polymer having alkenyl functional groups. The foams feature dihydropyridazine functional groups which can be oxidized to consume surrounding reactive oxidizing chemicals and are consequently antioxidant.

A formulation of polymeric mixtures for the production of cross-linked expanded PVC foams, of the type comprising PVC, isocyanates, anhydrides and one or more nucleating agents, wherein the nucleating agents are composed of nucleating materials having a porosity of 1-100 nm, preferably 2-50 nm. With respect to known formulations for the production of cross-linked PVC foams, a formulation according to the invention offers the advantage of obtaining the desired degrees of stabilization, nucleation and expansion, even without the use of diazocompounds.

A formulation of polymeric mixtures for the production of cross-linked expanded PVC foams, of the type comprising PVC, isocyanates, anhydrides and one or more nucleating agents, wherein the nucleating agents are composed of nucleating materials having a porosity of 1-100 nm, preferably 2-50 nm. With respect to known formulations for the production of cross-linked PVC foams, a formulation according to the invention offers the advantage of obtaining the desired degrees of stabilization, nucleation and expansion, even without the use of diazocompounds.