摘要:
A method for producing a fine-particle-dispersed polyol (I) is provided, the method including the steps (1) and (n−1): the step (1) of polymerizing an ethylenically unsaturated monomer (b) in a polyol (a), in the presence of fine particles (P1) and a radical polymerization initiator (c), so as to obtain a fine-particle-dispersed polyol intermediate (B2); and the step (n−1) of polymerizing (b) in a fine-particle-dispersed polyol intermediate (B(n−1)), in the presence of (c), so as to obtain a fine-particle-dispersed polyol intermediate (Bn) or the fine-particle-dispersed polyol (I), where n represents an integer of 3 to 7, wherein (P1) have a volume-average particle diameter (R1) of 0.01 μm to 1.0 μm, and a concentration of (b) in the step (1) is 7 wt % to 40 wt %. Thus, a method for producing a fine-particle-dispersed polyol can be provided that contains polymer fine particles dispersed in a polyol having a small particle diameter, and that, when it is used for forming a polyurethane resin, allows the polyurethane resin to exhibit excellent resin properties.
摘要:
A polyol composition comprising a polyol (a) and resin fine particles (b) dispersed in the polyol (a), and a method for producing the polyol composition are provided, wherein the resin fine particles (b) are particles such that an arithmetic standard deviation by volume of a particle size distribution of the particles, derived from respective values in 85 divisions of a range of 0.020 to 2000 μm determined by a laser diffraction/scattering particle size distribution analyzer, is not more than 0.6. A resin fine particle-dispersed polyol composition that, even if the resin particles dispersed in the polyol have a small particle diameter, allows the production of a polyurethane resin having an excellent mechanical strength such as elongation at break, and a method for producing the same, are provided.
摘要:
Provided is a polymer polyol which has solved problems, such as clogging in a discharge head and insufficient hardness of a resulting polyurethane foam, occurring in the production of a polyurethane foam by mechanical foaming using a conventional polymer polyol as a raw material. The present invention is a polymer polyol (A) in which polymer fine particles (JR) having an ethylenically unsaturated compound (E) as a constituent unit are contained in a polyol (PL), wherein the (PL) comprises a polyol (a) with which the average number x of moles of ethylene oxide added per active hydrogen atom and the primary hydroxidation ratio y of terminal hydroxyl groups satisfy a specific relationship, and the volume average particle diameter (R) of the (JR) is from 0.1 to 1.5 μm.
摘要:
A polyol composition comprising a polyol (a) and resin fine particles (b) dispersed in the polyol (a), and a method for producing the polyol composition are provided, wherein the resin fine particles (b) are particles such that an arithmetic standard deviation by volume of a particle size distribution of the particles, derived from respective values in 85 divisions of a range of 0.020 to 2000 μm determined by a laser diffraction/scattering particle size distribution analyzer, is not more than 0.6. A resin fine particle-dispersed polyol composition that, even if the resin particles dispersed in the polyol have a small particle diameter, allows the production of a polyurethane resin having an excellent mechanical strength such as elongation at break, and a method for producing the same, are provided.
摘要:
A polymer polyol (A) that comprises a polyol (PL) and polymer particles (JR) having an ethylenically unsaturated compound (E) as a constituent unit and contained in a polyol (PL) is provided, in which a ratio of acrylonitrile in (E) is 0 mol % to 67 mol %, and relationship between a viscosity of the polymer polyol and a content (PC) of the polymer particles satisfies a formula (1) below, and/or satisfies formulae (2) and (3) below: (N1)
摘要:
A polymer polyol (I) is provided that is formed of a polyol (A), polymer particles (B) obtained by polymerization of an ethylenically unsaturated compound (b), and an active-hydrogen-containing compound (d) having an aromatic ring and having a number-average molecular weight of 150 to 2,000, wherein a content of (d) is 1 to 20% on the basis of a weight of (B). The polymer polyol of the present invention contains polymer particles having sufficiently small particle diameters, has a low viscosity, and has excellent handleability. A polyurethane resin obtained by using the polymer polyol of the present invention has excellent mechanical strengths such as elongation at break.
摘要:
A polyol composition comprising a polyol (a) and resin fine particles (b) dispersed in the polyol (a), and a method for producing the polyol composition are provided, wherein the resin fine particles (b) are particles such that an arithmetic standard deviation by volume of a particle size distribution of the particles, derived from respective values in 85 divisions of a range of 0.020 to 2000 μm determined by a laser diffraction/scattering particle size distribution analyzer, is not more than 0.6. A resin fine particle-dispersed polyol composition that, even if the resin particles dispersed in the polyol have a small particle diameter, allows the production of a polyurethane resin having an excellent mechanical strength such as elongation at break, and a method for producing the same, are provided.
摘要:
A polyol composition comprising a polyol (a) and resin fine particles (b) dispersed in the polyol (a), and a method for producing the polyol composition are provided, wherein the resin fine particles (b) are particles such that an arithmetic standard deviation by volume of a particle size distribution of the particles, derived from respective values in 85 divisions of a range of 0.020 to 2000 μm determined by a laser diffraction/scattering particle size distribution analyzer, is not more than 0.6. A resin fine particle-dispersed polyol composition that, even if the resin particles dispersed in the polyol have a small particle diameter, allows the production of a polyurethane resin having an excellent mechanical strength such as elongation at break, and a method for producing the same, are provided.
摘要:
A polymer polyol (I) is provided that is formed of a polyol (A), polymer particles (B) obtained by polymerization of an ethylenically unsaturated compound (b), and an active-hydrogen-containing compound (d) having an aromatic ring and having a number-average molecular weight of 150 to 2,000, wherein a content of (d) is 1 to 20% on the basis of a weight of (B). The polymer polyol of the present invention contains polymer particles having sufficiently small particle diameters, has a low viscosity, and has excellent handleability. A polyurethane resin obtained by using the polymer polyol of the present invention has excellent mechanical strengths such as elongation at break.
摘要:
A polyol composition comprising a polyol (a) and resin fine particles (b) dispersed in the polyol (a), and a method for producing the polyol composition are provided, wherein the resin fine particles (b) are particles such that an arithmetic standard deviation by volume of a particle size distribution of the particles, derived from respective values in 85 divisions of a range of 0.020 to 2000 μm determined by a laser diffraction/scattering particle size distribution analyzer, is not more than 0.6. A resin fine particle-dispersed polyol composition that, even if the resin particles dispersed in the polyol have a small particle diameter, allows the production of a polyurethane resin having an excellent mechanical strength such as elongation at break, and a method for producing the same, are provided.