Abstract:
PROBLEM TO BE SOLVED: To provide a polyol composition which provides a polyurethane slab foam excellent in moldability, uniformity of density of a foam block, mechanical physicalities, moisture resistance, etc.SOLUTION: The polyol composition for a polyurethane slab foam contains the following polyoxyalkylene polyol (S) and a foaming agent. The polyoxyalkylene polyol (S) comprises an alkylene oxide adduct of an active hydrogen-containing compound in the presence of a Lewis acid catalyst, wherein 40 mol% or more of the terminal hydroxy group is a primary hydroxy group of a group represented by the following general formula (1): -CRH-CH-OH. A hydroxyl value x, a total unsaturation degree y, and an ethylene oxide content z in (S) satisfies the relation of the specific expression.
Abstract:
PROBLEM TO BE SOLVED: To provide a polyether polyol that has sufficient reactivity as a raw material for the production of a resin without impairing the hydrophobicity of polyether and to provide a polyurethane foam produced from the polyether polyol. SOLUTION: The polyether polyol is a terminal ethylene oxide-added polyether polyol produced by block addition or random and block addition of an alkylene oxide comprising a 3C or more 1,2-alkylene oxide as the main component and an alkylene oxide including an ethylene oxide onto an active hydrogen-containing compound and is produced by adding the 3C or more 1,2-alkylene oxide to the terminal in the presence of a boron trifluoride and furthermore adding an ethylene oxide thereto in the presence of an alkali catalyst. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a polyoxyalkylene alcohol capable of improving the mechanical strength of a polyurethane foam. SOLUTION: This method for producing (A) the polyoxyalkylene alcohol is provided by performing the addition polymerization of (d) an alkylene oxide with (c) an active hydrogen-containing compound in the presence of (a) a catalyst expressed by a specific general formula and (b) a dehydrating agent, then optionally decomposing and/or removing (a) the catalyst and also optionally removing (b) the dehydrating agent as necessary. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To obtain a polyurethane resin which can be produced without using any lead-containing catalyst, can be molded in a short time, and has good water resistance and good weather resistance. SOLUTION: The polyurethane resin is prepared by subjecting an active hydrogen component (A) comprising a high-molecular active hydrogen compound (A1) of a specified composition, a medium-molecular active hydrogen compound (A2), and a low-molecular active hydrogen compound (A3) and an aliphatic polyisocyanate (B) to reaction and curing in the presence of a urethanization catalyst (C) comprising a tertiary amine (C1) and a dialkyl tin organic acid salt (C2) and having a lead content of at most 5 ppm, an antioxidant (D) comprising a piperidine antioxidant (D1) and a phenolic antioxidant (D2), carbon black (E) comprising carbon black particles of a particle diameter of 0.1 to 100 μm and/or a polyether dispersion of the carbon black particles, and optionally a blowing agent (F) and/or other additives (G). COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide polymer polyol giving polyurethane foam improved in foam hardness, mechanical properties and moist resistance. SOLUTION: There is provided a polymer polyol which is provided by adding polymer particles (JR) in a polyol (PL), which particles comprise an ethylenic unsaturated compound (E) as a constituent unit, wherein (PL) is a polymer polyol (A) provided by containing a following polyol (a). Polyol (a): polyoxyalkylene polyol which is an alkylene oxide adduct of an active hydrogen-containing compound (H), in which 40% or more of hydroxy groups positioned at the terminal ends are specific primary hydroxy-containing groups, and wherein the hydroxy value x, the total unsaturation degree y and the ethylene oxide unit content z satisfy the relation of numerical expression (1): y≤28.3×x -2 ×(100-z)/100 (wherein, z is the ethylene oxide unit content and is 0-50 wt.%). COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a flexible polyurethane slab foam which is excellent in physical properties and does not easily become yellowish.SOLUTION: The method for manufacturing a flexible polyurethane slab foam includes reacting a polyole component (A) and an organic polyisocyanate component (B) in the presence of a foaming agent (C) and a urethanization catalyst (D), wherein (A) contains the following polyoxyalkylene polyole (S), and (B) contains an aliphatic isocyanate and/or alicyclic isocyanate. The polyoxyalkylene polyole (S) is an alkylene oxide addition product of a compound (H) containing active hydrogen; wherein at least 40% of hydroxy groups positioned at terminals are primary hydroxy group-containing groups expressed by the formula (1), and a hydroxyl value x, a total unsaturation degree y and the amount of ethylene oxide content satisfy a specific relationship. (In the formula, Rrepresents a hydrogen atom, a 1C-12C alkyl group, a cycloalkyl group or a phenyl group. The 1C-12C alkyl group, the cycloalkyl group or the phenyl group may be substituted with a halogen atom or an aryl group).
Abstract:
PROBLEM TO BE SOLVED: To solve the following problem in a conventional production method: only a polymer polyol having a volume average particle size of the polymer of 1 μm or above is obtained, and therefore hardness, cutting elongation and tear strength of a urethane resin (for example, a urethane foam) using the polymer polyol are inadequate. SOLUTION: In a method of producing the polymer polyol prepared by dispersing polymer particles in the polyol (C), the production method has a step (I) of dispersing a thermoplastic polymer (A) in the polyol (C) at 80-200°C in the presence of a dispersant (E) and optionally in the presence of a thermoplastic agent (F), further, using at least one dispersion mixer (B) selected from a group consisting of a rotary dispersion mixer and a high-pressure dispersion mixer. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a polyoxyalkylene alcohol which does not require a post-treatment step of removing low-boiling volatiles, and in particular to provide a method for producing a polyoxyalkylene alcohol having an improved odor. SOLUTION: The method for producing the polyoxyalkylene alcohol (A) comprises the steps of: continuously or intermittently removing a low-boiling by-produced compound (b) having a boiling point of 150°C or less at a pressure of 0.1 MPa out of the system through a vacuumed line (6) in the presence of a Lewis acid catalyst (a) in a reaction vessel (1); during the above step, supplying an alkylene oxide (d) to an active hydrogen-containing compound (c) in the reaction vessel (1) through a raw material feed line (5) to induce addition polymerization between these compounds; and optionally decomposing and/or removing the Lewis acid catalyst (a). COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a production method of polyurethane foam causing no problem of bleed out of a silicon foam stabilizer from a resin. SOLUTION: The production method of polyurethane foam comprises reacting a polyol (a) with an organic polyisocyanate (b) in the presence of a water-based foaming agent (c), a urethanization catalyst (d), a foam stabilizer (e) and, if required, other additives (f), wherein 0.1-5 pts.mass non-silicon foam stabilizer (e1) represented by a specific general formula is used as the (e) based on 100 pts.mass of the (a). COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To obtain a polyether polyol for non-foamed polyurethane, capable of providing a resin having excellent elongation properties obtained using a prepolymer resulted therefrom. SOLUTION: The invention provides a polyether polyol (A) for non-foamed polyurethane comprising a bifunctional polyether polyol (a), or comprising (a) and a trifunctional or higher active hydrogen compound (b) of 3 mass% or less, in which the number average molecular weight of the polyether polyol (A) is 900-2,200, and a viscosity S of a urethane prepolymer obtained by allowing the polyether polyol (A) and 4,4'-diphenyl methane diisocyanate to react with each other at an equivalent ratio of 1:2 at a reaction temperature of 100°C satisfies the following relation (1): (5.2×10 7 -1.3T 2 )/T≤S≤(7.1×10 7 -1.3T 2 )/T, wherein S is a viscosity (mPa s) of the resulting prepolymer/25°C, and T is a molecular weight of the polyether polyol (A). COPYRIGHT: (C)2007,JPO&INPIT