WO2003054047A1 - Mousse souple de polyurethanne a faible resilience et son procede de production - Google Patents
Mousse souple de polyurethanne a faible resilience et son procede de production Download PDFInfo
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- WO2003054047A1 WO2003054047A1 PCT/JP2002/013315 JP0213315W WO03054047A1 WO 2003054047 A1 WO2003054047 A1 WO 2003054047A1 JP 0213315 W JP0213315 W JP 0213315W WO 03054047 A1 WO03054047 A1 WO 03054047A1
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- polyol
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/16—Catalysts
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4866—Polyethers having a low unsaturation value
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0008—Foam properties flexible
Definitions
- the present invention relates to a low-resilience flexible polyurethane foam using a high-molecular-weight polyol having a low hydroxyl value and a method for producing the same.
- a low-resilience flexible foam obtained by reacting a urethane foam composition containing a polyol (a), a polyisocyanate (b), a catalyst (c), and a blowing agent (d).
- the glass transition point has at least one glass transition point in each of a temperature range of 170 to 120 ° C and a temperature range of 0T to 60 ° C, and the glass transition point is set to a frequency of 10 Hz.
- the peak value of ta ⁇ ⁇ obtained when performing dynamic viscoelasticity measurement the peak value of ta ⁇ ⁇ in the temperature range of 170 to 120 ° C is 0.15 or more
- a low-resilience flexible foam having a peak value of ta ⁇ in a temperature range of 0 ° C to 60 ° C having a value of 0.3 or more is disclosed.
- the polyol (a) has an average number of functional groups of 1.
- Polyol (a-1) with a hydroxyl value of 20-70 mgKOH / g at 5-4.5 and polyol with an average functional number of 1.5-4.5 and a hydroxyl value of 140-300 mgK ⁇ H / g (a (2) and (a-1) are blended at 32 to 80% by weight, and (a-2) is blended at 20 to 68% by weight.
- a temperature range from 170 to 120, preferably from 150 to 125 ° C, and from 0 to 60.
- a flexible foam having at least one or more glass transition points in a temperature range of 30 to 55 is formed.
- the method of blending two or more specific polyols having different hydroxyl values to form a flexible foam as in the above-described conventional technique has a problem that a change in hardness with respect to a change in temperature cannot be sufficiently suppressed.
- the level of durability required for flexible foams has also been increasing. Further, the resilience (the resilience is slightly higher at 5 to 18% in the examples of the above-mentioned publication) is further reduced, and the low resilience with the resilience almost equal to zero is also developed. Is being sought.
- the resilience (rebound resilience) of urethane foam can be generally reduced by adding a plasticizer to a flexible foam, and a desired amount of low resilience can be obtained by adding an appropriate amount of a plasticizer.
- Flexible foam can be obtained.
- the added plasticizer may volatilize during use and be inhaled by the human body, and substances harmful to the human body cannot be used.
- the plasticizer may be eluted by washing the foam, and it is difficult to maintain the low resilience of the foam after repeated washing.
- the present invention has been made in view of the above circumstances, and is a flexible polyurethane foam having excellent durability, excellent low resilience without using a plasticizer, and having a small change in hardness with respect to a temperature change.
- the purpose is to provide. Disclosure of the invention
- the present invention provides the following flexible polyurethane foam and a method for producing the flexible polyurethane foam.
- a flexible polyurethane foam having a core rebound resilience of 30% or less and a glass transition point in a range of ⁇ 80 ° C. to ⁇ 60 ° C.
- the flexible polyurethane foam preferably has a hard segment content of 40% by mass or less.
- the polyol has a hydroxyl value of 5 to 15 mg KOH. / g polyol (1 ), wherein the flexible polyurethane foam according to (I) is produced.
- the polyol (1) is preferably a polyoxyalkylene polyol obtained by subjecting an alkylene oxide to ring-opening addition polymerization using a double metal cyanide complex catalyst. Further, the polyol (1) is preferably a polyoxyalkylene polyol having an oxyalkylene random chain formed using a double metal cyanide complex catalyst.
- a method for producing a flexible polyurethane foam by reacting a polyol and a polyisocyanate compound in the presence of a catalyst, a foam stabilizer and a foaming agent, wherein the polyol has a hydroxyl value of 5 to 15 mg KOHZg.
- a flexible polyurethane foam according to (III) is produced using a polyol mixture comprising a polyol (1) having a hydroxyl value of 40 to 25 OmgKOHZg and a polyol (2) having a functional group number of 2 to 4.
- a method for producing a flexible polyurethane foam is produced using a polyol mixture comprising a polyol (1) having a hydroxyl value of 40 to 25 OmgKOHZg and a polyol (2) having a functional group number of 2 to 4.
- the polyol (1) is preferably a boroxyalkylene polyol obtained by ring-opening addition polymerization of an alkylene oxide using a double metal cyanide complex catalyst.
- the polyol (1) is preferably a polyoxyalkylene polyol having an oxyalkylene random chain formed using a double metal cyanide complex catalyst.
- the flexible foam of the present invention is a low-resilience flexible foam. That is, the flexible foam described in the above (I) (hereinafter referred to as the flexible foam (I).
- the names of the flexible foam (111), the production method (11), and the production method (IV) are used.
- the measurement of the core rebound resilience was performed by a method based on JIS K6400.
- the core refers to a core portion obtained by removing the skin portion from a flexible foam sample so that the skin portion is not affected.
- the flexible foam of the present invention is a low resilience flexible foam, and is suitable as a shock absorber, a sound absorber, and a vibration absorber, and is also suitable as bedding, a mat, a cushion, and a seat.
- the flexible foams (I) and (III) of the present invention are characterized in that the glass transition point is in the range of 180 ° C to 160 ° C.
- the measurement of the glass transition point was performed by a method according to JIS K7244. That is, dynamic viscoelasticity was measured at a frequency of 10 Hz while raising the temperature at a rate of 3 ° C / min in a nitrogen atmosphere, and the outer rise temperature of the storage elastic modulus (E ′) was taken as the glass transition point. .
- the flexible foams (I) and (III) of the present invention have a glass transition point of from 180 to 160, preferably from 170 to 160 ° C.
- the flexible foam (III) of the present invention additionally has a glass transition point of from ⁇ 20 ° C. to less than 0 ° C., more preferably from 110 ° C. to 15 ° C. . That is, the flexible foam (III) has a glass transition point of _80 ° C to 160 ° C and a temperature of 20 ° C to less than 0 ° C. More preferably, the temperature is between 10 ° C and -5 ° C.
- the glass transition point shown here is based on a soft segment derived from a polyol.
- the flexible foam of the present invention has a small change in hardness even at a low temperature, and is preferable because the hardness does not significantly increase at a low temperature. That is, it means that the flexibility at room temperature is maintained even at low temperatures.
- the hard segment content of the flexible foams (I) and (III) is preferably 40% by mass or less, more preferably 30% by mass or less.
- the hard segment is composed of components other than the polyol serving as a soft segment, that is, a polyisocyanate compound and water as a blowing agent. Therefore, the content of the hard segment is represented by the mass% of the total of the polyisocyanate compound and the water of the blowing agent, based on the total amount of the polyurethane resin in the produced flexible foam.
- a crosslinking agent When a crosslinking agent is used, a crosslinking agent having a molecular weight of 200 or less per functional group is included in the hard segment.
- the production methods (II) and (IV) of the present invention are directed to a method for producing a flexible polyurethane foam by reacting a polyol with a polyisocyanate compound in the presence of a catalyst, a foam stabilizer and a foaming agent.
- the flexible foam is manufactured using a polyol (1) having a value of 5 to 15 mgKOH / g.
- a polyol mixture containing a polyol (2) having a hydroxyl value of 40 to 25 OmgKOHZg and a functional group number of 2 to 4 is further used. It is characterized by.
- the flexible foam of the present invention has low resilience by using the specific polyol or the polyol mixture, and can maintain the foam characteristics even at a low temperature under normal temperature conditions. That is, a flexible foam having low resilience and a small increase in hardness at low temperatures can be obtained without using a plasticizer.
- the polyol (1) used in the present invention is a high molecular weight polyol having a hydroxyl value of 5 to 15 mgKOH / g.
- a polyoxyalkylene polyol obtained by subjecting an alkylene oxide to a ring-opening addition polymerization reaction as an initiator is preferable.
- a double metal sulfide complex catalyst is preferable. That is, the polyol (1) preferably has a polyoxyalkylene chain obtained by subjecting an alkylene oxide to ring-opening addition polymerization using a double metal cyanide complex catalyst.
- polyol having a low hydroxyl value and a narrow molecular weight distribution can be produced.
- Polyols having a narrow molecular weight distribution are preferable because they have a lower viscosity than polyols having a broad molecular weight distribution in a similar molecular weight region, and thus foam stability during the production of a flexible foam is improved.
- double metal cyanide complex catalyst for example, those described in JP-B-46-27250 can be used.
- a specific example is zinc hexacyanocobalte.
- Complexes having a salt as a main component are mentioned, and ether and Z or alcohol complexes thereof are preferable.
- ether examples include ethylene glycol dimethyl ether (glyme), diethylene glycol dimethyl ether (diglyme), ethylene glycol mono-tert-butyl ether (METB), ethylene glycol mono-tert-pentyl ether (METP), and diethylene glycol mono-tert-butyl ether (METP).
- DETB ethylene glycol dimethyl ether
- TPME tripropylene glycol monomethyl ether
- tert-butyl alcohol and the like are preferable.
- alkylene oxide examples include ethylene oxide, propylene oxide, 1,2-epoxybutane, and 2,3-epoxybutane.
- the polyol (1) in the present invention preferably has an oxyalkylene random chain formed using a double metal cyanide complex catalyst.
- An oxyalkylene random chain is a structure obtained by supplying ethylene oxide and an alkylene oxide having 3 or more carbon atoms at a predetermined ratio into a reaction system, and performing random ring-opening addition polymerization.
- the alkylene oxide having 3 or more carbon atoms is preferably propylene: .lenoxide. That is, the oxyalkylene random chain is preferably an oxyethyleneoxypropylene random chain obtained by reacting ethylene oxide and propylene oxide.
- the content of the oxyethylene group in the oxyalkylene random chain is preferably 3 to 50% by mass, more preferably 5 to 35% by mass, and more preferably 15 to 30% by mass based on the oxyalkylene random chain. % Is particularly preferred.
- the polyol (1) in the present invention preferably has a terminal oxyethylene block chain formed using an alkali metal catalyst at a molecular terminal. That is, it is preferable to carry out ring-opening addition polymerization of ethylene oxide using an alkali metal catalyst in the final stage of ring-opening addition polymerization of alkylene oxide as a method for producing a polyol.
- the ratio of the terminal oxyethylene block chain that is, the ratio of the oxyethylene group connected to the molecular terminal is preferably from 1 to 10% by mass, more preferably from 1 to 5% by mass, based on the whole polyol.
- the polyol (1) in the present invention preferably has the oxyalkylene random chain and Z or the terminal oxyethylene block chain.
- a compound having 2 to 6 active hydrogen atoms in the molecule is preferable.
- polyhydric alcohols such as ethylene glycol, propylene glycol, 1,4-butanediol, glycerin, trimethylolpropane, penyu erythritol, diglycerin, meso-erythritol, methyl darcoside, glucose, and sorbyl!
- Phenols such as bisphenol A; amines such as ethylenediamine, diethylenetriamine, piperazine, aminoethylbiperazine, diaminodiphenylmethane and monoethanolamine; condensation compounds such as phenolic resin and nopolak resin.
- polyhydric alcohols are preferred. These initiators may be used in combination of two or more, and may be used in combination with an active hydrogen compound such as sucrose having seven or more active hydrogens. Further, a compound obtained by further ring-opening addition of an alkylene oxide to the above compound may be used as the initiator.
- the number of functional groups of the polyol (1) is preferably 2 to 6, more preferably 2.8 to 5.2.
- the number of functional groups means the average value of the number of active hydrogens of the initiator.
- the number of functional groups is 2 or more, it is possible to avoid a problem that physical properties such as permanent set of dry heat of the obtained flexible foam are significantly reduced.
- the hydroxyl value of the polyol (1) is 5 to 15 mgK ⁇ HZg or less, and more preferably 5-1 to less than OmgKOHZg.
- a polyol having a hydroxyl value of 15 mgKOHZg or less it is possible to produce a flexible foam having excellent mechanical properties such as tensile strength and tear strength and a small change in physical properties with temperature. Further, when the hydroxyl value is less than 5 mgKOH / g, the viscosity of the polyol becomes high, so that it becomes practically difficult to produce a flexible foam.
- the degree of unsaturation of the polyol (1) is preferably 0.05 meqZg or less, more preferably 0.04meq / g or less. By setting the degree of unsaturation to not more than 0.05 me QZ g, it is possible to avoid the disadvantage that the durability of the manufactured flexible foam is deteriorated.
- the polyol (2) used in the present invention is a polyol having a hydroxyl value of 40 to 25 OmgKO HZg and having 2 to 4 functional groups.
- a polyoxyalkylene polyol obtained by subjecting the above-described alkylene oxide to ring-opening addition polymerization as an initiator is preferable.
- a double metal cyanide complex catalyst and an alkali metal catalyst are preferable, and an alkali metal catalyst is particularly preferable.
- the alkali metal catalyst include potassium hydroxide (KOH) and cesium hydroxide (CsOH).
- KOH potassium hydroxide
- CsOH cesium hydroxide
- the initiator used for producing the polyol (2) a compound having 2 to 4 active hydrogen atoms in the molecule is used. Specific examples thereof include compounds having an active hydrogen number of 2 to 4 among the examples of the initiator used for producing the polyol (1) described above.
- the polyol (2) has 2 to 4 functional groups.
- the number of functional groups is 2 or more, it is possible to avoid a problem that physical properties such as permanent set of dry heat of the obtained flexible foam are significantly reduced.
- the degree of unsaturation of the polyol (2) is preferably 0.05 meqZg or less, more preferably 0.04medZg or less. By setting the degree of unsaturation to 0.05 me QZg or less, it is possible to avoid the disadvantage that the durability of the produced flexible foam is deteriorated.
- the polyol is used as a polyol.
- a polyol mixture containing the polyol (1) and the polyol (2) is used.
- the total of the polyol (1) or the polyol (1) and the polyol (2) is preferably at least 90% by mass, more preferably at least 95% by mass, 100% by weight is particularly preferred. That is, The polyol may contain other polyols other than the polyol (1) or the polyol (2), but the proportion is preferably 10% by mass or less, and preferably 5% by mass or less in the polyol. More preferably, it is particularly preferred that it is not included. However, the crosslinking agent described below is not considered as a polyol.
- the total unsaturation of the polyol is preferably 0.05 meQ / g or less, more preferably 0.04 meq Zg or less. Better.
- polymer-dispersed polyols in which polymer fine particles are stably dispersed may be used.
- the polymer-dispersed polyol is a dispersion system in which polymer fine particles (dispersoid) are stably dispersed in a base polyol (dispersion medium).
- the polymer of the polymer fine particles include an addition polymerization type polymer and a condensation polymerization type polymer.
- the addition polymerization type polymer can be obtained, for example, by homopolymerizing or copolymerizing monomers such as acrylonitrile, styrene, methyl acrylate and acrylate.
- Examples of the polycondensation polymer include polyester, polyurea, polyurethane, and melamine.
- the presence of the polymer particles in the polyol suppresses the hydroxyl value of the polyol to a low value, and is effective in improving physical properties such as air permeability of the flexible foam.
- the content of the polymer particles in the polymer-dispersed polyol is not particularly limited, but is preferably 50% by mass or less, more preferably 3 to 40% by mass. When the mass of the polyol is used in the calculation, the mass of the polymer fine particles is not included.
- the flexible foam of the present invention is produced by reacting the polyol and the polyisocyanate compound in the presence of a catalyst, a foam stabilizer and a foaming agent.
- the polyisocyanate compound used in the production methods (II) and (IV) of the present invention is not particularly limited.
- Specific examples include tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), polymethylene polyphenyl polyiso- Cyanate (commonly known as MD I), xylylene diisocyanate (XDI)
- polyisocyanates such as (HM D I) and the like, modified forms of prepolymers, modified isocyanurates, modified ureas, modified carbodiimides, and the like.
- TDI, MDI, solid MDI, or modified forms thereof are preferred.
- use of crude MDI or a modified product thereof is preferable in that foam stability is improved, durability is improved, and the like.
- the amount of polyisocyanate compound used is usually represented by the isocyanate index (a value expressed as 100 times the number of isocyanate groups with respect to the total number of active hydrogens such as polyols, crosslinking agents, and water).
- the amount of the polyisocyanate compound used in the present invention is preferably in the range of 40 to 120 in terms of the isocyanate index, and more preferably in the range of 50 to L10.
- any catalyst that promotes the urethanization reaction can be used.
- tertiary amines such as triethylenediamine, bis (2-dimethylaminoethyl) ether, N, N, ⁇ ', N'-tetramethylhexamethylenediamine; potassium acetate, 2-ethylhexanoic acid rim, etc.
- the foam stabilizer those used in the production of ordinary polyurethane foams can be used.
- a silicone-based foam stabilizer, a fluorine-based foam stabilizer, and the like can be mentioned, and a silicone-based foam stabilizer is particularly preferable.
- the silicone-based foam stabilizer is a compound having a polysiloxane chain and a polyoxyalkylene chain.
- the polysiloxane chain means an organopolysiloxane chain having an organic group in a side chain, and examples thereof include a dimethylsiloxane chain.
- polyoxyalkylene chain means a portion to which the same alkylene oxide as described above is added.
- Alkylenoxides include the addition of a block with a single alkylene oxide. Addition, random addition in which two or more alkylene oxides are added at random, and the like, and these additions may be mixed.
- the structure of the foam stabilizer may have a structure in which a polyoxyalkylene chain is grafted as a side chain to the main chain polyxane chain even if it has a block structure of a polysiloxane chain and a polyoxyalkylene chain. There may be.
- a structure in which a polyoxyalkylene chain is grafted as a side chain to a polysiloxane chain of a main chain is preferable from the viewpoint of good moldability of a flexible foam.
- the silicone-based foam stabilizer defined below is most preferable.
- the silicone content of the foam stabilizer is preferably from 10 to 50% by mass, more preferably from 30 to 50% by mass.
- the silicone content is the proportion of polysiloxane chains in the foam stabilizer, and the rest is polyoxyalkylene chains.
- the content of ethylene oxide in the foam stabilizer the content of oxyethylene groups in the polyoxyalkylene chain is preferably 70 to 100% by mass, and 90 to 100% by mass. More preferred.
- the chain length of the polyoxyalkylene chain is preferably 100 or less, more preferably 500 or less.
- the polyoxyalkylene chain preferably has a hydroxyl group at a terminal.
- not all terminals need to be hydroxyl groups, and those in which a hydrogen atom of the hydroxyl group is substituted with a monovalent organic group may be included.
- the ratio of hydroxyl groups among the terminals is preferably 50 to 100 mol%, more preferably 70 to 100 mol%, It is particularly preferable that 100 mol%, that is, the entire terminal is a hydroxyl group.
- Examples of the monovalent organic group include an alkyl group such as a methyl group, an ethyl group, and an isopropyl group; an aryl group such as a phenyl group; an acyl group such as an acetyl group; Organic groups are preferred.
- the amount of the foam stabilizer used is preferably from 0.01 to 5 parts by mass, more preferably from 0.1 to 5 parts by mass, based on 100 parts by mass of the polyol (not including the crosslinking agent). ⁇ 2 parts by mass is more preferred.
- the foaming agent is not particularly limited, and a known foaming agent such as a fluorinated hydrocarbon can be used, but at least one selected from water and an inert gas is preferable. Specific examples of the inert gas include air, nitrogen, and carbon dioxide. Of these, water is preferred.
- the amount of the foaming agent is not particularly limited, but when water is used, the amount is preferably 10 parts by mass or less, more preferably 0.5 to 4 parts by mass, based on 100 parts by mass of the polyol mixture.
- a cross-linking agent can be used if necessary.
- a compound having two or more functional groups having active hydrogen such as a hydroxyl group, a primary amino group or a secondary amino group is preferable.
- a polyol compound having a hydroxyl value of 50 mg KOH / g or more and a functional group number exceeding 4 is considered to be a crosslinking agent, and a polyol which does not correspond to this is selected from any of the above polyol mixtures (polyol). (1), (2) or other polyols).
- two or more crosslinking agents may be used in combination.
- polyhydric alcohols such as dextrose, sorbitol, and sucrose
- polyols obtained by adding alkylenoxide to polyhydric alcohols
- Examples include
- the foaming stability is good, and a flexible foam can be produced. .
- a high molecular weight polyol is used, A low-density flexible foam, which has been difficult to foam, can also be produced.
- the use of a cross-linking agent improves the durability compared to the case where it is not used.
- foaming stability tends to be particularly improved when a compound having a relatively high molecular weight, for example, a compound having a molecular weight of 400 or more is used.
- additives can be used in addition to the above-mentioned catalyst, foaming agent, foam stabilizer, and crosslinking agent.
- Additives include fillers such as potassium carbonate and barium sulfate; surfactants such as emulsifiers; aging inhibitors such as antioxidants and ultraviolet absorbers; flame retardants, plasticizers, coloring agents, and antifungal agents. , A foam breaker, a dispersant, a discoloration inhibitor and the like.
- a method for forming the flexible foam of the present invention a method of injecting the reactive mixture into a closed mold and foam-forming (molding method) or a method of foaming the reactive mixture in an open system (slab method) Good, but the slab method is preferred. Specifically, it can be performed by a known method such as a one-shot method, a semi-prepolymer method, or a prepolymer method. For the production of polyurethane, a commonly used production apparatus can be used.
- the number of functional groups of the polyol used in Examples 1 to 27 below, the content of oxyethylene (EO) group in the oxyalkylene random chain (% by mass), the hydroxyl value (mg KO HZ g) and the degree of unsaturation (me cj Z g) is shown in Table 1.
- the measurement of the degree of unsaturation was carried out by a method based on JIS K15757.
- the “DMC-glyme” catalyst used in the production of polyols A and B described below refers to a zinc hexocyanocobaltate ethylene glycol dimethyl ether complex catalyst, and is used in the production of polyols C to H.
- the “KOH” catalyst refers to a potassium hydroxide catalyst.
- NCO index is an isocyanate index value indicating the amount of the isocyanate compound used.
- Crosslinking agent In the presence of 182 g of sorbitol as an initiator, 6345 g of propylene oxide and then 300 g of ethylene oxide were reacted at about 100 ° C using a KOH catalyst. After the reaction, it is treated with an adsorbent and filtered to obtain a hydroxyl value of 56. OmgKOH / g The obtained polyol was used as a crosslinking agent.
- Catalyst a Triethylenediamine in dipropylene glycol (DPG) solution (Tosoh Corporation, trade name: TEDA L-33)
- Catalyst b tin octoate (Air Products and Chemicals, trade name: DABCO T-9)
- Foam stabilizer a Silicone foam stabilizer (manufactured by Nippon Tunicer Co., Ltd., product name: L-1 5309)
- Foaming agent c Silicone-based foam stabilizer (manufactured by Nippon Tunicer Co., Ltd., product name: L-580)
- Isoocyanate compound a: TD I-80 (2, 4-TD 1/2, 6—TD I 80Z20 mass% Of isocyanate group content of 48.3% by mass (manufactured by Nippon Polyurethane Industry Co., Ltd., trade name: Coronate).
- Isocyanate compound b Polyol A was reacted with TDI-80 at 70 ° C. for 3 hours in a nitrogen atmosphere to obtain an isocyanate group-terminated prepolymer (isocyanate group content: 45.2% by mass).
- Isocyanate compound c TDI-80 was reacted with polyol B at 70 ° C. for 3 hours in a nitrogen atmosphere to obtain an isocyanate group-terminated prepolymer (isocyanate group content: 46.5% by mass).
- the liquid temperature of the mixture (polyol system) of all raw materials other than the polyisocyanate compound was adjusted to 50 ° C ⁇ 1 ° C, and the polyisocyanate compound solution was prepared. Adjust the liquid temperature to 20 ° C, add a predetermined amount of the polyisocyanate compound to the polyol system, and mix the total amount of 1 kg with a high-speed mixer for 5 seconds. Were injected into wooden boxes of 300 mm each. The flexible foam was taken out and left in a room where the temperature and humidity were adjusted to room temperature (23 ° C) and humidity 50% for 24 hours or more, and then various physical properties were measured. Molding Evaluation: No shrinkage after foaming, No shrinkage after foaming but returns to normal after several times of crushing, Shrinkage after foaming, no return after several times of crushing Those were rated as X.
- Tables 2 to 5 show the measurement results.
- the measurement method of foam physical properties is based on the following. Regarding the core density and the rebound resilience, a foam cut out to a size of 100 mm in length and width and 50 mm in height, excluding the skin portion, from the center of the foam was used for the measurement.
- the following shows the standards used for measuring the physical properties of the flexible foam.
- Core density (unit: kgZm 3 ), 25% hardness (I LD) (23 ° C) (unit: N / 3 14 cm 2 ), CLD hardness (unit: NZcm 2 ), air permeability (unit: ft 3 min (SI conversion: 28.3 L / min)).
- Core rebound resilience (unit:%), tear strength (unit: NZcm), tensile strength (unit: kPa), elongation (unit:%), Dry heat compression set (unit:%) and hysteresis loss (unit:) are based on JISK 6400.
- the glass transition point was determined by measuring dynamic viscoelasticity by a method according to JIS K 7244. The measurement was performed at a frequency of 10 Hz using a DMS 6100 manufactured by Seiko Instruments Inc. while raising the temperature at 3 ° C. Z min in a nitrogen atmosphere. The temperature at which the storage temperature ( ⁇ ') rises was measured and defined as the glass transition point. Those having a single glass transition point are described in glass transition point 1, those having multiple glass transition points are defined as glass transition point 1 on the low temperature side of the glass transition point, and the other is defined as glass transition point 2 And
- Core resilience 1 is the core resilience measured at room temperature (23 ° C)
- core resilience 2 is the core resilience measured at low temperature (0 ° C).
- 0 hardness 1 is the CLD hardness measured at room temperature (23 ° C)
- CLD hardness 2 is the CLD hardness measured at low temperature (-25 ° C)
- the hardness ratio is the CLD hardness 2 It is the value obtained by dividing the value by the value of CLD hardness 1. If this hardness ratio is close to 1, it can be said that the hardness change with temperature change is small. (Table 2)
- Example 9 1 0 1 1 1 2 1 3 1 4 Polyol E 100 80 100-One polyol F-20-100 one-Polyol G--One-100-Polyol H------100 Total unsaturation ( neQ / g) 0.010 0.022 0.010 0.049 0.1 10 0.089 Crosslinking agent-10 ⁇ 10 10 10 Blowing agent 3.0 3.5.4 5.0 5.0 2.0 5.
- NC INDEX 80 80 1 10 nnu QH Heart 'Segant (%) 28 5 1 R 5 40. 4 34 9 25.6 Glass transition occupation 1 ()-63.0 -63 4 -41.5- 32 1 -4. O -30 1 Glass transition occupancy 2 (V.) -10. 7-8.95 5 1 Formability ooo ⁇ ⁇ ⁇ Core density (kg / m 3 ) 61. 4 70. 2 20. 1 55.1 22.5 50.9
- the flexible foams of Examples 1 to 8 and 15 to 23 manufactured using the specific polyol (1) have glass transition points of ⁇ 80 ° C. to ⁇ 60 ⁇ . Exists. At the same time, the rebound resilience is 30% or less regardless of the measurement temperature, and the change in hardness with temperature is small. Also, it has excellent mechanical properties such as tear strength, tensile strength and elongation. Also, the dry heat compression set, which is an index of durability, is as small as 5% or less, and the durability is good. In particular, the flexible foams of Examples 15 to 23 produced using a mixture of the polyol (1) and the polyol (2) exhibit a very low rebound resilience.
- a high resilient foam can be obtained by increasing the content of the hard segment.
- the flexibility of the foam is lost.
- a high-molecular-weight polyol particularly a high-molecular-weight polyol having an oxyalkylene random chain
- a flexible foam having a low hard segment content, excellent flexibility, and low rebound can be obtained. That is, according to the present invention, it is possible to produce a flexible polyurethane foam having excellent durability, excellent low resilience without using a plasticizer, and a small change in hardness with respect to a temperature change.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60232270T DE60232270D1 (de) | 2001-12-21 | 2002-12-19 | Polyurethanweichschaumstoff mit geringer rückprallelastizität und herstellungsverfahren dafür |
AT02805484T ATE430770T1 (de) | 2001-12-21 | 2002-12-19 | Polyurethanweichschaumstoff mit geringer rückprallelastizität und herstellungsverfahren dafür |
AU2002357617A AU2002357617A1 (en) | 2001-12-21 | 2002-12-19 | Low-resilience flexible polyurethane foam and process for producing the same |
EP02805484A EP1457508B1 (en) | 2001-12-21 | 2002-12-19 | Low-resilience flexible polyurethane foam and process for producing the same |
JP2003554760A JP3909598B2 (ja) | 2001-12-21 | 2002-12-19 | 低反発軟質ポリウレタンフォームの製造方法 |
KR1020047009327A KR100930000B1 (ko) | 2001-12-21 | 2002-12-19 | 저반발 연질 폴리우레탄 폼 및 그 제조방법 |
US10/869,931 US20040229970A1 (en) | 2001-12-21 | 2004-06-18 | Low-resilience flexible polyurethane foam and process for producing the same |
US11/385,933 US7388037B2 (en) | 2001-12-21 | 2006-03-22 | Low-resilience flexible polyurethane foam and process for producing the same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-388952 | 2001-12-21 | ||
JP2001388952 | 2001-12-21 | ||
JP2001392354 | 2001-12-25 | ||
JP2001-392354 | 2001-12-25 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/869,931 Continuation US20040229970A1 (en) | 2001-12-21 | 2004-06-18 | Low-resilience flexible polyurethane foam and process for producing the same |
Publications (1)
Publication Number | Publication Date |
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WO2003054047A1 true WO2003054047A1 (fr) | 2003-07-03 |
Family
ID=26625203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/013315 WO2003054047A1 (fr) | 2001-12-21 | 2002-12-19 | Mousse souple de polyurethanne a faible resilience et son procede de production |
Country Status (10)
Country | Link |
---|---|
US (2) | US20040229970A1 (ja) |
EP (2) | EP1457508B1 (ja) |
JP (1) | JP3909598B2 (ja) |
KR (1) | KR100930000B1 (ja) |
CN (1) | CN100408609C (ja) |
AT (1) | ATE430770T1 (ja) |
AU (1) | AU2002357617A1 (ja) |
DE (1) | DE60232270D1 (ja) |
TW (1) | TWI278459B (ja) |
WO (1) | WO2003054047A1 (ja) |
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JP2005270648A (ja) * | 2004-02-26 | 2005-10-06 | Sanyo Chem Ind Ltd | 保冷具 |
JP2005301000A (ja) * | 2004-04-13 | 2005-10-27 | Inoac Corp | 防音材 |
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KR101795111B1 (ko) | 2010-10-01 | 2017-11-07 | 다우 글로벌 테크놀로지스 엘엘씨 | 저밀도 고탄성 가요성 폴리우레탄 폼의 제조 방법 |
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US10351654B2 (en) | 2011-07-25 | 2019-07-16 | Saudi Aramco Technologies Company | Polymer compositions and methods |
US10982036B2 (en) | 2011-07-25 | 2021-04-20 | Saudi Aramco Technologies Company | Polymer compositions and methods |
JP2013042829A (ja) * | 2011-08-23 | 2013-03-04 | Inoac Corp | クッション体およびクッション体の評価方法 |
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JP2014141548A (ja) * | 2013-01-22 | 2014-08-07 | Mitsubishi Chemicals Corp | ポリウレタンの製造方法 |
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WO2018163825A1 (ja) * | 2017-03-06 | 2018-09-13 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JPWO2018163825A1 (ja) * | 2017-03-06 | 2020-01-09 | 住友ゴム工業株式会社 | 空気入りタイヤ |
JP7135863B2 (ja) | 2017-03-06 | 2022-09-13 | 住友ゴム工業株式会社 | 空気入りタイヤ |
Also Published As
Publication number | Publication date |
---|---|
EP1916271A1 (en) | 2008-04-30 |
AU2002357617A1 (en) | 2003-07-09 |
EP1457508A1 (en) | 2004-09-15 |
ATE430770T1 (de) | 2009-05-15 |
US20060160912A1 (en) | 2006-07-20 |
CN1606580A (zh) | 2005-04-13 |
EP1457508A4 (en) | 2006-12-20 |
CN100408609C (zh) | 2008-08-06 |
KR20040068252A (ko) | 2004-07-30 |
TWI278459B (en) | 2007-04-11 |
US7388037B2 (en) | 2008-06-17 |
EP1916271B1 (en) | 2012-08-08 |
KR100930000B1 (ko) | 2009-12-07 |
TW200301270A (en) | 2003-07-01 |
JPWO2003054047A1 (ja) | 2005-04-28 |
US20040229970A1 (en) | 2004-11-18 |
EP1457508B1 (en) | 2009-05-06 |
JP3909598B2 (ja) | 2007-04-25 |
DE60232270D1 (de) | 2009-06-18 |
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