WO2015163392A1 - 自動車内装材用樹脂成形品 - Google Patents
自動車内装材用樹脂成形品 Download PDFInfo
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- WO2015163392A1 WO2015163392A1 PCT/JP2015/062336 JP2015062336W WO2015163392A1 WO 2015163392 A1 WO2015163392 A1 WO 2015163392A1 JP 2015062336 W JP2015062336 W JP 2015062336W WO 2015163392 A1 WO2015163392 A1 WO 2015163392A1
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- diol
- thermoplastic urethane
- urethane urea
- carbon atoms
- urea resin
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- 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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4205—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups
- C08G18/4208—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups
- C08G18/4211—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups derived from aromatic dicarboxylic acids and dialcohols
- C08G18/4216—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups derived from aromatic dicarboxylic acids and dialcohols from mixtures or combinations of aromatic dicarboxylic acids and aliphatic dicarboxylic acids and dialcohols
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- 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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4205—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups
- C08G18/4208—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups
- C08G18/4211—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups derived from aromatic dicarboxylic acids and dialcohols
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/36—Feeding the material on to the mould, core or other substrate
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- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/2815—Monohydroxy compounds
- C08G18/282—Alkanols, cycloalkanols or arylalkanols including terpenealcohols
- C08G18/2825—Alkanols, cycloalkanols or arylalkanols including terpenealcohols having at least 6 carbon atoms
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- C08G18/30—Low-molecular-weight compounds
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- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3819—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen
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- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4202—Two or more polyesters of different physical or chemical nature
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
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- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/003—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/18—Slush casting, i.e. pouring moulding material into a hollow mould with excess material being poured off
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- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
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- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
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- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
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- C08G2140/00—Compositions for moulding powders
Definitions
- the present invention relates to a resin molded product for automobile interior material obtained by slush molding a powdered thermoplastic urethane urea resin composition.
- the slush molding method has advantages such as the ability to easily form products with complex shapes (undercut and deep drawing, etc.), uniform thickness, and good material yield rate. It is widely used in applications centering on adhesives and the like.
- soft polyvinyl chloride powder has been mainly used, but in recent years, a polyurethane resin has also been used (see, for example, Patent Document 1).
- the skin for instrument panels of automobile interior materials is required to reduce the thickness of the skin from the viewpoint of cost reduction, and it is necessary to satisfy a higher resin strength than the normal skin strength when reducing the thickness. .
- the skin with high resin strength has a slow elasticity of resin when cooled after thermoforming, and the skin is deformed and wrinkles are generated at the time of skin demolding or real stitch sewing for high design. happenss.
- a resin material having low resin strength cannot be thinned due to the occurrence of tearing of the skin when the film is thin, or deterioration in heat resistance.
- An object of the present invention is to provide a resin molded product for an automobile interior material that achieves both a resin strength that can be thinned and a crease.
- the present invention relates to a polymer diol (a) having a number average molecular weight of 500 to 5,000, a linear alkanediol (b) having 4 to 6 carbon atoms, a monool (c), a diamine having 6 to 10 carbon atoms ( a powdery thermoplastic urethane urea resin composition comprising the thermoplastic urethane urea resin (U) obtained by reacting d) and the organic diisocyanate (e) and an additive and satisfying the following (1) to (5):
- P is a resin molded product for automobile interior materials formed by slush molding.
- a polyester diol (a1) obtained by reacting an aromatic dicarboxylic acid (f1) having 8 to 12 carbon atoms with ethylene glycol, and an aliphatic dicarboxylic acid having 4 to 15 carbon atoms as the polymer diol (a).
- a polyester diol (a2) obtained by reacting an acid (f2) with an aliphatic diol (g) having 2 to 6 carbon atoms;
- the ratio of the weight of (b) to the total weight of (a), (b), (c), (d) and (e) is 0.4 to 1.0% by weight. is there; (3)
- the resin molded product for automobile interior materials of the present invention has high resin strength and excellent crease resistance.
- the resin molded product for automobile interior materials of the present invention comprises a polymer diol (a) having a number average molecular weight (hereinafter abbreviated as Mn) of 500 to 5,000, a linear alkanediol (b) having 4 to 6 carbon atoms, Powdered thermoplastic urethane urea resin containing thermoplastic urethane urea resin (U) obtained by reacting monool (c), diamine (d) having 6 to 10 carbon atoms and organic diisocyanate (e) and an additive It is obtained by slush molding the composition (P).
- Mn number average molecular weight
- the Mn of the diol in the present invention is a value calculated from the hydroxyl value of the diol measured according to JIS K 1557-1 (Plastics—Polyurethane raw material polyol test method—Part 1: Determination of hydroxyl value). is there.
- the high molecular diol (a) having an Mn of 500 to 5,000 used for the thermoplastic urethane urea resin (U) is obtained by reacting an aromatic dicarboxylic acid (f1) having 8 to 12 carbon atoms with ethylene glycol. And a polyester diol (a2) obtained by reacting an aliphatic dicarboxylic acid (f2) having 4 to 15 carbon atoms with an aliphatic diol (g) having 2 to 6 carbon atoms.
- aromatic dicarboxylic acid (f1) having 8 to 12 carbon atoms examples include terephthalic acid, isophthalic acid, and orthophthalic acid.
- Examples of the aliphatic dicarboxylic acid having 4 to 15 carbon atoms (f2) include succinic acid, adipic acid, sebacic acid, glutaric acid, azelaic acid, maleic acid and fumaric acid.
- the Mn of the polyester diol (a1) is usually 500 to 5,000, preferably 1,500 to 3,000 from the viewpoint of tensile strength and elongation.
- Examples of the aliphatic diol (g) having 2 to 6 carbon atoms include ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol and 1,6-hexanediol. From the viewpoint of low temperature characteristics such as embrittlement, 1,4-butanediol is preferred.
- the Mn of the polyester diol (a2) is usually 500 to 5,000, and preferably 800 to 1,500 from the viewpoint of low temperature characteristics such as embrittlement.
- the weight ratio [(a1) :( a2)] of the polyester diol (a1) and the polyester diol (a2) is preferably 5:95 to 30:70 from the viewpoint of low temperature characteristics such as embrittlement.
- the polymer diol (a) may further contain a polyester diol (a3) other than (a1) and (a2), a polyether diol (a4), a polyether ester diol (a5), and the like.
- (A) may be used individually by 1 type, or may use 2 or more types together.
- polyester diol (a3) other than (a1) and (a2) examples include (1) a low molecular diol obtained by removing ethylene glycol from a low molecular diol (h) having an Mn of less than 500 and an aromatic having 8 to 12 carbon atoms.
- the low molecular weight diol (h) having an Mn of less than 500 includes aliphatic diols having 2 to 8 carbon atoms [linear diols (ethylene glycol, diethylene glycol, 1,3-propanediol, 1,4-butanediol, 1, 5-pentanediol and 1,6-hexanediol), branched chain diols (propylene glycol, neopentyl glycol, 3-methyl-1,5-pentanediol, 2,2-diethyl-1,3-propanediol) And 1,2-, 1,3- or 2,3-butanediol, etc.]; a diol having a cyclic group [an alicyclic group-containing diol having 6 to 15 carbon atoms ⁇ 1,4-bis (hydroxymethyl) Cyclohexane and hydrogenated bisphenol A ⁇ , aromatic ring-containing diol having 8 to 20 carbon atoms (m
- lactone monomer examples include ⁇ -butyrolactone, ⁇ -caprolactone, ⁇ -valerolactone, and a mixture of two or more thereof.
- polyester diol (a3) other than (a1) and (a2) include polycaprolactone diol, polyvalerolactone diol, and polyhexamethylene carbonate diol.
- polyether diol (a4) examples include AO adducts of the low molecular diol (h). Among these, AO adducts of bisphenols are preferred, and ethylene oxide adducts of bisphenols are more preferred. It is.
- polyester diols (a1) to (a3) in which the above polyether diol (a4) is used in place of the low-molecular diol as a raw material for example, 1 of the above polyether diol (a4)
- examples thereof include those obtained by polycondensation of at least one species with one or more of the aromatic dicarboxylic acid (f1) or aliphatic dicarboxylic acid (f2) exemplified as the raw material of the polyester diol and these ester-forming derivatives.
- Mn of the polyester diol (a3), polyether diol (a4) and polyetherester diol (a5) is preferably 500 to 5,000, more preferably 1,500 to 3 from the viewpoint of tensile strength and elongation. , 000.
- Examples of the straight chain alkanediol (b) having 4 to 6 carbon atoms in the present invention include 1,4-butanediol, 1,5-pentanediol, and 1,6-hexanediol. Folding resistance and tensile strength From this viewpoint, 1,4-butanediol and 1,6-hexanediol are preferable.
- (B) may be used individually by 1 type, or may use 2 or more types together.
- the monool (c) includes aliphatic monools having 1 to 8 carbon atoms [linear monool (methanol, ethanol, propanol, butanol, pentanol, hexanol, octanol, etc.) and monool having a branched chain (isopropyl Alcohol, neopentyl alcohol, 3-methyl-pentanol and 2-ethylhexanol)]; monools having a cyclic group having 6 to 10 carbon atoms [alicyclic group-containing monools (cyclohexanol etc.) and carbon number 7 To 12 aromatic ring-containing monools (eg, benzyl alcohol and naphthylethanol); and a mixture of two or more of these.
- linear monool methanol, ethanol, propanol, butanol, pentanol, hexanol, octanol, etc.
- high molecular monools such as polyester monool, polyether monool, and polyether ester monool, can also be used as monool (c).
- monool (c) preferred are aliphatic monools having 6 to 10 carbon atoms and monools containing aromatic rings having 7 to 12 carbon atoms.
- diamine having 6 to 10 carbon atoms (d) examples include alicyclic diamines having 6 to 10 carbon atoms (4,4′-diamino-3,3′-dimethyldicyclohexylmethane, 4,4′-diaminodicyclohexylmethane, diamino Cyclohexane and isophorone diamine); aliphatic diamines having 6 to 10 carbon atoms (hexamethylenediamine, etc.); aromatic aliphatic diamines having 8 to 10 carbon atoms (such as xylylenediamine) and mixtures of two or more thereof. . Of these, alicyclic diamines and aliphatic diamines are preferred, and isophorone diamine and hexamethylene diamine are particularly preferred.
- organic diisocyanate (e) examples include the following.
- aliphatic diisocyanates and alicyclic diisocyanates are preferable from the viewpoint of weather resistance, and HDI, IPDI and hydrogenated MDI are more preferable.
- (D) may be used individually by 1 type, or may use 2 or more types together.
- the ratio of the weight of (b) to the total weight of (a), (b), (c), (d) and (e) is usually 0.4 to 1.0% by weight.
- the melt viscosity at 190 ° C. of the thermoplastic urethane urea resin (U) is preferably 300 to 1,000 Pa ⁇ s, more preferably 300 to 700 Pa ⁇ s, from the viewpoint of the meltability of the thermoplastic urethane urea resin (U). It is.
- the melt viscosity in this invention is measured by the method as described in an Example.
- the volume average particle size of the thermoplastic urethane urea resin (U) in the present invention is preferably 10 to 500 ⁇ m, more preferably 70 to 300 ⁇ m. Further, the thermoplastic urethane urea resin (U) may be spherical or non-spherical. In addition, the volume average particle diameter in this invention is measured by the method as described in an Example.
- the storage elastic modulus G ′ 130 at 130 ° C. of the thermoplastic urethane urea resin (U) is preferably 0.2 to 10 MPa, more preferably 0.5 to 2 MPa from the viewpoint of heat resistance and meltability of (U). It is. Incidentally, the storage modulus G '130 of the present invention is measured by a method described in Examples.
- the Mn of the thermoplastic urethane urea resin (U) is preferably 10,000 to 40,000, more preferably 20,000 to 30,000. Mn of the thermoplastic urethane urea resin (U) in the present invention is measured by the method described in Examples.
- thermoplastic urethane urea resin (U) examples include the following methods. (1) A mixture of a polymeric diol (a), a linear alkanediol (b) and a monool (c) and an organic diisocyanate (e) in advance in the presence or absence of an organic solvent, and a hydroxyl group in the mixture The urethane dipolymer (Up) having an isocyanate group at the terminal obtained is reacted with water so that the molar ratio of the isocyanate group of the organic diisocyanate (e) is 1: 1.2 to 1: 4.0. A method in which an elongation reaction is carried out with diamine (d) in the presence of a dispersion stabilizer.
- the low molecular diamine may be a blocked linear aliphatic diamine (for example, a ketimine compound).
- Examples of the organic solvent used for the production of the thermoplastic urethane urea resin (U) include ketones having 3 to 9 carbon atoms (acetone, methyl ethyl ketone, methyl isobutyl ketone, diethyl ketone, etc.), ethers having 4 to 8 carbon atoms (tetrahydrofuran, etc.), and the like. Examples thereof include esters having 3 to 6 carbon atoms (such as methyl acetate and ethyl acetate).
- An organic solvent may be used individually by 1 type, or may use 2 or more types together.
- thermoplastic urethane urea resin (U) examples include water-soluble polymers (methylcellulose, polyvinyl alcohol, polyethylene glycol, polyacrylates, polyvinylpyrrolidone, and copolymers of diisobutylene and maleic acid. Na salt, etc.), inorganic powders (calcium carbonate powder, calcium phosphate powder, hydroxyapatite powder, silica powder, etc.), surfactants (sodium dodecylbenzenesulfonate, sodium lauryl sulfate, etc.) and the like.
- a dispersion stabilizer may be used individually by 1 type, or may use 2 or more types together.
- the reaction temperature at the time of producing the urethane prepolymer (Up) may be the same as that usually employed for urethanization, and is usually 20 ° C. to 100 ° C. when an organic solvent is used. When not used, it is usually 20 ° C to 140 ° C, preferably 80 ° C to 130 ° C.
- a catalyst usually used for polyurethane can be used as necessary to accelerate the reaction. Examples of the catalyst include amine-based catalysts (such as triethylamine, N-ethylmorpholine, and triethylenediamine), tin-based catalysts (such as trimethyltin laurate, dibutyltin dilaurate, and dibutyltin malate).
- thermoplastic urethane urea resin (U) As a method of making the thermoplastic urethane urea resin (U) into a powder form, after obtaining a dispersion in which (U) is dispersed in water or a mixture of water and an organic solvent, a method of removing the dispersion medium, Or the method of obtaining and pulverizing pellet-shaped (U) is mentioned.
- thermoplastic urethane urea resin (U) as a dispersion is not particularly limited.
- the method (1) in the method for producing the urethane urea resin (U), International Publication No. 2011/070784 and International Publication The method of 2013/2013747 is mentioned.
- the emulsifier / disperser used for the production of the dispersion (U) is not particularly limited as long as it is generally commercially available as an emulsifier or a disperser.
- a homogenizer manufactured by IKA
- Polytron Kinematica
- TK auto homomixer manufactured by Primix Co., Ltd.
- Ebara Milder manufactured by Ebara Seisakusho Co., Ltd.
- TK Fillmix TK Pipeline Homo Mixer (manufactured by Primix Co., Ltd.), colloid mill (Shinko Pantech) Slasher, trigonal wet pulverizer (Nihon Coke Kogyo Co., Ltd.), Captron (Eurotech Co., Ltd.), fine flow mill (Pacific Kiko Co., Ltd.), etc., microfluidizer (Mizuho Kogyo Co., Ltd.) ), Nanomizer (Nanom
- thermoplastic urethane urea resin (U) As a method for producing the bulk or pellet-shaped thermoplastic urethane urea resin (U), for example, a batch type kneader such as a kneader and a screw type extruder with a side feeder attached can be used. Subsequently, it cools with liquid nitrogen etc. and grind
- the powdery thermoplastic urethane urea resin composition (P) in the present invention contains a thermoplastic urethane urea resin (U) and an additive.
- additives include inorganic fillers, pigments, plasticizers, mold release agents, stabilizers, and anti-blocking agents (powder flowability improvers).
- An additive may be used individually by 1 type, or may use 2 or more types together.
- Inorganic fillers include kaolin, talc, silica, titanium oxide, calcium carbonate, bentonite, mica, sericite, glass flake, glass fiber, graphite, magnesium hydroxide, aluminum hydroxide, antimony trioxide, barium sulfate, zinc borate , Alumina, magnesia, wollastonite, zonotlite, whisker, metal powder and the like.
- kaolin, talc, silica, titanium oxide and calcium carbonate are preferable from the viewpoint of promoting crystallization of the thermoplastic resin, and kaolin and talc are more preferable.
- the volume average particle diameter of the inorganic filler is preferably 0.1 to 30 ⁇ m, more preferably 1 to 20 ⁇ m, and particularly preferably 5 to 10 ⁇ m from the viewpoint of dispersibility in the thermoplastic resin.
- the addition amount of the inorganic filler is preferably 0 to 40% by weight, more preferably 1 to 20% by weight, based on the weight of the thermoplastic urethane urea resin (U).
- organic pigments include insoluble or soluble azo pigments, copper phthalocyanine pigments, quinacridone pigments, and inorganic pigments include chromates, ferrocyan compounds, metal oxides (titanium oxide, iron oxide, zinc oxide). And aluminum oxide), metal salts [sulfates (such as barium sulfate), silicates (such as calcium silicate and magnesium silicate), carbonates (such as calcium carbonate and magnesium carbonate), and phosphates (such as calcium phosphate and magnesium phosphate) ], Metal powder (aluminum powder, iron powder, nickel powder, copper powder, etc.), carbon black and the like.
- the average particle size of the pigment is not particularly limited, but is usually 0.2 to 5.0 ⁇ m, preferably 0.5 to 1 ⁇ m.
- the amount of the pigment added is usually 10% by weight or less, preferably 0.01 to 5% by weight, more preferably 1 to 3% by weight, based on the weight of the thermoplastic urethane urea resin (U).
- Plasticizers include phthalate esters (dibutyl phthalate, dioctyl phthalate, dibutylbenzyl phthalate, diisodecyl phthalate, etc.); aliphatic dibasic acid esters (di-2-ethylhexyl adipate, 2-ethylhexyl sebacate, etc.) ); Trimellitic acid ester (tri-2-ethylhexyl trimellitic acid and trioctyl trimellitic acid); fatty acid ester (such as butyl oleate); aliphatic phosphoric acid ester (trimethyl phosphate, triethyl phosphate, tributyl phosphate, tri- 2-ethylhexyl phosphate, tributoxy phosphate, etc.); aromatic phosphate ester [triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl
- a known release agent can be used, and a fluorine compound type release agent [tripperfluoroalkyl phosphate (carbon number: 8 to 20) ester (triperfluorooctyl phosphate, triperfluorododecyl phosphate, etc.) ]
- Silicone compound mold release agents dimethylpolysiloxane, amino-modified dimethylpolysiloxane, carboxyl-modified dimethylpolysiloxane, etc.
- Fatty acid ester-type mold release agents [mono- or polyhydric alcohol esters of fatty acids having 10 to 24 carbon atoms (butyl) Stearates, hydrogenated castor oil, ethylene glycol monostearate, etc.]]
- aliphatic acid amide type release agents monoo- or bisamides of fatty acids having 8 to 24 carbon atoms (oleic acid amide, palmitic acid amide, stearic acid amide and ethylenediamine)
- Stabilizers include normal UV absorbers and antioxidants used in slush molding materials, as well as carbon-carbon double bonds (such as ethylene bonds that may have a substituent) in the molecule (however, aromatic And compounds having a carbon-carbon triple bond (acetylene bond which may have a substituent) or the like can be used.
- ultraviolet absorbers examples include benzophenone series [2,4-dihydroxybenzophenone and 2-hydroxy-4-methoxybenzophenone etc.]; benzotriazole series [2- (2′-hydroxy-5′-methylphenyl) benzotriazole etc.]; Salicylic acid type [phenyl salicylate and the like]; hindered amine type [bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate and the like] and the like.
- Antioxidants include phenol-based [2,6-di-t-butyl-p-cresol and butylated hydroxyanisole, etc.]; bisphenol-based [2,2′-methylenebis (4-methyl-6-t-butylphenol) Etc.]; phosphorus-based [triphenyl phosphite and diphenylisodecyl phosphite etc.] and the like.
- Examples of the compound having a carbon-carbon double bond or carbon-carbon triple bond in the molecule include (meth) acrylic acid and a divalent to 10-valent polyhydric alcohol (2- to 10-valent polyhydric alcohol, the same shall apply hereinafter).
- an ester of (meth) acrylic acid and a polyhydric alcohol is preferable, and trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate and more preferably Dipentaerythritol penta (meth) acrylate.
- the addition amount of the stabilizer is preferably 0 to 20% by weight, more preferably 1 to 15% by weight, based on the weight of the thermoplastic urethane urea resin (U).
- the anti-blocking agent (powder fluidity improver), known inorganic anti-blocking agents and organic anti-blocking agents can be used.
- the inorganic blocking inhibitor include silica, talc, titanium oxide and calcium carbonate.
- the organic blocking inhibitor include thermosetting resins having a particle size of 10 ⁇ m or less (thermosetting polyurethane resin, guanamine-based resin, epoxy resin, etc.) and thermoplastic resins having a particle size of 10 ⁇ m or less [thermoplastic polyurethane urea resin and poly ( Meth) acrylate resin etc.].
- the addition amount of the antiblocking agent (fluidity improver) is preferably 0 to 5% by weight, more preferably 0.5 to 1% by weight, based on the weight of the thermoplastic urethane urea resin (U).
- the total addition amount of the additives is preferably 0.01 to 50% by weight, more preferably 1 to 30% by weight, based on the weight of the thermoplastic urethane urea resin (U).
- the additive is any of the raw materials before the production of the thermoplastic urethane urea resin (U), during the production of the urethane prepolymer (Up), after the production of the urethane prepolymer (Up), and after the production of the thermoplastic urethane urea resin (U). Although it may be added in stages, when the additive is a plasticizer, a release agent or an antiblocking agent (powder fluidity improver), it is preferably added after the production of the thermoplastic urethane urea resin (U).
- thermoplastic urethane urea resin (U) and the additive are mixed, so that the additive soaks into (U) and the additive is impregnated in (U).
- a urethane urea resin composition (P) is obtained.
- a known powder mixing device can be used as a mixing device when the thermoplastic urethane urea resin (U) is obtained and then mixed with the additive, and a container rotating type mixer, a fixed container type mixer, and a fluid motion type mixing device. Any machine can be used.
- a high-speed flow type mixer a double-shaft paddle type mixer, a high-speed shear mixer [Hensiel mixer (registered trademark), etc.], a low-speed mixer (planetary mixer, etc.), and a conical screw mixer [Nauta mixer (registered trademark, omitted below), etc.] are preferable, and among these, a double-shaft paddle type mixer, a low speed mixing device (planetary mixer, etc.) and a conical screw mixer (Nauta mixer, etc.) It is.
- the tensile strength at 25 ° C. of the molded film of the powdered thermoplastic urethane urea resin composition (P) in the present invention is usually 8.0 MPa or more, preferably 9.0 MPa or more. If the tensile strength is 8.0 MPa or more, no tearing or the like of the skin occurs during the handling of the skin. In addition, the tensile strength in this invention is measured by the method as described in an Example.
- the storage elastic modulus G ′ 130 after melting the powdered thermoplastic urethane urea resin composition (P) at 200 ° C. and then cooling to 130 ° C. at a cooling rate of 35 ° C./min for 1 hour at 130 ° C. is usually 0.00. 1 to 5.0 MPa, preferably 0.2 to 1.0 MPa. If the storage elastic modulus G ′ 130 at 130 ° C. is 0.1 MPa or more, the heat resistance is good, and if it is 5.0 MPa or less, the low-temperature meltability of the thermoplastic urethane urea resin composition (P) is good. It is. Incidentally, the storage modulus G '130 of the present invention is measured by a method described in Examples.
- the storage elastic modulus G ′ 50 in the formula (1) is the storage elastic modulus G ′ at 50 ° C. when (P) is melted at 200 ° C. and then cooled to 40 ° C. at a cooling rate of 80 ° C./min.
- G ′ 23 is a storage elastic modulus G ′ after melting (P) at 200 ° C. and then cooling to 23 ° C. at 35 ° C./min and after 1 hour at 23 ° C.
- the storage elastic modulus G '50 and G' 23 of the present invention is measured by a method described in Examples.
- the powdery thermoplastic urethane urea resin composition (P) in the present invention is particularly useful as a material for producing a resin molded product such as a skin by a slush molding method.
- a slush molding method the box containing the powdered thermoplastic urethane urea resin composition (P) in the present invention and a heated mold are vibrated and rotated together, the powder is melted and fluidized in the mold, and after cooling, The method of solidifying and manufacturing an epidermis can be mentioned.
- the mold temperature is preferably 200 to 300 ° C, more preferably 200 to 250 ° C.
- the skin thickness formed with the powdery thermoplastic urethane urea resin composition (P) is preferably 0.3 to 1.5 mm.
- the powdery thermoplastic urethane urea resin composition (P) can be molded in a relatively low temperature region, and the molding temperature can be 200 to 250 ° C.
- the molded skin can be made into a resin molded product by setting the surface to be in contact with the foaming mold, pouring urethane foam, and forming a foamed layer of 5 mm to 15 mm on the back surface.
- the resin molded product molded with the powdery thermoplastic urethane urea resin composition (P) is suitably used for automobile interior materials such as instrument panels and door trims.
- thermoplastic urethane urea resin (U-1) In a reaction vessel equipped with a thermometer, a stirrer and a nitrogen blowing tube, polybutylene having a Mn of 2300 polyethylene isophthalate as the polyester polyol (a1) and 282.9 parts of polyethylene isophthalate and a Mn of 1,000 as the polyester polyol (a2) Charge 424.4 parts of adipate, 9.34 parts of benzyl alcohol as monool (c) and 5.88 parts of 1,4-butanediol as linear alkanediol (b), and after purging with nitrogen, stirring It was heated to 110 ° C. for melting and cooled to 50 ° C.
- thermoplastic urethane urea resins (U-2) to (U-4) and comparative thermoplastic urethane urea resins (U'-1) to (U'-5) The thermoplastic urethane urea resins (U-2) to (U-4) and the comparative thermoplastic urethane urea resin (U′-) were the same as in Example 1 except that the raw materials used were changed to those shown in Table 1. 1) to (U′-5) were obtained. In Comparative Production Example 2, no linear alkanediol (b) was used.
- melt viscosity at 190 ° C. The temperature was raised at the same speed under the following conditions, and the melt viscosity at 190 ° C. of the thermoplastic urethane urea resin (U) was measured.
- thermoplastic urethane urea resin composition (P-1) In Nauta mixer, 100 parts of thermoplastic urethane urea resin (U-1), 12 parts of polyethylene glycol dibenzoate as a plasticizer [manufactured by Sanyo Chemical Industries, Ltd .; Sunflex EB-300], as stabilizer Dipentaerythritol pentaacrylate of a compound having a carbon-carbon double bond in the molecule [manufactured by Sanyo Chemical Industries, Ltd .; Neomer DA-600] and bis (1,2,2) as an ultraviolet absorber , 6,6-pentamethyl-4-piperidyl) sebacate and methyl 1,2,2,6,6-pentamethyl-4-piperidylsebacate (mixture) [trade name: TINUVIN 765, manufactured by BASF Japan Ltd.] 3 parts and 1 part of carbon black as a pigment were added and impregnated at 70 ° C.
- thermoplastic urethane urea resin composition P-1).
- thermoplastic urethane urea resin compositions (P-2) to (P-4) and comparative thermoplastic urethane urea resin compositions (P'-1) to (P'-5) The thermoplastic urethane urea resin compositions (P-2) to (P-4) and comparative examples were the same as in Example 1 except that the thermoplastic urethane urea resin (U-1) was replaced with the one shown in Table 2.
- the thermoplastic urethane urea resin compositions (P′-1) to (P′-5) were obtained.
- thermoplastic urethane urea resin composition Filled with a thermoplastic urethane urea resin composition in a Ni electric mold with a grain pattern preheated to 210 ° C. and held for 10 seconds, the excess thermoplastic urethane urea resin composition was discharged, and the mold was cooled with water for 60 seconds. Thus, a molded skin having a thickness of 1.0 mm was produced. A molded skin having a thickness of 0.5 mm was prepared in the same manner as described above except that the holding time after filling was 6 seconds.
- ⁇ Backside meltability> The center part of the back surface of the molded skin having a thickness of 0.5 mm and 1.0 mm was visually observed, and the meltability was evaluated according to the following criteria. 5: Uniform and glossy. 4: There is a partially unmelted powder, but it is glossy. 3: There are irregularities on the entire back surface and there is no gloss. There are no pinholes penetrating the surface. 2: There are irregularities in the form of powder on the entire back surface, and there are pinholes penetrating the surface. 1: The powder does not melt and does not become a molded product.
- ⁇ Heat heat aging test tear strength> A molded skin having a thickness of 1.0 mm was left for 400 hours in a thermo-hygrostat set at a temperature of 80 ° C. and a humidity of 95% RH, and then the tear strength of the skin was measured according to JIS K 6252: 2007. And compared with the initial strength. The tear strength was measured by punching three JIS K 6252: 2007 no-cut angle molds, and adopting the minimum thickness at five locations near the cut portion. This was attached to an autograph in an atmosphere at 25 ° C., pulled at a speed of 200 mm / min, and the tear strength was measured.
- ⁇ Folding crease angle 1.5 minutes after skin removal> A molded skin having a thickness of 0.5 mm and 1.0 mm is cut into a size of 4 cm ⁇ 2.5 cm, and after 1.5 minutes after demolding, the sample is folded in half, and a load of 700 g ⁇ f is applied for 30 seconds. The angle at which the sample was bent was measured 10 minutes after releasing the load.
- the molded articles of Examples 1 to 4 were found to be useful as materials for automobile interiors because of excellent tensile strength and no occurrence of creases.
- the resin molded product for automobile interior materials formed by slush molding the powdered thermoplastic urethane urea resin composition (P) of the present invention is suitably used as the skin of automobile interior materials (instrument panels, door trims, etc.).
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Abstract
Description
スラッシュ成形材料としては、主に軟質のポリ塩化ビニル粉末が使用されていたが、近年ポリウレタン樹脂も使用されている(例えば特許文献1参照)。
しかし、自動車内装材のインストルメンタルパネル用の表皮は、コストダウンの観点から表皮の薄膜化が要望されており、薄膜化の際には通常の表皮強度に比べ、高い樹脂強度を満足させる必要ある。しかし、樹脂強度が高い表皮は熱成形後の冷却時の樹脂の弾性発現速度が遅く、表皮脱型時や高意匠性を目的としたリアルステッチ縫製時に表皮が変形し、しわが発生するという問題が起こる。また、樹脂強度が低い樹脂材料は、薄膜時に表皮の裂け等が発生したり、耐熱性が悪化することから薄膜化することができない。
(1)前記高分子ジオール(a)が、炭素数8~12の芳香族ジカルボン酸(f1)とエチレングリコールとを反応させて得られるポリエステルジオール(a1)及び炭素数4~15の脂肪族ジカルボン酸(f2)と炭素数2~6の脂肪族ジオール(g)とを反応させて得られるポリエステルジオール(a2)を含有する;
(2)前記(a)、前記(b)、前記(c)、前記(d)及び前記(e)の合計重量に対する前記(b)の重量の割合が0.4~1.0重量%である;
(3)前記(P)の成形皮膜の25℃での引張強度が8.0MPa以上である;
(4)前記(P)を200℃で溶融後に冷却速度35℃/分で130℃まで冷却して130℃で1時間経過後の130℃での貯蔵弾性率G’130が0.1~5.0MPaである;
(5)数式(1)で表される貯蔵弾性率G’の比率が50%以上である。
貯蔵弾性率G’の比率=貯蔵弾性率G’50÷貯蔵弾性率G’23×100 (1)
[式中、貯蔵弾性率G’50は(P)を200℃で溶融後に冷却速度80℃/分で40℃まで冷却したときの50℃での貯蔵弾性率G’であり、貯蔵弾性率G’23は(P)を200℃で溶融後に35℃/分で23℃まで冷却して23℃で1時間経過後の貯蔵弾性率G’である。]
尚、本発明におけるジオールのMnはJIS K 1557-1(プラスチック-ポリウレタン原料ポリオール試験方法-第1部:水酸基価の求め方)に準拠して測定されるジオールの水酸基価から算出される値である。
(i)炭素数(NCO基中の炭素を除く、以下同様)2~18の脂肪族ジイソシアネート[エチレンジイソシアネート、テトラメチレンジイソシアネート、ヘキサメチレンジイソシアネート(以下、HDIと略記)、ドデカメチレンジイソシアネート、2,2,4-トリメチルヘキサメチレンジイソシアネート、リジンジイソシアネート、2,6-ジイソシアナトメチルカプロエート、ビス(2-イソシアナトエチル)フマレート、ビス(2-イソシアナトエチル)カーボネート及び2-イソシアナトエチル-2,6-ジイソシアナトヘキサノエート等];
(ii)炭素数4~15の脂環式ジイソシアネート[イソホロンジイソシアネート(以下、IPDIと略記)、ジシクロヘキシルメタン-4,4’-ジイソシアネート(以下、水添MDIと略記)、シクロヘキシレンジイソシアネート、メチルシクロヘキシレンジイソシアネート及びビス(2-イソシアナトエチル)-4-シクロへキセン等];
(iii)炭素数8~15の芳香脂肪族ジイソシアネート[m-又はp-キシリレンジイソシアネート、α,α,α’,α’-テトラメチルキシリレンジイソシアネート等];
(iv)芳香族ジイソシアネート[1,3-又は1,4-フェニレンジイソシアネート、2,4-又は2,6-トリレンジイソシアネート(以下、TDIと略記)、粗製TDI、2,4’-又は4,4’-ジフェニルメタンジイソシアネート(以下、MDIと略記)、4,4’-ジイソシアナトビフェニル、3,3’-ジメチル-4,4’-ジイソシアナトビフェニル、3,3’-ジメチル-4,4’-ジイソシアナトジフェニルメタン、粗製MDI及び1,5-ナフチレンジイソシアネート等];
(v)これらのジイソシアネートの変性物(カーボジイミド基、ウレトジオン基、ウレトイミン基又はウレア基等を有するジイソシアネート変性物)。
これらの内で耐候性の観点から好ましいのは脂肪族ジイソシアネート及び脂環式ジイソシアネートであり、更に好ましいのはHDI、IPDI及び水添MDIである。
(d)は1種を単独で用いても2種以上を併用してもよい。
(1)有機溶媒の存在下又は非存在下であらかじめ高分子ジオール(a)と直鎖アルカンジオール(b)とモノオール(c)の混合物と有機ジイソシアネート(e)を、上記混合物中の水酸基と有機ジイソシアネート(e)のイソシアネート基のモル比が、1:1.2~1:4.0となるように反応させ、得られた末端にイソシアネート基を有するウレタンプレポリマー(Up)を、水及び分散安定剤存在下で、ジアミン(d)で伸長反応させる方法。尚、低分子ジアミンはブロックされた直鎖脂肪族ジアミン(例えばケチミン化合物)等を使用することができる。
(2)上記ウレタンプレポリマー(Up)を、非極性有機溶媒及び分散安定剤存在下で、ジアミン(d)で伸長反応させる方法。
(3)高分子ジオール(a)、直鎖アルカンジオール(b)、モノオール(c)、ジアミン(d)及び有機ジイソシアネート(e)をワンショットで反応させる方法。
上記ウレタン化反応において、反応を促進するために必要によりポリウレタンに通常用いられる触媒を使用することができる。触媒としては、例えばアミン系触媒(トリエチルアミン、N-エチルモルホリン及びトリエチレンジアミン等)、錫系触媒(トリメチルチンラウレート、ジブチルチンジラウレート及びジブチルチンマレート等)等が挙げられる。
無機フィラーの添加量は、熱可塑性ウレタンウレア樹脂(U)の重量に対して、0~40重量%が好ましく、1~20重量%が更に好ましい。
顔料の添加量は、熱可塑性ウレタンウレア樹脂(U)の重量を基準として、通常10重量%以下、好ましくは0.01~5重量%、更に好ましくは1~3重量%である。
可塑剤の添加量は、熱可塑性ウレタンウレア樹脂(U)の重量を基準として、好ましくは0~50重量%、更に好ましくは5~20重量%である。
離型剤の添加量は、熱可塑性ウレタンウレア樹脂(U)の重量を基準として、好ましくは0~1重量%、更に好ましくは0.1~0.5重量%である。
安定剤の添加量は、熱可塑性ウレタンウレア樹脂(U)の重量を基準として、好ましくは0~20重量%、更に好ましくは1~15重量%である。
ブロッキング防止剤(流動性向上剤)の添加量は、熱可塑性ウレタンウレア樹脂(U)の重量に基づいて、好ましくは0~5重量%、更に好ましくは0.5~1重量%である。
130℃での貯蔵弾性率G’130が0.1MPa以上であれば、耐熱性が良好であり、5.0MPa以下であれば、熱可塑性ウレタンウレア樹脂組成物(P)の低温溶融性が良好である。尚、本発明における貯蔵弾性率G’130は、実施例に記載の方法で測定される。
貯蔵弾性率G’の比率=貯蔵弾性率G’50÷貯蔵弾性率G’23×100 (1)
尚、本発明における貯蔵弾性率G’50及びG’23は、実施例に記載の方法で測定される。
金型温度は好ましくは200~300℃、更に好ましくは200~250℃である。
[熱可塑性ウレタンウレア樹脂(U-1)の製造]
温度計、撹拌機及び窒素吹込み管を備えた反応容器に、ポリエステルポリオール(a1)としてのMnが2300ポリエチレンイソフタレート282.9部及びポリエステルポリオール(a2)としてのMnが1,000のポリブチレンアジペート424.4部、モノオール(c)としてのベンジルアルコール9.34部並びに直鎖アルカンジオール(b)としての1,4-ブタンジオール5.88部を仕込み、窒素置換した後、撹拌しながら110℃に加熱して溶融させ、50℃まで冷却した。続いて、有機溶媒としてのメチルエチルケトン150.0部及び有機ジイソシアネート(e)としてのヘキサメチレンジイソシアネート132.0部を投入し、90℃で6時間反応させた。次いで、70℃に冷却した後、安定剤としてのイルガノックス1010[チバスペシャリティーケミカルズ(株)社製]1.4部を加え、均一に混合してウレタンプレポリマー(Up-1)の溶液を得た。得られたプレポリマー溶液のイソシアネート基含有量は、1.63%であった。続いて、反応容器に、分散安定剤としてのサンスパールPS-8[三洋化成工業(株)製]5.9部を水152部に溶解した水溶液157.9部と有機溶媒としてのメチルエチルケトン37.1部を加えて20℃で均一に撹拌後、ウルトラディスパーサー[ヤマト科学(株)製]を用いて周速23m/s(回転数:10,000rpm)の攪拌下にジアミン(d)としてのヘキサメチレンジアミン1.7部を加え1分間混合した。続いて、75℃に温調したプレポリマー(Up-1)の溶液103.3部を投入し、周速23m/sで2分間混合し後、混合物を温度計、撹拌機及び窒素吹込み管を備えた反応容器に移し、窒素置換し、撹拌しながら50℃で10時間反応させた。反応終了後、濾別及び乾燥を行い、熱可塑性ウレタンウレア樹脂(U-1)を得た。
[熱可塑性ウレタンウレア樹脂(U-2)~(U-4)及び比較用の熱可塑性ウレタンウレア樹脂(U’-1)~(U’-5)の製造]
仕込み原料を表1に記載のものに代える以外は実施例1と同様にして、熱可塑性ウレタンウレア樹脂(U-2)~(U-4)及び比較用の熱可塑性ウレタンウレア樹脂(U’-1)~(U’-5)を得た。尚、比較製造例2では直鎖アルカンジオール(b)を使用しなかった。
以下の条件で等速昇温し、熱可塑性ウレタンウレア樹脂(U)の190℃での溶融粘度を測定した。
・装置:フローテスターCFT-500[島津(株)製]
・荷重:5kg・f
・ダイ:穴径0.5mm、長さ1.0mm
・昇温速度:5℃/分
熱可塑性ウレタンウレア樹脂(U)のMnは、ゲルパーミエーションクロマトグラフィーを用いて以下の条件で測定した。
・装置:「HLC-8120」[東ソー(株)製]
・カラム:「TSK GEL GMH6」2本[東ソー(株)製]
・測定温度:40℃
・試料溶液:0.25重量%のテトラヒドロフラン溶液
・溶液注入量:100μl
・検出装置:屈折率検出器
・基準物質:標準ポリスチレン(TSKstandard POLYSTYRENE)12点(分子量 500、1,050、2,800、5,970、9,100、18,100、37,900、96,400、190,000、355,000、1,090,000、2,890,000)[東ソー(株)製]
尚、Mnの測定には、試料をテトラヒドロフランに溶解し、不溶解分をグラスフィルターでろ別したものを試料溶液として用いた。
レーザー回折式粒子径分布測定装置[日機装(株)製「Microtrac MT3000II」]を用いて測定し、得られた相対累積粒径分布曲線において累積量が50%のときの粒径(d50)を体積平均粒径とした。
[熱可塑性ウレタンウレア樹脂組成物(P-1)の製造]
ナウタミキサ内に、熱可塑性ウレタンウレア樹脂(U-1)100部、可塑剤としてのポリエチレングリコールジ安息香酸エステル[三洋化成工業(株)社製;サンフレックス EB-300]12部、安定剤としての分子中に炭素-炭素二重結合を有する化合物のジペンタエリスリトールペンタアクリレート[三洋化成工業(株)社製;ネオマー DA-600]1.0部及び紫外線吸収剤としてのビス(1,2,2,6,6-ペンタメチル-4-ピペリジル)セバケート及びメチル1,2,2,6,6-ペンタメチル-4-ピペリジルセバケート(混合物)[商品名:TINUVIN 765、BASFジャパン(株)製]0.3部並びに顔料としてのカーボンブラック1部を投入し、70℃で4時間含浸させた。続いて、内添離型剤としてのジメチルポリシロキサン[日本ユニカー(株)製;L45-1000]0.06部を投入し1時間混合した後室温まで冷却した。最後に、ブロッキング防止剤としての架橋ポリメチルメタクリレート[ガンツ化成(株);ガンツパールPM-030S]0.5部を投入混合することで熱可塑性ウレタンウレア樹脂組成物(P-1)を得た。
[熱可塑性ウレタンウレア樹脂組成物(P-2)~(P-4)及び比較用の熱可塑性ウレタンウレア樹脂組成物(P’-1)~(P’-5)の製造]
熱可塑性ウレタンウレア樹脂(U-1)を表2に記載のものに代える以外は実施例1と同様にして、熱可塑性ウレタンウレア樹脂組成物(P-2)~(P-4)及び比較用の熱可塑性ウレタンウレア樹脂組成物(P’-1)~(P’-5)を得た。
各条件での貯蔵弾性率G’を、下記の条件で測定した。
・装置:動的粘弾性測定装置「RDS-2」(Rheometric Scientific社製)
・周波数:1Hz
(1)130℃での貯蔵弾性率G’130の測定方法
測定試料を測定装置の冶具(冶具の直径:8mm)にセットした後、200℃まで昇温して200℃で1分間溶融させて冶具に密着させ、冷却速度35℃/分で130℃まで冷却して測定を開始し、130℃で1時間経過後の貯蔵弾性率G’を読み取った。
測定試料を測定装置の冶具(冶具の直径:8mm)にセットした後、200℃まで昇温して200℃で1分間溶融させて冶具に密着させた後、測定を開始して、冷却速度80℃/分で40℃まで冷却して温度に対して貯蔵弾性率G’がプロットされた曲線グラフを得て、このグラフから50℃における貯蔵弾性率G’を読み取った。
測定試料を測定装置の冶具(冶具の直径:8mm)にセットした後、200℃まで昇温して200℃で1分間溶融させて冶具に密着させ、冷却速度35℃/分で23℃まで冷却して測定を開始し、23℃で1時間経過後の貯蔵弾性率G’を読み取った。
[成形品としての表皮の作製及び評価]
製造例5~8及び比較製造例6~10で得られた熱可塑性ウレタンウレア樹脂組成物(P-1)~(P-4)及び(P’-1)~(P’-5)を用いて、以下の方法でスラッシュ成形を行い表皮を得た後、以下の方法で各物性について測定又は評価した。結果を表3に示す。
予め210℃に加熱されたしぼ模様の入ったNi電鋳型に熱可塑性ウレタンウレア樹脂組成物を充填し10秒間保持した後、余分な熱可塑性ウレタンウレア樹脂組成物を排出し、型を60秒間水冷して厚さ1.0mmの成形表皮を作製した。また、充填後の保持時間を6秒にする以外は、前記と同様にして厚さ0.5mmの成形表皮を作製した。
測定はJIS K 6251:2010に準じて行った。即ち、厚さ0.5mm及び1.0mmの成形表皮からJIS K 6251:2010の引張試験片ダンベル1号形を3枚打ち抜き、その中心に40mm間隔で標線を引いた。板厚は標線間5カ所の最小値を採用した。これを25℃雰囲気下にてオートグラフに取り付け、200mm/分の速さで引っ張り、引張強さ及び切断時伸びを測定した。
厚さ0.5mm及び1.0mmの成形表皮裏面中央部を目視で観察し、以下の判定基準で溶融性を評価した。
5:均一で光沢がある。
4:一部未溶融のパウダーが有るが、光沢がある。
3:裏面全面に凹凸があり、光沢はない。表面に貫通するピンホールはない。
2:裏面全面にパウダーの形状の凹凸があり、かつ表面に貫通するピンホールがある。
1:パウダーが溶融せず、成形品にならない。
厚さ1.0mmの成形表皮を、温度80℃湿度95%RHにセットされた恒温恒湿機中に400時間静置した後、表皮の引裂強さをJIS K 6252:2007に準じて測定して、初期強度と比較した。引裂強さの測定は、JIS K 6252:2007の切込みなしアングル型を3枚打ち抜き、板厚は切断部分付近5ヶ所の最小値を採用した。これを25℃雰囲気下にてオートグラフに取り付け、200mm/分の速さで引っ張り、引裂強さを測定した。
厚さ0.5mm及び1.0mmの成形表皮を4cm×2.5cmの大きさに切り取り、脱型後1.5分後にサンプルを半分に折り曲げ、荷重700g・fを30秒間かける。荷重を開放した後10分後にサンプルの折れている角度を測定した。
厚さ1.0mmの成形表皮を、縦60mm、横95mmの大きさに切り、シートの裏面に、コールドカッター(刃の厚み0.3mm)で表面に対しておよそ直角に深さ0.4~0.6mm、長さ60mmの切り目を入れた。成形表皮を離型紙に挟み、離型紙の上から重量95~100g、寸法(縦、横、高さ)が縦100mm×横100mm×厚み1.2mmの鉄板を離型紙が隠れるように載せ、空気中、常圧下130℃で100時間放置した後、上記シートの切り目が融着していないか目視で観察した。
以下の基準で評価した。
○:カッターの切り目が全く融着していない。
△:カッターの切り目が部分的に融着している。
×:カッターの切り目が融着している。
Claims (5)
- 数平均分子量が500~5,000の高分子ジオール(a)、炭素数4~6の直鎖アルカンジオール(b)、モノオール(c)、炭素数6~10のジアミン(d)及び有機ジイソシアネート(e)を反応させて得られる熱可塑性ウレタンウレア樹脂(U)と添加剤とを含有し、
下記(1)~(5)を満たす粉末状熱可塑性ウレタンウレア樹脂組成物(P)を、スラッシュ成形してなる自動車内装材用樹脂成形品:
(1)前記高分子ジオール(a)が、炭素数8~12の芳香族ジカルボン酸(f1)とエチレングリコールとを反応させて得られるポリエステルジオール(a1)及び炭素数4~15の脂肪族ジカルボン酸(f2)と炭素数2~6の脂肪族ジオール(g)とを反応させて得られるポリエステルジオール(a2)を含有する;
(2)前記(a)、前記(b)、前記(c)、前記(d)及び前記(e)の合計重量に対する前記(b)の重量の割合が0.4~1.0重量%である;
(3)前記(P)の成形皮膜の25℃での引張強度が8.0MPa以上である;
(4)前記(P)を200℃で溶融後に冷却速度35℃/分で130℃まで冷却して130℃で1時間経過後の貯蔵弾性率G’130が0.1~5.0MPaである;
(5)数式(1)で表される貯蔵弾性率G’の比率が50%以上である。
貯蔵弾性率G’の比率=貯蔵弾性率G’50÷貯蔵弾性率G’23×100 (1)
[式中、貯蔵弾性率G’50は(P)を200℃で溶融後に冷却速度80℃/分で40℃まで冷却したときの50℃での貯蔵弾性率G’であり、貯蔵弾性率G’23は(P)を200℃で溶融後に35℃/分で23℃まで冷却して23℃で1時間経過後の貯蔵弾性率G’である。] - 前記炭素数4~6の直鎖アルカンジオール(b)が1,4-ブタンジオール及び/又は1,6-ヘキサンジオールである請求項1記載の樹脂成形品。
- 前記ポリエステルジオール(a1)の数平均分子量が1,500~3,000であり、前記ポリエステルジオール(a2)の数平均分子量が800~1,500である請求項1又は2記載の樹脂成形品。
- 前記ポリエステルジオール(a1)と前記ポリエステルジオール(a2)の重量比[(a1):(a2)]が、5:95~30:70である請求項1~3のいずれか記載の樹脂成形品。
- 熱可塑性ウレタンウレア樹脂(U)の190℃での溶融粘度が300~1,000Pa・sである請求項1~4のいずれか記載の樹脂成形品。
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JP2003300428A (ja) * | 2002-04-10 | 2003-10-21 | Sanyo Chem Ind Ltd | エアバッグドア部を有するインストルメントパネル表皮成形用材料 |
JP2007119546A (ja) * | 2005-10-26 | 2007-05-17 | Nippon Polyurethane Ind Co Ltd | 粉末状熱可塑性ポリウレタンウレア樹脂の製造方法 |
JP2007204693A (ja) * | 2006-02-06 | 2007-08-16 | Nippon Polyurethane Ind Co Ltd | 粉末状熱可塑性ポリウレタンウレア樹脂の製造方法 |
JP2011140644A (ja) * | 2009-12-10 | 2011-07-21 | Sanyo Chem Ind Ltd | スラッシュ成形用ウレタン樹脂粒子 |
JP2013241574A (ja) * | 2012-04-25 | 2013-12-05 | Sanyo Chem Ind Ltd | ウレタン(ウレア)樹脂粒子組成物 |
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JP6026460B2 (ja) | 2016-11-16 |
CN106232664B (zh) | 2019-01-15 |
CA2944988C (en) | 2018-02-13 |
US20170044300A1 (en) | 2017-02-16 |
US9745404B2 (en) | 2017-08-29 |
JP2015209467A (ja) | 2015-11-24 |
CN106232664A (zh) | 2016-12-14 |
CA2944988A1 (en) | 2015-10-29 |
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