WO2019116691A1 - Composition de résine de polyester insaturé, article moulé contenant un produit durci de celle-ci, et réflecteur de lampe comprenant ledit article moulé - Google Patents

Composition de résine de polyester insaturé, article moulé contenant un produit durci de celle-ci, et réflecteur de lampe comprenant ledit article moulé Download PDF

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Publication number
WO2019116691A1
WO2019116691A1 PCT/JP2018/037262 JP2018037262W WO2019116691A1 WO 2019116691 A1 WO2019116691 A1 WO 2019116691A1 JP 2018037262 W JP2018037262 W JP 2018037262W WO 2019116691 A1 WO2019116691 A1 WO 2019116691A1
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Prior art keywords
unsaturated polyester
polyester resin
resin composition
inorganic filler
mass
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PCT/JP2018/037262
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English (en)
Japanese (ja)
Inventor
審史 田村
正太郎 板見
隆仁 石内
和正 中条
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昭和電工株式会社
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Priority to JP2019558930A priority Critical patent/JPWO2019116691A1/ja
Priority to CN201880065135.2A priority patent/CN111201280A/zh
Publication of WO2019116691A1 publication Critical patent/WO2019116691A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
    • C08F283/01—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to unsaturated polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/06—Unsaturated polyesters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors

Definitions

  • the present invention relates to an unsaturated polyester resin composition, a molded article containing the cured product thereof, and a lamp reflector containing the molded article.
  • the present invention relates to an unsaturated polyester resin composition used in the production of a lamp reflector used for an automobile headlamp and the like, a molded article containing the cured product thereof, and a lamp reflector containing the molded article.
  • An unsaturated polyester resin composition in which a fiber reinforcing material and an inorganic filler are mixed with an unsaturated polyester resin has good resin flowability at the time of molding and a cured product excellent in dimensional accuracy, heat resistance and mechanical strength. It is widely used in the manufacture of office automation equipment, office equipment chassis, automobile headlamp lamp reflectors, etc.
  • the lamp reflector reflects and illuminates the light of the lamp at a certain angle, which may cause deviation of light distribution if the surface smoothness of the reflective layer is not sufficient.
  • an undercoat agent is applied and cured on the surface of a molded article (base material) obtained by molding and curing an unsaturated polyester resin composition to form an undercoat layer, and then an undercoat layer is formed.
  • a metal coating layer (reflection layer) of aluminum, zinc or the like is formed thereon by vapor deposition or the like.
  • it may be considered to increase the thickness of the undercoat layer, but the thickness of the undercoat layer leads to an increase in manufacturing cost.
  • the unsaturated polyester resin composition used for the production of the lamp reflector has a surface which is excellent in resin flowability at the time of molding and gives a cured product excellent in dimensional accuracy, heat resistance and mechanical strength. It is also required to provide a cured product with excellent smoothness.
  • An inorganic filler is generally blended in the unsaturated polyester resin composition from the viewpoint of mechanical strength and cost (Patent Documents 1 and 2).
  • the mechanical strength of the unsaturated polyester resin composition can be improved by increasing the amount of the inorganic filler to be blended, while the resin flowability at the time of molding of the unsaturated polyester resin composition and the surface smoothness of the molded article Sex tends to decline.
  • the present invention has been made to solve the problems as described above, and has a good resin flowability at the time of molding, and a molded article having excellent surface smoothness in addition to dimensional accuracy and mechanical properties. It is an object of the present invention to provide an unsaturated polyester resin composition which gives
  • the present inventors have blended a predetermined amount of inorganic filler in the unsaturated polyester resin composition, and used two types of average particle sizes as the inorganic filler.
  • inorganic fillers By using different inorganic fillers, it has been found that resin flowability at the time of molding is good and that a molded article having excellent surface smoothness can be formed, and the present invention has been completed.
  • the present invention relates to the following [1] to [6].
  • Unsaturated polyester resin composition comprising (a) unsaturated polyester resin, (b) inorganic filler, (c) metal soap, (d) low shrinkage agent, (e) fiber reinforcement and (f) curing agent
  • the inorganic filler (b) is 250 to 600 parts by mass with respect to 100 parts by mass of the unsaturated polyester resin (a),
  • As the inorganic filler (b1) an inorganic filler having an average particle diameter of 0.5 to 5.0 ⁇ m and (b2) an inorganic filler having an average particle diameter of 8.0 to 50.0 ⁇ m
  • an unsaturated polyester resin composition which gives a molded article excellent in surface smoothness in addition to dimensional accuracy and mechanical properties, as well as resin flowability at the time of molding. .
  • One embodiment of the present invention comprises (a) unsaturated polyester resin, (b) inorganic filler, (c) metal soap, (d) low shrinkage agent, (e) fiber reinforcement and (f) curing agent. It is an unsaturated polyester resin composition.
  • (A) unsaturated polyester resin generally contains a condensation product (unsaturated polyester) obtained by the esterification reaction of a polyhydric alcohol with an unsaturated polybasic acid and an optional saturated polybasic acid as a crosslinking agent (“reactivity It is also dissolved in “diluent”.
  • An unsaturated polybasic acid is a polybasic acid having a polymerizable ethylenic double bond
  • a saturated polybasic acid is a polybasic acid having no polymerizable ethylenic double bond.
  • polyester resin handbook (Nikkan Kogyo Shimbun, published in 1988) and "Coating glossary” (coloring materials association ed., 1993) Yearly issue etc.).
  • the polyhydric alcohol used for the synthesis of the unsaturated polyester is not particularly limited, and those known in the technical field of the present invention can be used.
  • polyhydric alcohols include ethylene glycol, propylene glycol, neopentyl glycol, butanediol, diethylene glycol, dipropylene glycol, triethylene glycol, pentanediol, hexanediol, neopentanediol, hydrogenated bisphenol A, bisphenol A, glycerin Etc.
  • propylene glycol, neopentyl glycol, bisphenol A and hydrogenated bisphenol A are preferable from the viewpoints of heat resistance, mechanical strength and resin fluidity at the time of molding. These can be used alone or in combination of two or more.
  • the unsaturated polybasic acid used for the synthesis of the unsaturated polyester is not particularly limited, and those known in the technical field of the present invention can be used.
  • unsaturated polybasic acids include maleic anhydride, fumaric acid, citraconic acid, itaconic acid and the like. These can be used alone or in combination of two or more. Among these, maleic anhydride and fumaric acid are preferable from the viewpoints of heat resistance, mechanical strength, resin fluidity at the time of molding, and the like.
  • the saturated polybasic acid used for the synthesis of the unsaturated polyester is not particularly limited, and known ones can be used.
  • saturated polybasic acids include phthalic anhydride, isophthalic acid, terephthalic acid, succinic acid, adipic acid, sebacic acid, tetrachlorophthalic anhydride, tetrabromophthalic anhydride, endo methylene tetrahydrophthalic anhydride, hetic acid, etc. It can be mentioned. These can be used alone or in combination of two or more.
  • Unsaturated polyester can be synthesized by known methods using raw materials as described above. Although various conditions in this synthesis need to be set appropriately according to the raw materials used and the amount thereof, generally, pressurization or pressure reduction is carried out at a temperature of 140 to 230 ° C. in an inert gas stream such as nitrogen gas. It may be esterified below. In this esterification reaction, an esterification catalyst can be used as needed. Examples of catalysts include known catalysts such as manganese acetate, dibutyltin oxide, stannous oxalate, zinc acetate and cobalt acetate. These can be used alone or in combination of two or more.
  • the weight average molecular weight (Mw) of the unsaturated polyester is not particularly limited, but is preferably 3,000 to 25,000, more preferably 5,000 to 20,000, and still more preferably 7,000 to 18 , 000.
  • “weight average molecular weight” is measured at room temperature (23 ° C.) under the following conditions using gel permeation chromatography (Shodex (registered trademark) GPC-101 manufactured by Showa Denko KK). The value determined using a standard polystyrene calibration curve is meant.
  • the crosslinking agent used for the unsaturated polyester resin is not particularly limited as long as it has an ethylenic double bond that can be polymerized with the unsaturated polyester, and known crosslinking agents in the technical field of the present invention Can be used.
  • the crosslinking agent include styrene monomer, diallyl phthalate monomer, diallyl phthalate prepolymer, methyl methacrylate, triallyl isocyanurate and the like. These can be used alone or in combination of two or more.
  • the compounding amount of the crosslinking agent in the unsaturated polyester resin is not particularly limited, but from the viewpoint of workability, polymerizability, shrinkage of molded articles and freedom in adjusting the amount, the total amount of unsaturated polyester and crosslinking agent On the other hand, it is preferably 25 to 70% by mass, more preferably 30 to 68% by mass, and still more preferably 35 to 65% by mass.
  • the unsaturated polyester resin can also contain a polymerization inhibitor such as hydroquinone, if necessary.
  • the inorganic filler (b) As the inorganic filler (b), those known in the technical field of the present invention can be used.
  • the inorganic filler (b) include calcium carbonate, silica, alumina, aluminum hydroxide, barium sulfate, wollastonite, clay, talc, mica, gypsum, anhydrous silicic acid, glass powder and the like. These can be used alone or in combination of two or more.
  • the true specific gravity of the inorganic filler (b) is preferably 1 to 10 g / cm 3 , more preferably 1.5 to 8 g / cm 3 , and still more preferably 2 to 5 g / cm 3 . If the true specific gravity of the inorganic filler is 1 g / cm 3 or more, the mechanical properties of the molded article are better, and if the true specific gravity of the inorganic filler is 10 g / cm 3 or less, the kneadability is better is there.
  • the shape of the inorganic filler (b) is not particularly limited, and examples thereof include approximately a true sphere, an ellipsoid, a scaly shape, and an amorphous shape.
  • the blending amount of the (b) inorganic filler is 250 to 600 parts by mass, more preferably 300 to 550 parts by mass, and still more preferably 350 to 500 parts by mass with respect to 100 parts by mass of the (a) unsaturated polyester resin. Parts, in particular 350 to 450 parts by weight.
  • the inorganic filler includes (b1) an inorganic filler having an average particle diameter of 0.5 to 5.0 ⁇ m, and (b2) an inorganic filler having an average particle diameter of 8.0 to 50.0 ⁇ m.
  • the "average particle size" of the inorganic filler (b) means a particle size determined according to the following equation from the specific surface area determined by an air permeation method using a constant pressure powder specific surface area measuring device.
  • a constant pressure powder specific surface area measuring device SS-100 manufactured by Shimadzu Corporation can be used.
  • Average particle size [ ⁇ m] (6 ⁇ 10000) / (true specific gravity [g / cm 3 ] ⁇ specific surface area [cm 2 / g])
  • the average particle diameter of (b1) is more preferably 0.7 to 4.0 ⁇ m, still more preferably 0.8 to 3.0 ⁇ m.
  • the average particle diameter of (b2) is more preferably 9.0 to 40.0 ⁇ m, and still more preferably 10.0 to 30.0 ⁇ m. If the average particle diameter of (b1) is 0.5 ⁇ m or more, the viscosity of the unsaturated polyester resin composition is appropriate and good resin fluidity is obtained at the time of molding, and if it is 5.0 ⁇ m or less, the surface of the molded article is smooth. It is possible to improve the quality.
  • the average particle diameter of (b2) is 8.0 ⁇ m or more, the resin flowability at molding and the mechanical strength of the molded product are better, and if it is 50.0 ⁇ m or less, the surface smoothness of the molded product It is possible to keep the sex better.
  • the mass ratio of (b1) to (b2) is 25:75 to 75:25. From the viewpoint of surface smoothness, it is preferably 30:70 to 70:30, and more preferably 40:60 to 60:40.
  • (C) metal soap is a component generally used as a mold release agent in the technical field of the present invention.
  • the metal soap (c) is not particularly limited, and those known in the technical field of the present invention can be used.
  • Examples of (c) metal soaps include calcium stearate, zinc stearate, aluminum stearate, magnesium stearate and the like. These can be used alone or in combination of two or more.
  • the blending amount of the (c) metal soap is preferably 1 to 15 parts by mass with respect to 100 parts by mass of the (a) unsaturated polyester resin. (C) If the compounding quantity of metal soap is 1 mass part or more, the releasability of a molded object will be more favorable. On the other hand, if the blending amount of (c) metal soap is 15 parts by mass or less, it is possible to prevent (c) the metal soap from bleeding on the surface of the molded product, so desired fogging properties and paintability of the undercoat agent Can be obtained.
  • the low-shrinkage agent (d) is not particularly limited, and those known in the technical field of the present invention can be used.
  • the low shrinkage agent include thermoplastic polymers generally used as a low shrinkage agent such as polystyrene, polymethyl methacrylate, polyvinyl acetate, saturated polyester, styrene-butadiene rubber and the like. These can be used alone or in combination of two or more.
  • the blending amount of the (d) low-shrinkage agent is preferably 10 to 40 parts by mass with respect to 100 parts by mass of the (a) unsaturated polyester resin. (D) If the blending amount of the low-shrinkage agent is 10 parts by mass or more, the shrinkage rate of the molded product becomes small, and desired dimensional accuracy can be obtained. On the other hand, if the blending amount of the (d) low shrinkage agent is 40 parts by mass or less, the mechanical properties of the molded article are more favorable.
  • the fiber reinforcing material is a fibrous material having an aspect ratio of 3 or more.
  • the aspect ratio can be measured by the microscopic method described in Japanese Industrial Standard JIS R-8900-1: 2008 "Particle for measuring particle size measuring device".
  • the fiber reinforcing material (e) is not particularly limited, and those known in the technical field of the present invention can be used.
  • Examples of the fiber reinforcement include various organic fibers and inorganic fibers such as glass fibers, pulp, polyethylene terephthalate fibers, vinylon fibers, carbon fibers, aramid fibers, wollastonite and the like. Among them, glass fiber is preferable, and chopped strand glass cut to a fiber length of about 1.5 to 25 mm is more preferable.
  • the compounding amount of the (e) fiber reinforcing material is preferably 70 to 120 parts by mass with respect to 100 parts by mass of the (a) unsaturated polyester resin. (E) If the compounding quantity of a fiber reinforcement is 70 mass parts or more, the mechanical characteristic of a molded object will be more favorable. On the other hand, if the blending amount of (e) fiber reinforcing material is 120 parts by mass or less, (e) the fiber reinforcing material is more uniformly dispersed in the unsaturated polyester resin composition to produce a homogeneous molded article. it can.
  • the curing agent (f) is not particularly limited as long as it is a radical initiator capable of polymerizing an ethylenically unsaturated bond, and those known in the technical field of the present invention can be used.
  • curing agents include t-butyl peroxy octoate, benzoyl peroxide, 1,1-di-t-butyl peroxy-3,3,5-trimethylcyclohexane, t-butyl peroxy isopropyl carbonate And organic peroxides such as t-butylperoxybenzoate, dicumyl peroxide, di-t-butyl peroxide and the like. These can be used alone or in combination of two or more.
  • the compounding amount of the curing agent may be appropriately set according to the raw material to be used, and is not particularly limited.
  • the amount of the curing agent (f) is preferably 1 to 10 parts by mass, more preferably 1 to 8 parts by mass, still more preferably 1 to 5 parts by mass per 100 parts by mass of the unsaturated polyester resin (a). It is a mass part.
  • the unsaturated polyester resin composition of the present invention includes, in addition to the above components, components known in the technical field of the present invention, such as thickeners, pigments, viscosity reducing agents, etc., within the range not to inhibit the effects of the present invention. be able to.
  • metal oxides other than (b) inorganic fillers such as magnesium oxide, magnesium hydroxide, calcium hydroxide, calcium oxide, and an isocyanate compound etc. are mentioned. These can be used alone or in combination of two or more.
  • the unsaturated polyester resin composition can be produced by a method which is usually carried out in the technical field of the present invention, for example, by kneading each component using a kneader or the like.
  • a molded object can be manufactured by shape
  • the molding and curing method is not particularly limited, and methods commonly used in the technical field of the present invention, for example, compression molding, transfer molding, injection molding and the like can be used.
  • the molded article of the unsaturated polyester resin composition is suitable for use as a substrate of a lamp reflector. Since the molded article of the unsaturated polyester resin composition containing the inorganic filler having the above two specific average particle sizes is excellent in surface smoothness, the thickness of the undercoat layer necessary to prevent the deviation of the light distribution Is small. Therefore, it is possible to reduce the manufacturing cost.
  • the lamp reflector generally includes a molded article (base material) of the unsaturated polyester resin composition, an undercoat layer located on the molded article, and a metal reflective layer located on the undercoat layer.
  • FIG. 1a is a cross-sectional view of a lamp with a lamp reflector of one embodiment.
  • FIG. 1b is an enlarged cross-sectional view of the line aa 'of FIG. 1a.
  • the lamp generally comprises a lamp reflector, a light source 4 provided at a predetermined position of the lamp reflector, and a lens 5 provided at the opening of the lamp reflector.
  • the lamp reflector includes a molded body 1 of the unsaturated polyester resin composition, an undercoat layer 2 positioned on the molded body 1, and a metal reflection layer positioned on the undercoat layer 2. And three. In this lamp, the light generated from the light source 4 is reflected by the metal reflection layer 3.
  • the thickness of the undercoat layer 2 can be appropriately set in accordance with the required size of the lamp reflector, but is generally 10 to 50 ⁇ m.
  • the undercoat agent for giving the undercoat layer 2 is not particularly limited, and those known in the technical field of the present invention can be used.
  • This undercoat agent is also called a primer composition, and is generally a resin composition containing a UV curable resin or a thermosetting resin.
  • the UV curable resin and the thermosetting resin include pentaerythritol triacrylate, pentaerythritol tetraacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, dipentaerythritol hexaacrylate, dipentaerythritol pentaacrylate and the like.
  • the undercoat agent may contain a polyester resin such as unsaturated polyester resin, vinyl-modified polyester resin, phenol-modified polyester resin, oil-modified polyester resin, silicone-modified polyester resin, curing agent, solvent and the like.
  • the thickness of the metal reflection layer 3 can be appropriately set in accordance with the required size of the lamp reflector and the like, but is generally 800 to 2,000 ⁇ .
  • the material for providing the metal reflective layer 3 is not particularly limited, and materials known in the technical field of the present invention can be used.
  • Examples of the material of the metal reflective layer 3 include aluminum, silver, zinc, an alloy composed mainly of silver and zinc, and the like.
  • the light source 4 and the lens 5 provided at predetermined positions of the lamp body are not particularly limited, and those known in the technical field of the present invention can be used.
  • a lamp reflector having such a configuration can be manufactured as follows.
  • the unsaturated polyester resin composition is molded and cured to obtain a molded body 1.
  • the molded body 1 can be obtained by molding and curing the unsaturated polyester resin composition into a predetermined shape using a known molding method such as compression molding, transfer molding, injection molding and the like.
  • the release agent is removed if necessary.
  • the removal of the release agent can be carried out by washing treatment, heat treatment, flame treatment or the like.
  • an undercoat agent is applied onto the molded body 1 and cured to form an undercoat layer 2. It does not specifically limit as method to apply
  • well-known methods such as an air spray system and an airless spray system, can be used.
  • the curing method is also not particularly limited, and can be appropriately selected according to the type of undercoat agent.
  • the metal reflective layer 3 is formed on the undercoat layer 2. It does not specifically limit as method to form the metal reflection layer 3 on the undercoat layer 2, For example, well-known methods, such as a vacuum evaporation method, can be used.
  • the light source 4 and the lens 5 are attached to predetermined positions of the lamp body.
  • the method of attaching the light source 4 and the lens 5 is not particularly limited, and can be performed according to a known method.
  • Examples 1 to 13 Each component was charged according to the composition shown in Table 1 and kneaded for 30 minutes at 25 ° C. using a double-arm type kneader to obtain an unsaturated polyester resin composition.
  • the unsaturated polyester resin (a) shown in Tables 1 and 2 contains 30% by mass of a styrene monomer.
  • the unsaturated polyester resin composition was obtained by preparing each component with the composition shown in Table 2 and kneading it for 30 minutes at 25 ° C. using a double-arm type kneader.
  • calcium carbonate (average particle diameter 0.5 ⁇ m, 1.0 ⁇ m, 2.0 ⁇ m, 5.0 ⁇ m, 8.0 ⁇ m, 10.0 ⁇ m, 20.0 ⁇ m, and the like) as the inorganic filler (b) And 8 types of 50.0 ⁇ m, each having a true specific gravity of 2.7 g / cm 3 ), (c) zinc stearate as a metal soap, (d) polystyrene as a low-shrinkage agent (weight average molecular weight 200,000), (e) Chopped strand glass (fiber length 6 mm) was used as a fiber reinforcement, and (f) t-butylperoxybenzoate was used as a curing agent.
  • Molding shrinkage ratio Compression molding of a shrinking disk ( ⁇ 90 mm ⁇ 11 mm) defined in JIS K-6911 5.7 under the conditions of a molding temperature of 160 ° C., a molding pressure of 10 MPa and a molding time of 3 minutes (Techno Marushichi Co., Ltd. Manufactured by using a compression molding machine), and the molding shrinkage ratio is calculated in accordance with JIS K-6911 5.7.

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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)
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Abstract

L'invention concerne une composition de résine de polyester insaturé qui assure une bonne aptitude à l'écoulement de la résine, et permet de produire un article moulé présentant un excellent lissé de surface ainsi qu'une précision dimensionnelle et des propriétés mécaniques. Cette composition de résine de polyester insaturé comprend : une résine de polyester insaturé (a); une charge inorganique (b); un savon métallique (c); un agent de faible retrait (d); un matériau de renforcement de fibre (e), et un agent de durcissement (f). La charge inorganique (b) est de 250 à 600 parties en masse par rapport à 100 parties en masse de la résine de polyester insaturé (a); et la charge inorganique (b) présente une charge inorganique (b1) dont la dimension granulométrique moyenne est de 0,5 à 5,0 µm, et une charge inorganique (b2) dont le diamètre moyen des particules est de 8,0 à 50,0 µm selon un rapport de masse (b1):(b2) égal à 25:75-75:25.
PCT/JP2018/037262 2017-12-11 2018-10-04 Composition de résine de polyester insaturé, article moulé contenant un produit durci de celle-ci, et réflecteur de lampe comprenant ledit article moulé WO2019116691A1 (fr)

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JP2019558930A JPWO2019116691A1 (ja) 2017-12-11 2018-10-04 不飽和ポリエステル樹脂組成物、その硬化物を含む成形体、及び該成形体を含むランプリフレクター
CN201880065135.2A CN111201280A (zh) 2017-12-11 2018-10-04 不饱和聚酯树脂组合物、含有它的固化物的成型体、和含有该成型体的灯光反射器

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JP2017-236705 2017-12-11
JP2017236705 2017-12-11

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WO2019116691A1 true WO2019116691A1 (fr) 2019-06-20

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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JPH08199004A (ja) * 1995-01-20 1996-08-06 Fuji Electric Co Ltd ポリエステルプリミックス成形材料
JPH1135813A (ja) * 1997-07-22 1999-02-09 Hitachi Chem Co Ltd メッキ性に優れた不飽和ポリエステル樹脂組成物及びそれを用いた成形品の製造方法
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WO2022137686A1 (fr) * 2020-12-21 2022-06-30 昭和電工株式会社 Composition de résine de polyester insaturé et objet moulé

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