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Resin composition, molding material, and molded article thereof

A technology of resin composition and inorganic filling material, applied in the field of molding materials and their molded products, and resin compositions, can solve the problems of high compound viscosity, damage to SMC manufacturing adaptability, poor surface smoothness, etc., and achieve surface smoothness. excellent effect

Pending Publication Date: 2022-03-01
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if balls are added, the surface smoothness will be poor and the viscosity of the compound will increase, which will impair the suitability of SMC manufacturing.

Method used

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  • Resin composition, molding material, and molded article thereof
  • Resin composition, molding material, and molded article thereof

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0051] (Manufacture example 1: Manufacture of unsaturated polyester (A-1))

[0052] 3 moles of fumaric acid and 3.15 moles of propylene glycol were charged into a four-necked flask equipped with a thermometer, a stirrer, an inert gas inlet, and a reflux condenser, and a dehydration condensation reaction was performed at 205° C. for 10 hours. Next, styrene was added, and the 60 mass % styrene solution of the unsaturated polyester (A-1) was obtained.

manufacture example 2

[0053] (Manufacturing example 2: Manufacture of glass bulb (E-1))

[0054] Into a four-necked flask equipped with a stirrer, an inert gas inlet, and a reflux condenser, 200 g of glass bubbles ("Glass Bubbles K37" manufactured by 3M Japan Co., Ltd.; specific gravity 0.37, average particle diameter (D50) 45 μm) and 1000 g of toluene were put into the flask, and then , 10 g of 1,1,1,3,3,3-hexamethyldisilazane (“SZ-31” manufactured by Shin-Etsu Chemical Co., Ltd.) was charged, and stirred for 2 hours. The glass spheres were filtered and dried to obtain glass spheres (E-1) surface-treated with 1,1,1,3,3,3-hexamethyldisilazane.

manufacture example 3

[0055] (Manufacture example 3: Manufacture of glass bulb (E-2))

[0056] Into a four-necked flask equipped with a stirrer, an inert gas inlet, and a reflux condenser, 200 g of glass bubbles ("Glass Bubbles K37" manufactured by 3M Japan Co., Ltd.; specific gravity 0.37, average particle diameter (D50) 45 μm) and 1000 g of toluene were put into the flask, and then 15 g of 3-methacryloxypropyltrimethoxysilane ("KBM-503" manufactured by Shin-Etsu Chemical Co., Ltd.) was thrown in, and it stirred for 2 hours. Glass spheres (E-2) surface-treated with 3-methacryloxypropyltrimethoxysilane were obtained by filtering and drying the glass spheres.

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PUM

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Abstract

The present invention provides: a resin composition capable of obtaining a molded article having excellent manufacturing suitability, excellent surface smoothness and low specific gravity; forming the material; and a molded article thereof. A resin composition is used which is characterized by containing (A) an unsaturated polyester that is a polycondensate of a polyol component and a polyacid component containing 90 mol% or more of maleic acid and / or fumaric acid, (B) a hydrogenated styrene-based thermoplastic elastomer, (C) a styrene monomer, (D) an inorganic filler, (E) glass balls, (F) a wetting dispersant, and (G) a polymerization initiator, and which is characterized in that: the unsaturated polyester (A) is a polycondensate of a polyol component and a polyacid component containing 90 mol% or more of maleic acid and / or fumaric acid; relative to 100 parts by mass of the total of the unsaturated polyester (A), the hydrogenated styrene-based thermoplastic elastomer (B) and the styrene monomer (C), the inorganic filler (D) is 10-100 parts by mass, the glass balls (E) are 5-40 parts by mass, and the wetting dispersant (F) is 1-10 parts by mass.

Description

technical field [0001] The present invention relates to a resin composition, a molding material, and a molded article thereof. Background technique [0002] Sheet molding compound (SMC) is made into a sheet by impregnating a paste (composite) mixed with a thermosetting resin, an inorganic filler, a thickener, a curing agent, etc. It is a semi-cured molding material. This SMC is heated and press-molded with a mold to obtain a molded product. Such molded products are widely used as bathroom equipment, water storage tanks, septic tanks, building materials, floor materials, electrical parts, and vehicle materials, etc., especially for vehicles, due to their excellent durability, water resistance, and mechanical strength. Lightweight is required in materials, aircraft materials, etc. [0003] For their FRP, glass fibers are used to obtain sufficient strength, and inorganic fillers such as calcium carbonate are often added to reduce costs. The specific gravity is about 1.7 to 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/08C08L53/02C08K9/06C08K7/18C08K3/26C08K7/14C08K13/06
CPCC08L51/08C08K2003/265C08L53/025C08K9/06C08K7/18C08K3/26C08K7/14C08K13/06
Inventor 船山胜也盐根英树柴田欧
Owner DIC CORP