Master batch and use thereof

A masterbatch, organic substrate technology, applied in railway braking systems, railway car body parts, transportation and packaging, etc., can solve the problems of inability to lighten weight, poor dispersibility, high melt viscosity, and achieve the effect of good disposal.

Active Publication Date: 2016-09-28
MATSUMOTO YUSHI SEIYAKU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if processing is performed at a temperature as close as possible to the melting point of the thermoplastic resin so as not to expand, the melt viscosity will be very high, making handling difficult.
[0006] In addition, in expansion moldings obtained by molding a masterbatch processed at a temperature as close as possible to the melting point of a thermoplastic resin together with a soft resin used as a sealing material, the dispersibility is poor and the weight cannot be sufficiently reduced.
In particular, when thermally expandable microspheres with a small particle size are used, poor dispersion occurs, resulting in insufficient weight reduction

Method used

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  • Master batch and use thereof
  • Master batch and use thereof
  • Master batch and use thereof

Examples

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Embodiment

[0129] Hereinafter, examples of the present invention will be specifically described. Moreover, this invention is not limited to these Examples. In the following examples and comparative examples, unless otherwise specified, the so-called "%" means "% by weight", and the so-called "part" means "parts by weight".

[0130] Before the examples, production examples of various heat-expandable microspheres are given. Hereinafter, thermally expandable microspheres may be referred to as "microspheres" for simplicity.

[0131] 〔Measurement of average particle diameter and particle size distribution〕

[0132] A laser diffraction particle size distribution analyzer (HEROS & RODOS manufactured by Sympatec Corporation) was used. The dispersion pressure of the dry dispersing module is 5.0 bar, and the vacuum degree is 5.0 mbar. It is measured by a dry measurement method, and the D50 value is taken as the average particle diameter.

[0133] Determination of expansion start temp...

manufacture example 2～4

[0147] Thermally expandable microspheres were respectively obtained in the same manner as in Production Example 1, except that various components and amounts used in the polymerization step of Production Example 1 were changed to those shown in Table 1. Table 1 shows the physical properties of the obtained microspheres.

[0148] The heat-expandable microspheres obtained in Production Examples 1 to 4 above were referred to as microspheres (1) to (4), respectively.

[0149] [Table 1]

[0150]

Embodiment 1

[0152] (masterbatch)

[0153] Using a pressurized kneader with a capacity of 10 L, ethylene-ethyl acrylate copolymer (manufactured by Dow Chemical Japan Co., Ltd., NUC-6070, melt flow rate 250 g / 10 min, melting point 87 ° C, ethylene content rate 75 % by weight, true specific gravity 0.94, tensile failure stress 5MPa) 2.4kg melt-kneaded, when the kneading temperature reached 95°C, mixed with 5.6kg of heat-expandable microspheres obtained in Production Example 1 and uniformly mixed to make a premix . The discharge amount of the premix from the pressurized kneader was measured, and the discharge performance (handling performance) at the time of masterbatch production was evaluated based on the evaluation criteria shown below. As a result, good discharge performance was confirmed. The results are shown in Table 2.

[0154] Then, the obtained premix was supplied to a twin-screw extruder with a barrel diameter of 40 mm, and extruded at an extrusion temperature of 90° C. to ...

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Abstract

Provided is a master batch having excellent handleability during production, the master batch making it possible to mold a lighter weight expansion molded article, and the use thereof. A master batch containing heat-expandable microspheres configured from an outer shell comprising thermoplastic resin and a foaming agent that is vaporized by heating contained in the outer shell, and an organic base material component, wherein the melting point of the organic base material component is lower than the expansion start temperature of the heat-expandable microspheres, the melt flow rate (MFR, unit: g / 10 min) of the organic base material component satisfies the equation 50 < MFR <= 2200, and the weight ratio of the heat-expandable microspheres is 30-80 wt% of the total weight of the heat-expandable microspheres and the organic base material component.

Description

technical field [0001] The present invention relates to a masterbatch and its use. Background technique [0002] Conventionally, in the case of producing various foamed expanded products such as films, sheets, and injection molded products, foaming components such as heat-expandable microspheres and various chemical foaming agents are mixed with resin pellets and molded. However, the foaming component used here is easy to scatter, and even if it is mixed with resin particles, the resin particles and the foaming component are easily separated during supply to various molding machines, so the dispersibility of the foaming component in the mixture is poor. In the body, there will be problems such as uneven foaming and uneven strength. [0003] Therefore, a method of kneading resin particles and foaming components in advance at a temperature above the softening temperature of the resin particles and below the foaming temperature of the foaming components to prepare a pelletized...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/22C08J3/12C08J9/32C08K5/00C08K9/10C08L23/04C08L33/18C08L101/00B61H1/00B61H5/00B61H15/00F16D49/00F16D55/224F16D65/00F16D65/28
CPCB61H1/003B61H5/00B61H15/0028C08J9/32C08J2201/024C08J2203/22C08J2205/044C08J2300/22C08J2300/26C08J2323/00C08J2423/08C08L33/18C08L2310/00C08L101/00C08J3/22C08K7/16C08K9/10C08L23/04C08L23/0869C08L2207/04C08J3/226C08J9/228C08J9/236C08J2300/12C08L2205/18C08J2333/08C08L33/08F16D49/00F16D55/2245F16D65/0037
Inventor 江部匠三木胜志
Owner MATSUMOTO YUSHI SEIYAKU
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