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Vinyl chloride resin composition and molded article

A technology of vinyl chloride resin and composition, which is applied in the field of vinyl chloride resin composition, can solve problems such as fogging, heat aging resistance, plasticizer transfer, etc., and achieve improved printability, excellent flexibility, and mixed Excellent refining effect

Pending Publication Date: 2022-08-05
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the plasticizer contained in the flexible vinyl chloride-based resin composition sometimes causes problems of migration and fogging (from fogging of the plasticizer).
In addition, due to the characteristics of plasticizers, etc., heat aging resistance may become a problem

Method used

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  • Vinyl chloride resin composition and molded article
  • Vinyl chloride resin composition and molded article
  • Vinyl chloride resin composition and molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0103]Hereinafter, the present invention will be specifically described with reference to Examples and the like, but the present invention is not limited to these Examples. In addition, in the production examples shown below, the monomers and other compounds were dried and purified by a conventional method, and were used by degassing with nitrogen gas. In addition, the transport and supply of monomers and other compounds to the reaction system were performed under a nitrogen atmosphere. In addition, various physical properties of Examples and Comparative Examples were measured or evaluated by the following methods.

[0104] In the following examples, the weight average molecular weight (Mw) and the number average molecular weight (Mn) of the acrylic block copolymer were obtained by GPC in terms of molecular weight in terms of polystyrene, and the molecular weight distribution (Mw / Mn) was calculated from these values. The measurement apparatus and conditions used in GPC are as...

manufacture example 2～7

[0157] Acrylic acid was produced in the same manner as in Production Example 1, except that the addition amounts of the monomers in the steps (1) and (3), and the types and addition amounts of the monomers in the step (2) were changed as shown in Table 1. Block copolymers (B-2) to (B-7).

[0158] [Table 1]

[0159]

[0160] MMA: methyl methacrylate

[0161] nBA: n-butyl acrylate

[0162] 2EHA: 2-ethylhexyl acrylate

[0163] In addition, in the Example and the comparative example, the following thing was used as each component used for the vinyl chloride resin composition.

[0164] Vinyl chloride resin (A): Shin-Etsu Chemical Co., Ltd. product, "TK-1000" (average degree of polymerization 1000)

[0165] ·Gelling accelerator (C-1): "METABLENP550A" manufactured by Mitsubishi Chemical Corporation

[0166] ·Gelling accelerator (C-2): "METABLENP530A" manufactured by Mitsubishi Chemical Corporation

[0167] Plasticizer: Tokyo Chemical Industry Co., Ltd., "DINP"

[0168] Plas...

Embodiment 1

[0173] As shown in Table 2, 80 parts by mass of the acrylic block copolymer (B-1) shown in Table 1 and 5 parts by mass of the gelation accelerator were mixed with 100 parts by mass of the vinyl chloride resin using a Henschel mixer. parts, 1 part by mass of stabilizer, and 0.5 part by mass of lubricant, and were stirred and mixed for 5 minutes to obtain a raw material mixture. Next, the raw material mixture was kneaded with twin rolls heated to 160° C. for 5 minutes under the conditions described in the item of kneading property to obtain a vinyl chloride-based resin composition. The obtained vinyl chloride-based resin composition was press-molded under the conditions described in the item of kneadability, and a 2-mm-thick pressed tablet and a 1-mm-thick pressed tablet were produced. Using the obtained compressed tablets, kneading properties, bending whitening properties, flexibility, fogging properties, heat aging resistance, transfer properties, low-temperature properties, e...

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Abstract

Provided are: a vinyl chloride-based resin composition which has excellent kneadability when used to produce a vinyl chloride-based resin composition containing an acrylic block copolymer by melt kneading or the like, and which has excellent processability when used to produce a vinyl chloride-based resin composition containing an acrylic block copolymer; and a molded article containing the vinyl chloride-based resin composition. The present invention provides a vinyl chloride-based resin composition which has improved thermal aging resistance, transfer resistance, fog resistance, electrical characteristics, and printability without compromising the excellent flexibility, bending whitening resistance, and low-temperature characteristics that are always possessed by a vinyl chloride-based resin composition, particularly a soft vinyl chloride-based resin composition. A vinyl chloride-based resin composition containing: a vinyl chloride-based resin (A); an acrylic block copolymer (B) having a polymer segment (b1) containing an acrylic acid ester unit and a polymer segment (b2) containing a methacrylic acid ester unit; the weight-average molecular weight of the acrylic block copolymer (B) is in the range of 100000-250000, the content of the polymer segment (b2) in the acrylic block copolymer (B) is in the range of 10-25 mass%, and 20-150 parts by mass of the acrylic block copolymer (B) and 4-18 parts by mass of the gelling accelerator (C) are contained per 100 parts by mass of the vinyl chloride resin (A).

Description

technical field [0001] The present invention relates to a vinyl chloride-based resin composition and a molded article containing the composition. Background technique [0002] Vinyl chloride-based resin compositions, in particular, so-called soft vinyl chloride-based resin compositions having a Durometer hardness of about 50 to 100 according to JIS K6253-3:2012 have excellent processability and mechanical properties, so they are used as coatings. Molded products such as materials, films, and sheets are used in a wide range of applications such as construction materials, automotive materials, and electrical / electronic materials. In consideration of flexibility and moldability, the soft vinyl chloride-based resin composition generally tends to be rich in plasticizers. [0003] However, the plasticizer contained in the soft vinyl chloride-based resin composition may cause problems of transfer and fogging (fog caused by the plasticizer). In addition, heat aging resistance may ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08F297/02C08L33/02C08L53/00
CPCC08L27/06C08L53/00C08F297/02C08L2205/03C08L33/12C08F297/026
Inventor 川原萌赤井真小野友裕
Owner KURARAY CO LTD
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