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Resin composition for molding material and molded article made therefrom

A technology of resin composition and molding material, applied in the field of resin composition for molding material, can solve the problems of low moldability, exudation of plasticizer, low hardness and tear strength of molded products, etc., and achieves excellent processability, hardness, etc. and excellent tear strength

Active Publication Date: 2006-11-08
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that when an acrylic polymer and a plasticizer are used as the resin composition for molding processing, the moldability during molding is low, and the hardness and tear strength of the molded product obtained are low, and Leakage of plasticizer, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～22、 comparative example 1～5

[0115] Acrylic polymers A1-A8, B1-B2, dioctyl phthalate (DOP), diisononyl phthalate (DINP), Polyester plasticizers such as polyether esters and adipic acid polyesters, butyl acrylate polymers with a molecular weight of 1,000 to 10,000, acrylic oligomers such as butyl acrylate-styrene copolymers, and polypropylene glycol, using Banbury Agitate with a kneader to obtain a mixture.

Embodiment 23～27

[0117] The acrylic polymer A1, diisononyl phthalate, calcium carbonate, antioxidant, and lubricant obtained in the above-mentioned production example were measured in the ratio shown in Table 3, and stirred with a Banbury mixer to obtain a mixture .

[0118] For Examples 1 to 27, and Comparative Examples 1 to 5, use a co-rotating twin-screw extruder (four-hole die), set the temperature in the order of C1, C2, C3, C4, C5, C6, C7, D It is specified as 110°C, 150°C, 170°C, 180°C, 190°C, 190°C, 200°C, 200°C, under the conditions of engine speed 230rpm and feeder speed 15rpm, it will be formulated according to the formula in Table 2 mixture made into pills. The pellets were kneaded at a set temperature of 160° C. using an 8-inch test roll to form a sheet. Table 2 shows the processability in roll forming and the evaluation results of various physical properties of the obtained sheet.

[0119] In addition, for Examples 23-27, the mixture compounded according to the compounding rec...

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PUM

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Abstract

A resin composition for molding materials which comprises: an acrylic polymer comprising primary particles which have a core / shell structure comprising a core polymer and a shell polymer and in which the core polymer and shell polymer comprise methyl methacrylate monomer units and the content of methyl methacrylate monomer units in the core polymer is lower than that of methyl methacrylate monomer units in the shell polymer; and a plasticizer. The resin composition has high moldability during molding and gives a molded article having high hardness and high tear strength and reduced in plasticizer bleeding.

Description

technical field [0001] The present invention relates to a resin composition for molding materials comprising an acrylic polymer and a plasticizer. Background technique [0002] Acrylic resins are excellent in transparency and weather resistance, and are used as molding materials for calender molding, extrusion molding, injection molding, and the like. [0003] For example, an acrylic resin film molded by T-die extrusion can be used for surface protection of molded articles such as polycarbonate and polyvinyl chloride. Moreover, it is known that a soft acrylic resin film is excellent in weather resistance compared with a conventionally used soft vinyl chloride resin film (for example, refer patent document 1). [0004] Patent Document 1: JP-A-2000-103930 Contents of the invention [0005] The technical problem to be solved by the present invention is that when an acrylic polymer and a plasticizer are used as the resin composition for molding processing, the moldability du...

Claims

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Application Information

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IPC IPC(8): C08L33/12
Inventor 笠井俊宏关田真理伊藤公一
Owner MITSUBISHI CHEM CORP
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