Ionomer resin, resin compositions containing same and uses of both

Abstract

Provided are an ionomer resin which is well-balanced between processability in molding and mechanical properties and which can form olefin molded articles; resin compositions containing the same; and molded articles of the ionomer resin or the resin compositions. An ionomer resin (X1) formed from (A) 100 parts by weight of an olefin polymer which comprises constituent units derived from an a-olefin having 2 to 20 carbon atoms and has a functional group (alpha) and (B) 0.01 to 100 parts by weight of a metal salt having two or more functional groups (b).

Description

technical field [0001] The present invention relates to an ionomer resin and a resin composition containing the ionomer resin, more specifically, to an ionomer resin with improved extensional viscosity and a resin composition containing the ionomer resin . The ionomer resin of the present invention and the resin composition containing the ionomer resin are suitably used as, for example, blow molding products, foam molding products, or resin modified materials. Background technique [0002] Polypropylene generally has a lower melt viscosity than polyethylene, and is known as a material that does not exhibit "strain curability" in which viscosity increases with strain when uniaxial tensile deformation is imparted. On the other hand, in specific molding methods such as blow molding, foam molding, and vacuum molding, materials showing strain hardening properties are suitable from the viewpoint of molding processability. In this sense, polypropylene is considered to be unsuitab...

AI Technical Summary

Problems solved by technology

[0005] However, due to the low compatibility between polypropylene and ethylene-based ionomer resins, phase separation occurs in molded products, and there is a problem that the balance of mechanical properties such as rigidity, ductility, and impact resistance is significantly lowered.

[0006] In addition, in the method (2), although strain curability can be imparted, there is a problem that the balance of mechanical properties is impaired due to the low compatibility between polypropylene and ultra-high molecular weight polyethylene.

[0007] In the method (3), when a peroxide is used, the main chain of polypropylene is decomposed at the same time as the branched structure is introduced. Food hygiene problems caused by odor of peroxides, undecomposed peroxide residues, etc.

In addition, when irradiation with electron beams is used, there are problems in that a large-scale device is required; mechanical strength is lowered along with a decrease in crystallinity due to the introduction of a branched structure; and it is difficult to recycle

However, in order to impart sufficient strain curability to polypropylene, the effect is poor when added in a small amount. Conversely, if the ionomer resin is added in a large amount to the extent that strain curability is exhibited, there is a problem that the mechanical strength decreases.

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