Modifier, usage therefor, production method for modifier, and carrier for additive material

Abstract

Disclosed herein are a modifier having a continuous phase (A) containing a second polyolefin resin and a dispersed phase (B) containing a polyamide resin and a modified elastomer, wherein the dispersed phase (B) is composed of a melt-kneaded product of the polyamide resin and the modified elastomer having a reactive group, and wherein when a total of the continuous phase (A) and the dispersed phase (B) is 100% by mass, a content of the dispersed phase (B) is 80% by mass or less, a method for using the modifier, including mixing 0.5 parts by mass or more but 70 parts by mass or less of the modifier per 100 parts by mass of a first polyolefin resin, and a method for producing the modifier, including the step of melt-kneading the second polyolefin resin and a melt-kneaded product of the polyamide resin and the modified elastomer.

1 . A modifier that can be added to a first polyolefin resin to obtain a molded body having improved impact resistance, the modifier comprising:
 a continuous phase (A) containing a second polyolefin resin; and a dispersed phase (B) dispersed in the continuous phase (A) and containing a polyamide resin and a modified elastomer, wherein   the dispersed phase (B) is composed of a melt-kneaded product of the polyamide resin and the modified elastomer having a reactive group that reacts with the polyamide resin, and wherein   when a total of the continuous phase (A) and the dispersed phase (B) is 100% by mass, a content of the dispersed phase (B) is 80% by mass or less.   
     
     
         2 . The modifier according to  claim 1 , wherein
 the modified elastomer is an olefin-based thermoplastic elastomer having, as its skeleton, a copolymer of ethylene or propylene and an α-olefin having 3 to 8 carbon atoms, or a styrene-based thermoplastic elastomer having a styrene skeleton.   
     
     
         3 . The modifier according to  claim 1 , wherein
 when a total of the polyamide resin and the modified elastomer is 100% by mass, a content of the polyamide resin is 10% by mass or more but 80% by mass or less.   
     
     
         4 . The modifier according to  claim 1 , wherein
 the dispersed phase (B) has a continuous phase (B 1 ) containing the polyamide resin and a fine dispersed phase (B 2 ) dispersed in the continuous phase (B 1 ) and containing the modified elastomer.   
     
     
         5 . The modifier according to  claim 1 , wherein
 the first polyolefin resin is a block copolymerized polyolefin resin having an ethylene block as a dispersed phase.   
     
     
         6 . A method for using the modifier according to  claim 1 , comprising
 mixing 0.5 parts by mass or more but 70 parts by mass or less of the modifier per 100 parts by mass of the first polyolefin resin.   
     
     
         7 . A method for producing the modifier according to  claim 1 , comprising
 a melt-kneading step in which the second polyolefin resin and a melt-kneaded product of the polyamide resin and the modified elastomer are melt-kneaded.   
     
     
         8 . A carrier for additives for use in adding an additive to a first polyolefin resin, comprising:
 a continuous phase (A) containing a second polyolefin resin; and a dispersed phase (B) dispersed in the continuous phase (A) and containing a polyamide resin and a modified elastomer, wherein   the dispersed phase (B) is composed of a melt-kneaded product of the polyamide resin and the modified elastomer having a reactive group that reacts with the polyamide resin, and wherein   when a total of the continuous phase (A) and the dispersed phase (B) is 100% by mass, a content of the dispersed phase (B) is 80% by mass or less.   
     
     
         9 . The carrier for additives according to  claim 8 , wherein
 the additive is at least one of a flame retardant, a flame retardant aid, a filler, a colorant, an antimicrobial agent, an antistatic agent, and a foaming agent.