4-methyl-1-pentene polymer, resin composition and molded article

Patent metadata

Field	Value
Publication number	US-11034782-B2
Application number	US-201716492125-A
Country	US
Kind code	B2
Filing date	Dec 19, 2017
Priority date	Mar 27, 2017
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A 4-methyl-1-pentene polymer (X) wherein a content of a constitutional unit derived from 4-methyl-1-pentene is 90 to 100% by mol; a content of a constitutional unit derived from at least one olefin selected from ethylene and an α-olefin, other than 4-methyl-1-pentene, having 3 to 20 carbon atoms is 0 to 10% by mol; and the 4-methyl-1-pentene polymer satisfies certain requirements (a) to (f): (a) a meso diad fraction (m) measured by 13 C-NMR falling within a certain range; (b) a ratio of weight-average molecular weight Mw within a certain range; (c) a melt flow rate (MFR) within a certain range; (d) a cumulative weight fraction within a certain range; (e) a proportion of a polymer having a molecular weight of a certain range; and (f) a heat of fusion and a melting point of the 4-methyl-1-pentene polymer within certain ranges.

First claim

The invention claimed is:

1. A 4-methyl-1-pentene polymer (X) wherein: a content of a constitutional unit derived from 4-methyl-1-pentene is 90 to 100% by mol; a content of a constitutional unit derived from at least one olefin selected from ethylene and an α-olefin, other than 4-methyl-1-pentene, having 3 to 20 carbon atoms is 0 to 10% by mol; and the 4-methyl-1-pentene polymer satisfies all the following requirements (a) to (f):
(a) a meso diad fraction (m) measured by 13 C-NMR falls within the range of 70.0% or more to less than 98.0%;
(b) a ratio of weight-average molecular weight Mw to number-average molecular weight Mn (Mw/Mn) measured by gel permeation chromatography (GPC) falls within the range of 3.6 to 30;
(c) a melt flow rate (MFR) measured under conditions of 260° C. and a 5 kg load in conformity to ASTM D1238 falls within the range of 0.1 to 500 g/10 min;
(d) a cumulative weight fraction of amounts of eluates at 80° C. or lower measured in a cross fractionation chromatograph apparatus using an infrared spectrophotometer as a detector part is 5% by mass or less;
(e) a proportion of a polymer having a molecular weight of 1×10 6 or larger measured by gel permeation chromatography (GPC) is 15% by mass or more; and
(f) a heat of fusion and a melting point of the 4-methyl-1-pentene polymer measured by differential scanning calorimetry (DSC) satisfy the following requirements (i) and (ii):
(i) the following expression (1) holds:
Δ Hm< 0.5× Tm− 76  Expression (1)

wherein the heat of fusion is defined as ΔHm J/g, and the melting point is defined as Tm ° C.; and
(ii) the melting point falls within the range of 180 to 260° C.

2. A resin composition comprising a 4-methyl-1-pentene polymer (X) according to claim 1 .

3. A molded article comprising a 4-methyl-1-pentene polymer (X) according to claim 1 or a resin composition according to claim 2 .

4. The molded article according to claim 3 , wherein the molded article is an injection molded article or an extrusion molded article.

5. The molded article according to claim 3 , wherein the molded article is a film.

6. The molded article according to claim 3 , wherein the molded article is a blow molded article.

Assignees

• Mitsui Chemicals Inc

Inventors

• Tanaka Masakazu
• Sasaki Toyoaki
• Matsugi Tomoaki

Classifications

• C08F4/65912

  in combination with an organoaluminium compound · CPC title

• C08F10/14 Primary

  Monomers containing five or more carbon atoms · CPC title

• C08F110/14

  Monomers containing five or more carbon atoms · CPC title

• C08F2500/26

  Use as polymer for film forming · CPC title

• C08F210/14 Primary

  Monomers containing five or more carbon atoms · CPC title