Mitsui Chemicals, Inc.

Yoji Hayakawa

Hiroshi Hoya

Koji Matsunaga

Kunihiko Mizumoto

Kuniaki Kawabe

Kenji Sugimura

Akinori Etoh

Mai Kurihara

Toshiyuki Itou

Masayoshi Sutou

Shinichirou Asao

Ikuo Akai

Hiroto Yasui

Shin Tokui

[Object] To provide a resin composition with excellent mold releasability and blocking resistance. [Solution] A resin composition containing a 4-methyl-1-pentene polymer includes 0.01 to 10 parts by mass of a 4-methyl-1-pentene polymer (B) per 100 parts by mass of at least one resin (A) selected from the group consisting of thermoplastic resins and thermosetting resins, wherein the 4-methyl-1-pentene polymer (B) has (B1) an intrinsic viscosity [&#x3b7;] of 0.01 or more but less than 0.50 dl/g measured at 135&#xb0; C. in a decalin solvent.

4-methyl-1-pentene polymer, resin composition containing 4-methyl-1-pentene polymer, masterbatch thereof, and formed product thereof

It is an object of the present invention to provide adhesive compositions having excellent flexibility, rubber elasticity, mechanical properties, heat resistance and low-temperature properties. An adhesive composition of the invention includes 10 to 70 parts by weight of a soft polypropylene resin composition (X) which includes 40 to 98 wt % of a propylene copolymer (A) satisfying the following requirements (A) to (A) and 2 to 60 wt % of a crystalline isotactic polypropylene (B) satisfying the following requirements (B) to (B), and 30 to 90 parts by weight of a tackifier (C) (wherein the total of the component (X) and the component (C) is 100 parts by weight), wherein (A) Shore A hardness: 20 to 90; (A) the copolymer comprises a copolymer with Cunits at 51 to 90 mol %, Cunits at 7 to 24 mol % and C&#x3b1;-olefin units at 3 to 25 mol %; (A) Mw/Mn: 1.2 to 3.5; (A) mm: 85 to 99.9%; (A) value B: 0.8 to 1.3; (A) 2,1-insertion ratio: less than 1%; (A) Tg: &#x2212;10&#xb0; C. to &#x2212;50&#xb0; C.; (A) MFR (230&#xb0; C.): 0.5 to 500 g/10 min; (B) Tm: 100 to 175&#xb0; C.; (B) mmmm: 90 to 99.8%; (B) MFR (230&#xb0; C.): 0.1 to 100 g/10 min.

Adhesive composition and adhesive containing the same

It is an object of the present invention to provide a propylene-based polymer composition which is excellent in transparency and heat resistance (particularly, heat resistance at high heat deformation temperature) and is free from occurrence of stickiness even when it is used at a high temperature for a long period of time. The propylene-based polymer composition of the invention comprises (A) a propylene-based polymer (PP) satisfying the following requirements (1) and (2), in an amount of 1 to 99 parts by weight, and (B) a propylene/ethylene/&#x3b1;-olefin copolymer satisfying the following requirements (I) to (IV), in an amount of 99 to 1 part by weight, with the proviso that the total amount of the component (A) and the component (B) is 100 parts by weight; (1) the polymer (A) has a melting point (Tm), as measured by a differential scanning calorimeter (DSC), of not lower than 110&#xb0; C. but not higher than 170&#xb0; C., (2) the polymer (A) has an isotactic pentad fraction (mmmm fraction) of not less than 90%, (I) the copolymer (B) contains constitutional units derived from propylene in amounts of 73.1 to 87.0% by mol, constitutional units derived from ethylene in amounts of 10.0 to 16.9% by mol and constitutional units derived from an &#x3b1;-olefin of 4 to 20 carbon atoms in amounts of 3.0 to 10.0% by mol, (II) the copolymer (B) has an isotactic triad fraction (mm), as calculated byC-NMR, of not less than 85%, and (III) the copolymer (B) has a molecular weight distribution (Mw/Mn, Mw: weight-average molecular weight, Mn: number-average molecular weight, both being in terms of polystyrene), as measured by gel permeation chromatography (GPC), of not more than 3.5.

Propylene-based polymer composition

Propylene-based polymers (A) are provided which, when used as pressure-sensitive adhesives to various adherends, show a desired initial adhesion and will not contaminate the adherends and which have excellent pellet handling properties. Pellets of the invention contain the propylene-based polymers (A). Pressure-sensitive adhesives of the invention contain the propylene-based polymers (A). The propylene-based polymer (A) includes 65 to 80 mol % of a structural unit derived from propylene, 5 to 10 mol % of a structural unit derived from ethylene and 15 to 25 mol % of a structural unit derived from a C4-20 &#x3b1;-olefin (wherein these percentages are calculated based on 100 mol % of the total of the structural unit derived from propylene, the structural unit derived from ethylene and the structural unit derived from a C4-20 &#x3b1;-olefin) and has a heat of crystal fusion of 5 to 45 (J/g) as measured by DSC. Compositions of the invention contain the propylene-based polymers (A).

Propylene-based polymer, propylene-based polymer composition, pellet and pressure-sensitive adhesive

[Problem] To provide a thermoplastic resin composition which is excellent in transparency and adhesion properties and hardly causes staining of an adherend after it is separated, a multilayer laminate using the composition, an article, and a method for protecting a surface of an article. [Means for solving problem] A thermoplastic resin composition (X) comprising the following components (A) to (C): (A) isotactic polypropylene containing not less than 90% by mol of propylene units, in an amount of 1 to 65% by weight, (B) a propylene copolymer which is a copolymer of propylene and at least one &#x3b1;-olefin of 2 to 20 carbon atoms (excluding propylene) and whose melting point, as measured by DSC, is lower than 65&#xb0; C. or is not observed, in an amount of 30 to 94% by weight, and (C) a 1-butene-based polymer which is selected from the group consisting of a 1-butene homopolymer and a copolymer of 1-butene and an &#x3b1;-olefin of 2 to 20 carbon atoms (excluding 1-butene) (said copolymer containing not less than 16% by mol of 1-butene units) and whose melting point, as measured by DSC, is in the range of 65 to 135&#xb0; C., in an amount of 5 to 60% by weight, the total amount of said components (A) to (C) being 100% by weight.

Thermoplastic resin composition, multilayer laminate comprising the same, article obtained by allowing the thermoplastic resin composition to adhere thereto, and method for protecting surface of article

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Chiba, Japan

Yoji Hayakawa