JP2009249408A - Non-halogen polyolefin resin composition for blow molding, and blow molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-halogen polyolefin based resin composition being excellent in melting strength, having less draw down of parison at blow-molding, being excellent in appearance and having less eccentric thickness, and a blow-molded article obtained by molding it. <P>SOLUTION: In the non-halogen polyolefin based resin composition for blow-molding, 0.01-20 pts.mass of an alkyl methacrylate based polymer (B) containing an alkyl methacrylate unit having a 2-6C alkyl group as a main component and having a mass average molecular weight of 150,000-20,000,000 is formulated based on 100 pts.mass of a polyolefin based resin (A) having a melt flow rate of 0.1-50 g/10 min. The non-halogen polyolefin based resin composition and the blow-molded article obtained from it are provided. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a non-halogen polyolefin-based resin composition for blow molding and a blow-molded product thereof.

Conventionally, in the field of blow molded products, high density polyethylene (hereinafter referred to as “HDPE”), polypropylene (hereinafter referred to as “PP”), low density polyethylene (hereinafter referred to as “LDPE”), linear low density polyethylene. Polyolefin resins such as “LLDPE” (hereinafter referred to as “LLDPE”) have been used in containers such as bottles and cans, and non-containers such as furniture and home appliances.
However, since the polyolefin-based resin is inherently crystalline and has insufficient melt strength at the time of molding, the parison draws down and uneven thickness occurs, which is not particularly suitable for molding a large molded product.

  In order to solve the above problem, for example, a resin having a high molecular weight or a partially cross-linked resin has been proposed in order to increase the melt strength when molding a large molded article (Patent Document 1). However, these resins deteriorate in fluidity and the appearance of the molded product is impaired.In addition, if the molding temperature is increased to increase fluidity, the thermal decomposition of the resin proceeds, the resin molecular weight decreases, and the parison draws. There has been a problem such as down, and it has been difficult to obtain a blow molded product of a large polyolefin resin having a small uneven thickness and excellent appearance.

In addition, a resin composition in which an alkyl (meth) acrylate polymer having a long-chain alkyl group such as stearyl methacrylate or lauryl methacrylate is blended with a polyolefin resin in order to improve the drawdown property and moldability of the parison has been proposed. (Patent Document 2 and Patent Document 3). However, since the alkyl (meth) acrylate polymer having a long-chain alkyl group has a low glass transition temperature, it is difficult to recover it as a powder. When adding an alkyl (meth) acrylate polymer to a polyolefin resin, Handling may be a problem.
JP-A-5-185490 JP-A-8-302098 JP-A-9-255816

  An object of the present invention is to provide a non-halogen polyolefin resin composition for blow molding having excellent melt strength, little parison draw-down during blow molding, excellent appearance, and less uneven thickness, and a blow molded product obtained by molding the same. Is to provide.

The present invention is based on 100 parts by mass of a polyolefin-based resin (A) having a melt flow rate of 0.1 to 50 g / 10 min. A non-halogen polyolefin resin composition for blow molding in which 0.01 to 20 parts by mass of an alkyl methacrylate polymer (B) having an average molecular weight of 150,000 to 20 million is blended is defined as a first invention.
Moreover, this invention makes the blow molded product obtained by blow-molding said halogen-free polyolefin-type resin composition for blow molding 2nd invention.

  The non-halogen polyolefin resin composition for blow molding of the present invention (hereinafter referred to as “the present resin composition”) does not contain a halogen composition, is excellent in molding processability, and does not impair the surface appearance of the resulting molded product. Therefore, molded products including large molded products such as containers such as bottles and cans, automobile parts such as bumpers, non-containers such as OA equipment, home appliances, and furniture can be manufactured by blow molding.

The melt flow rate (hereinafter referred to as “MFR”) of the polyolefin resin (A) used in the present invention is 0.1 to 50 g / 10 min. In addition, the polyolefin resin (A) preferably has a MFR of 0.3 to 15 g / 10 min in order to obtain a large-sized molded article having a small appearance and a small parison draw-down during blow molding.
When the MFR of the polyolefin resin (A) is 0.1 g / 10 min or more, the resin composition has sufficient fluidity, and a molded product having excellent gloss and appearance can be obtained. Further, when the MFR of the polyolefin resin (A) is 50 g / 10 min or less, the drawdown of the parison can be suppressed, and a good large-sized molded product can be obtained.

Examples of the polyolefin resin (A) include PP, HDPE, LDPE, LLDPE, poly-1-butene, polyisobutylene, a random copolymer or block copolymer of at least one selected from propylene and ethylene and 1-butene. Polymers, cyclic polyolefins such as ethylene-propylene-diene terpolymers having a diene component of 50% by mass or less, polymethylpentene, a copolymer of cyclopentadiene and at least one selected from ethylene and propylene, and 50 Random copolymer, block copolymer, or vinyl compound such as vinyl acetate, methacrylic acid alkyl ester, acrylic acid alkyl ester, aromatic ester, aromatic vinyl or the like, and at least one selected from ethylene and propylene. Examples include graft polymers That. These can be used alone or in combination of two or more.
In the present invention, the polyolefin resin (A) is at least one selected from PP, HDPE, LDPE, LLDPE, ethylene-propylene random or block copolymer in that it is highly versatile and inexpensive. Is preferred.

The alkyl methacrylate polymer (B) used in the present invention is mainly composed of an alkyl methacrylate unit having 2 to 6 carbon atoms in the alkyl group, and has a mass average molecular weight of 150,000 to 20 million.
When the mass average molecular weight of the alkyl methacrylate polymer (B) is 150,000 or more, the moldability of the resin composition becomes good. Further, the alkyl methacrylate polymer (B) has a mass average molecular weight of 20 million or less, and the dispersibility of the alkyl methacrylate polymer (B) in the polyolefin resin (A) becomes good, and the drawdown of the parison is reduced. Therefore, a blow molded product having a small appearance, excellent appearance, and no uneven thickness can be obtained.

  The mass average molecular weight of the alkyl methacrylate polymer (B) is preferably 500,000 or more, more preferably 1,000,000 or more, and further preferably 1,600,000 or more. The mass average molecular weight of the alkyl methacrylate polymer (B) is preferably 15 million or less, more preferably 7 million or less.

As the alkyl methacrylate having 2 to 6 carbon atoms in the alkyl group, which is a raw material monomer for constituting the alkyl methacrylate unit having 2 to 6 carbon atoms in the alkyl methacrylate polymer (B), for example, Ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, sec-butyl methacrylate, t-butyl methacrylate, 2-methylbutyl methacrylate, 3-methylbutyl methacrylate, n-pentyl methacrylate, n-hexyl methacrylate And cyclohexyl methacrylate. These can be used alone or in combination of two or more.
The alkyl methacrylate has 2 or more carbon atoms in the alkyl methacrylate, the dispersibility of the alkyl methacrylate polymer (B) in the polyolefin resin (A) is good, the alkyl group has 6 or less carbon atoms, The handleability when the coalesced (B) is powdered is improved.

  As the alkyl methacrylate having 2 to 6 carbon atoms in the alkyl group, the dispersibility of the alkyl methacrylate polymer (B) in the polyolefin resin (A) and the alkyl methacrylate polymer (B) as a powder From the viewpoint of handleability, alkyl methacrylate having 4 carbon atoms in the alkyl group is preferable. In addition, as the alkyl methacrylate having 2 to 6 carbon atoms in the alkyl group, n-butyl methacrylate and isobutyl methacrylate are more preferable in terms of improving the molding processability of the resin composition.

In the present invention, as a raw material monomer for constituting the alkyl methacrylate polymer (B), if necessary, other monomers other than alkyl methacrylate having 2 to 6 carbon atoms in the alkyl group are contained. be able to.
Other monomers include, for example, aromatic vinyl monomers such as styrene, α-methylstyrene and chlorostyrene; alkyl acrylates such as methyl acrylate, n-butyl acrylate, isobutyl acrylate, t-butyl acrylate and lauryl acrylate. Alkyl methacrylate having 7 or more alkyl groups such as lauryl methacrylate; vinyl cyanide monomers such as acrylonitrile and methacrylonitrile; vinyl ethers such as vinyl methyl ether and vinyl ethyl ether; vinyl acetate and vinyl butyrate And olefins such as ethylene, propylene, and isobutylene, and diene monomers such as butadiene, isoprene, and dimethylbutadiene. These can be used alone or in combination of two or more.

  The content of the alkyl methacrylate having 2 to 6 carbon atoms of the alkyl group in the raw material monomer for constituting the alkyl methacrylate polymer (B) is preferably 50% by mass or more, more preferably 70% by mass or more, 90 mass% or more is still more preferable. When the content of the alkyl methacrylate having 2 to 6 carbon atoms in the alkyl group is 50% by mass or more, the dispersibility of the alkyl methacrylate polymer (B) in the polyolefin resin (A) becomes good, and the drawdown of the parison There are few, and an external appearance is excellent and the blow molded product without uneven thickness is obtained.

Examples of the polymerization method for obtaining the alkyl methacrylate polymer (B) include a radical polymerization method and an ionic polymerization method, and a radical polymerization method is preferable.
The alkyl methacrylate polymer (B) is preferably in the form of powder or granules, so that emulsion polymerization is preferred. As a method of emulsion polymerization, a known method may be mentioned.

Known emulsifiers can be used as the emulsifier used in the emulsion polymerization.
As specific examples of the emulsifier, anionic emulsifiers such as a sulfonic acid salt compound, a sulfuric acid salt compound, and a phosphate ester salt compound are preferable. These can be used alone or in combination of two or more.

Known initiators can be used as the initiator used in the emulsion polymerization.
Specific examples of the initiator include persulfate compounds such as potassium persulfate and sodium persulfate; organic peroxides such as t-butyl hydroperoxide, cumene hydroperoxide and benzoyl peroxide; azobisisobutyronitrile And redox initiators in which the above-mentioned persulfate compound or organic peroxide and a reducing agent are combined. Of these, potassium persulfate and sodium persulfate are preferred.

The polymerization temperature during emulsion polymerization is usually 40 to 80 ° C., although it depends on the type of initiator.
Examples of the method of powdering the latex of the alkyl methacrylate polymer (B) obtained by emulsion polymerization include a coagulation method and a spray drying method.

The mass average particle diameter of the alkyl methacrylate polymer (B) in the latex of the alkyl methacrylate polymer (B) obtained by emulsion polymerization is preferably 50 to 250 nm.
The mass average particle diameter of the alkyl methacrylate polymer (B) is 50 nm or more, and the emulsifier used in the emulsion polymerization tends to suppress the influence of coloring and strength reduction on the polyolefin resin. Moreover, the molecular weight control when obtaining a high molecular weight alkyl methacrylate polymer (B) having a mass average particle size of the alkyl methacrylate polymer (B) of 250 nm or less, particularly a mass average molecular weight of 1.6 million or more, is easy. There is a tendency.
In the present invention, the alkyl methacrylate polymer (B) may contain various additives such as a lubricant, a stabilizer, and a flame retardant as necessary.

  This resin composition is obtained by blending 0.01 to 20 parts by mass of an alkyl methacrylate polymer (B) with 100 parts by mass of a polyolefin resin (A). When the blending amount of the alkyl methacrylate polymer (B) is 0.01 parts by mass or more, the drawdown of the parison can be suppressed, and when it is 20 parts by mass or less, the fluidity of the resin composition becomes good and the appearance is excellent. A blow molded product can be obtained.

In the present invention, additives such as stabilizers, lubricants, inorganic fillers and the like can be added to the resin composition as necessary.
Examples of the stabilizer include pentaerythrityl-tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], triethylene glycol-bis [3- (3-tert-butyl-5). Phenol stabilizers such as -methyl-4-hydroxyphenyl) propionate], phosphorus stabilizers such as tris (monononylphenyl) phosphite, tris (2,4-di-t-butylphenyl) phosphite, and dilauryl And sulfur stabilizers such as thiodipropionate. These can be used alone or in combination of two or more.
The blending amount of the stabilizer is preferably 0.05 parts by mass or less with respect to 100 parts by mass of the polyolefin resin (A).

Examples of the lubricant include sodium, calcium or magnesium salts of saturated or unsaturated fatty acids such as lauric acid, palmitic acid, oleic acid and stearic acid. These can be used alone or in combination of two or more.
The blending amount of the lubricant is preferably 0.1 to 2 parts by mass with respect to 100 parts by mass of the polyolefin resin (A).

Examples of the inorganic filler include calcium carbonate, magnesium carbonate, calcium sulfate, magnesium hydroxide, aluminum hydroxide, talc, mica, kaolin, silica, clay, zeolite, and glass fiber. These can be used alone or in combination of two or more.
As for the compounding quantity of an inorganic filler, 1-50 mass parts is preferable with respect to 100 mass parts of polyolefin resin (A).

  As a blending method of the polyolefin resin (A), the alkyl methacrylate polymer (B) and, if necessary, the additive for obtaining the resin composition, for example, ordinary kneading such as a roll, a Banbury mixer, an extruder, etc. The method of kneading using a machine is mentioned. Moreover, it is preferable to pelletize after the said kneading | mixing from the point of handleability.

Furthermore, the following method is mentioned as another method of obtaining this resin composition.
First, a polyolefin resin (A1), an alkyl methacrylate polymer (B), and additives as necessary are blended as a part of the polyolefin resin (A) to obtain a master pellet (master batch). Subsequently, polyolefin resin (A2) is mix | blended with this master pellet as a part of polyolefin resin (A), and this resin composition is obtained. In this method, the polyolefin resin (A1) and the polyolefin resin (A2) are an alkyl methacrylate polymer (B) based on 100 parts by mass of the total amount of the polyolefin resin (A1) and the polyolefin resin (A2). It mix | blends so that a compounding quantity may be 0.01-20 mass parts. The polyolefin resin (A1) and the polyolefin resin (A2) may be the same polyolefin resin (A) or different polyolefin resins (A).

In the present invention, blow molding can be performed by a known method.
Examples of the blow molding method include a method of extruding a molten resin parison using an extruder, clamping the parison with a blow mold, and then blowing air to obtain a predetermined shape. Moreover, as another method of the blow molding method, for example, a method of obtaining a predetermined shape by blowing air into a preform obtained by using an injection molding machine using a blow molding machine.

  In the present invention, the blow molded product is obtained by molding the resin composition with a blow molding machine. The shape of the blow molded product can be various shapes such as bottles, cans, hollow plates and cylinders. Moreover, since this resin composition is excellent in melt strength and has little draw down of the parison at the time of blow molding, it is particularly suitable for production of a large blow molded product.

  Hereinafter, the present invention will be described by way of examples. In the following, “part” and “%” represent “part by mass” and “% by mass”, respectively. In addition, the MFR of the polyolefin resin, the mass average molecular weight and the mass average particle size of the alkyl methacrylate polymer, and the parison obtained by molding the resin composition were evaluated by the following methods.

(1) MFR of polyolefin resin
The MFR of the polyolefin resin was measured according to ASTM D1238. The load was 2.16 kg, and the measurement temperatures were 230 ° C. for propylene polyolefin and 190 ° C. for ethylene polyolefin.

(2) Mass average molecular weight of alkyl methacrylate polymer The mass average molecular weight of the alkyl methacrylate polymer was determined by gel permeation chromatography (Tosoh Corporation) using the tetrahydrofuran (THF) soluble content of the alkyl methacrylate polymer as a sample. Product, trade name: HLC-8220), column (manufactured by Tosoh Corporation, trade name: TSK-GEL SUPER HZM-M), THF was used as an eluent, and mass average molecular weight was determined from a standard polystyrene calibration curve.

(3) Mass average particle diameter of alkyl methacrylate polymer The mass average particle diameter of the alkyl methacrylate polymer was obtained by diluting latex with deionized water as a sample, a particle size distribution meter (manufactured by Matec Applied Sciences, Inc., product) Name: CHDF2000 type).
The measurement conditions were standard conditions recommended by Matec Applied Sciences, USA. That is, a capillary cartridge for particle separation and a carrier liquid were used, and the liquidity: almost neutral, the flow rate: 1.4 ml / min, the pressure: about 4,000 psi (2,600 KPa), and the temperature: 35 ° C. were maintained. In this state, 0.1 ml of a sample diluted with latex to a concentration of about 3% was used for the measurement.
As the standard particle size substance, a total of 12 monodisperse polystyrene particles having a known particle size ranged from 20 to 800 nm were used.

(4) Drawdown characteristics of the parison The parison is extruded using a blow molding machine. When the tip of the parison reaches 1 m from the die, it is cut directly under the die and the mass of the parison is measured. The characteristics were judged. This value is small for materials that have large drawdown and are not suitable for large-scale molding. As an indicator for determining drawdown characteristics, blow molded products with a parison length of 250 g or more under the following blow molding conditions are at least a parison length of 1 m or more. Can be formed without uneven thickness.
(Blow molding conditions)
A single-screw blow molding machine (manufactured by Tahara Seisakusho Co., Ltd.) with a screw diameter of 50 mm was used, and this was molded with a die having a rotation speed of 50 rpm, a barrel temperature of 200 ° C., a parison outer diameter of 60 mm and an inner diameter of 57 mm.

(5) Appearance of parison The surface condition and gloss of the parison obtained above were visually determined according to the following criteria.
○: The surface of the parison is smooth and glossy.
X: The parison surface is rough and not glossy.

(Production Example 1) Production of alkyl methacrylate polymer (B-1) The following monomer mixture was stirred at 10,000 rpm for 6 minutes using a homomixer to obtain an emulsified mixture.
(Monomer mixture)
Isobutyl methacrylate 100 parts Sodium dodecylbenzenesulfonate 1 part Deionized water 300 parts The above emulsified mixture was charged into a separable flask equipped with a thermometer, nitrogen introduction tube, cooling tube and stirring device, and the inside of the container was replaced with nitrogen. . Next, the internal temperature was raised to 60 ° C., and 0.15 part of potassium persulfate was added.

Thereafter, stirring was continued for 2 hours at an internal temperature of 60 ° C. to complete the polymerization, and a latex of an alkyl methacrylate polymer (B-1) was obtained. The alkyl methacrylate polymer (B-1) had a mass average molecular weight of 3 million and a mass average particle diameter of 147 nm.
The obtained latex of alkyl methacrylate polymer (B-1) was dropped into 100 parts of hot water containing 5 parts of calcium acetate to coagulate the latex.
Next, the obtained coagulated product was separated and washed, and then dried at 65 ° C. for 16 hours to obtain an alkyl methacrylate polymer (B-1).

(Production Example 2) Production of alkyl methacrylate polymer (B-2) The amount of potassium persulfate was 1 part. Otherwise in the same manner as in Production Example 1, an alkyl methacrylate polymer (B-2) was obtained.
The alkyl methacrylate polymer (B-2) had a mass average molecular weight of 2 million and a mass average particle diameter of 123 nm.

(Production Example 3) Production of alkyl methacrylate polymer (B-3) 0.1 part of n-octyl mercaptan was added to the monomer mixture. Otherwise in the same manner as in Production Example 1, an alkyl methacrylate polymer (B-3) was obtained.
The alkyl methacrylate polymer (B-3) had a mass average molecular weight of 170,000 and a mass average particle diameter of 147 nm.

(Production Example 4) Production of alkyl methacrylate polymer (B-4) 100 parts of isobutyl methacrylate was changed to 100 parts of n-butyl methacrylate. Otherwise in the same manner as in Production Example 1, an alkyl methacrylate polymer (B-4) was obtained.
The mass average molecular weight of the alkyl methacrylate polymer (B-4) was 3 million, and the mass average particle diameter was 139 nm.

(Production Example 5) Production of alkyl methacrylate polymer (B-5) 0.1 part of n-octyl mercaptan was added to the monomer mixture. Otherwise in the same manner as in Production Example 4, an alkyl methacrylate polymer (B-5) was obtained.
The alkyl methacrylate polymer (B-5) had a mass average molecular weight of 200,000 and a mass average particle diameter of 145 nm.

(Production Example 6) Production of alkyl methacrylate polymer (B'-1) 1 part of n-octyl mercaptan was added to the monomer mixture. Otherwise in the same manner as in Production Example 1, an alkyl methacrylate polymer (B′-1) was obtained.
The alkyl methacrylate polymer (B′-1) had a mass average molecular weight of 10,000 and a mass average particle diameter of 147 nm.

(Production Example 7) Production of alkyl methacrylate polymer (B'-2) 100 parts of isobutyl methacrylate was changed to 100 parts of methyl methacrylate. Otherwise in the same manner as in Production Example 1, an alkyl methacrylate polymer (B′-2) was obtained.
The alkyl methacrylate polymer (B′-2) had a mass average molecular weight of 3 million and a mass average particle diameter of 114 nm.

(Production Example 8) Production of master pellet (M-1) of alkyl methacrylate polymer (B-1) 25 parts of alkyl methacrylate polymer (B-1) obtained in Production Example 1 and linear homopolypropylene 75 parts of pellets (trade name: EA7, MFR: 1.2 g / 10 min, manufactured by Nippon Polychem Co., Ltd.) were blended and hand blended. Next, this blend was melt-kneaded at a barrel temperature of 200 ° C. and a screw rotation speed of 200 rpm using a twin-screw extruder (manufactured by Werner & Pfleiderer, trade name: ZSK30), shaped into a pellet, Master pellet (M-1) of coalescence (B-1) was obtained.

[Examples 1 to 12 and Comparative Examples 1 to 6]
Linear homopolypropylene pellets shown in Tables 1 and 2 as polyolefin resins and alkyl methacrylate polymers (B-1) to (B-5), (B′-1), (B′-1), ( B'-2), master pellet (M-1) or METABRENE A-3000 (trade name) (mixed powder containing polytetrafluoroethylene) manufactured by Mitsubishi Rayon Co., Ltd. at the ratios shown in Table 1 and Table 2. The blended and obtained resin composition was used to evaluate the drawdown characteristics and appearance of MFR and parison. The evaluation results are shown in Tables 1 and 2.

表中の略語
ＦＹ６：日本ポリプロ（株）製ポリプロピレン、商品名；「ノバテックＰＰ」ＦＹ６、ＭＦＲ；２．５ｇ／１０分
ＰＰ：日本ポリケム（株）製直鎖状ホモポリプロピレンのペレット、商品名：「ＥＡ７」、ＭＦＲ：１．２ｇ／１０分
ＰｉＢＭＡ ：ポリイソブチルメタクリレート
ＰｎＢＭＡ ：ポリｎ−ブチルメタクリレート
ＰＭＭＡ ：ポリメチルメタクリレート
ＰＴＦＥ ：ポリテトラフルオロエチレン
Ａ−３０００：三菱レイヨン（株）製メタブレンＡ−３０００（商品名）（ＰＴＦＥを含有する混合粉体）

Abbreviation in the table FY6: Polypropylene manufactured by Nippon Polypro Co., Ltd., trade name; “NOVATEC PP” FY6, MFR; 2.5 g / 10 min PP: Pellet of linear homopolypropylene produced by Nippon Polychem Co., Ltd., trade name: “EA7”, MFR: 1.2 g / 10 min PiBMA: Polyisobutyl methacrylate PnBMA: Poly n-butyl methacrylate PMMA: Polymethyl methacrylate PTFE: Polytetrafluoroethylene A-3000: Metabrene A-3000 (manufactured by Mitsubishi Rayon Co., Ltd.) Product name) (mixed powder containing PTFE)

表中の略語
ＦＹ６：日本ポリプロ（株）製ポリプロピレン、商品名；「ノバテックＰＰ」ＦＹ６、ＭＦＲ；２．５ｇ／１０分
ＥＡ９：日本ポリプロ（株）製ポリプロピレン、商品名；「ノバテックＰＰ」ＥＡ９、ＭＦＲ；０．５ｇ／１０分
ＦＡ３ＥＢ：日本ポリプロ（株）製ポリプロピレン、商品名；「ノバテックＰＰ」ＦＡ３ＥＢ、ＭＦＲ；１０．５ｇ／１０分

Abbreviation in the table FY6: Polypropylene manufactured by Nippon Polypro Co., Ltd., trade name: “Novatech PP” FY6, MFR; 2.5 g / 10 min EA9: Polypropylene produced by Nippon Polypro Co., Ltd., trade name: “Novatech PP” EA9, MFR: 0.5 g / 10 min FA3EB: Polypropylene manufactured by Nippon Polypro Co., Ltd., trade name: “NOVATEC PP” FA3EB, MFR; 10.5 g / 10 min

[Examples 13 to 21 and Comparative Examples 7 to 8]
Polyethylene pellets shown in Table 3 as polyolefin resins and alkyl methacrylate polymers (B-1) to (B-5) or master pellets (M-1) as blends in proportions shown in Table 3 as alkyl methacrylate polymers. The drawdown characteristics and appearance of MFR and parison were evaluated using the obtained resin composition. The evaluation results are shown in Table 3.

表中の略語
５３０５E：（株）プライムポリマー製ＨＤＰＥ、商品名；「ハイゼックス」５３０５E、ＭＦＲ；０．８ｇ／１０分
ＵＲ３５０：日本ポリエチレン（株）製ＬＬＤＰＥ、商品名；「ノバテックＰＥ」ＵＲ３５０；ＭＦＲ；５．０ｇ／１０分

Abbreviations in Table 5305E: Prime Polymer HDPE, trade name; “Hi-X” 5305E, MFR; 0.8 g / 10 min UR350: Nippon Polyethylene Corporation LLDPE, trade name; “Novatech PE” UR350; MFR ; 5.0 g / 10 min

[Examples 22 to 26]
A polyolefin pellet shown in Table 4 as a polyolefin resin, an alkyl methacrylate polymer (B-2) as an alkyl methacrylate polymer and talc as a filler in a proportion shown in Table 4, and the resulting resin composition The MFR and the parison drawdown characteristics and appearance were evaluated. The evaluation results are shown in Table 4.

表中の略語
ＦＹ６：日本ポリプロ（株）製ポリプロピレン、商品名；「ノバテックＰＰ」ＦＹ６、ＭＦＲ；２．５ｇ／１０分
ＵＲ３５０：日本ポリエチレン（株）製ＬＬＤＰＥ、商品名；「ノバテックＰＥ」ＵＲ３５０；ＭＦＲ；５．０ｇ／１０分
タルク：日本タルク（株）製、商品名；「タルクＭＳ」、レーザー回折法Ｄ５０；１４

Abbreviation in the table FY6: Polypropylene manufactured by Nippon Polypro Co., Ltd., trade name; “NOVATEC PP” FY6, MFR; 2.5 g / 10 min UR350: LLDPE manufactured by Nippon Polyethylene Co., Ltd., trade name; “NOVATEC PE” UR350; MFR; 5.0 g / 10 min talc: manufactured by Nippon Talc Co., Ltd., trade name: “talc MS”, laser diffraction method D50; 14

Claims (3)

  For 100 parts by mass of the polyolefin resin (A) having a melt flow rate of 0.1 to 50 g / 10 min, the main component is an alkyl methacrylate unit having 2 to 6 carbon atoms in the alkyl group, and the mass average molecular weight is 15 A non-halogen polyolefin resin composition for blow molding in which 0.01 to 20 parts by mass of an alkyl methacrylate polymer (B) that is 10,000 to 20 million is blended.   The non-halogen polyolefin resin for blow molding according to claim 1, wherein the alkyl methacrylate polymer (B) is obtained by pulverizing a latex of the alkyl methacrylate polymer (B) by a coagulation method or a spray drying method. Composition.   A blow molded product obtained by blow molding the non-halogen polyolefin resin composition for blow molding according to claim 1 or 2.