A polypropylene resin composition which has satisfactory moldability in injection molding, is excellent in flow mark properties during molding and in weld appearance, and is suitable for producing injection-molded articles such as exterior automotive parts; and a moldability modifier for use in the composition. The moldability modifier for polypropylene resins comprises at least one of a propylene homopolymer and a propylene random polymer which have a die swell ratio of from 1.5 to 2.5 and a ratio of the weight-average molecular weight (Mw) to the number-average molecular weight (Mn), as measured by gel permeation chromatography (GPC) (Q value: Mw/Mn), of 7 to 13. The polypropylene resin composition is obtained by mixing the modifier with a propylene/ethylene block copolymer, an ethylene or styrene elastomer, an inorganic filler, etc.

Moldability modifier for polypropylene resin and polypropylene resin composition containing the same

PROBLEM TO BE SOLVED: To provide a propylene resin composition having a good flexibility and transparency and shows no stickiness. SOLUTION: A propylene resin composition comprises a polypropylene component and a copolymer component of propylene and ethylene. Here, (I) components eluted at below 90 deg.C account for from 50 to 99 wt.% of the total composition, components eluted at 90 deg.C or higher account for from 50 to 1 wt.% of the total composition and components eluted at below 0 deg.C account for from 10 wt.% or smaller of the total composition, determined by temperature rising elution fractionation using o-dichlorobenzene solvent. Furthermore, (II) the ethylene unit content in the components eluted at below 90 deg.C is 4 wt.% or larger but smaller than 20 wt.%, and the propylene unit content in the components eluted at 90 deg.C or higher is from 97 to 100 wt.%.

Propylene resin composition, preparation thereof and use thereof

The invention discloses a water-soluble polymer oil displacement agent and a synthesis method thereof. The synthesis method comprises the following steps of: placing hydrophobic monomers, namely N-allyl morpholinium (AMPL) and alkylphenol ethoxylate (OP-10) into a beaker, adding a small amount of distilled water, stirring till a solution is transparent, and transferring into a three-mouth flask; mounting a nitrogen tube and a stirring device in the three-mouth flask, and adding the distilled water; adding acrylamide (AM) and acrylic acid (AA), and stirring till complete dissolution; regulating the pH value to 7 with 20% by weight of NaOH solution; and introducing N2, performing constant-temperature reaction for a period of time, adding ammonium persulfate ((NH4)2S2O8) and sodium hydrogen sulfite (NaHSO3), and reacting for 8h to obtain a corresponding polymer. The polymer oil displacement agent shows good viscosity-increasing property, temperature resistance, anti-salt property and anti-shearing property, and can effectively improve the simulation crude oil recovery rate by 10.4%.

AM (acrylamide)/NaAA (sodium acrylic acid)/AMPL (N-allyl morpholinium) ternary copolymer oil displacement agent and synthesis method thereof

PROBLEM TO BE SOLVED: To obtain a film excellent in transparency, adaptability for packaging machine, package finishing, cutting properties, heat sealing properties, sticking strength by forming a base material layer out of a specified polypropylene resin, hydrogenated resins, etc, forming a surface layer out of a specified ethylene-vinyl acetate copolymer, and making a crystal orientation coefficient a specified value SOLUTION: A base material layer is formed of a composition of 90-20 wt% of a polypropylene resin which is formed from a polypropylene component and a propylene-ethylene random copolymer and has characteristics of 10-40 mole % of an ethylene content, 4-16 of weight average molecular weight/number average molecular weight, and 20-53 wt% (below 20°C), 20-75 wt% (100°C or above) 5-50 wt% of an eluted component, 5-40 wt% of a crystalline polypropylene resin, and 5-40 wt% of a hydrogenated resins, and both surface layers are formed from an ethylene-vinyl acetate copolymer of 5-20 wt% of a monomer content based on vinyl acetate, and the crystal orientation coefficient in the extrusion direction by the X-ray diffraction method of a laminated film is made 025 or below COPYRIGHT: (C)2001,JPO

Film for stretch packaging

PROBLEM TO BE SOLVED: To provide a molded item such as a film, a sheet, a tube, a hose, an injection-molded article or a laminated product that is improved in stickiness, the change in external appearance with time and the like resulting from a propylene-based soft resin and is excellent in the balance among transparency, flexibility, heat resistance and the like. SOLUTION: The molded item is composed of a resin composition that comprises a propylene-ethylene copolymer having an ethylene unit content of at most 20 mol% and an [EEE] triad chain fraction f EEE of at most 0.1 mol%, and gives fractionated components by the temperature-raising elution fractionation method (TREF) that satisfy the requirements below. The component 1 which is soluble at 0°C accounts for 10-80 mass%; the component 2 which is eluted at a temperature higher than 0°C and not higher than 70°C accounts for 10-60 mass%; the component 3 which is eluted at a temperature higher than 70°C and lower than 100°C accounts for 5-50 mass%; and the component 4 which is eluted at a temperature of 100°C or higher accounts for 0-30 mass%, provided that (the component 1)+(the component 2)+(the component 3)+(the component 4)=100 mass%. COPYRIGHT: (C)2008,JPO&INPIT

Molded item composed of propylene resin composition

PROBLEM TO BE SOLVED: To obtain a propylene-based resin having excellent flexibility, transparency and heat resistance, and also excellent in moldability. SOLUTION: This propylene-based resin has 0.01-10 g/10 min melt flow rate, 10-40 mol.% of ethylene content, 6-16 of a ratio (Mw/Mn) of weight-average molecular weight Mw to number-average molecular weight Mn determined by gel permeation chromatography(GPC), and in an elution curve (Figure 1) fractionated by a temperature increasing eluting fractionation method and expressed by the axis of abscissas as elution temperatures ( deg.C) and the axis of ordinates as integrated weight connection (wt.%) of the eluted component, and amount of the component (A-component) eluted below 20 deg.C is 20-53 wt.%, an amount of the component (B-component) eluted from 20 deg.C to below 100 deg.C is 20-75 wt.% and an amount of the component (C-component) eluted above 100 deg.C is 5-50 wt.%, where the total of the components A, B and C is 100 wt.%, a weight ratio of the B-component to the A-component (B/A) is more than 0.8, and a peak top temperature in the C-component is >=120 deg.C.

Kitajima Yoshiyuki

Papers

Propylene-based resin