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Polyolefin resin composition, molded product thereof and preparation of polyolefin resin composition
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A technology of polyolefin resin and manufacturing method, which is applied in the field of polyolefin resin composition and its molded products, and can solve problems that need to be further improved
Inactive Publication Date: 2011-05-04
SUMITOMO CHEM CO LTD
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Problems solved by technology
However, even in the polyolefin resin compositions described in the aforementioned patent publications, etc., in addition to appearance and mechanical strength, long-term durability in an environment affected by oxygen, heat, and light is maintained, especially light resistance over a long period of time. In terms of stability, it needs to be further improved
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Embodiment 1
[0235] (1) Manufacture of glass fiber-containing polyolefin resin composition (GFPP-1)
[0236] Using rovings of glass fibers (C-1) bundled with 0.36% by weight of a sizing agent, propylene autopolymers (A-1), (A-2), modified block copolymers (B-1), Antioxidants (G-1), (G-2), and (G-3), according to the method described in JP-A-3-121146, prepared glass fiber-containing polyolefin resins with a glass fiber content of 40% by weight Granules (length 9 mm) of the composition (GFPP-1). At this time, the impregnation temperature was 270°C and the pulling speed was 33 ft / min.
[0237] The content of each component in the resin composition (GFPP-1) is shown below, respectively.
[0238] Propylene self-polymer (A-1): 48 parts by weight
[0239] Propylene self-polymer (A-2): 10 parts by weight
[0240] Modified block copolymer (B-1): 2 parts by weight
[0241] Fibrous filler (C-1): 40 parts by weight
[0242] (The total amount of (A-1), (A-2), (B-1) and (C-1) is 100 parts by weigh...
Embodiment 2
[0261] Except for using the photostabilizer (D-2) instead of the photostabilizer (D-1), the method described in the section "(2-1) Photostabilizer-containing masterbatch" was carried out in the same manner. , Prepare a masterbatch (MB-1') containing a light stabilizer. A polyolefin resin composition was produced by the same method as that described in Example 1 except that this master batch (MB-1') was used as a master batch containing a light stabilizer. Furthermore, a molded article (test piece) composed of the same composition was produced, and its physical property measurement and light resistance stability test (600 hours) were performed. The results are shown in Table 1.
Embodiment 3
[0263] In addition to using the benzoate compound (E-2) instead of the benzoate compound (E-1), the same as in the item of "(2-2) Master batch containing a benzoate compound" The method described was carried out in the same manner, and a masterbatch (MB-2') containing a benzoate compound was prepared. As a masterbatch containing a light stabilizer, the above-mentioned masterbatch (MB-1') was used, and further, as a masterbatch containing a benzoate compound, a masterbatch (MB-2') was used. The same method as described in Example 1 was used to produce a polyolefin resin composition. Furthermore, a molded article (test piece) composed of the same composition was produced, and its physical property measurement and light resistance stability test (600 hours) were performed. The results are shown in Table 1.
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Abstract
Disclosed is a polyolefin resin composition containing 39.5-98.5 parts by weight of the component (A) defined below, 0.5-10 parts by weight of the component (B) defined below, 1-60 parts by weight of the component (C) defined below, 0.05-1 part by weight of the component (D) defined below, 0.05-1 part by weight of the component (E) defined below, and 0.001-10 parts by weight of the component (F) defined below (provided that the total of the components (A), (B) and (C) is 100 parts by weight). Component (A): a polyolefin resin Component (B): a modified polyolefin resin obtained by graft modification of a polyolefin resin using a modifying agent selected from unsaturated carboxylic acids and unsaturated carboxylic acid derivatives, wherein the graft modification amount is 0.5-10% by weight and the melt flow rate as measured at a load of 21.2 N and a temperature of 230 DEG C is 20-190 g / 10 min Component (C): a fibrous filler Component (D): a hindered amine light stabilizer having a molecular weight of not less than 1,000 Component (E): a benzoate compound represented by a specific structural formula Component (F): a white pigment having a Mohs hardness of 1-6.
Description
technical field [0001] The present invention relates to a polyolefin resin composition and its molded articles. More specifically, it relates to a polyolefin resin composition which is excellent in long-term durability in an environment affected by oxygen, heat, and light, in particular, excellent in light resistance stability over a long period of time, in addition to good appearance and excellent mechanical strength, and its molded products. Background technique [0002] Polyolefin resin is a relatively inexpensive polymer material excellent in mechanical strength, heat resistance, moldability, chemical resistance, etc., so it is widely used in various fields such as injection molded products. For example, JP-A-2004-1499 describes a polypropylene resin pellet used in a vehicle front structure as a means of improving the durability of a vehicle front structure in a metal contact environment, Glass fiber reinforced polypropylene resin particles containing specific amount o...
Claims
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Application Information
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