Toughened aging-resistant polyolefin composition and preparation method thereof
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A composition and polyolefin technology, applied in chemical instruments and methods, synthetic resin layered products, lamination, etc., can solve problems such as poor interlayer adhesion, achieve low water absorption, and the preparation method is simple and easy, The effect of good patience
Active Publication Date: 2020-04-21
SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
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[0004] However, the composite materials prepared by the above method often have the problem of poor interlayer adhesion. In addition, the compatibility and melt index of resin materials can easily affect the composite effect of the material. A polyolefin composition with good toughness, transparency and aging resistance, obviously of positive practical significance
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[0031] Component A: Weigh 70g homopolypropylene HP500N (China Sea Shell Petrochemical Co., Ltd.), 30g linear low-density polyethylene DFDC 7050 (Yangzi Petrochemical Company), 1g vinyltriethoxysilane A151 (Nanjing Youpu Chemical Co., Ltd. company), 2g HX-3; 1,3:2,4-bis(3,4-dimethylbenzylidene)-D-sorbitol nucleating agent 3988 (Beijia Fine Chemical Polymer Materials Co., Ltd.), 0.1g antioxidant 2,6-tertiary butyl-4-methylphenol (Beijing Institute of Addition Auxiliaries), 0.2g light stabilizer bis(2,2,6,6-tetramethyl-4- Piperidinyl) sebacate (Beijing Institute of Addition Auxiliaries).
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Abstract
The invention discloses a toughened aging-resistant polyolefin composition. The polyolefin composition is composed of a composition A and a composition B. The composition A comprises the following components: 10-100 parts of homo-polypropylene, 1-50 parts of linear low-density polyethylene, 0.1-5 parts of a nucleating agent, 0.1-5 parts of silane, and 0.01-1 part of an additive. The composition Bcomprises the following components in parts by weight: 10 to 100 parts of homo-polypropylene, 1 to 50 parts of linear low-density polyethylene, 0.1 to 5 parts of a nucleating agent, 0.1 to 5 parts ofsilane, 0.05 to 5 parts of an initiator and 0.01 to 1 part of an additive. According to the invention, the special initiator is selected; before lamination, the initiator is not easy to decompose, lowin activity and not prone to reaction; and in a lamination step, the initiator in the B-layer composition begins to act at high temperature to enable the A-layer composition and the B-layer composition to undergo silane crosslinking at the same time, and the two compositions are also tightly combined, so a two-layer material with better interlayer bonding force is obtained.
Description
technical field [0001] The invention relates to a toughened and aging-resistant polyolefin composition and a preparation method thereof, belonging to the technical field of polyolefin functional masterbatch. Background technique [0002] Polypropylene PP is one of the five general-purpose plastics. It has abundant sources of raw materials, is cheap, easy to process and shape, and has excellent comprehensive performance, so it has been widely used. As a semi-crystalline polymer material, PP has excellent properties such as high rigidity, corrosion resistance, and electrical insulation. Polypropylene changes rapidly from the glass state to the molten state, the melting range is narrow, the high elastic state range is small, and the melt strength is low. Therefore, its mechanical properties are low, and the tensile strength is only 30MPa, which limits the application of polypropylene. . [0003] In view of the above technical problems, in the prior art, composite materials ar...
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