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Polypropylene resin for hot filling bottles

A polypropylene resin, hot filling technology, applied in the field of polypropylene resin, polypropylene resin for hot filling bottles, can solve the problems of poor rigidity and heat resistance, poor toughness and transparency, etc., achieve good crystallization ability, The effect of improving production efficiency and good crystallization ability

Pending Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Homopolymerized PP has good rigidity and heat resistance, but poor toughness and transparency. Therefore, ethylene / propylene random copolymerization is usually used to improve the toughness and transparency of PP, but its rigidity and heat resistance are significantly worse.

Method used

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  • Polypropylene resin for hot filling bottles
  • Polypropylene resin for hot filling bottles
  • Polypropylene resin for hot filling bottles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0021] The characteristics of the propylene / 1-butene random copolymerized polypropylene resin used in the examples are shown in Table 1, and the melt flow rate is 8-12 g / 10 min.

[0022] The antioxidant in this example uses 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4 hydroxybenzyl)benzene and tris(2,4-di-tert-butyl phenyl)phosphite mixture, the ratio of the two is 1:1; the nucleating agent is 2,2'-methylene-bis(4,6-di-tert-butylphenyl)sodium phosphate; And the agent is calcium stearate. The ratio of polypropylene resin base material to antioxidant, nucleating agent and acid neutralizer is 100:0.15:0.06:0.05.

[0023] In the examples, the propylene / 1-butene random copolymerized polypropylene resin base material is mixed with additives such as antioxidants, nucleating agents, and acid neutralizers, and granulated by melt extrusion to prepare propylene / 1- Butene random copolymerization polypropylene resin.

Embodiment 4

[0026] The melt flow rate of the propylene / 1-butene random copolymerized polypropylene resin used is 3.0g / 10min, and the antioxidant is 1,3,5-trimethyl-2,4,6-tri(3,5-di A mixture of tert-butyl-4-hydroxybenzyl)benzene and tris(2,4-di-tert-butylphenyl)phosphite, the ratio of the two is 1:0.3; the nucleating agent is 2,2'-methylene Base-sodium bis(4,6-di-tert-butylphenyl)phosphate; acid neutralizer is calcium stearate. The ratio of polypropylene resin base material to antioxidant, nucleating agent and acid neutralizer is 100:0.02:0.01:0.01. The steps for preparing the propylene / 1-butene random copolymerized polypropylene resin are the same as in Example 1.

Embodiment 5

[0028] The melt flow rate of the propylene / 1-butene random copolymerized polypropylene resin used is 25.0g / 10min, and the antioxidant is 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylbenzene base) butane and tris(2,4-di-tert-butylphenyl)phosphite, the ratio of the two is 1:8; the nucleating agent is 2,2′-methylene-bis(4, 6-di-tert-butylphenyl) sodium phosphate; acid neutralizer is hydrogenated talc. The ratio of polypropylene resin base material to antioxidant, nucleating agent and acid neutralizer is 100:0.25:0.10:0.08. The steps for preparing the propylene / 1-butene random copolymerized polypropylene resin are the same as in Example 1.

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Abstract

The invention provides a polypropylene resin for hot filling bottles. The polypropylene resin comprises a polypropylene resin base material, an antioxidant, a nucleating agent and an acid neutralizer,wherein the polypropylene resin base material is propylene / 1-butene random copolymer polypropylene, the butene content of the polypropylene resin base material is 1-10wt%, the melting temperature is140-165 DEG C, and the melt flow rate is 3.0-25.0g / 10min. Compared with an existing ethylene / propylene random copolymer polypropylene, the propylene / 1-butene random copolymer polypropylene obtained bythe invention has the advantages of better crystallization capacity, higher heat resistance and rigidity, the thermal deformation temperature reaches 80-90 DEG C, the flexural modulus reaches 1200-1400 MPa, and the polypropylene resin is suitable for injection stretch blow molding and can be applied to hot filling beverage bottles.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a polypropylene resin, in particular to a polypropylene resin for hot-filling bottles. Background technique [0002] After years of rapid development of China's beverage industry, bottled beverages have grown at a double-digit average annual growth rate. At present, polyester (PET) bottle packaging occupies a major share of the domestic beverage packaging market. Due to its high temperature resistance, polypropylene (PP) bottles have excellent appearance in hot filling packaging such as tea, fruit and vegetable juices, sports drinks and health drinks, and gradually replace PET bottles; in addition, it is safe and environmentally friendly. It has excellent performance in terms of safety, sanitation and taste retention of the contents, and gradually replaces PE bottles and enters the field of dairy products. [0003] Hot filling generally uses a temperature of 80°C to 90°C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08K5/00C08K5/13C08K5/526C08K5/098
CPCC08K5/00C08K5/13C08K5/526C08K5/098C08L2207/14C08L2201/08C08L2203/10C08L2205/24C08L2201/10C08L23/14
Inventor 陶红周浩翁向斌张锋袁松柏胡雄王新华陆慧贤
Owner CHINA PETROLEUM & CHEM CORP
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