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Toughening compound additive of polypropylene resin and preparation method of polypropylene anti-impact resin

A technology of polypropylene resin and compound additives, which is applied in the field of synthetic resins, can solve the problems of high difficulty, reduced impact strength, and low impact resistance of high-fluidity polypropylene, and achieve strong adaptability, maintain flexural modulus, and improve The effect of impact strength

Active Publication Date: 2018-07-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the impact resistance of high-fluidity polypropylene is low, which cannot meet the increasing requirements of the downstream market. When the MI of co-polypropylene increases, the impact strength will decrease, which cannot meet the requirements of balance between rigidity and impact strength of PP resin.
[0004] However, increasing the ethylene content through the polymerization process to form an ethylene-propylene rubber phase to improve the impact strength of the resin has problems such as high requirements for the device, great difficulty, easy caking of the reactor, and shutdown of the device.

Method used

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  • Toughening compound additive of polypropylene resin and preparation method of polypropylene anti-impact resin
  • Toughening compound additive of polypropylene resin and preparation method of polypropylene anti-impact resin
  • Toughening compound additive of polypropylene resin and preparation method of polypropylene anti-impact resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 50g benzoate and 35g lithium phosphate are put into the solution that is made up of butanone 300ml and ethanol 200ml and handle (stirring and impregnating after 2 hours filter dry, 60 ° of ℃ oven dry 2 hours), then benzoate and Lithium phosphate is taken out to obtain a composite toughening agent.

[0037] 120g of primary antioxidant 3-(3,5-bis-tert-butyl-4-hydroxycyclohexyl) propionate, 180g of secondary antioxidant (2,4-bis-tert-butylphenol) phosphite, cool 50 g of slip agent calcium stearate and 85 g of composite toughening agent were uniformly mixed to obtain 435 g of toughening composite additive of polypropylene resin.

[0038] With the polypropylene carrier resin K9928H of 3000g, polypropylene carrier resin K9026, polypropylene carrier resin HHP4, polypropylene carrier resin AZ564 and polypropylene carrier resin AP03B respectively with the toughening composite additive of 20g by high mixer at normal temperature (without heating ) are mixed evenly, and then granu...

Embodiment 2

[0043] The difference from Example 1 is that the addition of the toughening compound additive is replaced by 20g to 15g, the impact performance is greatly improved, and the flexural modulus is smaller. The results are shown in Table 3 (15g addition):

[0044] table 3

[0045]

Embodiment 3

[0047] The difference from Example 1 is that the addition of the toughening compound additive is replaced by 20g to 30g, the impact performance is greatly improved, and the flexural modulus is smaller. The results are shown in Table 4 (30g addition):

[0048] Table 4

[0049]

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Abstract

The invention relates to a toughening compound additive of polypropylene resin. The toughening compound additive comprises: a main antioxidant, an auxiliary antioxidant, a slipping agent and a composite toughening agent, wherein the composite toughening agent consists of benzoate and lithium phosphate treated by butanone and ethanol and then dried; the weight ratio of the benzoate to lithium phosphate is (50-70):(20-35); based on the additive, the added amount of the main antioxidant is 20-40%, the added amount of the auxiliary antioxidant is 25-45%, the added amount of the slipping agent is 10-25%, and the added amount of the composite toughening agent is 10-25%. The invention also relates to a preparation method of polypropylene anti-impact resin. Compared with a traditional method of improving the impact strength of resin by increasing the ethylene content by polymerization and generating an ethylene-propylene rubber phase, the method is easy to operate, does not need additional equipment or process modification, and is effective to different devices and processes.

Description

technical field [0001] The invention relates to the field of synthetic resins, in particular to a toughening composite additive for polypropylene resin and a preparation method for polypropylene impact-resistant resin. Background technique [0002] Polypropylene injection molding products have been widely used in packaging, transportation, home appliances, automobiles, offices, daily consumer goods, medical products and other fields. In recent years, with the improvement of polypropylene (PP) production process, especially the improvement of new high-efficiency catalyst and polymerization process, great progress has been made in the development and application of high-fluidity polypropylene products. [0003] The use of high-fluidity polypropylene can make injection products easy to form and process, reduce injection defects and waste rates, reduce energy consumption, shorten the molding cycle of products, and increase product output. However, the impact resistance of high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/02C08K5/098C08K3/32C08K5/134C08K5/526C08L23/12
CPCC08K3/32C08K5/098C08K5/1345C08K5/526C08K13/02C08L2201/08C08L23/12
Inventor 马进胡晓华武世波张璐莫明杨帆周豪胡斌贺彩虹
Owner PETROCHINA CO LTD
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