Polar polypropylene graft and preparation method thereof

A polypropylene grafting and polar technology, which is applied in the field of polar polypropylene grafts and their preparation, can solve the problems of inability to meet the needs of operation and environmental protection, inability to completely avoid the use of styrene, difficulty in batching, etc. Degradation problem and the effect of low grafting rate, increasing polarity and low degree of degradation

Active Publication Date: 2018-06-22
GUANGZHOU LUSHAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can reduce side reactions while maintaining the grafting rate, the auxiliary monomers introduced often have serious pungent odors (such as styrene, acrylic acid, etc.), which cannot meet the needs of operations and environmental protection in actual production.
In patent CN104804143A, it is proposed to add a small amount of initiator in multiple batches, and maintain a smooth reaction by controlling the free radical concentration to reduce side reactions. The disadvantage of this method is that the operation is cumbersome, it is difficult to batch, and in addition, the use of styrene cannot be completely avoided.

Method used

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  • Polar polypropylene graft and preparation method thereof
  • Polar polypropylene graft and preparation method thereof

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preparation example Construction

[0032] A preparation method of a polar polypropylene graft, comprising:

[0033] Mixing step: uniformly mix the PP resin raw material with the formulated amount and the initiator monomer with the formulated amount to obtain the mixture;

[0034] Melting reaction step: the mixture is placed in the grafting equipment for melting reaction, the grafting equipment includes a mixing zone (pre-reaction zone), a grafting zone (main reaction zone) and a termination zone, wherein the mixing zone control temperature is 130 -200°C, the control temperature in the grafting area is 150-230°C, and the control temperature in the termination area is 150-220°C; add the formulated amount of initiator, polar monomer, and grafting aid in the mixing area, and add the formula in the termination area amount of antioxidant, extruded and granulated to obtain polar polypropylene grafts.

[0035] As a further embodiment, in the melting reaction step, the grafting equipment is a single-screw extruder, the...

Embodiment 1

[0039] A preparation method of a polar polypropylene graft, comprising:

[0040] Add 100 parts of homopolymerized PP resin raw material (melt index 11g / 10min (230°C, 2.16kg)) and 2.5 parts of butyl peroxymaleate into the mixer, stir at 1000r / min, and mix for 5 minutes. Put the uniformly mixed materials into a φ65 twin-screw extruder, the screw length-to-diameter ratio is 36:1, the temperature of the three reaction zones is 190°C, and the screw speed is 300rpm. In the end zone of the extruder, 0.3 parts of antioxidant 215 was added by metering, extruded and granulated to obtain the polar PP graft of the present invention.

Embodiment 2

[0042] A preparation method of a polar polypropylene graft, comprising:

[0043] Add 100 parts of homopolymer PP resin raw material (melt index 11g / 10min (230°C, 2.16kg)) and 5 parts of butyl peroxymaleate into the mixer, stir at 1000r / min, and mix for 5 minutes. Put the uniformly mixed materials into a φ65 twin-screw extruder, the screw length-to-diameter ratio is 36:1, the temperature of the three reaction zones is 190°C, and the screw speed is 300rpm. In the end zone of the extruder, 0.3 parts of antioxidant 215 was added by metering, extruded and granulated to obtain the polar PP graft of the present invention.

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Abstract

The invention discloses a polar polypropylene graft. The polar polypropylene graft comprises the following components in parts by weight: 100 parts of a PP resin raw material, 0.1-5 parts of an initiator monomer; 0-2 parts of an initiator, 0-5 parts of polar monomers, 0-5 parts of a grafting assistant and 0.05-1 part of an antioxidant. The invention also discloses a preparation method of the polarpolypropylene graft. The polar polypropylene graft provided by the invention is prepared by introducing an initiator monomer having peroxy groups, unsaturated double bonds and polar groups at the same time through a melt reaction extrusion method. The obtained polypropylene graft has a relatively high polar group grafting rate, can effectively reduce common degradation side reactions in a polypropylene melt grafting process, and is beneficial to improving the mechanical properties of products. The method is suitable for a prior production technological process and can be used for batch production.

Description

technical field [0001] The invention relates to a polypropylene graft, in particular to a polar polypropylene graft and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a very important general-purpose plastic with excellent physical properties, and has been widely used in various aspects of production and life such as construction, energy, chemical industry, and transportation. However, the low surface energy of PP makes it difficult for most adhesives, inks, coatings, etc. to adhere to its surface, and its non-polar chemical properties also make it difficult to be uniform with common polar fillers (such as glass fiber, minerals, etc.). Blend for further strength. [0003] Grafting modification is a common method to increase the polarity of PP, among which free radical-induced grafting and melt reaction extrusion are the most common methods. There are a large number of tertiary carbon and hydrogen atoms in the PP structure, and the tertiar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F222/20C08K5/134C08K5/526
CPCC08F255/02C08K5/1345C08K5/526C08F222/20
Inventor 刘嘉贤王明辉李煦田唐舫成汪加胜
Owner GUANGZHOU LUSHAN NEW MATERIALS
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