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A kind of in-situ core-shell structure toughened polyoxymethylene and its preparation method

A core-shell structure, polyoxymethylene technology, applied in the field of material engineering, can solve the problems of unsatisfactory toughening effect, high cost, poor coating effect of polyoxymethylene material, etc., to improve market competitiveness, easy operation, and reduce material cost. Effect

Active Publication Date: 2018-01-12
重庆生益行新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an in-situ core-shell structure toughened polyoxymethylene and its preparation method, aiming to solve the poor coating effect of polyoxymethylene materials in the "sea-island" microstructure , high cost, unsatisfactory toughening effect and other technical problems

Method used

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  • A kind of in-situ core-shell structure toughened polyoxymethylene and its preparation method
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  • A kind of in-situ core-shell structure toughened polyoxymethylene and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Using the proportions in Table 2, prepare polyoxymethylene and label them respectively.

[0047] Table 2 Experimental ratio table of POM / TPU / AS

[0048] sample code

POM (parts by mass)

AS (parts by mass)

TPU (parts by mass)

T-0

70

15

0

T-5

70

15

5

T-10

70

15

10

T-15

70

15

15

[0049] Concrete preparation steps are:

[0050] 1) Blend and extrude the toughened masterbatch raw materials in a co-rotating twin-screw extruder to form a toughened masterbatch melt; wherein, the temperature of each heating zone from the feeding port to the die is set to 110 °C, 150°C, 170°C, 180°C, 210°C, 210°C, 210°C, 210°C, 210°C, 210°C and 210°C; the toughened masterbatch raw materials are AS and TPU (T-0 does not add );

[0051] Then pass the toughened masterbatch melt through a water tank with built-in cooling water to cool it, and then send it to a pelletizer for pelletizing to obtain toughened mast...

Embodiment 2 Embodiment 12

[0063] The preparation methods of Example 2 to Example 12 are the same as that of Example 1, except that the thermoplastic resins used are different and the specific proportions are different. Wherein, in addition to the thermoplastic resin and TPU, the toughened masterbatch raw materials in the fourth, eighth and twelfth examples also include an antioxidant. See Table 4 for details.

[0064] Table 4 Embodiment 2 to Embodiment 12 Raw Material Proportion Table

[0065]

[0066]

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Abstract

The invention discloses in-situ core-shell structure toughened polyformaldehyde and a preparation method thereof. The in-situ core-shell structure toughened polyformaldehyde is prepared from the following raw materials in parts by mass: 70 parts of POM (polyacetal), 5 to 15 parts of thermoplastic resin and 5 to 15 parts of TPU (thermoplastic polyurethane). The preparation method of the polyformaldehyde totally comprises two steps that 1) toughened master batch raw materials are blended and extruded in a homonymous double-screw extruding machine to form toughened master batch melt; then, the melt passes through a water tank containing cooling water to be cooled; next, the cooled melt is conveyed into a dicing cutter for particle cutting; drying is performed to obtain a toughened master batch; 2) the POM and the toughened master batch are blended and extruded in the homonymous double-screw extruding machine; then, the melt passes through the water tank containing the cooling to be cooled; next, the cooled melt is conveyed into the dicing cutter for particle cutting; drying is performed to obtain the in-situ core-shell structure toughened polyformaldehyde. The prepared product has the advantages that the coating effect in the molecule level is good; the cost is low; the toughening effect is good. The preparation method has few steps, and the operation is simple.

Description

technical field [0001] The invention belongs to the technical field of material engineering, and in particular relates to an engineering plastic, in particular to an in-situ core-shell structure toughened polyoxymethylene and a preparation method thereof. Background technique [0002] Polyoxymethylene, also known as polyoxymethylene, English name polyoxymethylene, English abbreviation POM, is a molecular main chain containing -CH 2 The highly crystalline linear polymer of O-chain is a kind of engineering plastic with excellent comprehensive performance, and it is one of the top five engineering plastics in the world. Because the hardness, rigidity, and strength of POM are similar to metal, it is also known as "Duragon" and "Saigang". [0003] Although polyoxymethylene has excellent comprehensive properties and is widely used in many fields, there are still some shortcomings in the performance of polyoxymethylene: the notched impact strength of polyoxymethylene is low and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L59/00C08L25/12C08L75/04C08L23/08
CPCC08L59/00C08L2205/03C08L25/12C08L75/04C08L23/0869
Inventor 王选伦杨文青尹皓李又兵
Owner 重庆生益行新材料科技股份有限公司
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