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Polyformaldehyde composite modified material and preparation method thereof

A technology of composite modification and polyoxymethylene, which is applied in the field of polyoxymethylene composite modified materials and its preparation, can solve the problems of poor aging resistance, etc., and achieve good aging resistance enhancement, aging resistance improvement, and good compatibility Effect

Inactive Publication Date: 2018-03-06
SICHUAN LIZHI JIUCHUANG INTPROP OPERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the relatively poor aging resistance defect of existing polyoxymethylene composite modified materials, and provide a kind of polyoxymethylene composite modified material and preparation method thereof; Polyoxymethylene is compounded, and the nano-calcium carbonate is uniformly dispersed in the polyoxymethylene system. The obtained polyoxymethylene composite modified material has excellent aging resistance, which is beneficial to the application of polyoxymethylene in more fields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) 28 parts of nano-calcium carbonate were treated with 0.5 part of isopropyl tris(isostearyl) titanate;

[0033] (2) Coating the nano-calcium carbonate treated with the coupling agent with 3.5 parts of calcium dodecylsulfonate and 3.5 parts of 2-hydroxy-4-methoxybenzophenone;

[0034] (3) Mix the coated nano-calcium carbonate with 55 parts of polyoxymethylene with a degree of polymerization of 900, and then extrude it in a parallel electric field with an electric field strength of 2.0kv / m and a constant electric field direction to obtain a mixture;

[0035] (4) Mix the mixture obtained in step 3 with 25 parts of polytetrafluoroethylene with a degree of polymerization of 220, 0.4 parts of trimethoxysilane, 2 parts of ultraviolet absorber, and 2 parts of antioxidant, and then extrude , to obtain polyoxymethylene composite modified material.

Embodiment 2

[0037] (1) 15 parts of nano-calcium carbonate were treated with 0.3 part of isopropyl tris(isostearyl) titanate;

[0038] (2) Coating the nano-calcium carbonate treated with the coupling agent with 2.5 parts of calcium dodecylsulfonate and 2.5 parts of 2-hydroxy-4-methoxybenzophenone;

[0039] (3) Mix the coated nano-calcium carbonate with 50 parts of polyoxymethylene with a degree of polymerization of 1200, and then extrude in an electric field with an electric field strength of 2.8kv / m to obtain a mixture;

[0040] (4) Mix the mixture obtained in step 3 with 20 parts of polytetrafluoroethylene with a degree of polymerization of 150, 0.3 parts of trimethoxysilane, 1 part of ultraviolet absorber, and 3 parts of antioxidant, and then extrude , to obtain polyoxymethylene composite modified material.

Embodiment 3

[0042] (1) 20 parts of nano-calcium carbonate are treated with 0.8 part of isopropyl tri(isostearyl) titanate;

[0043] (2) Coating the nano-calcium carbonate treated with the coupling agent with 5 parts of calcium dodecylsulfonate and 5 parts of 2-hydroxy-4-methoxybenzophenone;

[0044] (3) Mix the coated nano-calcium carbonate with 60 parts of polyoxymethylene with a degree of polymerization of 600, and then extrude in a parallel electric field with an electric field strength of 1.5kv / m and a constant electric field direction to obtain a mixture ;

[0045] (4) Mix the mixture obtained in step 3 with 30 parts of polytetrafluoroethylene with a degree of polymerization of 300, 0.5 parts of trimethoxysilane, 3 parts of ultraviolet absorber, and 1 part of antioxidant, and then extrude , to obtain polyoxymethylene composite modified material.

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PUM

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Abstract

The invention discloses a polyformaldehyde composite modified material and a preparation method thereof. The polyformaldehyde composite modified material is prepared from the following raw materials in parts by weight: 20-30 parts of polytetrafluoroethylene, 50-60 parts of polyformaldehyde, 15-20 parts of nano calcium carbonate, 5-10 parts of a modifier, 0.3-0.8 part of a coupling agent, 0.3-0.5 part of a cross-linking agent, 1-3 parts of an ultraviolet light absorber and 1-3 parts of an antioxidant. The nano calcium carbonate subjected to targeted modification is compounded with polyformaldehyde, and the nano calcium carbonate is uniformly dispersed in the polyformaldehyde system, so that the prepared polyformaldehyde composite modified material is excellent in aging resistance, and the application of the polyformaldehyde in more fields is facilitated.

Description

technical field [0001] The invention relates to the field of modified polyoxymethylene materials, in particular to a polyoxymethylene composite modified material and a preparation method thereof. Background technique [0002] Polyoxymethylene is an engineering plastic with excellent performance, a polymer of formaldehyde, and a highly crystalline resin. It has many advantages such as low water absorption, good dimensional stability and gloss, high heat resistance, bending strength, fatigue resistance, excellent wear resistance and electrical properties. POM is widely used in electronics, machinery, instruments, daily light industry, automobiles, building materials, agriculture and other fields. In many new fields of application, such as medical technology, sports equipment, etc., polyoxymethylene also shows a good growth trend. [0003] With the continuous improvement of people's requirements on the aging resistance of materials, polyoxymethylene without aging resistance m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/00C08L27/18C08K13/06C08K9/10C08K9/04C08K3/26C08K5/5415C08J3/28
CPCC08L59/00C08J3/28C08J2359/00C08J2427/18C08K2003/265C08K2201/003C08K2201/011C08L2201/08C08L27/18C08K13/06C08K9/10C08K9/04C08K3/26C08K5/5415
Inventor 舒春柳
Owner SICHUAN LIZHI JIUCHUANG INTPROP OPERATION CO LTD