Unlock instant, AI-driven research and patent intelligence for your innovation.

High thermal stable polyoxymethylene resin and preparation method thereof

A technology of polyoxymethylene resin and oxidized methylene resin, which is applied in the field of high thermal stability polyoxymethylene resin and its preparation, and achieves the effect of being conducive to widespread promotion and good thermal stability

Active Publication Date: 2015-07-15
李云勇 +2
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] [Ca] 2 Al(OH) 6 ] n X zH 2 Relevant reports on the application of O in polyoxymethylene resin

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High thermal stable polyoxymethylene resin and preparation method thereof
  • High thermal stable polyoxymethylene resin and preparation method thereof
  • High thermal stable polyoxymethylene resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of embodiment 1 resin of the present invention

[0041] First, 100 parts by weight of polyoxymethylene matrix resin, 0.2 parts by weight of formaldehyde absorbent, 0.2 parts by weight of formic acid absorbent, 0.5 parts by weight of antioxidant, [Ca 2 Al(OH) 6 ] 2 CO3 4H 2 0.2 parts by weight, 0.15 parts by weight of lubricant and 0.2 parts by weight of crystallization nucleating agent and add in the high-speed mixer for pre-mixing, then add the end-capping agent of 0.2 parts by weight in the high-speed mixer and continue mixing, finally adopt double The screw extruder performs melt mixing and extrusion granulation, the screw speed is 300r / min, and the processing temperature is 170-235°C. The melting index of polyoxymethylene matrix resin is 9.0g / 10min, and the content of unstable terminal group is 8800mg / kg; the formaldehyde absorbent is powdered melamine resin with a particle size of 200 mesh, and is insoluble in hot water at 70°C; The formi...

Embodiment 2

[0048] The preparation method of embodiment 2 resin of the present invention

[0049] First, 100 parts by weight of polyoxymethylene matrix resin, 1 part by weight of formaldehyde absorbent, 0.3 part by weight of formic acid absorbent, 0.8 part by weight of antioxidant, [Ca 2 Al(OH) 6 ] 2 HPO 4 3.5H 2 0.9 parts by weight, 0.5 parts by weight of lubricant and 0.3 parts by weight of crystallization nucleating agent are added in the high-speed mixer for pre-mixing, then add 1.8 parts by weight of end-capping agent in the high-speed mixer to continue mixing, and finally adopt twin-screw The extruder performs melt mixing and extrusion granulation, the screw speed is 150r / min, and the processing temperature is 170-220°C. The melting index of the polyoxymethylene matrix resin is 2.5g / 10min, and the content of unstable end groups is 6800mg / kg; the formaldehyde absorbent is powdered melamine resin with a particle size of 120 mesh, and is insoluble in hot water at 65°C; The formic ...

Embodiment 3

[0055] The preparation method of embodiment 3 resin of the present invention

[0056] First, 100 parts by weight of polyoxymethylene matrix resin, 1.5 parts by weight of formaldehyde absorbent, 1 part by weight of formic acid absorbent, 1.5 parts by weight of antioxidant, [Ca 2 Al(OH) 6 ] 2 CO 3 4H 2 O2.0 parts by weight, 0.3 parts by weight of lubricant and 1 part by weight of crystallization nucleating agent are added in the high-speed mixer for pre-mixing, then add 4.0 parts by weight of end-capping agent in the high-speed mixer to continue mixing, and finally use twin-screw The extruder performs melt mixing and extrusion granulation, the screw speed is 400r / min, and the processing temperature is 165-220°C. The melting index of polyoxymethylene matrix resin is 27.0g / 10min, and the content of unstable terminal group is 5700mg / kg; the formaldehyde absorbent is powdered melamine resin with a particle size of 100 mesh, and is insoluble in hot water at 80°C; The formic acid...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melt flow indexaaaaaaaaaa
particle size (mesh)aaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a high thermal stable polyoxymethylene resin which is prepared by the following raw materials by weight: 100 parts of polyoxymethylene, 0.05-3 parts of a formaldehyde absorbent, 0.05-1 part of a formic acid absorbent, 0.05-2 parts of an antioxidant, 0.01-5 parts of a capping agent, 0.05-2 parts of a lubricant, 0.01-2 parts of a nucleating agent and 0.01-3 parts of [Ca2Al (OH) (6)] nX. zH2O; wherein X is a negative ion selected from the group consisting of OH<->, CO3<2->, HPO4<2->, SO4<2-> or Cl<->, n is equal to the valence of X; and z is 0-12. The invention also provides a preparation method of the resin. The polyoxymethylene resin has good thermal stability, can be used in application occasions having extremely harsh requirements on thermal stability, and is conductive to wide popularization of resin.

Description

technical field [0001] The invention relates to a polyoxymethylene resin with high thermal stability and a preparation method thereof, and belongs to the technical field of thermal stability and processing of polyoxymethylene polymers. Background technique [0002] Polyoxymethylene, also known as polyoxymethylene, is a main chain containing (-CH 2 -O–) chain link linear polymer. Polyoxymethylene is a thermoplastic engineering plastic with excellent comprehensive properties. It was first industrialized by Du Pont Company of the United States in 1959, and then it is easy to process and shape, and the raw materials are cheap and easy to obtain, especially its unique mechanical properties, oil resistance, Chemical resistance, low water absorption and good thermal and electrical properties are used to replace non-ferrous metals and alloys, and are widely used in many fields such as automobiles, electronic and electrical industries, various precision machinery and hardware buildi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L59/00C08L63/02C08K13/02C08K5/134C08K5/20C08K5/1515C08K3/26B29C47/92B29C48/92
CPCB29C2947/92228B29C47/92B29C2947/92514B29C2947/92485B29C47/6087B29C2947/92895B29C2947/9259B29C2947/92885B29C2947/92704B29C2947/926B29C48/40B29C48/625B29C48/92B29C2948/92228B29C2948/92485B29C2948/92514B29C2948/9259B29C2948/926B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 李云勇周涛程晔华
Owner 李云勇