Check patentability & draft patents in minutes with Patsnap Eureka AI!

Polyformaldehyde composition, low-corrosion polyformaldehyde material and preparation method of low-corrosion polyformaldehyde material

A technology of polyoxymethylene composition and polyoxymethylene material, applied in the field of low-corrosion polyoxymethylene material and its preparation, polyoxymethylene composition, can solve the problems of processing equipment mold scale and corrosion, poor absorption of formaldehyde and formic acid, etc., to reduce The effect of formic acid content, easy industrial application, and simple preparation method

Pending Publication Date: 2022-05-20
CHINA ENERGY GRP NINGXIA COAL IND CO LTD +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that the polyoxymethylene product existing in the prior art has a poor absorption effect on formaldehyde and formic acid, and easily causes mold scaling and corrosion to processing equipment, and provides a polyoxymethylene composition, a low-corrosion polyoxymethylene material and The preparation method of the low-corrosion polyoxymethylene material is obviously lower than that of ordinary polyoxymethylene compositions in terms of formic acid content and corrosion area of ​​carbon steel coupons, and can be used in occasions with extremely high corrosion requirements; moreover, the preparation method is simple and easy to carry out industrialization application

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
  • Polyformaldehyde composition, low-corrosion polyformaldehyde material and preparation method of low-corrosion polyformaldehyde material
  • Polyformaldehyde composition, low-corrosion polyformaldehyde material and preparation method of low-corrosion polyformaldehyde material
  • Polyformaldehyde composition, low-corrosion polyformaldehyde material and preparation method of low-corrosion polyformaldehyde material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add polyoxymethylene copolymer resin, formaldehyde absorbent, polymer formaldehyde absorbent, composite antioxidant, acid absorbent A, acid absorbent B, lubricant and crystallization nucleating agent into the high-speed mixer according to the weight parts shown in Table 1 Premix evenly, and then use twin-screw extruder to melt, knead, extrude and granulate to obtain low-corrosion polyoxymethylene material. Among them, the processing temperature is 225°C, and the screw speed is 100r / min; the twin-screw extruder used is a large-capacity evaporation (multi-stage exhaust) devolatilization twin-screw unit with a length-to-diameter ratio of 65:1. The vacuum degree of each exhaust section of the screw extruder is -0.08MPa.

[0038] In this embodiment, the melting index of the polyoxymethylene resin MC90 used is 9g / 10min; the formaldehyde absorbent is melamine; the polymer formaldehyde absorbent is PA6 and PA1010 copolyamide resin containing hydrazide end groups, powdery, avera...

Embodiment 2

[0040] Add polyoxymethylene copolymer resin, formaldehyde absorbent, polymer formaldehyde absorbent, composite antioxidant, acid absorbent A, acid absorbent B, lubricant and crystallization nucleating agent into the high-speed mixer according to the weight parts shown in Table 1 Premix evenly, and then use twin-screw extruder to melt, knead, extrude and granulate to obtain low-corrosion polyoxymethylene material. Among them, the processing temperature is 225°C, and the screw speed is 100r / min; the twin-screw extruder used is a large-capacity evaporation (multi-stage exhaust) devolatilization twin-screw unit with a length-to-diameter ratio of 65:1. The vacuum degree of each exhaust section of the screw extruder is -0.08MPa.

[0041] In this embodiment, the melting index of polyoxymethylene resin MC90 used is 9g / 10min; The formaldehyde absorbent is methyl melamine; The polymer formaldehyde absorbent is PA6 and PA1010 copolyamide resin containing hydrazide end groups, powdery, av...

Embodiment 3

[0043] Add polyoxymethylene copolymer resin, formaldehyde absorbent, polymer formaldehyde absorbent, composite antioxidant, acid absorbent A, acid absorbent B, lubricant and crystallization nucleating agent into the high-speed mixer according to the weight parts shown in Table 1 Premix evenly, and then use twin-screw extruder to melt, knead, extrude and granulate to obtain low-corrosion polyoxymethylene material. Among them, the processing temperature is 225°C, and the screw speed is 100r / min; the twin-screw extruder used is a large-capacity evaporation (multi-stage exhaust) devolatilization twin-screw unit with a length-to-diameter ratio of 65:1. The vacuum degree of each exhaust section of the screw extruder is -0.08MPa.

[0044] In this embodiment, the melting index of the polyoxymethylene resin MC90 used is 9g / 10min; the formaldehyde absorbent is melamine; the polymer formaldehyde absorbent is PA6 and PA1010 copolyamide resin containing hydrazide end groups, powdery, avera...

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of polyformaldehyde production, and discloses a polyformaldehyde composition, a low-corrosion polyformaldehyde material and a preparation method of the low-corrosion polyformaldehyde material. The polyformaldehyde composition comprises copolymerized polyformaldehyde resin, a formaldehyde absorbent, a macromolecular formaldehyde absorbent, a composite antioxidant, an acid absorbent A, an acid absorbent B, a lubricant and a crystallization nucleating agent. The method for preparing the low-corrosion polyformaldehyde material comprises the following steps: mixing the components in the composition, and melting, mixing and granulating the obtained mixture by using a double-screw extruder to obtain the material. The melt index of the polyformaldehyde material prepared by the method is 2-500g / 10min, and the formic acid content is 0.2-0.4 ppm (mass). The formic acid content and the carbon steel coupon corrosion area of the low-corrosion polyformaldehyde material are obviously lower than those of a common polyformaldehyde composition, and the low-corrosion polyformaldehyde material can be used in occasions with extremely high corrosion requirements; the preparation method is simple and convenient, and industrial application can be easily carried out.

Description

technical field [0001] The invention relates to the technical field of polyoxymethylene production, in particular to a polyoxymethylene composition, a low-corrosion polyoxymethylene material and a preparation method thereof. Background technique [0002] Polyoxymethylene is a linear polymer with no side chains, high density, and high crystallinity, and has excellent comprehensive properties. Polyoxymethylene is a hard and dense material with smooth and shiny surface, which is light yellow or white, and can be used for a long time in the temperature range of -40-100 °C. Its wear resistance and self-lubrication are also superior to most engineering plastics, and it has good oil resistance and peroxide resistance. POM has a tensile strength of 70MPa, low water absorption, stable size, and luster, all of which are better than nylon. POM is a highly crystalline resin, the toughest among thermoplastic resins, with high heat resistance, bending strength and fatigue resistance, an...

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 Applications(China)
IPC IPC(8): C08L59/04C08L77/00C08L77/02C08L77/06C08K5/3492C08K5/134C08K5/526C08K3/22C08K3/26C08K5/098
CPCC08L59/04C08K2003/2206C08L77/00C08L77/02C08L77/06C08K5/34922C08K5/1345C08K5/526C08K3/22C08K3/26C08K5/098
Inventor 方伟周涛杨军张彩霞金政伟乃国星袁炜王启李瑞龙孙亚楠陈星袁生斌陈海华任晓东冯金
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com