Supercharge Your Innovation With Domain-Expert AI Agents!

Polyamide composition and preparation method thereof

A technology of composition and polyamide, which is applied in the field of polyamide composition and its preparation, can solve the problems affecting whiteness, etc., and achieve the effect of good product color and maintaining combustion characteristics

Active Publication Date: 2017-01-04
CHINA PETROLEUM & CHEM CORP
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to address the need for melt blending of traditional polyamide resins and nucleating agents, which seriously affects the whiteness, and there is easily separated powder after mixing with the release agent, or it can form a powder-free coating but affects the combustion characteristics To provide a polyamide resin composition that can be easily mixed with a nucleating agent and mixed with a release agent to form a powder-free coating and maintain the combustion characteristics of the polyamide 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
  • Polyamide composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] see figure 1 , a preparation method of a polyamide resin composition, comprising the following steps:

[0041] S110, mixing the nucleating agent and the polyamide monomer to obtain a mixed liquid.

[0042] Wherein, the nucleating agent is nylon 22, silicon dioxide or talcum powder.

[0043] In this embodiment, the mass percentage of the nucleating agent in the mixed liquid is 1%-10%.

[0044] Preferably, the mass percent content of the nucleating agent in the mixed solution is 2% to 6%.

[0045] S120. Polymerizing the above mixed solution with polyamide monomers to obtain polyamide chips.

[0046] Wherein, the polyamide slice is a polymer slice with amide repeating units on the polymer chain.

[0047] Polyamide slices are polyamide 6 slices, polyamide 66 slices, polyamide 610 slices, polyamide 612 slices, polyamide 1010 slices, polyamide 11 slices, polyamide 12 slices or copolyamide 6 / 66 slices.

[0048] It can be understood that the polyamide monomers used in step...

Embodiment 1

[0059] Mix nylon 22 and caprolactam to prepare a mixed solution with a mass content of nylon 22 of 5%. Mix the mixture with caprolactam at a ratio of 2:98, enter the polymerization reactor, polymerize under normal pressure for 12 hours, melt-cast and cut into pellets, extract with desalted water at 98°C for 24 hours, and dry with hot nitrogen for 16 hours to obtain Polyamide 6 slices. It was determined that the relative viscosity of polyamide 6 chips was 2.52, and the extractables were 0.35%.

[0060]The above-mentioned polyamide 6 slices were fed into a conical mixer, 0.15% of partially saponified montanic acid ester wax was added, mixed at 80°C for 20 minutes, and after cooling, a polyamide resin composition was obtained without any separated powder.

[0061] The above polyamide resin composition contains 0.1% of nylon 22, 0.15% of partially saponified montan ester and 99.75% of polyamide 6.

[0062] Using the polyamide resin composition prepared in Example 1, the metal pi...

Embodiment 2

[0070] The specific surface area is 130m 2 / g nano silicon dioxide is mixed with caprolactam to prepare a mixed solution with a mass content of silicon dioxide of 3%. Mix the mixture with caprolactam at a ratio of 4:96, enter the polymerization reactor, polymerize under normal pressure for 12 hours, melt-cast and cut into pellets, extract with desalted water at 98°C for 24 hours, and dry with hot nitrogen for 16 hours to obtain Polyamide 6 slices. It was determined that the relative viscosity of polyamide 6 chips was 2.57, and the extractables were 0.41%.

[0071] The above-mentioned polyamide 6 slices were sent into a conical mixer, a mixture of 0.05% ethylene glycol montanate and 0.1% stearyl stearamide was added, mixed at 80°C for 20 minutes, and a polyamide resin composition was obtained after cooling. No isolated powder was present.

[0072] The above polyamide resin composition contains 0.12% of silica, 0.15% of a release agent and 99.83% of polyamide 6.

[0073] Usi...

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
melting pointaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention provides a polyamide composition. The polyamide composition is prepared from, by mass, 0.05%-0.5% of nucleating agent, 0.05%-0.5% of release agent and the balance polyamide. The invention further provides a preparation method of the polyamide composition. According to the polyamide composition and the preparation method thereof, the nucleating agent and polyamide monomers are mixed to be prepared into mixed liquor, the mixed liquor and the polyamide monomers are polymerized, no melt blending is needed, the release agent and polyamide slices are mixed to be uniform, uniform and stable coating layers are formed on the surfaces of the polyamide slices, no separable powder exists, the prepared polyamide composition has good product colors, and the combustion characteristic of pure polyamide resin is kept.

Description

technical field [0001] The invention relates to the field of injection molding processing, in particular to a polyamide composition and a preparation method thereof. Background technique [0002] Injection molding is one of the commonly used processing methods for polyamide resin. Various electrical, mechanical and daily necessities parts can be produced through injection molding. [0003] In order to achieve high-efficiency continuous production, injection molding requires polyamide resins to have good melt fluidity, short cooling and setting time as much as possible and good dimensional stability, and most importantly, it should be very easy to take out from the mold. [0004] Accelerating the setting speed of polyamide resin needs to be realized by adding nucleating agent. The traditional means of implementation is to melt blend polyamide resin with nucleating agent, which seriously affects the whiteness of polyamide resin. [0005] As a polar polymer, polyamide resin h...

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): C08G69/16C08G69/28C08K3/36C08L77/02C08L77/06C08L91/06C08K5/20C08K5/103
Inventor 唐成华旷志刚李先华彭蓉晖蒋雪莲张利建
Owner CHINA PETROLEUM & CHEM CORP
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