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

High-temperature-resistant high-transparency polypropylene, nucleating agent thereof and preparation methods

A transparent polypropylene and nucleating agent technology, applied in the field of polypropylene manufacturing, can solve the problems of limited use range, odor, poor heat resistance, etc., to improve compatibility, prevent melting air leakage, high temperature resistance and transparency Effect

Pending Publication Date: 2021-07-06
常州博疆新材料科技有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

DBS modified PP has good surface gloss, transparency and mechanical properties, and is widely used in the pharmaceutical industry; but its heat resistance is poor, and it will emit odor at higher temperatures, which limits its use. Range, and there are embossing and whitening phenomenon

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-temperature-resistant high-transparency polypropylene, nucleating agent thereof and preparation methods
  • High-temperature-resistant high-transparency polypropylene, nucleating agent thereof and preparation methods
  • High-temperature-resistant high-transparency polypropylene, nucleating agent thereof and preparation methods

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] In the manufacturing process of wind turbine blades, it is often necessary to inject molten resin into the mold, and the limit temperature of resin heat release can reach 180°C. Therefore, the auxiliary materials used must have good high temperature resistance.

[0014] In order to solve the above technical problems, the present invention provides a nucleating agent for polypropylene, the nucleating agent is hydroxyapatite modified by hydroxyl groups; wherein the modified agent modified by hydroxyl groups is carboxylic acid, with Long chain alkyl groups are formed on the surface of hydroxyapatite.

[0015] Specifically, carboxylic acid is used to modify a large number of hydroxyl groups on the surface of hydroxyapatite to form long-chain alkyl groups on the surface of hydroxyapatite, which reduces the number of hydroxyl groups on the surface of hydroxyapatite and improves the relationship between hydroxyapatite and polystyrene. Propylene Compatibility.

[0016] Optiona...

Embodiment 1-1

[0026] Take 1 mass part of hydroxyapatite (HAP) with a particle size D95 of 500nm and add it to a high-speed stirring kneader, add 0.25 mass part of n-propionic acid and 0.02 mass part of copper sulfate at room temperature, and stir and knead for 20 minutes at room temperature , then heated up, stirred and kneaded, and reacted under vacuum at 120° C. for 30 minutes to obtain n-propionic acid-modified hydroxyapatite (HAP) n-propionic acid 25-HAP500.

[0027] 1.25 parts by mass of polypropylene (PP) particles and 1.25 parts by mass of n-propionic acid 25-HAP500 nucleating agent were added to the twin-screw extruder in the feeding mode of hopper feeding and side feeding, according to the temperature in Table 1 Set and control the temperature of each zone in the twin-screw extruder, extrude and pelletize and then dry to obtain modified polypropylene particles.

[0028] Table 1 The temperature of each zone in the twin-screw extruder

[0029] Zone I Zone II Zone III ...

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

No PUM Login to View More

Abstract

The invention belongs to the technical field of polypropylene manufacturing, and particularly relates to high-temperature-resistant high-transparency polypropylene, a nucleating agent thereof and preparation methods. The nucleating agent for the polypropylene is hydroxylapatite which is modified by hydroxyl, and the hydroxyl modification modifier is carboxylic acid so as to form a long-chain alkyl group on the surface of hydroxyapatite. The hydroxyl modified hydroxyapatite serves as a nucleating agent of polypropylene, long-chain alkyl is formed on the surface of the hydroxyapatite, hydroxyl on the surface of the hydroxyapatite is reduced, and the compatibility of the hydroxyapatite and the polypropylene is improved. The polypropylene material with high-temperature resistance and good transparency is prepared by using the nucleating agent in preparation of polypropylene. The polypropylene is used for preparing an auxiliary material of a large-scale wind power blade, so that the melting and air leakage of the auxiliary material caused by high-temperature heat release during resin curing in the preparation of the wind power blade are prevented, and accidents in the preparation process of the blade are avoided.

Description

technical field [0001] The invention belongs to the technical field of polypropylene production, and in particular relates to a high-temperature-resistant high-transparency polypropylene, a nucleating agent and a preparation method thereof. Background technique [0002] Polypropylene (PP) is one of the five general-purpose plastics in the world, non-toxic, tasteless, and low density (0.92g / cm 3 ), high mechanical strength, low water absorption, excellent dielectric properties, flexibility (generally up to 106 times), molding processability and chemical stability, and relatively cheap price, so it is used in many fields, modified The research on PP is also more and more favored by experts and scholars. [0003] At present, the most commonly used nucleating agents for enhancing light and anti-reflection are benzylidene sorbitol nucleating agents. Among them, the synthesis of unsubstituted dibenzylidene sorbitol (DBS) is based on sorbitol and benzaldehyde or substituted benza...

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
IPC IPC(8): C08K9/04C08K3/32C08L23/12
CPCC08K9/04C08K3/32C08L2201/08C08L2201/10C08L2205/24C08L23/12
Inventor 李勇锋蒋旭玲白成坡白朋立唐普林
Owner 常州博疆新材料科技有限公司