Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polyolefine toughening modifier and its production

A technology of toughening modifiers and modifiers, which is applied in the field of modifiers and their preparation, can solve problems such as the difficulty of adding inorganic fillers, and achieve remarkable toughening effects, strong compatibility, and good tensile strength. Effect

Active Publication Date: 2007-04-04
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The elastomer is a cross-linked compound composed of ethylene-octene copolymer, high-density polyethylene and inorganic nanomaterials, which can significantly improve the impact resistance of homopolypropylene while maintaining its tensile strength and Rigidity, but it is difficult to add inorganic fillers to this system to further significantly improve the rigidity of the material

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
  • Polyolefine toughening modifier and its production

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The preparation method of modifier provided by the invention comprises the steps:

[0020] (1) Pre-mixing: add ethylene-vinyl acetate copolymer and low-density polyethylene into a low-speed mixer with a rotation speed of 50-100 rpm in turn, pre-mix at 20-40°C, and then slowly add a cross-linking agent to mix, mix The time is preferably 5 to 8 minutes;

[0021] (2) Cross-linking: Add the material mixed in step (1) into the co-rotating parallel twin-screw extruder, control the extrusion temperature of each section to 150-250°C, and the screw speed to 150-250 rpm. The speed of the machine is 20-50 rpm to obtain cross-linked particles;

[0022] (3) Partial alcoholysis: adding the cross-linked particles into an aqueous solution containing 1.0-3.0% by mass of potassium hydroxide, reacting at 50-70° C. for partial alcoholysis, and controlling the degree of alcoholysis to be 80-90%.

[0023] The (1) premixed feed can further contain inorganic substances. When feeding, ethylen...

example 1

[0038] Preparation of the partially alcoholyzed cross-linked product of the present invention.

[0039] (1) premixing: get 2100 grams of vinyl acetate (VA) content is 28.0%, melt index is the ethylene-vinyl acetate (EVA) copolymer of 6.2 grams / 10 minutes (produced by Beijing Organic Chemical Factory, trade mark EVA28-6 ), the density of 900 grams is 0.923 g / cm 3 , a melt index of 3.1 grams / 10 minutes of low-density polyethylene (Qilu Petrochemical Company plastic factory production, trade mark TN26), 9 grams of cross-linking agent DTBP (di-tert-butyl peroxide). First mix EVA28-6 and TN26 in a low-speed mixer with a rotation speed of 60 rpm at 25°C for 3 minutes, then add DTBP and mix for 8 minutes to form a mixture.

[0040](2) Cross-linking: Add the mixture in step (1) into a co-rotating parallel twin-screw extruder for granulation. The temperature distribution of the extruder is 160°C in the first zone, 180°C in the second zone, 190°C in the third zone, 190°C in the fourth...

example 2

[0043] Modifier B is prepared according to the method of example 1, except that the crosslinking agent added in (1) step is 9 grams of two "2,5" vulcanizing agents [(2,5-dimethyl-2,5-di (tert-butyl peroxy) hexane].The composition and degree of alcoholysis of modifier B are shown in Table 1.

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 indexaaaaaaaaaa
Granularityaaaaaaaaaa
Granularityaaaaaaaaaa
Login to View More

Abstract

A polyolefin toughening modifier and its production are disclosed. It consists of vinyl-vinyl acetate copolymer 60-80wt% and low-density polyethylene 20-40wt%, the alcoholysis degree is 80-90wt%. It has better toughness and rigidity and can be used for inorganic filler.

Description

technical field [0001] The invention relates to a modifier for modifying polyolefin and a preparation method thereof, in particular to a modifier for increasing the toughness and rigidity of polyolefin and a preparation method thereof. Background technique [0002] Polypropylene is a kind of thermoplastic resin with good comprehensive properties. In addition to good mechanical properties, processing properties and optical properties, it also has the advantage of low price. It is one of the fastest growing materials in recent years. A lot of research work has been done to improve the impact strength, rigidity, heat deflection temperature and various other properties of polypropylene. Especially in terms of improving the impact resistance of polypropylene, elastomer toughening systems such as EPDM / PP, SBS / PP and POE / PP have been developed. In terms of improving the rigidity of polypropylene products, calcium carbonate, talcum powder, mica powder, wollastonite and other inorga...

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): C08L23/08C08L23/00C08J3/24
Inventor 杨军忠刘伟景振华孙春燕
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com