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

Halogen-free flame-retardant polycarbonate and preparation method thereof

A technology for flame retardant polycarbonate and polycarbonate, which is applied in chemical instruments and methods, organic chemistry, compounds of Group 5/15 elements of the periodic table, etc. Flame retardant and fire protection requirements, etc., to achieve the effect of suitable melting point, excellent flame retardant effect, and excellent thermal stability

Inactive Publication Date: 2019-07-12
安徽申嘉聚合物科技有限公司
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PC material has a high char formation rate when it is burned, and it can self-extinguish. The flame retardant grade is UL94V-2. Compared with ordinary thermoplastics, although it has better flame retardancy, it is still flammable, and there will be hot melt dripping when burning. , it is easy to cause nearby materials to catch fire, and it is still difficult to meet the requirements of flame retardant and fire prevention in the above application fields, so in many practical applications, PC materials must be treated with flame retardant

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
  • Halogen-free flame-retardant polycarbonate and preparation method thereof
  • Halogen-free flame-retardant polycarbonate and preparation method thereof
  • Halogen-free flame-retardant polycarbonate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The synthesis of halogen-free flame retardant DOPMI, its synthetic route is as follows:

[0023] .

[0024] (1) Add DOPO and THF into a four-neck flask, heat up to 80-100°C and stir;

[0025] (2) Infuse nitrogen gas into the four-necked flask, and after DOPO is completely dissolved, add 10-20% by mass of triphenylphosphine;

[0026] (3) Add N-PMI to tetrahydrofuran to prepare N-PMI solvent, and set it aside;

[0027] (4) Slowly add the prepared N-PMI solution dropwise into the four-necked flask at a certain temperature of 120-160°C, and continue to react for 2-3 hours after the addition is complete;

[0028] (5) After the reaction is completed, a fine sandy white solid is obtained after suction filtration, washing and drying, which is the halogen-free flame retardant of the present invention.

[0029] In a clean four-necked flask, add 15ml of tetrahydrofuran as an organic solvent, then add 2.16g of DOPO into a 100ml four-necked flask, heat up to 90°C and stir, and ...

Embodiment 2

[0033] Structural characterization and thermal performance analysis of halogen-free flame retardant DOPMI:

[0034] figure 1 FT-IR spectra of DOPO, N-PMI and DOPMI. From figure 1 It can be seen that the strong characteristic absorption peak 2437cm-1 of the P-H bond in DOPO disappears in the middle and late stages of DOPMI, and the strong conjugated double bond absorption peak 832cm-1 of N-PMI does not appear in the DOPMI spectrum, indicating that two had a reaction. It can be seen in the DOPMI spectrum that the absorption peak of Ar-H is at 3060cm-1, the characteristic peak of C=O is at 1712cm-1, the absorption peak of P-Ph is at 1594cm-1, and the absorption peak of P-Ph is at 1196cm-1. The OP-Ph absorption peak and the characteristic peaks characterize the structure of DOPMI, and the infrared slit results show that the expected reaction between DOPO and N-PMI occurred.

[0035] figure 2 and image 3 LC and MS spectra of DOPMI, respectively. From figure 2 It can be s...

Embodiment 3

[0038] (1) Synthesize DOPO and N-PMI in the organic solvent tetrahydrofuran, and obtain the fine sandy white solid halogen-free flame retardant DOPMI after suction filtration, washing and drying;

[0039] (2) After adding the DOPMI solid into the pulverizer and pulverizing it, put it in a blast drying oven with a temperature of 100-110°C and dry it for 6-8 hours;

[0040] (3) After mixing 3 parts by weight of DMPMI powder I, 24 parts by weight of phosphorus-containing flame-retardant PET, 2 parts by weight of MPS, and 1 part by weight of other additives, extrude in a screw extruder out and granulated to obtain the halogen-free flame-retardant polycarbonate of the present invention.

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
thermal decomposition temperatureaaaaaaaaaa
oxygen indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses halogen-free flame-retardant polycarbonate which is a novel halogen-free flame retardant DOPMI, and the DOPMI has an appropriate melting point and excellent thermal stability,is easy to disperse in a thermoplastic polymer through melting blending, is capable of meeting processing molding requirements of multiple flame-retardant polymers, has excellent flame retardant effects when being independently used in PC (Polycarbonate) or compounded with phosphorus-containing flame-retardant PET (Polyethylene Glycol Terephthalate) and MPS and applied to PC, and can be applied toindustrial production of flame-retardant polycarbonate. The invention discloses application of the DOPMI in PC to increase the flame retardancy degree of PC to UL94V-0, and discloses component proportions and a preparation method of the flame-retardant polycarbonate.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant polycarbonate and a preparation method thereof, belonging to the field of polycarbonate flame-retardant materials. Background technique [0002] Polycarbonate (PC) is a thermoplastic engineering plastic with excellent comprehensive properties. It has outstanding impact resistance, transparency, dimensional stability, excellent mechanical properties and electrical insulation properties, and a wide temperature range (-60- 120°C), good creep resistance, weather resistance and self-extinguishing properties, so it has a wide range of applications in the fields of electronics, electrical, automotive, construction, packaging, etc. In recent years, it has rapidly expanded to new technologies such as aviation, aerospace, and computers. field. The PC material has a high char formation rate when it is burned, and it can self-extinguish. The flame retardant grade is UL94V-2. Compared with ordinary thermoplas...

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): C08L69/00C08L67/02C08K5/5313C07F9/6571
CPCC07F9/657172C08L69/00C08L2201/02C08L2201/08C08L2201/22C08L67/02C08K5/5313
Inventor 吴国忠李会
Owner 安徽申嘉聚合物科技有限公司
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