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

Prepn. of PVF

A technology of polyvinyl fluoride and vinyl fluoride, applied in the field of preparation of polyvinyl fluoride, which can solve the problems of low polymerization activity of vinyl fluoride, difficulty in obtaining polyvinyl fluoride resin, etc., achieve good film-forming performance, and improve catalyst and equipment use efficiency , the effect of excellent comprehensive performance

Active Publication Date: 2009-06-17
ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymerization activity of vinyl fluoride is low, and it is generally difficult to obtain polyvinyl fluoride resins with excellent properties.

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
  • Prepn. of PVF

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1) Add 6,000 parts of distilled water into a 10-liter polymerization reactor, stir and heat to 30°C, add 1,000 parts of distilled water, 1 part of azobisisobutylamidine hydrochloride and 25 parts of potassium chloride into the batching kettle, and stir After uniformity, add to the polymerization reactor, raise the temperature of the polymerization reactor to 100°C quickly, and use a metering pump to input vinyl fluoride monomer, keep the pressure in the polymerization reactor between 25.0 and 28.0MPa, react for 2.5 hours to cool down, and recover the unreacted monomer body, discharged to obtain white foam powder, filtered, washed and dried to obtain 985 parts of white powder. The product was dissolved in N,N-dimethylformamide at 110°C, and the measured intrinsic viscosity of the polymer was 1.51dL / g.

Embodiment 2

[0011] Example 2) Add 6,000 parts of distilled water to a 10-liter polymerization reactor, stir and heat to 30°C, add 1,000 parts of distilled water, 1 part of azobisisobutylamidine hydrochloride and 25 parts of potassium hydroxide to the batching kettle, and stir After uniformity, add to the polymerization reactor, raise the temperature of the polymerization reactor to 100°C quickly, and use a metering pump to input vinyl fluoride monomer, keep the pressure in the polymerization reactor between 25.0 and 28.0MPa, react for 2.5 hours to cool down, and recover the unreacted monomer body, discharged to obtain white fine spherical particles, filtered, washed and dried to obtain 1320 parts of white powder. The product was dissolved in N,N-dimethylformamide at 110°C, and the measured intrinsic viscosity of the polymer was 1.35 dL / g.

Embodiment 3

[0012] Example 3) Add 6,000 parts of distilled water into a 10-liter polymerization reactor, stir and heat to 30°C, add 1,000 parts of distilled water, 1 part of azobisisobutylamidine hydrochloride and 25 parts of hydrochloric acid into the batching kettle, and stir evenly Add the polymerization reactor, raise the temperature of the polymerization reactor to 100°C quickly, and use a metering pump to input vinyl fluoride monomer, keep the pressure in the polymerization reactor between 25.0 and 28.0MPa, react for 2.5 hours to cool down, and recover the unreacted monomer. Discharge to obtain white foam powder, filter, wash and dry to obtain 311 parts of white powder. The product was dissolved in N,N-dimethylformamide at 110°C, and the measured intrinsic viscosity of the polymer was 1.82dL / g.

[0013] Polyvinyl fluoride was melted and extruded by latent solvent N,N-dimethylformamide to form a biaxially stretched film and then tested according to GB530-88, GB13022-91, GB / T2410-1980...

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

This invention discloses a method to prepare polyvinyl fluoride in which vinyl fluoride is adopted as monomers for polymerization. It has the characteristics that polymerization takes place with the existence of soluble radical initiators and auxiliary reagents. The auxiliary reagents in this invention can be: A) neutral inorganic salts; B) alkali or alkali compounds; C) acid or acidic compounds. This invention has the advantages that compared to previous literature, a) polymerization time can be reduced and efficiency of catalyst and facility can be promoted without obvious change in product properties such as intrinsic viscosity, melting point and melting heat by addition of auxiliary reagent A); b) melting point and melting heat of the product can be raised by addition of auxiliary reagent B); c) melting point and melting heat of the product can be lowered by addition of auxiliary reagent C). The polyvinyl fluoride membrane by melting tape-casting extrusion with potential solvent such as N, N-dimethylformamide and biaxial orientation of vinyl fluoride has wonderful comprehensive properties.

Description

technical field [0001] The invention relates to a preparation method of polyvinyl fluoride. Background technique [0002] Fluorine resin has excellent high and low temperature resistance, good resistance to chemical solvents, acid and alkali corrosion, atmospheric aging resistance and stress cracking resistance; it has excellent electrical insulation, self-lubricating, non-stick, non-flammable and self-sustaining It is extinguishing, does not absorb water, and has the lowest coefficient of friction among all plastics. It is odorless, tasteless, and non-toxic. It has been widely used in chemical, electrical, electronic, and mechanical industries. It is an indispensable special engineering plastic in industry. Polyvinyl fluoride is the simplest representative of the fluoropolymer congeners, containing the fewest number of fluorine atoms in its composition, and therefore has the lowest density and production cost compared to other fluoropolymers. But like other fluoropolymers,...

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 Patents(China)
IPC IPC(8): C08F114/20C08F4/30C08F2/00
Inventor 张艳中蒋争光
Owner ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI TECH
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