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

High-adhesion water-based vinylidene chloride copolymer emulsion for metal surface and preparation method thereof

A technology of vinylidene chloride and high adhesion, applied in the direction of coating, etc., can solve the problems of restricting the application of vinylidene chloride resin, poor adhesion of metal substrates, and decreased coating adhesion, so as to improve the barrier performance of resin, Improves resin adhesion and facilitates migration

Active Publication Date: 2020-09-25
TIANJIN CHENGJIAN UNIV
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-based vinylidene chloride coatings can be prepared by dispersing vinylidene chloride copolymer emulsion with functional additives, pigments and fillers. This type of coating has good properties such as moisture resistance, abrasion resistance, oil resistance, chemical corrosion resistance and flame retardancy. The adhesion on the metal substrate is not good, and the paint film is easy to fall off in a large area, which seriously restricts the application of vinylidene chloride resin in the field of metal anti-corrosion coatings
[0003] Copolymerization of vinylidene chloride with acrylate and other monomers to prepare vinylidene chloride copolymer emulsion can improve the adhesion of the resin on the metal surface, but the introduction of comonomers leads to a decrease in the compactness of the coating and a decrease in barrier properties
Adding adhesion-enhancing resin to water-based vinylidene chloride coatings can improve the coating adhesion to a certain extent, but vinylidene chloride resin has strong crystallinity and poor compatibility with ordinary adhesion-enhancing resins. Vinyl resin is prone to phase separation from the external resin, resulting in a decrease in coating adhesion

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The preparation method of the high-adhesion water-based vinylidene chloride copolymer emulsion for metal surface of the present invention comprises the following steps:

[0019] (1) Vinylidene chloride, butyl acrylate, emulsifier and water are added in the pre-emulsification tank, stirred and emulsified under ice-bath conditions, to obtain a pre-emulsion, wherein the mass percent of vinylidene chloride and butyl acrylate is (75 ~85)%: (15~25)%, the emulsifier is sodium dodecyl sulfonate and alkyl glycoside, the dosage is 1.0%~2.5% of the total mass of vinylidene chloride and butyl acrylate, the dosage of water is partial 75% to 115% of the total mass of vinyl chloride and butyl acrylate;

[0020] (2) Add 20% of the mass of the pre-emulsion to the reaction kettle, then add the molecular weight modifier and functional monomer, vacuumize the reaction system, fill with nitrogen, repeat three times, raise the temperature of the reaction system to 35°C, and add the initiator ...

Embodiment 1

[0033] Dissolve 0.95g sodium dodecylsulfonate and 1.00g alkyl glycoside in 100mL deionized water, stir until the emulsifier is completely dissolved, add 78.00g vinylidene chloride and 22.00g butyl acrylate under ice bath conditions, and emulsify with high-speed stirring For 45 minutes, a pre-emulsion was obtained.

[0034] Next, transfer 40.39g of the above pre-emulsion to the reaction kettle, then add 0.18g of 2-mercaptobutyric acid, 1.26g of methacrylic acid, 1.30g of 4-sodium styrenesulfonate and 1.42g of 2-hydroxyethylmethyl Acrylate phosphate, fill the reactor with inert gas to exclude oxygen (three times), heat up to 35°C, add 0.25g potassium persulfate dissolved in 1mL water and 0.20g sodium thiosulfate dissolved in 1mL water, and polymerize at constant temperature For 3 hours, add the remaining pre-emulsion at one time, react at constant temperature for 7 hours, cool down, filter and discharge to obtain a vinylidene chloride copolymer emulsion: the solid content is 51%...

Embodiment 2

[0041] Dissolve 0.90g sodium dodecylsulfonate and 0.95g alkyl glucoside in 90mL deionized water, stir until the emulsifier is completely dissolved, add 80.00g vinylidene chloride and 20.00g butyl acrylate under ice bath conditions, stir and emulsify at high speed For 45 minutes, a pre-emulsion was obtained.

[0042] Next, transfer 38.37g of the above pre-emulsion to the reactor, then add 0.20g of ethyl 3-mercaptobutyrate, 1.45g of methacrylic acid, 1.50g of sodium 4-styrenesulfonate and 2.00g of 2-hydroxyethylmethyl Acrylate phosphate, fill the reactor with inert gas to exclude oxygen, raise the temperature to 35°C, add 0.20g potassium persulfate dissolved in 1mL water and 0.18g sodium thiosulfate dissolved in 1mL water, polymerize at constant temperature for 4 hours, Add the remaining pre-emulsion at one time, react at constant temperature for 6 hours, cool down, filter and discharge to obtain vinylidene chloride copolymer emulsion: solid content is 54%, viscosity is 265mPa·s...

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
Viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-adhesion water-based vinylidene chloride copolymer emulsion for a metal surface and a preparation method of the high-adhesion water-based vinylidene chloride copolymer emulsion. The preparation method comprises the following steps of: fully stirring vinylidene chloride, acrylate, an emulsifier and water to form a pre-emulsified liquid, adding part of the pre-emulsified liquid and a functional monomer into a reactor, initiating a polymerization reaction by adopting a redox system, reacting at constant temperature for a period of time, adding the residual pre-emulsified liquid into the reactor at one time, and continuously reacting to obtain the emulsion resin. The emulsion disclosed by the invention is good in storage stability and uniform in particle size, and the resin is extremely strong in adhesive force on a metal surface, has relatively good barrier property and corrosion resistance, and can be used as matrix resin for a metal substrate anticorrosivecoating.

Description

technical field [0001] The invention relates to a copolymerized emulsion paint, in particular to a water-based vinylidene chloride copolymerized emulsion with high adhesion for metal surfaces and a preparation method thereof. Background technique [0002] The copolymer emulsion synthesized with vinylidene chloride (VDC) as the main monomer is a coating matrix resin with excellent barrier properties, and has formed a series of commercial products at home and abroad. Water-based vinylidene chloride coatings can be prepared by dispersing vinylidene chloride copolymer emulsion with functional additives, pigments and fillers. This type of coating has good properties such as moisture resistance, abrasion resistance, oil resistance, chemical corrosion resistance and flame retardancy. The adhesion on the metal substrate is poor, and the paint film is easy to fall off in a large area, which seriously restricts the application of vinylidene chloride resin in the field of metal anti-co...

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): C08F214/08C08F220/18C08F220/06C08F212/14C08F230/02C08F2/26C08F2/30C08F2/38C09D127/08
CPCC08F214/08C08F2/26C08F2/30C08F2/38C09D127/08C08F220/1804C08F220/06C08F212/30C08F230/02
Inventor 王滨周小琴陈宇朱森
Owner TIANJIN CHENGJIAN UNIV
Features
  • Generate Ideas
  • 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