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

A salt-spray-resistant phosphate-modified acrylic core-shell emulsion

A technology of acrylic core and phosphate ester, which is applied in the fields of compounds, organic chemistry, coatings, etc. of Group 5/15 elements of the periodic table. Water resistance, poor salt spray resistance and other problems, to achieve the effect of excellent adhesion

Active Publication Date: 2020-07-21
ZHUHAI JELEE CHEM ENTERPRISE CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese patent CN102408513A discloses a method for preparing a phosphate-modified acrylate emulsion. The phosphate monomer used is trichloroethyl phosphate, trichloropropyl phosphate or n-ethyl phosphate, and the resulting phosphate-modified The molecular weight of the polymer in the acrylate emulsion is 2000-3000, and the particle size is 0.2-0.6 μm. The initiator used is ammonium persulfate. The particle size of the synthesized emulsion is large, which affects the film-forming performance, and the phosphate monomer used The alkyl carbon number is less, and the water resistance and salt spray resistance are poor
[0008] Chinese patent CN101412781A discloses a preparation method of phosphate-modified acrylate emulsion, the phosphate monomer used is Rhodia's PMA-100 (hydroxyethyl methacrylate phosphate monoester) or PMA-200 (methyl Hydroxyethyl acrylate phosphate diester), the prepared acrylic resin is formulated into a water-based two-component coating, which has excellent water resistance and salt spray resistance, but the prepared acrylic resin is not a core-shell structure, it is a water dispersion, and must be prepared Two-component system, increasing application cost
[0009] Zhang Dongyang (Research on the synthesis and performance of phosphate-modified acrylate emulsion, China Paint, 2014, 29(10); 38-43) reported that the functional Phosphate-modified acrylate emulsion was synthesized with monomers, the phosphate monomer used was Rhodia’s PMA-100 or PMA-200, the initiator was ammonium persulfate, and the emulsifier was a single anionic emulsifier. It is a phosphate-modified styrene-acrylic core-shell emulsion, and its aging resistance and salt spray resistance are not very satisfactory.
[0010] At present, water-based anti-corrosion coatings have problems such as short anti-corrosion period, easy flash corrosion after coating, emulsion stability, water resistance and rust resistance.

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
  • A salt-spray-resistant phosphate-modified acrylic core-shell emulsion
  • A salt-spray-resistant phosphate-modified acrylic core-shell emulsion
  • A salt-spray-resistant phosphate-modified acrylic core-shell emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of octyl-hydroxyethyl acrylate phosphodiester A, its preparation process is as follows:

[0039] In the reaction kettle, add 35.0 parts of hydroxyethyl acrylate and 0.2 parts of hydroquinone, stir evenly, raise the temperature to 50°C, add 28.0 parts of phosphorus pentoxide and 36.8 parts of octanol in batches, and complete the addition within 1.5 hours , and then raise the temperature to 82° C., keep the temperature for 3 hours, measure the acid value, cool down after passing the test, and discharge to obtain the octyl-hydroxyethyl acrylate phosphate diester A.

Embodiment 2

[0041] A kind of hexyl-hydroxyethyl methacrylate phosphodiester B, its preparation process is as follows:

[0042] In the reaction kettle, add 40.0 parts of hydroxyethyl methacrylate and 0.2 parts of hydroquinone, stir evenly, raise the temperature to 50°C, add 26.0 parts of phosphorus pentoxide and 33.8 parts of hexanol in batches, within 1.5h After the addition, the temperature was raised to 82°C, and the temperature was maintained for 3 hours to measure the acid value. After passing the test, the temperature was lowered, and the material was discharged to obtain the hexyl-hydroxyethyl methacrylate phosphodiester B.

Embodiment 3

[0044] A kind of octyl-acrylate hydroxypropyl phosphate diester C, its preparation process is as follows:

[0045] In the reaction kettle, add 38.0 parts of hydroxypropyl acrylate and 0.2 parts of hydroquinone, stir evenly, raise the temperature to 50°C, add 30.0 parts of phosphorus pentoxide and 31.8 parts of octanol in batches, and complete the addition within 1.5 hours , and then raise the temperature to 82°C, keep the temperature for 3 hours, measure the acid value, cool down after passing the test, and discharge to obtain the octyl-hydroxypropyl acrylate phosphate diester C.

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
particle diameteraaaaaaaaaa
glass transition temperatureaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a salt-spray-resistant phosphate-modified acrylic core-shell emulsion. The shell layer contains long-chain alkyl-acrylate phosphodiester functional groups; its components include acrylate soft and hard monomers, acrylic acid, long-chain Alkyl-acrylate phosphate diester, neutralizer, initiator, emulsifier and water; the long-chain alkyl-acrylate phosphate consists of hydroxy acrylate monomer, R 6‑10 OH and phosphorus pentoxide are prepared through reaction; the invention also provides a method for preparing a salt spray-resistant phosphate-modified acrylic core-shell emulsion. The phosphate-modified acrylic core-shell emulsion has a glass transition temperature of 30-45° C. and a particle size of 60-150 nm; the salt-spray-resistant phosphate-modified acrylic core-shell emulsion prepared by the present invention has excellent attachment Strength, water resistance, acid and alkali resistance, salt spray resistance, flash rust resistance and corrosion resistance, widely used in water-based anti-rust coatings, water-based steel structure coatings, water-based engineering coatings, water-based concrete anti-corrosion coatings, etc.

Description

technical field [0001] The invention relates to a modified acrylic emulsion, in particular to a salt spray-resistant phosphate-modified acrylic core-shell emulsion, which belongs to the technical field of water-based resin synthesis. Background technique [0002] In recent years, with the increasing attention of human beings to environmental pollution and the depletion of global oil resources, the use of solvent-based coatings has been greatly limited. Low-VOC and low-toxicity coatings such as water-based coatings, high-solid coatings, powder wood The research and development and production of coatings and radiation-cured coatings have developed rapidly. Among them, water-based coatings, because water is used as the dispersion medium, have no pollution, no fire hazards, low production costs, conform to green production, and have very broad development prospects. [0003] Corrosion of metals brings economic losses of hundreds of billions of dollars to countries around the wo...

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): C08F220/14C08F220/18C08F230/02C08F220/06C09D133/12C09D133/08C09D5/08C07F9/11
CPCC09D143/02C07F9/11C08F220/14C09D5/08C08F220/1804C08F220/1808C08F230/02C08F220/06C08F220/1812
Inventor 许钧强王茵键
Owner ZHUHAI JELEE CHEM ENTERPRISE CO LTD