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Normal temperature curing solvent type two-component erasable coating and preparation method thereof

A room temperature curing, solvent-based technology, used in the field of coatings, can solve the problems of good rewritability, rewritable coatings cannot have both normal temperature film formation and high adhesion, and achieves excellent mechanical properties and weather resistance. , good rewritability effect

Inactive Publication Date: 2015-05-13
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a two-component solvent-type rewritable paint cured at room temperature, which solves the problem that the rewritable paint in the prior art cannot simultaneously have the properties of film formation at room temperature, good rewritability, and high adhesion.

Method used

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  • Normal temperature curing solvent type two-component erasable coating and preparation method thereof
  • Normal temperature curing solvent type two-component erasable coating and preparation method thereof
  • Normal temperature curing solvent type two-component erasable coating and preparation method thereof

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preparation example Construction

[0040] The preparation method of the two-component solvent-type rewritable coating cured at room temperature comprises the following steps:

[0041] a. Preparation of component A

[0042] Step 1. Take 30-50% of the formula amount of organic solvent, add the formula amount of pigment, the formula amount of polytetrafluoroethylene and 10-20% of the formula amount of dispersant, and use a high-speed disperser to pre-disperse to obtain a slurry, wherein , the rotating speed is 1000~3000 rpm, and the dispersion time is 30~90min;

[0043] Step 2, placing the slurry obtained in step 1 in a three-roll grinder, and grinding until the slurry has a fineness of 10-20 μm to obtain a color paste;

[0044]Step 3, mixing the hydroxyl-containing chlorotrifluoroethylene-vinyl ether copolymer of the formulation amount, the hydroxyl-containing acrylic resin of the formulation amount with the organic solvent of the remaining formulation amount, adding the color paste obtained in step 2, the dispe...

Embodiment 1

[0050] The organic solvent described in this embodiment is butyl acetate:cyclohexane:ethylene glycol butyl ether mixed in a volume ratio of 7:2:1; the pigment is rutile titanium dioxide.

[0051] A method for preparing a two-component solvent-type rewritable coating cured at room temperature, comprising the following steps:

[0052] a. Preparation of component A

[0053] Step 1. Take 8 parts by mass of organic solvent, add 12 parts by mass of pigment, 10 parts by mass of polytetrafluoroethylene and 0.75 parts by mass of dispersant, and use a high-speed disperser to pre-disperse to obtain a slurry, wherein the rotating speed is 2000 rpm. Dispersion time 60min;

[0054] Step 2, placing the slurry obtained in step 1 in a three-roll mill, and grinding until the slurry has a fineness of 15 μm to obtain a color paste;

[0055] Step 3, mix 50 mass parts of hydroxyl-containing chlorotrifluoroethylene-vinyl ether copolymer, 20 mass parts of hydroxyl-containing acrylic resin with 12 m...

Embodiment 2

[0061] The organic solvent described in this embodiment is butyl acetate:cyclohexane:ethylene glycol butyl ether mixed in a volume ratio of 6:1:1; the pigment is rutile titanium dioxide.

[0062] A method for preparing a two-component solvent-type rewritable coating cured at room temperature, comprising the following steps:

[0063] a. Preparation of component A

[0064] Step 1. Take 3 parts by mass of organic solvent, add 10 parts by mass of pigment, 5 parts by mass of polytetrafluoroethylene and 0.2 part by mass of dispersant, and use a high-speed disperser to pre-disperse to obtain a slurry, wherein the rotating speed is 1000 rpm. Dispersion time 90min;

[0065] Step 2, placing the slurry obtained in step 1 in a three-roll mill, and grinding until the slurry has a fineness of 10 μm to obtain a color paste;

[0066] Step 3, mix 40 mass parts of hydroxyl-containing chlorotrifluoroethylene-vinyl ether copolymers, 15 mass parts of hydroxyl-containing acrylic resins with 7 mas...

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Abstract

The invention discloses a normal temperature curing solvent type two-component erasable coating. The coating comprises a component A and a component B according to a mass ratio of (6-10):1, wherein the component A comprises the following materials in parts by mass: 40-60 parts of hydroxyl-containing chlorotrifluor ethylene-vinyl ether copolymer, 15-30 parts of hydroxyl-containing acrylic resin, 5-15 parts of Teflon, 10-35 parts of organic solvent, 10-15 parts of pigment, 2-7 parts of dispersing agent, 0.1-0.5 part of defoaming agent, 0.1-1 part of flatting agent, and 0.1-1 part of base material wetting agent; the component B comprises the following materials in parts by mass: 60-100 parts of isocyanate and 5-30 parts of organic solvent. The invention also discloses a preparation method for the coating. The coating can be cross linked and cured at normal temperature to form a film; due to the unique self-stratifying system design, the obtained film not only has good erasable performance, but also has excellent adhesive force, weather fastness and mechanical property. The coating has very wide application prospect.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a normal-temperature curing two-component solvent-type rewritable coating and a preparation method thereof. Background technique [0002] Nowadays, with the improvement of people's living standards, the people's requirements for the quality of life are also getting higher and higher. This gives more and more applications for rewritable coatings. For example, give children a room where they can draw freely, put a "coat" on the lamppost that is not afraid of getting dirty, give the company conference room a unique whiteboard wall, and so on. [0003] At present, there are many studies on rewritable coatings, and the main performance of rewritable coatings is determined by the resin used. The types of resins used in the existing rewritable coatings mainly include: polyurethane, fluorocarbon resin, fluorosilicone resin and the like. Among them, fluorocarbon resin has stable C-F b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D127/18C09D7/12C08G18/62
Inventor 刘松琴李闯李进陈成良
Owner SOUTHEAST UNIV
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