A kind of polyaspartate topcoat and its preparation method and application

A technology of aspartic acid ester and polyisocyanate, which is applied in polyamide coatings, coatings, anti-corrosion coatings, etc., can solve the problems of poor wettability of substrate materials, poor aging resistance, and poor surface effects, and achieve mechanical Excellent performance, good weather resistance, and the effect of improving adhesion

Active Publication Date: 2020-04-21
SHANGHAI ZHENHUA HEAVY IND CHANGZHOU COATINGS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with traditional polyurethane coatings, polyaspartic acid ester coatings, whose main resin polyaspartic acid ester is secondary aminodiamine, have faster reaction speed, are easy to realize thick coating, reduce construction time and times, and have excellent performance; However, due to the fast reaction speed during use, the surface effect is poor, the wettability to the base material is not good, the adhesion is low, and the thermal shrinkage rate is large; at the same time, the aging resistance is poor and the decoration performance is poor.

Method used

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  • A kind of polyaspartate topcoat and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Mix 85 parts of elastic isocyanate curing agent and 15 parts of aliphatic polyisocyanate trimer to obtain component A.

[0027] (2) Polystyrene grafted modified glass flakes

[0028] ① Add 100 parts of glass flakes and 1 part of silane coupling agent to the container, and mechanically stir for 15 minutes at room temperature to obtain glass flakes treated with silane coupling agent.

[0029] ② Mix 1 part of glass flakes treated with silane coupling agent, 10 parts of distilled water and 90 parts of ethanol, then ultrasonically shake for 30 minutes, pour into a 500mL three-necked flask, control the stirring speed to 450rpm; combine 10 parts of styrene and 2 parts of AIBN After mixing uniformly, pour it into the above-mentioned three-necked flask at one time, under nitrogen protection, and react at 60°C for 24 hours. After centrifugation and drying, polystyrene grafted modified glass flakes are obtained.

[0030] (3) Preparation of component B

[0031] ① Mix 30 parts of polyas...

Embodiment 2

[0036] (1) Mix 70 parts of elastic isocyanate curing agent and 30 parts of aliphatic polyisocyanate trimer to obtain component A.

[0037] (2) Polystyrene grafted modified glass flakes

[0038] ① Add 100 parts of glass flakes and 1 part of silane coupling agent to the container, and mechanically stir at room temperature for 15 minutes to obtain glass flakes treated with silane coupling agent.

[0039] ② Mix 1 part of glass flakes treated with silane coupling agent, 10 parts of distilled water and 90 parts of ethanol, then ultrasonically shake for 30 minutes, pour into a 500mL three-necked flask, control the stirring speed to 450rpm; combine 10 parts of styrene and 2 parts of AIBN After mixing uniformly, pour it into the above-mentioned three-necked flask at one time, under nitrogen protection, and react at 60°C for 24 hours. After centrifugation and drying, polystyrene grafted modified glass flakes are obtained.

[0040] (3) Preparation of component B

[0041] ① Mix 50 parts of polyas...

Embodiment 3

[0046] (1) Mix 70 parts of elastic isocyanate curing agent and 30 parts of aliphatic polyisocyanate trimer to obtain component A.

[0047] (2) Polystyrene grafted modified glass flakes

[0048] ① Add 100 parts of glass flakes and 1 part of silane coupling agent to the container, and mechanically stir at room temperature for 15 minutes to obtain glass flakes treated with silane coupling agent.

[0049] ② Mix 1 part of glass flakes treated with silane coupling agent, 10 parts of distilled water and 90 parts of ethanol, then ultrasonically shake for 35 minutes, pour into a 500mL three-necked flask, control the stirring speed at 500rpm; combine 10 parts of styrene and 2 parts of AIBN After mixing uniformly, pour it into the above-mentioned three-necked flask at one time, under nitrogen protection, and react at 60°C for 24 hours. After centrifugation and drying, polystyrene grafted modified glass flakes are obtained.

[0050] (3) Preparation of component B

[0051] ① Mix 60 parts of polyas...

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Abstract

The invention provides a polyaspartic acid ester finishing paint and a preparation method thereof. First, a glass flake is subjected to graft modification to enhance the interfacial adhesion between the glass flake and resin, and at the same time, the problem of high possibility of agglomeration of the glass flake is solved. By adding the modified glass flake to the resin, the bonding force between the glass flake and the resin can be improved, a cured film layer forms a solid integral film, and a polyaspartic acid ester finishing paint with good weather resistance, excellent mechanical properties, and good acid and alkali resistance, aging resistance, corrosion resistance and construction performance can be prepared.

Description

Technical field [0001] The invention belongs to the field of chemical painting, and in particular relates to a polyaspartic acid ester topcoat and a preparation method and application thereof. Background technique [0002] Poly(urea) urethane coatings have developed rapidly with the development of poly(urea) urethane synthetic chemistry and the wide application of poly(urea) urethane materials. With the continuous and rapid development of my country’s national economy and infrastructure, National key and large-scale projects have higher and higher requirements for long-term use. The coatings are required to have excellent weather resistance, good acid, alkali and salt corrosion resistance and wear resistance, as well as good decoration and workability. [0003] At present, the two-component aliphatic polyurethane coatings on the market are slow to cure and crosslink at room temperature and are easily affected by the environment. It is necessary to add an appropriate amount of heavy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D177/00C09D5/08C09D7/65C09D7/61
CPCC08K2003/321C09D5/08C09D7/61C09D7/65C09D177/00C08L51/10C08K3/32
Inventor 杨敏辉卞庆娅崔国鹏刘政超
Owner SHANGHAI ZHENHUA HEAVY IND CHANGZHOU COATINGS CO LTD
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