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Polyurea polyaspartic acid ester paint raw material composition, paint from same and preparation and application methods thereof

A technology of aspartate and raw material composition, applied in the direction of polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of unsuitability for small-area construction, short polyurea gel time, unstable color, etc. , to achieve the effect of good tolerance, color stability, and wide adjustable range

Inactive Publication Date: 2019-03-19
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to overcome the traditional spraying polyurea gel time is too short, not suitable for small area construction and poor weather resistance, color instability and easy yellowing and other problems, thereby providing a polyurea polyaspartate coating, Raw material composition and its application

Method used

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  • Polyurea polyaspartic acid ester paint raw material composition, paint from same and preparation and application methods thereof
  • Polyurea polyaspartic acid ester paint raw material composition, paint from same and preparation and application methods thereof

Examples

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preparation example Construction

[0040] The raw materials for the preparation of the prepolymer include: 60%-80% of polymer polyols, 19.5%-39.9% of aliphatic isocyanate, and 0.1%-0.5% of catalysts, and the percentages are the weight of each component. The mass percentage of the raw materials for the preparation of the prepolymer, the sum of the percentages of each component is 100%;

[0041] The polymer polyol is selected from polyether polyol (such as DL-2000, DL-1000), polyester polyol (such as PCD-N963, PCD-N964, F1700, F1190, PCL) and polytetrahydrofuran polyol (such as One or more of PTMG-2000), the polymer polyol has a functionality of 2 and a number average molecular weight of 1000 to 5000;

[0042] Described isocyanate is selected from HDI, H 12 One or more of MDI, IPDI, HDI trimer, IPDI trimer, preferably HDI and IPDI;

[0043] The catalyst is an organotin catalyst, preferably T9 or T12;

[0044] The raw materials for the preparation of the polyamine include: 37%-80% polyaspartic acid ester resin,...

Embodiment 1

[0066] (1) Preparation of NCO-terminated prepolymer

[0067] In terms of mass percentage, add 80% PCD N-963 and heat up to 105°C, dehydrate under negative pressure -0.095MPa for 1h, then cool down to 60°C, add 19.5% HDI and 0.5% T12, stir and disperse, then heat up to 75°C, Fully react for 2 hours and cool down to 55°C, filter and discharge to obtain a prepolymer.

[0068] (2) Preparation of polyamine

[0069] In terms of mass percentage, first add 50% of Desmophen NH 1420, 27% of titanium dioxide, 5% of anti-corrosion pigments, 5% of molecular sieves, 1.5% of BYK-110, 1.2% of BYK-066N and 0.3% of GARAMATE- In 1958, use a high-speed disperser to quickly disperse for 45 minutes, then add 5% butyl acetate and 5% propylene glycol methyl ether acetate, continue to disperse at a high speed for 40 minutes, and discharge after standing for 5 minutes to obtain polyamine.

[0070] (3) Preparation of polyurea-type polyaspartate paint coating

[0071] Mix the prepolymer in (1) and the...

Embodiment 2

[0073] (1) Preparation of NCO-terminated prepolymer

[0074] In terms of mass percentage, add 70% of F1700 and heat up to 105°C, negative pressure -0.095MPa for dehydration for 1h, then cool down to 60°C, add 29.9% of IPDI and 0.1% of T12, stir and disperse, then heat up to 75°C, fully react for 3h Cool down to 55°C, filter and discharge to obtain prepolymer.

[0075] (2) Preparation of polyamine

[0076] In terms of mass percentage, first add 40% of Desmophen NH 1420, 30% of titanium dioxide, 5% of anti-corrosion pigments, 5% of molecular sieves, 3.2% of BYK-110, 1.5% of BYK-066N and 0.3% of GARAMATE- In 1958, use a high-speed disperser to quickly disperse for 45 minutes, then add 5% butyl acetate and 10% propylene glycol methyl ether acetate, continue to disperse at a high speed for 40 minutes, and discharge after standing for 5 minutes to obtain polyamine.

[0077] (3) Preparation of polyurea-type polyaspartate paint coating

[0078] Mix the prepolymer in (1) and the pol...

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Abstract

The invention relates to a polyurea polyaspartic acid ester paint raw material composition. The polyurea polyaspartic acid ester paint raw material composition comprise a NCO-end-capped prepolymer anda polyamine at a weight ratio of 1:0.8-1.6; the NCO-end-capped prepolymer is prepared from raw materials including 60-80% of polymer polyols, 19.5-39.9% of aliphatic isocyanate and 0.1-0.5% of catalysts; the polyamine is prepared from 37-80% of polyaspartic acid ester resin, 10-40% of filler, 1-5% of wetting dispersant, 0.5-2% of defoamer, 0.1-1% of anti-settling auxiliaries and 0-15% of solvent.The invention also relates to a polyurea polyaspartic acid ester paint, a preparation method of the polyurea polyaspartic acid ester paint and application of the polyurea polyaspartic acid ester paint to preparing surface protecting surface coatings and various base material waterproof and anti-corrosive coatings. The prepared polyurea polyaspartic acid ester paint is adjustable in gelation timeand solid content, good in ultraviolet tolerance, durable in gloss, stable in color and capable of avoiding yellowing.

Description

technical field [0001] The application relates to the technical field of coatings, in particular, the application relates to a polyurea type polyaspartic ester coating raw material composition, which is derived from the polyurea type polyurea type polyaspartic acid ester coating raw material composition Polyaspartic acid ester coating, preparation method of polyurea type polyaspartic acid ester coating and polyurea type polyaspartic acid ester coating in preparing surface protective surface coating and various substrate waterproof anticorrosion coatings application. Background technique [0002] Spray polyurea elastomer is widely used in waterproof and anti-corrosion fields such as high-speed rail, underground engineering, coastal engineering, and large playgrounds because of its high solid content, non-toxic and environmentally friendly, fast curing, and strong mechanical properties. However, the reaction time of spraying polyurea coatings is too fast, and special spraying...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D5/08C09D7/61C08G18/64C08G18/48C08G18/42C08G18/10
CPCC08G18/10C08G18/4018C08G18/42C08G18/4202C08G18/4854C08G18/6438C08K2003/2241C09D5/08C09D7/61C09D7/70C09D175/02C08K13/04C08K3/22C08K7/24
Inventor 刘雨杜辉董建国
Owner SHANGHAI DONGDA CHEM
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