Waterborne paint composition, preparation method and application thereof

A technology of water-based coatings and compositions, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems that the gloss is difficult to reach the same level as solvent-based, unfavorable for large-scale construction, low gloss of the coating film, etc., to achieve excellent appearance and low price Moderate, high gloss effect

Inactive Publication Date: 2018-01-26
NIPPON PAINT IND COATINGS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Because the gloss of most water-based acrylic resins on the market is difficult to reach the same level as solvent type, and the miscibility of water-based polyurethane curing agent with water and water-based acrylic resin is relatively poor, the gloss of the obtained coating film is low
[0006] 2. Poor weather resistance
[0009] Because the polyurethane curing agent itself can react with water, and is affected by the acrylic resin, PH, additives, co-solvents, etc. of the paint, many water-based topcoats on the market have an activation period of less than 2 hours, and some are even less than 1 hour, which is very unsuitable. Facilitate large-scale construction

Method used

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  • Waterborne paint composition, preparation method and application thereof
  • Waterborne paint composition, preparation method and application thereof
  • Waterborne paint composition, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] (1) Evenly mix the following components with a mixer: (The following components are all calculated in parts by weight)

[0095]

[0096] (2) Then use a sand mill to perform sanding until the fineness is below 10um, and add the following components:

[0097]

[0098] The above components are mixed evenly at high speed as component A.

[0099] (3) Evenly mix the following components with a mixer:

[0100] 20.0 parts of propylene glycol diacetate,

[0101] Bayhydur XP 2655 modified polyurethane curing agent 80.0 parts,

[0102] Stir well to obtain component B.

[0103] The A component and the B component are respectively sealed and packaged in a packaging tank for later use to obtain the water-based coating composition and avoid being exposed to the air.

[0104] The A component and the B component are mixed in a ratio of 100:24 parts by weight, and the coating is obtained after coating and crosslinking.

[0105] The mixing ratio of the A component and the B component is selected accord...

Embodiment 2

[0107] (1) Evenly mix the following components with a mixer: (The following components are all calculated in parts by weight)

[0108]

[0109] (2) Then use a sand mill to perform sanding until the fineness is below 10um, and add the following components:

[0110]

[0111] The above components are mixed evenly at high speed as component A.

[0112] (3) Evenly mix the following components with a mixer:

[0113] 20.0 parts of propylene glycol diacetate,

[0114] Bayhydur XP 2655 modified polyurethane curing agent 80.0 parts,

[0115] Stir well to obtain component B.

[0116] The A component and the B component are respectively sealed and packaged in a packaging tank for later use to obtain the water-based coating composition and avoid being exposed to the air.

[0117] The A component and the B component are mixed in a ratio of 100:21 parts by weight, and the coating is obtained after coating and crosslinking.

[0118] The mixing ratio of the A component and the B component is selected as A:B...

Embodiment 3

[0120] (1) Evenly mix the following components with a mixer: (The following components are all calculated in parts by weight)

[0121]

[0122] (2) Then use a sand mill to perform sanding until the fineness is below 10um, and add the following components:

[0123]

[0124] The above components are mixed evenly at high speed as component A.

[0125] (3) Evenly mix the following components with a mixer:

[0126] 20.0 parts of propylene glycol diacetate,

[0127] Bayhydur XP 2655 modified polyurethane curing agent 80.0 parts,

[0128] Stir well to obtain component B.

[0129] The A component and the B component are respectively sealed and packaged in a packaging tank for later use to obtain the water-based coating composition and avoid being exposed to the air.

[0130] The A component and the B component are mixed in a ratio of 100:17.5 parts by weight, and the coating is obtained after coating and crosslinking.

[0131] The mixing ratio of the A component and the B component is selected acco...

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Abstract

The invention discloses a waterborne paint composition. The waterborne paint composition includes the following components by weight: a component A, which includes, by weight, 40.0-70.0 parts of highhydroxyl value water dispersible acrylate resin, 10.0-40.0 parts of a pigment, and 3.6-22.0 parts of a polymer science acceptable paint additive; and a component B, which includes, by weight, 65.0-100.0 parts of a modified polyurethane curing agent. The waterborne paint composition provided by the invention has the advantages of high gloss, good weatherability, long activation period, room temperature curability and environment-friendliness, when cooperating with an appropriate cosolvent, a wetting agent and a defoaming agent, a waterborne paint composition with good adhesion, storability andother performance can be further obtained. The waterborne paint composition has good storage stability, has all properties meeting the requirements of current solvent based paint, has moderate price,and can adapt to the needs of domestic market.

Description

Technical field [0001] The invention belongs to the technical field of paint preparation, and specifically relates to an aqueous paint composition, a preparation method and an application thereof. Background technique [0002] At present, the coating of construction machinery and rail transit vehicle bodies requires the following steps: pretreatment, primer, intermediate coating, and topcoat. The coatings used are basically solvent-based coatings. The large amount of solvent emissions caused by the solvent contained in solvent-based coatings will cause serious environmental pollution. When VOC emissions are concerned in all aspects, construction machinery and rail transit vehicle body coatings must be water-based. [0003] A few manufacturers have begun to use water-based topcoats, but the development is relatively slow. Compared with solvent-based coatings, there are more common problems in water-based topcoats: [0004] 1. Low gloss. [0005] Because most of the commercially avail...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/63C09D7/65C08G18/62
Inventor 秦玉猛王位徐俊
Owner NIPPON PAINT IND COATINGS SHANGHAI
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