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High solid content and economical tannic acid resistant two-component white environment-friendly waterborne primer

A water-based primer, economical technology, applied in primers, coatings, polyurea/polyurethane coatings, etc., can solve the problems of high VOC content, poor sealing, white primer precipitation, etc., and achieve anti-tannin Improve acid performance, improve construction convenience, and paint film performance

Inactive Publication Date: 2018-12-07
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low hardness and poor filling properties of traditional one-component wood coatings, especially in winter, it is not easy to apply at low temperatures, and problems such as cracking of the paint film are prone to occur after construction, so it is difficult to popularize and apply on a large scale, and the traditional one-component water-based When the white primer is applied to the uneven sealing coating due to the problems of low solid content and poor sealing performance, the following problems often occur: multiple sprayings are required to achieve a fully sealing effect, which directly results in increased construction costs and Poor sealability for wood that is prone to yellowing (red oak); some two-component white primers have good performance but are expensive, and customers do not accept them, and there are also problems such as poor storage stability, and a large amount of white primers appear in a period of time. Consumers want to reduce the number of constructions to reduce costs while ensuring sealing
[0004] 1) The existing paints are mainly solvent-based, and the problems of high VOC content, serious pollution and fire hazards need to be solved; 2) The existing water-based two-component wood coatings have poor hand-stirring properties after adding curing agents and short pot life Problems; 3) The existing water-based two-component wood coatings lead to a straight rise in construction costs due to the large amount of curing agent added; 4) There is still a certain gap in the fullness and filling of existing water-based wood coatings compared with solvent-based products. Resulting in poor decorative effect; 5) Existing paints seldom consider the sealing effect on yellowing plates

Method used

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  • High solid content and economical tannic acid resistant two-component white environment-friendly waterborne primer
  • High solid content and economical tannic acid resistant two-component white environment-friendly waterborne primer
  • High solid content and economical tannic acid resistant two-component white environment-friendly waterborne primer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Preparation of component A: Step a: Preparation of white pulp: add 1% quick and easy to 5% deionized water for medium-speed dispersion for 10 minutes, then add 0.1% dimethylethanolamine and continue to disperse for 5 minutes, then add 0.4% BYK-024 Disperse at high speed for 10 minutes, then add 45% domestic rutile titanium dioxide and disperse at high speed for 15 minutes, and finally put the mixture into a grinder to grind until the fineness is ≤20 μm, and set aside;

[0075] Step b: Add 30% Opeldi AC31 and 7% Covestro A2601 into another new stock pot, add a mixture of 0.2% dimethylethanolamine and 0.2% deionized water at a medium speed, and disperse at a medium speed for 5 Minutes to make emulsion;

[0076] Step c: Add 0.4% BKY-024 and 0.3% BKY-346 to the emulsion prepared in step b and disperse at high speed for 10 minutes to prepare mixed solution c for later use;

[0077] Step d: Add the white slurry prepared in step a to the mixed solution c and disperse at a med...

Embodiment 2

[0081] Preparation of component A: Step a: Preparation of white pulp: add 2% Tego755W to 8% deionized water for medium speed dispersion for 15 minutes, then add 0.2% AWP-95 and continue dispersion for 10 minutes, then add 0.6% TEG0902W at high speed Disperse for 15 minutes, then add 50% 1250 mesh talc powder and disperse at high speed for 20 minutes, and finally put the mixture into a grinder to grind until the fineness is ≤20 μm, and set aside;

[0082] Step b: Add 40% AC2598 and 10% XP2755 of Oubaodi to another new stock pot, add a mixture of 0.3% AWP-95 and 0.3% deionized water at a medium speed, and disperse at a medium speed for 5 minutes to obtain Lotion;

[0083] Step c: Add 0.6% TEG0810 and 0.5% TEG0270 to the emulsion prepared in step b and disperse at high speed for 15 minutes to prepare mixed solution c for later use;

[0084] Step d: Add the white slurry prepared in step a to the mixed solution c and disperse at a medium speed for 20 minutes; then add 3% deionized...

Embodiment 3

[0088] Preparation of component A: Step a: Preparation of white pulp: add 1.5% quick and easy to 6.5% deionized water for medium speed dispersion for 10 minutes, then add 0.15% dimethylethanolamine and continue to disperse for 10 minutes, then add 0.5% TEG0810 for high speed dispersion After 10 minutes, add 47% 1250 mesh talc powder to disperse at high speed for 20 minutes, and finally put the mixture into a grinder to grind to a fineness of ≤20 μm, and set aside;

[0089] Step b: Add 35% DSM XK103 and 8.5% Covestro A2601 into another new stock pot, add the mixture of 0.2% AMP-95 and 0.2% deionized water at medium speed, and disperse at medium speed for 5 minutes , to prepare the emulsion;

[0090] Step c: Add 0.5% TEG0810 and 0.4% TEG0270 to the emulsion prepared in step b and disperse at high speed for 10 minutes to prepare mixed solution c for later use;

[0091] Step d: Add the white slurry prepared in step a to the mixed solution c and disperse at a medium speed for 20 m...

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Abstract

The invention discloses a high solid content and economical tannic acid resistant two-component white environment-friendly waterborne primer. The preparation method includes: adding a dispersant intodeionized water and performing dispersion, then adding a PH regulator, then adding a defoamer and conducting high speed dispersion, then adding solid powder and performing high speed dispersion; adding a water-based hydroxyl acrylic emulsion and a waterborne polyurethane polyol dispersion into another new material preparation pot, and adding a mixture of a neutralizer and deionized water at an intermediate speed to obtain an emulsion; adding a defoamer and a wetting leveling agent into the emulsion and performing high speed dispersion so as to obtain a mixed solution c for standby use; addinga prepared white pulp into the mixed solution c, then adding deionized water and a rheological assistant to obtain a component A; mixing water dispersed isocyanate and a cosolvent evenly to obtain a component B; and mixing the component A and the component B evenly in a proportion of 10:1, thus obtaining the environment-friendly waterborne primer. The waterborne primer prepared according to the invention has the advantages of low cost, good environmental protection effect, good stability and strong practicability.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a high-solid-content, economical anti-tannic acid two-component white environmental-friendly water-based primer. Background technique [0002] With people's increasing requirements for environmental protection and health, as well as the continuous improvement and strengthening of domestic and foreign environmental protection laws and regulations, water-based wood coatings have attracted more and more attention. Water-based wood coatings are a type of coating with water as the dispersion medium. They have the advantages of non-combustibility, non-toxicity, no pollution to the environment, and energy saving. The market prospect is broad. However, due to the low hardness and poor filling properties of traditional one-component wood coatings, especially in winter, it is not easy to apply at low temperatures, and problems such as cracking of the paint film are prone to occur after construction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/65
CPCC08K2003/2241C08L2205/025C08L2312/00C09D5/002C09D175/04C09D7/61C09D7/65C08L75/04C08K13/02C08K3/22C08K3/34
Inventor 周通通杨远闫会玲张文东李璠
Owner HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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