CN104098961A

CN104098961A - Self-crosslinking aqueous woodenware primer

Info

Publication number: CN104098961A
Application number: CN201310125967.8A
Authority: CN
Inventors: 刘宗惠; 张文彬; 方春福; 张成达
Original assignee: YUANJIAN INDUSTRIAL Co Ltd SICHUAN PROV
Current assignee: YUANJIAN INDUSTRIAL Co Ltd SICHUAN PROV
Priority date: 2013-04-12
Filing date: 2013-04-12
Publication date: 2014-10-15

Abstract

The invention relates to a self-crosslinking aqueous woodenware primer. A preparation method of the primer comprises the following steps: carrying out emulsion polymerization on 15-30% of a hard monomer, 15-30% of a soft monomer and 5-10% of a functional monomer under the action of water, an emulsifier, an initiator and a buffering agent through a pre-emulsifying technology to form an acrylic emulsion with a self-crosslinking function, and mixing the emulsion with various auxiliary materials and functional assistants to prepare the aqueous primer with excellent performances. The introduction of the preferable functional monomer in polymerization makes the obtained self-crosslinking polymer have a special functional group structure, so crosslinking after the addition of other functional assistants improves the hardness and the chemical resistance of a film. The self-crosslinking aqueous woodenware primer has the characteristics of fast film formation, high hardness, easy polishing, acid resistance and oil resistance, can form effective closure to oil-permeable acid return timber with difficult aqueous paint applicability, like pine wood, cedar wood and cottonwood, and has wide application range and wide application prospect.

Description

Self-crosslinking aqueous woodenware priming paint

Technical field

The invention belongs to water-borne coatings field, more specifically a kind of coating and manufacturing processed that relates to woodenware priming paint.

Background technology

The existing application development for many years of solvent-borne type synthetic resins wood lacquer is historical, what use was more at present is unsaturated polyester varnish (PE paint), polyurethane paint (PU paint) etc., these paint advantages are obvious, but shortcoming is outstanding, as PE paints easy embrittlement, cracking, PU paint may cause xanthochromia, more inevitably these solvent-thinned paints are all accompanied by the volatilization of organic solvent in construction and use procedure, contained toluene wherein, dimethylbenzene etc. even may have carcinogenesis, other contained organic solvent also can be to nerve system of human body, blood system forms harm, this will have a strong impact on the healthy of workmen, and user's health is formed to potential hazard, a large amount of organic solvent volatilizations have caused great waste and serious environmental pollution.People to the situation of healthy and environment protection growing interest under, aqueous woodware paint arises at the historic moment and slowly develops.Cause aqueous woodware paint tempo slowly major cause be that water-miscible paint ubiquity repainting hours is long, return the sticky polishing that is difficult for, the problem such as chemical resistance is poor, the large-scale popularization that has affected water-miscible paint is used.

Summary of the invention

The object of the present invention is to provide a kind of can widely used high-performance water-based woodenware priming paint, apply this woodenware priming paint and not only can overcome the ubiquitous defect of current aqueous wooden ware priming paint, in some performance, even surmount the performance of solvent-thinned paint, for reaching this object, the present invention adopts following technical scheme:

(1) adopt the synthetic self-crossing emulsion of letex polymerization and pre-emulsification technology, the composition of this emulsion and weight percent are:

Hard monomer: 15%～30%

Soft monomer: 15%～30%

Self-cross linking monomer: 5%～10%

Emulsifying agent: 1%～2.5%

Initiator: 0.1%～0.5%

Sodium bicarbonate: 0.1%～0.5%

Deionized water: 50%～70%

PH adjusting agent: 0.5%～2%

In above-mentioned constituent, hard monomer is vinylbenzene, methyl methacrylate, acrylamide, one or more mixtures in methyl acrylate, soft monomer is butyl acrylate, ethyl propenoate, 1～2 kind of Octyl acrylate, self-cross linking monomer is vinylformic acid, methacrylic acid, N hydroxymethyl acrylamide, Hydroxyethyl acrylate, the mixture of one or more in glycidyl methacrylate, emulsifying agent is nonylphenol polyethylene ether, Sodium dodecylbenzene sulfonate, in sodium lauryl sulphate 1～2 kind, initiator is ammonium persulphate, one or both of Potassium Persulphate, pH adjusting agent is ammoniacal liquor or organic amine.

(2) coordinate other functional agent to carry out paint the self-crossing emulsion of above-mentioned composition polymerization, to obtain better application performance, its basic step is:

Pack emulsion into paint mixing cylinder, use pusher stirring, governing speed, at 300～1000 revs/min, progressively adds each component by following weight percent:

Self-crosslinking acrylic emulsion: 40%～95%

Defoamer: 0.5%～1.5%

Film coalescence aid: 3%～8%

Wetting agent: 0.5%～2.5%

Dispersion agent: 0～2.5%

Filler: 0～50%

Sterilant: 0.5%～1.5%

Auxiliary rheological agents: 0.5%～2.5%

Water: 0～20%

Functional agent: 0.5%～4%

In above component, defoamer is one or both mixture of silicone based and mineral oils, film coalescence aid adopts Lauryl Alcohol ester, butyl glycol ether, propandiol butyl ether, dipropylene glycol methyl ether, dipropylene glycol ether, the mixture of one or more in dipropylene glycol butyl ether, wetting agent is polyether silicone class, acetylenic diols, the mixture of one or more in silicone based, dispersion agent is metal carboxylate dispersion agent, filler is glass powder, talcum powder, calcium carbonate, titanium dioxide, one or more in thermal silica, sterilant is isothiazolinone, auxiliary rheological agents comprises flow agent, inorganic thickening agent, cellulose family, the mixture of one or more in polyacrylic ester and association type polyurethane thickener, functional agent is silane coupling agent, titanate coupling agent, water-based polyisocyanic acid ester dispersion, one or more mixtures in carbodiimide.

Regulate paint liquid to suitable use viscosity, through 300 orders, filter and get final product product.

Compare with existing aqueous priming paint, the advantage that the priming paint that the present invention makes has is: by introduce preferred function monomer in polymerization, make self-crosslinking polymer also with special structure of functional groups, thereby can be again crosslinked when adding other functional agent, to improve hardness and the chemical resistance of paint film, there is film forming fast, hardness is high, easily polishing, the characteristic of acid-proof oil resistant, the timber that original water-miscible paint is difficult to use is as pine, cypress, poplar, the easy oil impregnate such as toon returns sour timber all can form effectively sealing, applicable surface is wider, be with a wide range of applications.

Embodiment

By specific embodiment, come below that the invention will be further described

Embodiment 1

Condenser is being housed, feeding device, in the reactor of temperature inductor, add 50 parts of deionized waters, 1 part of emulsifier op-10, 1 part of K12, stir, get 30 parts of emulsifier solutions and slowly add successively 1.5 parts of glycidyl acrylates in another reactor, 1.5 parts of N hydroxymethyl acrylamides, 1 part of vinylformic acid, 1.5 parts of Hydroxyethyl acrylates, 16 parts of vinylbenzene, 13 parts of butyl acrylates, 4 parts of ethyl propenoates, stir and within 20 minutes, make pre-emulsion, separately get 9 parts of deionized waters, 0.25 part of ammonium persulphate, 0.25 part of sodium bicarbonate is made into initiator solution, reactor is warmed up to 70 ℃～90 ℃, add 3.5 parts initiator solution, after 15 minutes, start evenly to drip pre-emulsion and remaining initiator, time is 2.5 hours, finally be warmed up to 90 ℃, react 1.5 hours, cool to 45 ℃, add 1 part of 25% ammonia soln, regulating pH is 7～8, 250 orders filter discharging, can obtain paint emulsion, this emulsion is transferred in paint mixing cylinder, adopt pusher stirring, with the rotating speeds of 300 revs/min, progressively add 0.5 part of defoamer, 5 parts of film coalescence aid, 1 part of wetting agent, 1 part of dispersion agent, 0.2 part of sterilant, 0.5 part of auxiliary rheological agents, 1 part of silane coupling agent, finally stir 20 minutes, adopt 300 orders to filter discharging and obtain this product.

Embodiment 2

Condenser is being housed, feeding device, in the reactor of temperature inductor, add 50 parts of deionized waters, 1 part of emulsifier op-10, 1 part of K12, stir, get 30 parts of emulsifier solutions and slowly add successively 1.5 parts of glycidyl acrylates in another reactor, 1.5 parts of N hydroxymethyl acrylamides, 1 part of vinylformic acid, 1.5 parts of Hydroxyethyl acrylates, 15 parts of vinylbenzene, 16 parts of butyl acrylates, 2 parts of methyl methacrylates, stir and within 20 minutes, make pre-emulsion, separately get 9 parts of deionized waters, 0.25 part of ammonium persulphate, 0.25 part of sodium bicarbonate is made into initiator solution, reactor is warmed up to 70 ℃～90 ℃, add 3.5 parts initiator solution, after 15 minutes, start evenly to drip pre-emulsion and remaining initiator, time is 2.5 hours, finally be warmed up to 90 ℃, react 1.5 hours, cool to 45 ℃, add 1 part of 25% ammonia soln, regulating pH is 7～8, 250 orders filter discharging, can obtain paint emulsion, this emulsion is transferred in paint mixing cylinder, adopt pusher stirring, with the rotating speeds of 300 revs/min, progressively add 0.5 part of defoamer, 5 parts of film coalescence aid, 1 part of wetting agent, 1 part of dispersion agent, 0.2 part of sterilant, then mixing speed is adjusted to 800 revs/min, progressively add 10 parts of Paris whites, 5 parts of talcum powder, 10 parts of titanium dioxides, 10 parts of water, 0.5 part of auxiliary rheological agents, 1.5 parts of silane coupling agents, finally stir 20 minutes, adopt 300 orders to filter discharging and obtain this product.

Claims

1. a self-crosslinking aqueous woodenware priming paint, is characterized in that adopting self-crosslinking acrylic emulsion and various application function auxiliary agent to form, the material that it comprises following component:

Self-crosslinking acrylic emulsion: 40%～95%

Defoamer: 0.5%～1.5%

Film coalescence aid: 3%～8%

Wetting agent: 0.5%～2.5%

Dispersion agent: 0～2.5%

Filler: 0～50%

Sterilant: 0.5%～1.5%

Auxiliary rheological agents: 0.5%～2.5%

Water: 0～20%

Functional agent: 0.5%～4%.

2. self-crosslinking aqueous woodenware priming paint according to claim 1, is characterized in that self-crosslinking acrylic emulsion adopts 15%～30% hard monomer, 15%～30% soft monomer, 5～10% function monomer, at water, emulsifying agent, initiator, is polymerized under the effect of buffer reagent.

3. self-crosslinking aqueous woodenware priming paint according to claim 1, is characterized in that defoamer is silicone based and one or both mixture of mineral oils.

4. self-crosslinking aqueous woodenware priming paint according to claim 1, is characterized in that film coalescence aid adopts Lauryl Alcohol ester, butyl glycol ether, propandiol butyl ether, dipropylene glycol methyl ether, dipropylene glycol ether, the mixture of one or more in dipropylene glycol butyl ether.

5. self-crosslinking aqueous woodenware priming paint according to claim 1, is characterized in that wetting agent is polyether silicone class, acetylenic diols, the mixture of one or more in silicone based.

6. self-crosslinking aqueous woodenware priming paint according to claim 1, is characterized in that dispersion agent is metal carboxylate dispersion agent.

7. self-crosslinking aqueous woodenware priming paint according to claim 1, is characterized in that filler is glass powder, talcum powder, calcium carbonate, titanium dioxide, one or more in thermal silica.

8. self-crosslinking aqueous woodenware priming paint according to claim 1, is characterized in that sterilant is isothiazolinone.

9. self-crosslinking aqueous woodenware priming paint according to claim 1, is characterized in that auxiliary rheological agents is one or more the mixture in flow agent, inorganic thickening agent, cellulose family, polyacrylic ester and association type polyurethane thickener.

10. self-crosslinking aqueous woodenware priming paint according to claim 1, is characterized in that functional agent is silane coupling agent, titanate coupling agent, water-based polyisocyanic acid ester dispersion, one or more mixtures in carbodiimide.