CN101659825A - Double-component aqueous nano scratch resistant wood coating and method for producing same - Google Patents

Abstract

The invention provides a double-component aqueous nano scratch resistant wood coating and a method for producing the same. The wood coating comprises an A component and a B component, wherein the B component consists of the following raw materials in percentage by weight: 75 to 90 percent of aqueous nano resin, 0.1 to 1 percent of defoamer, 0 to 3 percent of dulling agent, 0.1 to 1 percent of thickener, 1 to 5 percent of film-forming assistant, 0.1 to 0.5 percent of wetting agent, 1 to 5 percent of aqueous nano scratch resistant agent, 1 to 5 percent of aqueous nano wax emulsion, 0.1 to 0.3 percent of pH adjusting agent, and 1 to 5 percent of water. The double-component aqueous nano scratch resistant wood coating has the advantages that: the wood coating is low in VOC, almost tasteless anddiluted by water; and except good physicochemical properties, the wood coating also has extremely good scratch resistance.

Description

Double-component aqueous nano scratch resistant wood coating and production method thereof

Technical field

The present invention relates to a kind of bi-component waterborne woodwork coating, but refer in particular to a kind of water decentralized polymeric polyisocyanate solidified bi-component waterborne woodwork coating and production method thereof under normal temperature condition of making.

Technical background

Water-borne wood coating is the inevitable direction of of coating development, but because the water-borne wood coating rate of drying is slow, filming seldom has crosslinked or reason such as cross-linking density is less, the physical and chemical performance and the solvent based coating that cause water-borne wood coating to be filmed have bigger gap, are especially influencing its development largely aspect hardness and the scratch resistance performance.Particularly in the field of furniture of some higher gears, the better hardness that requires to have filmed also will have resistance to marring preferably outward, and this makes water-borne wood coating make slow progress in a field.Although a lot of researchists turn to the bi-component waterborne woodwork coating to sight, by adding waterborne curing agent, increase the cross-linking density of filming and improve the physical and chemical performance of filming, this physical and chemical performance of filming than mono-component aqueous woodwork coating has had large increase, but still also has some gaps with solvent based coating.The present invention is further enhanced the film performance of water-borne wood coating, to satisfy the higher scratch resistance requirement of field of furniture by adding nano material.

Chinese patent CN101016431 discloses " a kind of nano antibacterial water woodenware paint and preparation method thereof ", this patent aqueous woodware paint is a single component, nano material is to use as a kind of anti-biotic material, focuses on a technology difficult problem that solves free settling in the common inorganic antiseptic process of manufacture, easy to change and easy reunion.But the defective that this patent exists is that resistance to marring is poor.

Summary of the invention

The purpose of this invention is to provide a kind of double-component aqueous nano scratch resistant wood coating and production method thereof, to overcome the defective of the resistance to marring difference that existing water-borne wood coating exists.

The said double-component aqueous nano scratch resistant wood coating of the present invention comprises two components of first component and second, and second weight percentages of components component is:

Water nano resin 75%～90%;

Defoamer 0.1%～1.0%

Matting agent 0～3%

Thickening material 0.1%～1.0%

Film coalescence aid 1%～5%

Wetting agent 0.1%～0.5%

Aqueous nano scratch resistant agent 1%～5%

Water nano wax emulsion 1%～5%

PH conditioning agent 0.1%～0.3%

Water 1%～5%

Above-mentioned each percentages of ingredients sum is 100%.

But the first component is a water decentralized polyisocyanate curing agent, and weight consumption is 10%～20% of a second component gross weight;

Said water nano resin contains-OH base water nano acrylate copolymer or contain-OH base aqueous nano polyurethane dispersion, but it mainly acts on and is and water decentralized polyisocyanate curing agent generation crosslinking reaction, weight contains 30%～50% admittedly, can adopt the POD6251 of east, Shaanxi science and technology of aviation company limited;

The preferred polysiloxane-polyether copolymer of described defoamer, the trade mark that can adopt TEGO company is the product of TEGO810;

The preferred nanometer titanium dioxide silicon-type of described matting agent, the trade mark that can adopt Shanghai He Shi wall company is the product of CC300;

Described thickening material is one or both in the association type polyurethane thickener, and its chemical composition is roughly association type urethane, can adopt the PU40 of German bright icepro company;

Described film coalescence aid can for more environmental protection, can adopt the propylene glycol kind solvent for alcohol ether kind solvent or alkoxide solvent, as the dipropylene glycol butyl ether (DPnB) of U.S. DOW company;

The preferred polysiloxane-polyether copolymer of described wetting agent, the trade mark that can adopt TEGO company is the product of TEGO245; Said defoamer and wetting agent are polysiloxane-polyether copolymer, and still, difference wherein is that the former wetting ability is poor, and latter's wetting ability will be got well;

Described aqueous nano scratch resistant agent, its main component are nano-aluminium oxide, and average nanometer particle size is 10～30nm, as the NMA-1 of Beijing initiative nanometer company;

Described water nano wax emulsion, the feel of filming with improvement is as 5001 oxidic polyethylene nanometer paraffin wax emulsion of Fushun Wen Ai company;

Described pH value conditioning agent, pH value conditioning agent is a 2-amino-2-methyl-1-propanol, as the AMP-95 of U.S. Mykrolis Corp;

But described water decentralized polyisocyanate curing agent is IPDI type or HDI type, and it is 50%～100% that weight contains admittedly, can adopt the Bayhydur XP2655 of German BAYER company.

Making method of the present invention comprises the steps:

(1) at first the water nano resin is added in the container, under agitation add defoamer, dispersed with stirring;

(2) secondly add matting agent and thickening material, and dispersed with stirring;

(3) add film coalescence aid, wetting agent, aqueous nano scratch resistant agent, water nano wax emulsion and pH regulator agent then, dispersed with stirring is adjusted viscosity to 70～90KU/25 ℃ with thickening material and water at last and is promptly obtained product.

Using method of the present invention is to brush or spraying.

Double-component aqueous nano scratch resistant wood coating of the present invention has following advantage: low VOC, and almost tasteless, dilute with water, ambient cure is filmed except good physical and chemical performance is arranged, and also has fabulous resistance to marring.

Embodiment

Among the embodiment, if no special instructions, all be weight percentage.

Embodiment 1

Second component raw-material weight per-cent is as follows:

Water nano resin POD6250 83.0%

Defoamer TEGO810 0.3%

Matting agent CC300 1.2%

Thickening material PU40 0.3%

Film coalescence aid DPnB 3%

Wetting agent TEGO245 0.2%

Nano scratch resistant agent NMA-1 5%

Water nano wax emulsion 5,001 3%

PH value conditioning agent AMP-95 0.2%

Water 3.8%

100％

First component: Bayhydur XP2655 15%;

POD6251 is for containing-OH water nano ACRYLIC EMULSION, and weight contains 35% admittedly;

But Bayhydur XP2655 is the water decentralized polyisocyanate curing agent of German BAYER company.

Concrete making processes is:

(1) at first the water nano resin is added in the container, under agitation add defoamer, dispersed with stirring;

(2) secondly add matting agent and thickening material, and dispersed with stirring;

(3) add film coalescence aid, wetting agent, aqueous nano scratch resistant agent, water nano wax emulsion and pH regulator agent then, dispersed with stirring is adjusted viscosity with thickening material and water at last and is promptly obtained product to 80KU/25 ℃.

Detected result is as follows:

Solid content: 33.2% GB/T 1725-79 (second method)

Outward appearance: oyster white semi-fluid GB 1727-79

First, second two portions mix method system film, maintenance and the test of back by requirement among the HG/T 3828-2006 " indoor water-borne wood coating ".

Performance Detection is as follows:

Pencil hardness: H ISO 15184:1998

Sticking power: 1 GB/T 9286

Shock-resistant: 40cm.kg ISO6272-2:2002

Damage resistant (100g): do not scratch GB/T 9279-88.

Embodiment 2

Prescription:

Water nano resin 79%

Defoamer 1.0%

Matting agent 2.2%

Thickening material 1%

Film coalescence aid 5%

Wetting agent 0.5%

Aqueous nano scratch resistant agent 1%

Water nano wax emulsion 5%

PH conditioning agent 0.3%

Water 5%

The trade mark of raw material is with embodiment 1.

The preparation method is with embodiment 1.

First component: Bayhydur XP2655 10%.

Detected result is as follows:

Solid content: 34.5% GB/T 1725-79 (second method)

Outward appearance: oyster white semi-fluid GB 1727-79

First, second two portions mix method system film, maintenance and the test of back by requirement among the HG/T 3828-2006 " indoor water-borne wood coating ".

Performance Detection is as follows:

Pencil hardness: H ISO 15184:1998

Sticking power: 1 GB/T 9286

Shock-resistant: 45cm.kg ISO6272-2:2002

Damage resistant (100g): do not scratch GB/T 9279-88.

Embodiment 3

Water nano resin 90%;

Defoamer 0.1%

Thickening material 0.1%%

Film coalescence aid 1%%

Wetting agent 0.1%

Aqueous nano scratch resistant agent 3%

Water nano wax emulsion 3%

PH conditioning agent 0.1%

Water 2.6%

The preparation method is with embodiment 1.

First component: Bayhydur XP2655 20%.

Detected result is as follows:

Solid content: 38.4% GB/T 1725-79 (second method)

Outward appearance: oyster white semi-fluid GB 1727-79

First, second two portions mix method system film, maintenance and the test of back by requirement among the HG/T 3828-2006 " indoor water-borne wood coating ".

Performance Detection is as follows:

Pencil hardness: H ISO 15184:1998

Sticking power: 1 GB/T 9286

Shock-resistant: 50cm.kg ISO6272-2:2002

Damage resistant (100g): do not scratch GB/T 9279-88.

Claims (5)

1. double-component aqueous nano scratch resistant wood coating is characterized in that, comprises two components of first component and second, and second weight percentages of components component is:

Water nano resin 75%～90%;

Defoamer 0.1%～1.0%

Matting agent 0～3%

Thickening material 0.1%～1.0%

Film coalescence aid 1%～5%

Wetting agent 0.1%～0.5%

Aqueous nano scratch resistant agent 1%～5%

Water nano wax emulsion 1%～5%

PH conditioning agent 0.1%～0.3%

Water 1%～5%

Above-mentioned each percentages of ingredients sum is 100%;

But the first component is a water decentralized polyisocyanate curing agent, and weight consumption is 10%～20% of a second component gross weight.

2. double-component aqueous nano scratch resistant wood coating according to claim 1 is characterized in that, said water nano resin contains-and OH base water nano acrylate copolymer or contain-OH base aqueous nano polyurethane dispersion.

3. double-component aqueous nano scratch resistant wood coating according to claim 1, it is characterized in that, described defoamer is a polysiloxane-polyether copolymer, described matting agent is the nanometer titanium dioxide silicon-type, described thickening material is one or both in the association type polyurethane thickener, described film coalescence aid is pure ether solvent or alkoxide solvent, described wetting agent is a polysiloxane-polyether copolymer, described aqueous nano scratch resistant agent main component is a nano-aluminium oxide, described water nano wax emulsion is the oxidic polyethylene nanometer paraffin wax emulsion, and described pH value conditioning agent is a 2-amino-2-methyl-1-propanol.

4. according to each described double-component aqueous nano scratch resistant wood coating of claim 1～3, it is characterized in that first composition weight consumption is 10%～20% of a second component gross weight.

5. prepare the method for each described double-component aqueous nano scratch resistant wood coating of claim 1～4, it is characterized in that, comprise the steps:

(1) at first the water nano resin is added in the container, under agitation add defoamer, dispersed with stirring;

(2) secondly add matting agent and thickening material, and dispersed with stirring;

(3) add film coalescence aid, wetting agent, aqueous nano scratch resistant agent, water nano wax emulsion and pH regulator agent then, dispersed with stirring is adjusted viscosity to 70～90KU/25 ℃ with thickening material and water at last and is promptly obtained product.