CN1442454A

CN1442454A - Formaldehyde removal additive of paint and its production method

Info

Publication number: CN1442454A
Application number: CN 03112907
Authority: CN
Inventors: 王盛良
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-03-03
Filing date: 2003-03-03
Publication date: 2003-09-17

Abstract

An additive for removing formaldehyde from paint and its preparing process are disclosed. It can be directly added to paint and is not effective on paint properties. After the wooden furniture is coated by the paint, the release of formaldehyde can be effectively inhibited.

Description

A kind of paint removes formaldehyde additive and production method thereof

The invention discloses a kind of paint and remove formaldehyde additive and production method thereof.

For a long time, along with the increase of wood-based plate volume of production and marketing, it is one of problem of failing to solve during finishing uses that incident formaldehyde pollutes always.Owing to used a large amount of artificial boards and various wood adhesive in the fitment process, therefore various deleterious irritating smells are unavoidable in the newly-decorated room.Along with the raising of people's environmental consciousness, the reinforcement of health perception, also more and more higher to the requirement of fitting up the back indoor environment.The new harm that studies show that formaldehyde does not far just stimulate nose and eyes, and its long-time low dosage contact harm is bigger, still is serious to old man and children and pregnant woman's harm.And a large amount of uses of wood-based plate, though saved the forest reserves, improved the utilization ratio of timber, the processing characteristics of product is good again, but the negative impact that brings is exactly the problem that formaldehyde discharges, even the problem that present environment-friendly and green wood-based plate also still exists formaldehyde to discharge, just burst size is low slightly.

The invention discloses a kind of paint and remove the formaldehyde additive, it can fundamentally solve the formaldehyde pollution problem of artificial board in furniture is made.The present invention achieves the goal in the following manner.

Paint be all fit up the last of the finishing of timber board especially together must be through operation.Therefore being chosen in the removing that this step carries out the formaldehyde pollution in the wood furniture can play a multiplier effect.When the free formaldehyde in the sheet material discharges outward, run into and remove the formaldehyde additive in the paint film, formaldehyde will be caught fully to absorb and be removed, and can not be discharged in the indoor environment that the people lives.Simultaneously, this surface in sheet material of paint forms the hydrophobic macromolecule membrane of one deck, stop moisture further in sheet material, to permeate, delayed sheet material wearing out in storing use from another point of view again, wood-based plate aging is exactly the aging of the urea-formaldehyde glue that uses when producing wood-based plate or phenolic glue etc. after all, and established polymer chain break constantly takes place in the aging meeting of glue, discharges formaldehyde.Therefore paint removes the formaldehyde additive and joins when using in the paint, the physicochemical property of influence paint neither, again can with painted synergy, remove the free formaldehyde in the various furniture.The present invention is described further below in conjunction with embodiments of the invention.

Embodiment one: get 25 parts in urea, 25 parts of thiocarbamides add 25 parts of ethanol, and 25 parts of ethyl acetate are fully ground and made its one-tenth paste shape, and promptly cost paint removes the formaldehyde additive.

Embodiment two: get 10 parts in urea, and 90 parts of melamines, 20 parts of 85% ethanol add 100 parts of 90% propanedioic acid glycol ether esters, grind and are heated to 50 ℃, and it all is dissolved into uniform solution and is paint except that the formaldehyde additive after 4 hours.

Embodiment three: get present embodiment one described paint and remove 50 parts of formaldehyde additives, directly add in 250 parts of deployed on request alkyd paints, directly being brushed to 15 piece sizes after mixing well is the surface and the end face of 15cm * 5cm * common commercially available glued board of 0.7cm, and this is a test group.Blank group (not painting the normal plywood of processing) is set simultaneously and does not add the control group that paint removes the formaldehyde additive (with the processing of painting of same paint, but do not add paint and remove the formaldehyde additive), three groups of samples are the onesize commercially available glued board of same quantity.Test group and control group all paint one coat, wait to paint the mensuration of carrying out free formaldehyde content after doing with the blank group, and the measuring method of free formaldehyde is undertaken by the 24h moisture eliminator method of stipulating among the GB GB/T17657-1999.The blank group of result burst size of methanal be 12.3mg/L (burst size of methanal of GB regulation E2 level offset plate for≤5mg/L), and test control group is 5.8mg/L, test group only is that (the E1 step burst size of methanal of China regulation is≤1.5mg/L to 0.3mg/L, and the F1 step burst size of methanal of Japan is≤0.5mg/L).

Embodiment four: get present embodiment two described paint and remove 1000 parts of formaldehyde additives, join 7500 parts by in the deployed polyester lacquer of paint allotment requirement, directly paint the chifforobe made from core-board and glued board etc. after mixing well, the wardrobe size is 2.5m * 4m * 0.8m, totally three, three sizes that are placed in are 12 square metres room.Method by embodiment three is handled test group, test control group and control group, treat paint do after with three rooms after airtight two hours, directly carry out the mensuration of the concentration of formaldehyde in the room air with direct-reading type air formaldehyde determination instrument, the blank group of result concentration of formaldehyde is 0.67ppm, control group is 0.39ppm, and test group only (is significantly less than the Environmental Protection Level 0.08mg/m of the formaldehyde in indoor air of GB regulation for 0.03ppm ³).Test control group painted again paint for one time, still carry out the mensuration of free formaldehyde in the air by last method, the result is 0.21ppm.

Claims

1. a paint removes the formaldehyde additive, it is characterized in that directly adding in the paint and uses.

2. paint as claimed in claim 1 removes the formaldehyde additive, its feature also be this additive by at room temperature can with the composition and the solvent composition of formaldehyde reaction.

3. remove the formaldehyde additive as claim 1 and 2 described paint, its feature also is to paint except that comprising urea, ammonium salt class, thiocarbamide, melamine, ethylene urea, dicyandiamide, biuret with the composition of formaldehyde reaction in the formaldehyde additive, and they can use separately or several being used.

4. remove the formaldehyde additive as claim 1 and 2 described paint, its feature also be to paint except that the solvent in the formaldehyde additive can be alcohols, ester class and organic acid, they can use separately or several being used.

5. paint as claimed in claim 1 removes the formaldehyde additive, its feature also be this additive at room temperature can with the composition of formaldehyde reaction, total amount was 8%-90% when it used separately or is used, be preferably between the 20%-60%, solvent uses separately or several amount that is used is 92%-10%, is preferably between the 80%-40%.

6. remove the formaldehyde additive as claim 1 and 5 described paint, its feature also is fully to grind to form paste or make it be dissolved into uniform state adding with the component of formaldehyde reaction at normal temperatures in the solvent of aequum.Can suitably heat in grinding or dissolved process, temperature is controlled at 20 ℃-100 ℃, is preferably in 45 ℃-65 ℃.