CN101352649A

CN101352649A - Technique for producing formaldehyde scavenger resin

Info

Publication number: CN101352649A
Application number: CNA2008100170312A
Authority: CN
Inventors: 宋良; 张永刚
Original assignee: ZHUCHENG LIANGFENG CHEMICAL CO Ltd
Current assignee: ZHUCHENG LIANGFENG CHEMICAL CO Ltd
Priority date: 2008-06-20
Filing date: 2008-06-20
Publication date: 2009-01-28

Abstract

The invention discloses a production process used for formaldehyde scavenger resin, which is characterized in that pure water is added into a reaction kettle which is provided with porcelain enamel or stainless steel; the temperature of pure water is increased by heating steam; the reaction kettle with the pure water is mixed at moderate speed at the temperature of 30DEG C; carbamide and ethyleneurea with a certain quantity are added into the reaction kettle, and the temperature is increased to 55 DEG C and subsequently kept till the carbamide and ethyleneurea are completely dissolved; the solution is colourless and transparent and added by melamine, and the temperature raises to 85 DEG C and kept for 20min; subsequently, the temperature is reduced below 45 DEG C and antiseptic is added and mixed till the antiseptic is completely dissolved; finally, surfactant and active enzyme preparation are added, mixed, dissolved, filtrated, dehydrated, crystallized, dried and crushed so as to gain the finished product. The formaldehyde releasing quantity of artificial plate is obviously reduced and physical and mechanic indexes of the artificial plates, especially for the waterproof and moisture-proof performance, can be obviously improved.

Description

A kind of production technology of formaldehyde scavenger resin

Technical field

The present invention relates to a kind of production technology and manufacture craft of eliminating the formaldehyde scavenger resin that formaldehyde discharges in the wood-based plate.

Background technology

1, formaldehyde harm, source:

In recent years, along with the raising of living standards of the people, people are also more and more higher to the requirement of living environment, home decoration modernization day by day, standardization, but the room air chemical substance pollution problem that causes owing to material and finishing is following.It is healthy that these murder by poisoning things have had a strong impact on the resident, and Chinese Central Television's life channel report is because of finishing pollution, and the death rate that causes the people is 500 times before 10 years, has caused the great attention of countries in the world and domestic relevant department.In numerous pollution sources, formaldehyde is big to measure, strong toxicity, absorption is strong, scope is wide, has classified No.1 pollutant as.

Formaldehyde is a kind of volatile organic matter with big toxicity.(chemical molecular formula HCHO, molecular weight: 30.03, be a kind of colourless, the gas of intense stimulus smell is arranged, soluble in water, alcohol ether.Formaldehyde is gaseous state at normal temperatures, occurs with aqueous solution form usually.Its aqueous solution of 40% is called formalin, and this solution boiling point is 19 ℃.So highly volatile when room temperature is along with the rising evaporation rate of temperature is accelerated.

Formaldehyde is the material than high toxicity, is defined as carcinogenic disease and takes place and teratogenesis shape material by the World Health Organization, and be the allergen of generally acknowledging, also be one of potential strong mutagen.Studies show that: formaldehyde has strong carcinogenic and short cancer effect.It is documented that formaldehyde mainly shows aspects such as allotriosmia, stimulation, allergy, abnormal pulmonary function, dysfunction of liver and immunologic dysfunction to health effects.Its concentration reaches 0.06-0.07mg/m in every cubic metres of air ³The time, slight asthma will take place in children.When formaldehyde in indoor air content is 0.1mg/m ³The time, peculiar smell and sense of discomfort are just arranged; Reach 0.5mg/m ³The time, can stimulate eyes, cause and shed tears; Reach 0.6mg/m ³, can cause throat discomfort or pain.When concentration is higher, the vomiting that can cause nausea, it is uncomfortable in chest to cough, asthma even pulmonary edema; Reach 30mg/m ³The time, meeting is the causing death immediately.Long-term contact low dosage formaldehyde can cause chronic respiratory disease, cause nasopharyngeal carcinoma, colon cancer, brain tumor, paramenia, nuclear gene mutation, in the dna single chain commissure and DNA and protein commissure and suppress dna damage reparation, pregnancy syndrome, cause neonatal chromosome disorder, leukaemia, cause the decline of teenager's memory and intelligence.In all contactees, children and pregnant woman's PARA FORMALDEHYDE PRILLS(91,95) are particularly responsive, and harm is also just bigger, be because due to the pollution of finishing and furniture, its release period reaches 3-15, meeting heat chance tide will evaporate from the material deep layer, serious environment pollution has become insoluble global problem.

Summary of the invention

Formaldehyde in the wood-based plate discharges and mainly contains three sources: the free formaldehyde in (1) Lauxite, (2) in the hot pressing, a part of unstable structure such as ehter bond, methylol group, methylene decompose in the urea aldehyde molecular structure, (3) wood-based plate is in stacking and use, owing to be subjected to the effect of environment temperature, humidity, moisture content etc., decomposition takes place and discharges formaldehyde in the three-dimensional-structure after the curing.So the free formaldehyde of only removing in the Lauxite is not enough, so our purpose of invention is: this Lauxite that adds formaldehyde scavenger resin has very significantly scavenging action to the release of formaldehyde in the wood-based plate.Formaldehyde scavenger resin not only can be used in Lauxite manufacturing enterprise; Can also be used in Wood-based Panel Production enterprise, directly make an addition to and produce E0, E1 level wood-based plate in the Lauxite not up to standard, not only can significantly reduce the burst size of methanal of wood-based plate, can also obviously improve the mechanics index of physics of wood-based plate, particularly water-fast, humidity resistance.

Production technology of the present invention is: add pure water in having enamel or stainless reactor, and open steam and heat up, middling speed stirs in the time of 30 ℃, add certain amount of urea and ethylene urea, be warming up to 55 ℃, insulation is to dissolving fully, solution is water white transparency, adding melamine continues to be warmed up to 85 ℃ of insulations 20 minutes, be cooled to the anticorrisive agent of adding below 45 ℃ and be stirred to dissolving fully, add surfactant and active enzyme preparation at last, stirring and dissolving, filter, dehydration, crystallization, oven dry is pulverized and is got product, described surfactant can be neopelex, lauryl sodium sulfate, triethanolamine, described anticorrisive agent can be benzoic acid, Sodium Benzoate, natrium nitrosum, Tea Polyphenols.

The biological clear aldehydase of this method is applied in Wood-based Panel Production enterprise, three wood wood industry Co., Ltds use in Shandong, the multi-layer sheet burst size of methanal of producing is reduced to 0.9mg/L by original 17.6mg/L, particieboard is reduced to 9.8mg/100g by original 37.6mg/100g and reaches Europe E1 level artificial board formaldehyde burst size standard fully, and the bonding strength of wood-based plate, MOR, water proofing property etc. all have raising in various degree, the almost stingless concha aldehyde of workshop odor dispersion is subjected to enterprise and admits with the consistent of plant operations workman.In view of this, this method formaldehyde scavenger resin large-scale popularization is applied on the Wood-based Panel Production, must obtain considerable economic and social benefit.

The specific embodiment

In having enamel or stainless reactor, add pure water, and open steam and heat up, middling speed stirs in the time of 30 ℃, add certain amount of urea and ethylene urea, be warming up to 55 ℃, insulation is to dissolving fully, solution is water white transparency, adding melamine continues to be warmed up to 85 ℃ of insulations 20 minutes, be cooled to the anticorrisive agent of adding below 45 ℃ and be stirred to dissolving fully, add surfactant and active enzyme preparation at last, stirring and dissolving, filter, dehydration, crystallization, oven dry is pulverized and is got product, described surfactant can be neopelex, lauryl sodium sulfate, triethanolamine, described anticorrisive agent can be benzoic acid, Sodium Benzoate, natrium nitrosum, Tea Polyphenols.

Claims

1, a kind of production technology of formaldehyde scavenger resin, it is characterized in that: in having enamel or stainless reactor, add pure water, and open steam and heat up, middling speed stirs in the time of 30 ℃, add certain amount of urea and ethylene urea, be warming up to 55 ℃, insulation is to dissolving fully, solution is water white transparency, adding melamine continues to be warmed up to 85 ℃ of insulations 20 minutes, be cooled to the anticorrisive agent of adding below 45 ℃ and be stirred to dissolving fully, add surfactant and active enzyme preparation at last, stirring and dissolving, filter, dehydration, crystallization, oven dry is pulverized and is got product, and described surfactant can be neopelex, lauryl sodium sulfate, triethanolamine, described anticorrisive agent can be benzoic acid, Sodium Benzoate, natrium nitrosum, Tea Polyphenols.