游离甲醛

探讨了用多元醇醚化2D树脂合成超低甲醛醚化树脂的工艺条件和影响树脂游离甲醛量的因素。

Researchers studied the process conditions for synthesizing superlow formaldehyde etherified resin by etherifying 2D resin with polylol and the factors influencing free formaldehyde from resin .

环境温度为25℃，pH值为8-9时，产物稳定性好、贮存期长、游离甲醛含量低。

The product could be stored for long time with good stability and had low free formaldehyde under the conditions of 25 ℃ ambient temperature and pH value of 8 ~ 9 .

整理后织物抗静电效果依旧很好，不会产生静电，不含游离甲醛且水萃取液pH经处理后也能达标。

The antistatic effect of the finished fabric was still very good , did not produce static electricity . Did not contain free formaldehyde and water extract pH after treatment met the requirement .

Fe~（2+）/H2O2催化氧化脲醛树脂胶中游离甲醛及其对性能的影响

Removing Free Formaldehyde From Urea-Formaldehyde Resin Adhesive By Means of Fe ~ ( 2 + ) / H_2O_2 Catalytic Oxidation and Its Effects on Performance of the Adhesive

针对UF树脂胶合成和应用中易出现的两个问题，采用在制备过程中添加自制复合改性剂和稳定剂的办法，明显提高了UF树脂胶的稳定性和降低了游离甲醛的含量。

In this paper two problems in the synthesis and applications of Urea-Formaldehyde resin . Application method of adding the composite modifier and stabilizer in the preparation .

在实验室条件下，用低毒改性UF胶压制中密度纤维板，用穿孔碘量法测得成板的游离甲醛释放量为4.19mg／100g，达到了德国E1级。

By MDF manufacturing experiments on a laboratory scale with low toxic modified UF resin adhesive , formaldehyde emission is 4.19mg/100g tested by perforator method reaching ? grade of German norm .

耐水性差、游离甲醛释放量高是我国中密度纤维板（MDF）存在的两个主要问题。

Poor water resistance and high formaldehyde emission ( FE ) are two main problems of the medium density fiberboard ( MDF ) produced in our country .

合成出了在达到浸渍树脂贮存期、游离甲醛含量、适用期等要求下，满足预油漆纸的耐潮湿性的MUF浸渍树脂。

Composed MUF meets storing life , content of free formaldehyde , pot life and the moisture-resistance performance of the finish foil .

该UF树脂制备经过4个pH值（1.5,9.0,4.5,8.0）阶段，最后阶段加入尿素的量对UF树脂游离甲醛的含量有着重要的影响。

UF resins were produced through four stages of different reaction pH values ( 1.5,9.0,4.5,8.0 ) . Free formaldehyde contents of UF resins were affected most significantly by the amount of the added urea in the last stage .

目的以PAM代替水性内墙涂料中的PVF，消除PVF中游离甲醛对环境所造成的污染。

Aim With PAM as the substitute of the PAF in the aqueous inner coating , the environmental pollution due to free formol in the PVF can be eliminated .

含P800的阻燃脲醛树脂能降低游离甲醛量，提高阻燃性能。

The fire-retardant urea-formaldehyde resins with P800 decreased the formaldehyde and improved the fire-retardant property .

在尿素与甲醛加成-缩合反应中，分2次加入自制PQ复合添加剂，可明显降低游离甲醛的含量，提高脲醛树脂胶粘剂（UF胶）的稳定性。

Adding the PQ additive with 2 times , to the addition condensation reaction of urea with formaldehyde , can reduce the content of free CH 2O and increase stability of UF resin adhesive .

介质PH值为65～70，反应时间45min，同时反应体系中加入20%尿素和10%硼砂混合物时，游离甲醛含量可降至10%以下。

Reaction time , 45 min and the content of free-formaldehyde reduced below 1.0 % when the mixes of urea 2.0 % and borax were added info reaction system . in the meantime .

研究结果表明，测试时控制样品溶液温度低于5℃，滴定时间为15s，固定亚硫酸钠用量，所测得的游离甲醛量的误差很小。

Results show that deviation level is very low under the conditions of sample temperature lower than 5 ℃, titration for 15 s at the fixed concentration of sodium sulfite .

用TR-2甲醛捕捉剂处理脲醛树脂可明显降低其游离甲醛含量。

Scanvanger TR-2 can be added to urea-formadehyde resin adhesive to markedly decrease its free formadehyde content .

对脲醛树脂中主要的官能团：游离甲醛、亚甲基、亚甲基醚、Uron等相互关系也进行了研究。

The relationship between main groups in the UF resin , such as free formaldehyde , urea and its derivatives , methylene , methylene ether were investigated .

当初始游离甲醛含量在2.00%-6.00%时，YZ-1的施加量为4.0%，可使游离甲醛含量降至0.22%。

Adding 4.0 % YZ - 1 could make the content of free formaldehyde reduce to 0.22 % when the initial content of free formaldehyde in the resin was 2.00 % - 6.00 % .

据此制定生产工艺，并合成KJN型呋喃树脂，其产品具有低氮、低粘度、低游离甲醛、高强度等特点。

The product of this resin has many characteristics such as low nitrogen level , low viscosity , low concentration of free formaldehyde and high strength .

研究了Uron树脂及其使用方法对降低脲醛树脂胶粘剂游离甲醛含量及胶接胶合板甲醛释放量的作用与效果。

The effects of different formaldehyde / urea molar ratio Uron resins and different using methods on reducing free formaldehyde content of UF resins and formaldehyde emission value of its bonded plywood were studied .

衍生-气相色谱法测定水产品中的游离甲醛

Determination of free-formaldehyde in aquatic products by derivatization and gas chromatography

热压工艺对刨花板游离甲醛含量的影响

The Effect of Pressing Conditions on the Free-Formaldehyde Content of Particleboard

乙酰丙酮比色法测定树脂类皮革化学品中游离甲醛的含量

Acetyl Acetone Colorimetry Used to Determine Free Formaldehyde in Leather Chemicals

银杏木炭降低脲醛树脂游离甲醛的研究

The ginkgo-activated carbo absorbed the free formaldehyde in the UF resins

浅议低游离甲醛人造板中游离甲醛的测定

Determination of Free Formaldehyde of Wood-based Panels with Low Formaldehyde Emission

细木工板游离甲醛不同检测方法的比较分析

Comparison and Analysis on Different Determination Methods for Formaldehyde Emission from Blockboard

介绍了国内外游离甲醛消除剂的研究进展。

The research development of free-formaldehyde scavengers over the world was introduced .

甲醛清除触媒在清除人造板中游离甲醛的试验研究

Experimental Study on Formaldehyde Clearance Membrane Removing Free Formaldehyde in Wood-based Panels

铸造用糠醇改性脲醛树脂中游离甲醛的研究

Research of Free Formaldehyde in Furfural Alcohol Modified UF Resins for Foundry

游离甲醛含量低的脲醛树脂生产法

Manufacture of Urea-Formaldehyde Resin with Low Content of Free Formaldehyde

降低刨花板中游离甲醛含量的几种方法

The methods to reduce the content of free formaldehyde in particle board