深圳市新航旺科技有限公司
深圳市新航旺科技有限公司
深圳市新航旺科技有限公司
深圳市新航旺科技有限公司
深圳市新航旺科技有限公司
深圳市新航旺科技有限公司
水性鋁顏料的使用方式與傳統(tǒng)鋁漿大致相同。為了達到理想的分散效果并充分展現(xiàn)包括白度、金屬感、遮蓋力、著色力、鮮映度(DOI)及隨角異色性的的各種金屬顏料的特性，我們建議以1:1或1:2的比例把鋁顏料預(yù)先分散在適當?shù)娜軇?，即水、乙二醇丁醚、丙二醇甲醚或異丙醇當中?/p>
同時，建議把溶劑逐漸加到鋁顏料漿中，并不斷攪拌。添加溶劑之后，可以繼續(xù)攪拌該混合漿，以確保完全分散。此外，如果在使用前先把顏料/溶劑混合漿放置一段時間，可能可以獲得更理想的效果。需要注意的是，攪拌葉應(yīng)盡量靠近調(diào)漿桶的底部，以保證顏料漿完全分散。攪拌葉的直徑應(yīng)為調(diào)漿桶直徑的1/2到3/4。
推薦工序如下：
A.先把鋁顏料添加至調(diào)漿桶中，然后添加溶劑，要時添潤濕劑
B.完全攪拌后，檢查是否有未分散的顏料存在
C.徹底攪拌后，可添加配方中的其它成分
添加適當?shù)臐櫇駝┗蚍稚┛色@得更理想的分散效果。
鋁顏料可與多種陰離子、陽離子與非離子乳化劑相容。
When using our aluminium pigment pastes for aqueous systems the same general recommendations apply as for conventional aluminium pastes. To achieve the optimum pigment dispersion and develop the full potential charateristics of the metallic pigment,brightness, brilliance, coverage and tinting strength distinctiveness of image (DOl, flop (two tone)we recommend predispersing the aluminium pigment paste in suitable solvents,i.e.- water, butyl glycol, methoxypropanol, isopropanol in a proportion 1.1 or 1: 2
At the same time it is recommended to gradually add the solvent to the aluminium pigment paste whilst stirring constantly. Upon completion of the solvent addition, the slurry may be stirred more thoroughly to ensure complete dispersion. In addition, some benefits may be observed upon holding the pigment/solvent slurry for a period of time before any further processing is done. Please note the mixing blade should be close to the bottom of the mixing vessel in order to ensure complete dispersion of the pigment paste.The diameter of the mixing blade should be 1/2 to 3/4 the diameter of the mixing vessel.
Following is a recommended procedure:
-First add the aluminium pigment to the mixing vessel,then add solvent and if necessary-a wetting agent.
-After thorough mixing, check for any undispersed pigment
-After thorough mixing has been achieved, other formulation components may be added.
Addition of suitable wetting or dispersing agent can be beneficial.
Aluminium pigment pastes are compatible with a variety of anionic, cationic and nonionic emulsifiers.
無論是在溶劑型還是水性涂料體系中,都應(yīng)該避免使用過高的剪切力而導(dǎo)致過高的機械應(yīng)力。高剪切力可能導(dǎo)致片狀顏料的變形和碎裂。顏料的損壞會直接影響外觀特性、發(fā)氣穩(wěn)定性和最終產(chǎn)品的儲存穩(wěn)定性。
因此我們建議使用低剪切力的攪拌葉,并根據(jù)調(diào)漿桶的尺寸來調(diào)節(jié)攪拌葉的直徑(見前述)。建議的攪拌速度為500-800rpm。此外,影響鋁顏料涂料表現(xiàn)的因素還有pH值以及用于調(diào)整pH值的添加劑。它們都會影響產(chǎn)品的儲存期限和發(fā)氣穩(wěn)定性。
根據(jù)我們的經(jīng)驗,當涂料的pH值介于6-9時,下列顏料都有令人滿意的穩(wěn)定性。
然而,以上的限制仍取決于所使用的樹脂體系。因此無論是在生產(chǎn)還是開發(fā)過程中,測試和控制發(fā)氣都非常重要。
任何情況下,在與顏料預(yù)分散漿混合之前,樹脂體系都應(yīng)調(diào)節(jié)至正確的pH值。當選擇適合的添加劑,如氫氧化銨(氨水）、TEA、DMEA、AMP90、TMEA等調(diào)節(jié)pH值時,應(yīng)注意在發(fā)氣穩(wěn)定性上,氫氧化銨(氨水)或TEA會比DMEA或AMP90帶來大的不良影響。
In both solvent and waterborne coating systems, extensive mechanical stress due to high shear forces should be avoided. High shear may result in deforming and/or fracturing of the pigment particles. This damage will reduce the optical properties, gassing stability and overall shelf life of the product.
Low shear mixing blades are recommended, their diameters have to be adjusted to the size of the mixing vessel(see above) Suggested mixing speed for dissolver blades is 500-800 rpm. Other parameters determining the performance of the aluminium pigmented coating material are the pH-value and the additives for adjustment of the pH-value in the coating material that influence shelf life and gassing stability.
According to our own experience, coatings with a pH-range between 6-9 can be produced with sufficient stability .
However these limits are dependent on the binder system used and therefore testing and control of gassing is very important in both development and manufacture .
In all cases the binder system has to be adjusted to the correct pH-value before blending with the aluminium paste slurry. When choosing suitable additives for the adjustment of the pH-value such as Ammonium Hydroxide, TEA, DMEA, AMP 90, TMEA and others, it should be considered that products like Ammonia or TEA have a more disadvantageous influence on the gassing stability than e. g DMEA or AMP 9O.
