POLACRIL AT990
Associative Thickener 缔合型增稠剂
Description描述
POLACRIL AT990 is a hydrophobically modified anionic thickener(HASE) designed to give a very pseudoplastic profile in interior / exterior latex paints.
POLACRIL AT990 provides paints with high in-can structure and is ideal for use with some other thickeners designed to give high shear viscosity to achieve the desired balance between sag and levelling properties. POLACRIL AT990 exhibits viscosity build comparable to high molecular HEC thickeners at low shear levels. It demonstrates better roller spatter resistance than the cellulosics. POLACRIL AT990 has a very pseudoplastic rheological profile ideal to reduce settling tendencies in the paint.
POLACRIL AT990 is very easy to handle and incorporate into the paints.
POLACRIL AT990 develops viscosity by neutralization to a pH of 7.5 / 9.5
POLACRIL AT990是一款疏水改性的HASE阴离子增稠剂，为假塑性的室内/外墙乳胶漆所设计。提供旨在提供高罐内剪切粘度，达到理想的流挂和流平性能之间的平衡。表现的粘度优于分子量较高的HEC表现出的低剪切力的增稠剂。它比纤维素增稠剂表现出更好的抗辊涂飞溅性能。有一个很理想的假塑性的流变曲线，在涂料中以减少沉降的倾向。非常容易与涂料相配。中和后适用于PH值在7.5到9.5的环境。
Characteristics特性
Delivers high in-can structure传送高罐内构建
Excellent sag resistance 卓越的抗流挂性
Imparts non settling properties 赋予非沉降性能
Ideal for viscosity adjustments as a post addition加入后非常适于粘度调整
Easy to handle and incorporate into the coating formulations.易操作，非常容易加入到涂料配方
Resistant to microbe and enzyme attack.抗微生物和酶的侵害
Develops viscosity by neutralization to a pH of 7.5 / 9.5. 粘度通过中和至pH为7.5 /9.5
Typical Properties 典型值
These properties are typical values but do not constitute specifications.
|
Appearance |
White emulsion 白色乳液 |
|
Solids % 固含量 |
30 |
|
pH (as is) |
3 |
|
Viscosity at 25ºC (cP) |
< 100粘度 |
|
Ionic Nature离子性 |
Anionic 阴离子 |
Formulations Addition 配方参考
· POLACRIL AT990 is a low viscosity emulsion easy to pump or pour and therefore suitable
for bulk handling and/or automatic metering equipment.
AT990 是低粘度的乳液，容易泵送或倒入，因此非常适合于批量处理和/或用于自动计量设备。
· POLACRIL AT990 can be incorporated at different stages of formulation, enough base
should be provided to neutralize the thickener and additional base is used to adjust pH.
These stages are: the final letdown ingredient, after dispersion but prior to letdown or prior
to pigment dispersion. In all cases it is recommended to add diluted 1:1 with water.
可以用于配制的不同阶段，只要使体系为碱性环境下。这些阶段是：用于连接料成分，分散。在所有情况下，建议添加前AT990与水1:1稀释。
Tips配方提示
· Add POLACRIL AT990 as one of the final ingredients in the letdown, it is convenient to test
the approximate amount of thickener that should be added to achieve the targeted viscosity.
AT990 作为连接料的最终成分，根据设定的粘度测试增稠剂的添加量。
· In any case, the addition of the appropriate amount of base prior to the POLACRIL AT990
is essential in order to avoid low pH and subsequent pigment flocculation.
在任何情况下，事先向AT990加入碱的适当量是为了避免低pH值和随后的颜料絮凝必不可少的
Rheological Behavior 流变性
Viscosity development of POLACRIL AT990 粘度改善
1) POLACRIL AT990 / Styrene acrylic latex ， After 2 hours aging at 77°F.
AT990/苯丙乳胶 ， 25°C ， 2小时后 ；
配比如下：
POLACRIL AT990 -------------------------------------2.0%
Styrene acrylic latex苯丙乳胶 ------------------------46,6%
D.I. Water 水-----------------------------------------------51,2%
Ammonia (28%) 氨水-------------------------------------------------0,2%
AT990 Dry solids 0.6%（AT990固体份0.6%）
pH: 8 – 8.5
2) POLACRIL AT990 / Water,,After 2 hours aging at 77°F.
AT990/ 水 25°C ， 2小时后
配比如下：
POLACRIL AT990------------------------------------ 3.3%
D.I. Water 水---------------------------------------------96,2%
Ammonia (28%)氨水----------------------------------------------- 0,5%
AT990 Dry solids 1.0%（AT990固体份1.0%）
pH: 8 – 8.5