POLACRIL AT990

Associative Thickener 締合型增稠劑

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 免費信息parable 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陰離子增稠劑，為假塑性的室內/外墻乳膠漆所設計。提供旨在提供高罐內剪切粘度，達到理想的流掛和流平性能之間的平衡。表現的粘度優于分子量較高的HEC表現出的低剪切力的增稠劑。它比纖維素增稠劑表現出更好的抗輥涂飛濺性能。有一個很理想的假塑性的流變曲線，在涂料中以減少沉降的傾向。非常容易與涂料相配。中和后適用于PH值在7.5到9.5的環境。

Characteristics特性

Delivers high in-can structure傳送高罐內構建

Excellent sag resistance 卓越的抗流掛性

Imparts non settling properties 賦予非沉降性能

Ideal for viscosity adjustments as a post addition加入后非常適于粘度調整

 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. 粘度通過中和至pH為7.5 /9.5

Typical Properties 典型值

These properties are typical values but do not constitute specifications.

Formulations Addition 配方參考

· 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，因此非常適合于批量處理和/或用于自動計量設備。

· 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 re免費信息mended to add diluted 1:1 with water.

 可以用于配制的不同階段，只要使體系為堿性環境下。這些階段是：用于連接料成分，分散。在所有情況下，建議添加前AT990與水1:1稀釋。

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 作為連接料的最終成分，根據設定的粘度測試增稠劑的添加量。

· 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.

在任何情況下，事先向AT990加入堿的適當量是為了避免低pH值和隨后的顏料絮凝必不可少的

Rheological Behavior 流變性

Viscosity development of POLACRIL AT990 粘度改善

1) POLACRIL AT990 / Styrene acrylic latex ， After 2 hours aging at 77°F.

AT990/苯丙乳膠 ， 25°C ， 2小時后 ；

 配比如下：

POLACRIL AT990  -------------------------------------2.0%

Styrene acrylic latex苯丙乳膠 ------------------------46,6%

D.I. Water 水-----------------------------------------------51,2%

Ammonia (28%) 氨水-------------------------------------------------0,2%

AT990 Dry solids 0.6%（AT990固體份0.6%）

pH: 8 – 8.5

2) POLACRIL AT990 / Water,,After 2 hours aging at 77°F.

    AT990/ 水  25°C ， 2小時后

   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固體份1.0%）

pH: 8 – 8.5