BYK流变助剂

viscosity (Pa·s) 粘度
10
particles oriented in the flow direction, no network formation under shear
颗粒按流动方向定向，在剪切力下没有网络结构
1
Settling 沉降 – leveling / sagging 流平/流挂
higher molecular weight chains at rest,
tangled, structure builds up via
10
assoziation with resin and pigments 高分子量链在静止时缠结，通过树脂和颜料间
的缔合形成结构
high molecular weight chains at high shear, entanglement, oriented in flow direction
150
BYK-420
1% active loading 活性成分
Acrylate thickener
1% active loading 活性成分
丙烯酸酯增稠剂
Synthetic clay
1% active loading 活性成分
合成陶土
100
Natural clay 天然陶土 2% active loading 活性成分 Fumed silica 气相二氧化硅 5% active loading 活性成分
ICI
cone/plate
Krebs-Stormer
锥板粘度计
0,1
0.001
0.01
0.1
1
10
100
shear rate 剪切速率D (1/s)
1000 10000
12.7.2
Viscosity Profile with Pseudoplastic Flow Control Additives 含假塑性流动控制助剂的粘度范围
too polar 极性太高
Isopropanol 异丙醇
Water 水
Xylol 二甲苯/ n-Butanol 正丁醇 = 80 / 20 Butyl acetate 醋酸丁酯/ Dowanol PM 丙二醇单甲醚= 75 / 25
12.7.2
BYK-420 Rheology Additive for Thixotropic Flow Control in Water Born Systems and Pigment Concentrates 水性体系和颜料浓缩浆用触变性流 动流变控制助剂
Grinding 研磨 Application 施工
1000
10000
12.7.2
Viscosity Profile with Thixopropic Flow Control Additives 含触变性流动控制助剂的粘度范围
100
additive particles build up 3D-network via hydrogen bondings
通过氢键，助剂颗粒建立起3维结构
Lower particle size based products 低颗粒大小产品e.g.: Urea chemistry 脲化学(BYK-410,411,420) Clay based products 膨润土产品(Bentonites) Fumed silica 气相二氧化硅(Aerosil)
非极性体系
Thixotropic flow 触变性流动:
•Structure recovery after shear depends on time and dosage 剪切后的结构恢复和时间及用量有关
• Pronounced shear-thinning effect 显著的剪切变稀效果
• Ideal product performance to adjust leveling- and sag resistance balance 调整流平和抗流挂平衡有理想的效果
Butylacetate 醋酸丁酯
Compatible 相容
Diacetone alcohol 二丙酮醇 Butanol 丁醇
Isobutanol 异丁醇 Butylglycol 乙二醇丁醚
PropylenglycolMonomethylether
丙二醇单甲醚
Suitable solvent mixtures 合适的溶剂混合物:!
Viscosity 粘度 Pa s
50
0
12.7.2
0,05 0,1
0,2
0,5
1
2
shear rate 剪切速率 D(1/s)
5
10
BYK-420: Compatibility Test 相容性测试
1. Addition of BYK-420 to the non-pigmented formulation 将 BYK-420 加到不含颜料的配方中
高分子量链在高剪切力下互相纠缠，按流动方向定向
viscosity (Pa·s) 粘度
1
Settling 沉降 – leveling / sagging 流平/流挂
Storage 贮存
0,1
0.001
0.01
Transportation 运输 Stirring 搅拌
0.1
1
10
100
shear rate 剪切率D (1/s)
BYK Product Overew: Sag Resistance, Anti-Settling and Viscosity Control
BYK液态流变控制助剂: 防流挂,防沉淀及粘度控制
• BYK-410 • BYK-411 • BYK-420 • BYK-425 • BYK-430 • BYK-431 •BYK-428 •BYK-415
搅拌加入
Leabharlann BaiduNetwork build up 建立网络 Result: Strong thixotropic flow behavior 结果：形成强烈的触变性流动
12.7.2
Active substance precipitates in form of micro crystals 活性物质以微小晶体析出
BYK-410 BYK-411 BYK-420
Urea groups 脲基团
Modifying groups 改性基团: High polarity 高极性
12.7.2
Medium polarity 中等极性
Low polarity 低极性
Mode of Action 作用机理
Incorporation under stirring
的抗流挂性 • Anti settling properties dependant on
the adjusted storage viscosity 防沉降性受贮存粘度调整的影响
12.7.2
BYK-410, BYK-411, BYK-420: Thixopropy Additives Based on Modified Urea 基于改性脲的触变助剂
Inhomogenoues incorporation: 不均匀添加
no thickening effect 无增稠效果 inhomogenoues, particles 不均匀，有颗粒
12.7.2
BYK-420: Effective Thickening of Pure Water 在纯水中的增稠效果
Shear thinning 剪切变稀 Low application viscosity
低施工粘度
Post correction 后粘度调整
Pseudoplastic flow - Main advantage:
假塑性流动 – 优点
Fast structure recovery
粘度结构恢复快
High build applications
12.7.2
Viscosity Profile Dependant on the Shear Rate 粘度与剪切速率有关
Viscosity 粘度
(Pa·s)
LOW SHEAR 低剪切
MEDIUM SHEAR 中等剪切
HIGH SHEAR 高剪切
100
Storage 贮存
Transportation 运输
• Air release properties 脱泡性能
Pseudoplastic flow 假塑性流动:
• Imediate structure recovery after shear 剪切后结构立即恢复
• Excellent sag resistance even for high build systems 即使用于厚膜体系也有优异
(homogeneous mixing 均相混合)
2. Compatibility test 相容性测试 visual judgement of compatibility 目测评价
(particles / seeds) and rheological effect （颗粒/析出）以及流变效果
Particles / seeds visible 可见颗粒/析出
Liquid rheology control additives for Paint Industry 涂料用液态流变控制助剂
Presented by Alec Li, 李玉桂 Product Group Manager- Rheology 流变助剂产品经理 BYK Solutions ( Shanghai) Co.,Ltd
12.7.2
BYK-420: Rheology Control in Aqueous Systems 在水性体系中的流变控制
Homogenous, rapid incorporation: 均匀快速添加
excellent thickening effect 优异的增稠效果 homogenoues, no particles 均相无颗粒
Structure formation via hydrogen bondings 通过氢键形成结构
BYK-410: Efficiency Depends on Polarity of System BYK-410: 效力与体系极性有关
too non-polar 极性太低
White spirits 石油溶剂 Xylene 二甲苯
厚涂施工
Sag resistance 防流挂 Improvement of “in-can viscosity“
增加罐内粘度
12.7.2
Liquid Rheology Additives: Differentiation 液态流变助剂的区别
Polar systems 极性体系
BYK-411 BYK-410 BYK-420 Non-polar systems BYK-431 BYK-430 BYK-425
100
Higher molecular weight based products 高分子量产品e.g.: Polyamides 聚酰胺(e.g. BYK-430 / 431) Castor oil derivatives 蓖麻油衍生物 Polyurethane 聚氨酯(e.g. BYK-425) Alkaline swellable emulsions 碱溶胀性乳液 Cellulosic 纤维素
Storage 贮存
0,1
0.001
0.01
Transportation 运输
0.1
1
Stirring 搅拌
10
100
shear rate 剪切率D (1/s)
Grinding 研磨 Application 施工
1000
10000
12.7.2
Product Differentiation According to Polarity and Flow Properties系列产品应用 于不同极性体系,产生不同的流变效果
Production 生产
10
Leveling 流平
can viscosity under stirring 搅拌
Settling 沉降 Sagging 流挂 下的罐内粘度
Application 施工
Rotational viscometer 旋转粘度计
Brookfield
1
Flow cup 4 mm 4mm流动杯
Non polar systems非极性体系
BYK-411
BYK-431
BYK-410 BYK-430
Polar systems极性体系
BYK-420 BYK-425
Thixotropic flow- Main advantage:
触变性流动 – 优点
Anti-settling 防沉淀
Leveling 流平