流变助剂CHINAStandardPresentationJuly20090723

Rheology Additives
For Water Based and Solvent Based Systems
Presented by 主讲人 Axel Woocker Product Group Manager Rheology 流变助剂经理 July 2009

Rheology Additive Characterisation
7/21/2009, Page 2, Rheology July 2009

BYK-410, BYK-411, BYK-420 Liquid thixotrope family – Viscosity profile 液体触变-粘度曲线一览图
100
η 粘度
viscosity (Pa·s) η (Pa·s)
Storage 贮存 Transportation 运输 Stirring 搅拌 Production 生产 Application 施工
10
Leveling 流平 Settling 沉降
Sagging 流挂 Rotational viscometer 旋转粘度计
1
Brookfield
Flow cup 4 mm 涂4杯 Krebs / Stormer ICI cone/plate 椎板粘度计
10000
0,1 0.001 0.01 0.1 1 10 100 1000
shear rate 剪切速率 D (1/s) LOW SHEAR
7/21/2009, Page 3, Rheology July 2009
MEDIUM SHEAR
HIGH SHEAR

Definition of Terms - Newtonion Flow Behavior Viscosity Curve 术语的定义 – 牛顿型流动:粘度曲线
Viscosity 粘度η
viscosity curve 粘度曲线 newtonian flow: η = const.牛顿型流动: η =常数.
shear rate 剪切速率 D
7/21/2009, Page 4, Rheology July 2009

Viscosity Profile with Pseudoplastic Flow Control Additives 含假塑性流动控制助剂的粘度范围
Higher molecular weight based products 高分子量产品e.g.: 高分子量产品 Polyamides 聚酰胺 聚酰胺(e.g. BYK-430 / 431) Castor oil derivatives 蓖麻油衍生物 Polyurethane 聚氨酯 聚氨酯(e.g. BYK-425) Alkaline swellable emulsions 碱溶胀性乳液 Cellulosic 纤维素
100
viscosity η (Pa·s) 粘度
10
higher molecular weight chains at rest, tangled, structure builds up via 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, untanglement, oriented in flow direction 高分子量链在高剪切力下互相纠缠，按流动方向定向
1
Settling 沉降 – leveling / sagging 流平/流挂 流平 流挂 Storage 贮存 Transportation 运输 Stirring 搅拌 Grinding 研磨 Application 施工
0,1 0.001 0.01 0.1 1 10 100 1000 10000
shear rate 剪切率 (1/s) 剪切率D
7/21/2009, Page 5, Rheology July 2009

Thixotropic Flow Behavior - Time Dependency 触变性流动 – 与时间有关
Viscosity 粘度η
sol curve 溶解曲线
gel curve 胶凝曲线
shear rate 剪切速率D
7/21/2009, Page 6, Rheology July 2009

Viscosity Profile with Thixopropic Flow Control Additives 含触变性流动控制助剂的粘度范围
additive particles build up 3D-network via hydrogen bondings 通过氢键，助剂颗粒建立起3维结构 通过氢键，助剂颗粒建立起 维结构 Lower particle size based products 低颗粒大小产品e.g.: 低颗粒大小产品 Urea chemistry 脲化学 脲化学(BYK-410,411,420) Clay based products 膨润土产品 膨润土产品(Bentonites) Fumed silica 气相二氧化硅 气相二氧化硅(Aerosil)
100
viscosity η (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 流平 流挂 Grinding 研磨 Stirring 搅拌 Application 施工
0,1
Storage 贮存
Transportation 运输
0.001
0.01
0.1
1
10
100
1000
10000
shear rate 剪切率 (1/s) 剪切率D
7/21/2009, Page 7, Rheology July 2009