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15．Viscosities of Various Polyols at 80℃
16．Polyurethane Reactivity 聚亚安酯反应
? All reaction components stay in the product 所有的反应成分留在产品中 ? This includes catalysts 这里包括各种催化剂
? As the reaction conditions are mild catalyst levels are normally very low 因为反应条件非常温和，剩余催化剂含量非常低
? These residual catalysts can be used to control the reactivity of the polyol in the reaction with isocyanates
剩余的催化剂可以控制与异氰酸酯的反应
17．Ring Opening Polymerisation of Caprolactone 己酯开环聚合
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18．Examples of Commercial Products
19．Acid Value 酸值
? The residual acid value in CAPA? polyols is always very low - in most cases less than 0.1 mg KOH/g
CAPA的酸值一般都是非常低的，甚至低于0.1 mg KOH/g
? Special grades are made with acid values of less than 0.05 mg KOH/g - effectively zero 特殊型号的酸值可以达到低于0.05 mg KOH/g甚至为零 ? Acid value has a big influence on hydrolysis resistance 酸值会对耐水解性有很大影响
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20．Change in Stress at Break 压缩变定值 变形（%）
21．Change in Stress at Break 压缩变定值 变形（%）
22．Change in Stress at Break
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压缩变定值 变形（%）
23．Copolymers 共聚物
? Both block and random copolymers are possible 结晶与无定型结构的共聚物都是存在的 ? Block copolymers are most common 结晶的共聚物更为普遍
PTMEG - CAPA? 7201 A Polycarbonate polyol – – Polyethers – – Polyesters
– – Poly bd ……….
24．CAPA Polyol Properties CAPA多元醇的特性 Compared to other Polyesters 与其他聚酯的比较
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Hydrolysis resistance 耐水解性 Tear strength 撕裂强度 Cold flex 低温柔软性 Flex fatigue 弯曲疲劳性 Low density Pus 低密度
Low viscosity polyol 低黏度多元醇 Consistent reactivity 反应可控，易加工
Narrow molecular weight distribution 分子量分布窄 Low acid value 低酸值
Primary hydroxyl groups 伯羟基基团
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25．CAPA Polyol Properties CAPA多元醇的特性
Compared to Polyethers 与聚醚的比较 ? Chemical resistance 耐化学性 ? UV stability 紫外光稳定性 ? Solvent/oil resistance 耐溶剂(油)性
? Cut and tear strength 剪切和撕裂强度好 ? Abrasion resistance 抗磨损性
? All primary hydroxyl groups 全部是伯羟基
? Narrow molecular weight distribution 分子量分布窄 ? Controlled functionality 可控的官能团
26．New Developments 新的发展
? Solvay are constantly looking for new opportunities to expand the product range Solvay公司仍在不断开拓和寻找此类产品的新应用领域
? As CAPA? chemistry is so versatile products can be tailored to make specific functionality, molecular weight and reactivity combinations
此类产品依其特殊的性能，分子量和其优越的性能已经成为通用的产品
27．Polyurethane Dispersions (PUD’S) 聚亚安酯的色散曲面
?? Issues 论点
– VOC reduction VOC缩减量 – – Solventless systems 固化系统 – – Water borne systems 水负荷系统 – ? Components 成分
– – Isocyanate - Hard Segment 异氰酸盐 硬段
– – Chain extender - DMPA - Hard Segment 链混合剂—DMPA—硬段 – – Polyol - CAPA? - Soft Segment CAPA—软段
28．New Initiators 新的引发剂
2,2 dimethylol propionic acid (DMPA) 二羟甲基丙酸
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CAPA聚己内酯在特殊聚氨酯中的应用
