铝酸酯偶联剂DL-411

铝酸酯偶联剂DL-411

一、产品适用范围：
适用于各种无机填料(如碳酸钙、硅灰石粉、滑石粉、硫酸钡、叶腊石粉、高岭土、粉煤灰、海泡石、氧化铝等),无机阻燃剂(如氢氧化镁、氢氧化铝、硼酸锌、三氧化锑等)和颜料(如氧化铁红、锌钡白、钛白、氧化锌、立德粉等)的表面活化改性。经改性后的填料、色母粒、阻燃剂、颜料，可适用于塑料、橡胶、涂料、油墨、层压制品和粘结剂等复合制品。

二、特点与使用效果
 1、与其它偶联剂（如钛酸酯、硼酸酯等）相比，经铝酸酯偶联剂活化改性处理后的无机粉体，除质量稳定外，还具有色浅、无毒、味小及对PVC的协同热稳定性和润滑性，适用范围广，无须稀释剂，使用方便，价格低廉。
 2、经铝酸酯偶联剂活化改性处理的各种无机粉体，因其表面发生化学或物理化学作用生成一有机分子层，由亲水性变成亲有机性。实践证明，无机粉体表面经铝酸酯偶联剂改性后用于复合制品中，偶联剂的亲无机端与亲有机端能分别与无机填料表面和有机树脂发生化学反应或形成缠结结构，增强了无机粉体与有机树脂的界面相容性，所以用铝酸酯偶联剂改性，不仅可以改善填充无机粉体的塑料制品的加工性能，而且也可以明显改善制品的物理机械性能，使产品吸水率降低，吸油量减少，填料分散匀均。
 3、在生产颜料、油墨、涂料的研磨颜(填)料工序中，可直接投入计量的偶联剂，起到改善颜(填)料的分散性，缩短研磨时间，提高细度、亮度并降低粘度增加材料的附着力的明显效果。

4、改性CaCO3应用PVC型材\管材可大幅增加填充量,同时还保留材料优异的力学性能,如拉伸强度，断裂伸长率，冲击强度,同时该型号偶联剂的改性生产的PVC管\型材表面光洁度高,无麻点,表面光滑,说明铝酸酯偶联剂是一类优异的偶联剂能起到增强增填作用。同时具有良好的水解稳定性。

5、是防霉变性塑料制品的偶联剂。

6、偶联剂生产的填充母料、色母料、透明母料、吸水母料、降解母料.阻燃母料；其增加量均比普通偶联剂生产的制品的增加量明显大幅度提高,且各项力学性能稳定；断裂制品伸长率。

7、由于本型号偶联剂活化改性的无机粉体固而应用于干粉涂料、油墨、塑胶制品的粘结力，附着度更强，不易析出褪色等优异特点。

三、产品用量

    注：①无机粉体表面粒径600-800目偶联剂用量为0。7%/无机粉体表面粒径800目偶联剂用量

为0。8%/无机粉体表面粒径1250目偶联剂用量为填料量的1.0％。其他工艺成型的制品或发泡软制品，用填料量的0.5～1.0％。
        ②对于炭黑、氢氧化铝、氢氧化镁、水镁石粉等具有高比表面或高活性表面的填料，偶联剂用量应适当增加到1.5～2.5％。为了更好发挥偶联剂效果并降低改性成本，建议参照第六条（4）点加入协同剂(硬脂酸)。

 四、主要质量指标：

 五、填料活化改性处理方法：

 1、预处理法：填料先在高速混合机(预热到物料温度达100－110℃)中搅拌烘干(敞口)10～15分钟，使填料含水量低于0.3％，缓缓加入计量的掐碎的偶联剂（注意勿使偶联剂被搅拌桨打到混合机内壁），改性时间3～5分钟。

 2、直接加入法：若填料含水量低于0.3％，可直接在高速机中捏合时加入偶联剂，加入方法同上。但应注意硬脂酸、有机醇之类含羧基、羧基的组份，务必在加入偶联剂对填料进行活化改性4分钟后加入，千万勿与偶联剂先或同时加入，以免偶联剂失效。
以上二法，以前法处理的效果好。

六、成功应用偶联剂的关键：

1、保证偶联剂对填料活化改性效果一定要用夹套加热的高速混合机进行填料的活化改性。
2、用于PE、PP、ABS、PS等粒状树脂为原料的复合制品时，先制成母料或粒料形式，再与这些粒状树脂混合应用。该型号偶联剂生产的填充母料，应用与复合体系，其断裂伸长率，填充量，表面光泽度，材料韧性等物化性能完全优于其他各种偶联剂。
3、要保证本偶联剂改性的填料与粉状树脂(如PVC)及其配合料有良好的塑化效果，建议采用高速捏合之后经密炼或塑炼后再挤出切粒。
4、用于无机粉体改性时，建议加少量硬脂酸作为协同剂，可在保证质量前提下降低成本。硬脂酸用量一般为粉体的0.50％。用法是在高速混合机中投入偶联剂对填料进行活化改性3～5分钟后，加入少量硬脂酸，再高速搅拌3分钟即可。千万注意勿与偶联剂先加入或同时加入，即可与偶联剂起良好的协同效应。如生产PVC管材在偶联剂改性3～5分钟后加入硬酯酸，在大量增加活化好的碳酸钙可保持PVC管材良好的韧性、抗冲性、并能明显提高制品光泽度。

 七、储存方式：

使用过程中产品应存于干燥通风处、避光、隔热

 Aluminate coupling agent

1. Product Scope:

Suitable for various inorganic fillers (such as calcium carbonate, wollastonite powder, talc powder, barium sulfate, pyrophyllite powder, kaolin, fly ash, sepiolite, alumina, etc.), inorganic flame retardants (such as magnesium hydroxide, Surface activation modification of aluminum hydroxide, zinc borate, antimony trioxide, etc.) and pigments (such as iron oxide red, zinc barium white, titanium white, zinc oxide, lithopone, etc.). The modified filler, masterbatch, flame retardant, and pigment can be applied to composite products such as plastics, rubber, paints, inks, laminates, and adhesives.

2. Features and effects

 1. Compared with other coupling agents (such as titanate, borate, etc.), the inorganic powder activated and modified by the aluminate coupling agent, in addition to stable quality, also has light color and non-toxic , Small taste and synergistic thermal stability and lubricity to PVC, a wide range of application, without thinner, easy to use and low price.

 2. Various inorganic powders that are activated and modified by aluminate coupling agent generate an organic molecular layer due to chemical or physicochemical effects on the surface, which changes from hydrophilic to organic. Practice has proved that the surface of inorganic powder is modified by aluminate coupling agent and used in composite products. The inorganic and organic ends of the coupling agent can chemically react or form entanglement with the surface of inorganic filler and organic resin, respectively Structure, enhances the interface compatibility of inorganic powder and organic resin, so modified with aluminate coupling agent can not only improve the processing performance of plastic products filled with inorganic powder, but also significantly improve the physical machinery of the product The performance reduces the water absorption rate of the product, reduces the oil absorption, and evenly disperses the filler.

 3. In the process of grinding pigments (filling) for the production of pigments, inks, and coatings, the metered coupling agent can be directly input to improve the dispersion of the pigments (filling), shorten the grinding time, and improve the fineness and brightness. The obvious effect of reducing the viscosity and increasing the adhesion of the material.

4. Modified CaCO3 application of PVC profiles \ pipes can greatly increase the filling amount, while still retaining the excellent mechanical properties of the material, such as tensile strength, elongation at break, impact strength, and the production of PVC modified by this type of coupling agent The surface of the tube \ profile has high smoothness, no pitting, and smooth surface, which indicates that the aluminate coupling agent is a kind of excellent coupling agent that can enhance the filling effect. At the same time, it has good hydrolytic stability.

5. It is a coupling agent for anti-mildew plastic products.

6. Filling masterbatch, color masterbatch, transparent masterbatch, water-absorbing masterbatch, degradable masterbatch produced by coupling agent. Flame retardant masterbatch; the increase is significantly larger than that of products produced by ordinary coupling agent Increased and stable mechanical properties; elongation of broken products.

7. Because the inorganic powder solid modified by this type of coupling agent is activated and applied to dry powder coatings, inks, and plastic products, the adhesion is stronger, the adhesion is stronger, and it is not easy to precipitate out fading and other excellent features.

3. Product dosage

    Note: ① The dosage of the coupling agent with an inorganic powder surface particle size of 600-800 mesh is 0.7% / the dosage of the coupling agent with an inorganic powder surface particle size of 800 mesh

It is 0.8% / the inorganic powder surface particle size 1250 mesh coupling agent dosage is 1.0% of the filler. For products formed by other processes or foamed soft products, 0.5 to 1.0% of the amount of filler is used.

        ② For carbon black, aluminum hydroxide, magnesium hydroxide, brucite powder and other fillers with high specific surface or high active surface, the amount of coupling agent should be appropriately increased to 1.5 to 2.5%. In order to better exert the effect of the coupling agent and reduce the modification cost, it is recommended to add a synergist (stearic acid) according to point 6 (4).

 4. Main quality indicators:

Product appearance Melting temperature (℃) Viscosity reduction range (%) Melting time (minutes) Refractive index Thermal decomposition degree (℃)

White waxy solid or powder 55 ～ 65 ° ≥98.0 ≤4 1.450 + 0.01 ≥320 °

Shelf life consumption The main applicable objects of inorganic powder modified by coupling agent

18 months Filler dosage 0.5-1% Medium and low polarity composite products such as PP, PVC, PE, PS, ABS, etc. or other natural rubber

 V. Filler activation modification treatment method:

 1. Pretreatment method: The filler is first stirred and dried (open) in a high-speed mixer (preheated to a material temperature of 100-110 ℃) for 10 to 15 minutes to make the filler moisture content less than 0.3%, and slowly add to the metering Crushing the coupling agent (be careful not to make the coupling agent hit the inner wall of the mixer by the stirring paddle), the modification time is 3 to 5 minutes.

 2. Direct addition method: If the water content of the filler is less than 0.3%, the coupling agent can be added directly when kneading in the high-speed machine. The addition method is the same as above. But should pay attention to the stearic acid, organic alcohol and other components containing carboxyl group and carboxyl group, be sure to add the coupling agent to activate the filler after 4 minutes, do not add it first or at the same time with the coupling agent to avoid accident The joint agent fails.

The above two methods, the effect of the previous method is good.

6. The key to successful application of coupling agent:

1. To ensure the activation and modification effect of the coupling agent on the filler, the high-speed mixer heated by the jacket must be used to activate and modify the filler.

2. When it is used for composite products such as PE, PP, ABS, PS and other granular resins, it is first made into a masterbatch or pellet form, and then mixed with these granular resins for application. The filling masterbatch produced by this type of coupling agent is used in composite systems. Its elongation at break, filling amount, surface gloss, material toughness and other physical and chemical properties are completely superior to other coupling agents.

3. To ensure that the filler modified by this coupling agent has good plasticizing effect with powdered resin (such as PVC) and its ingredients, it is recommended to use high-speed kneading and then extruding and pelletizing after dense mixing or plasticizing.

4. When used for inorganic powder modification, it is recommended to add a small amount of stearic acid as a synergist, which can reduce the cost under the premise of ensuring quality. The amount of stearic acid is generally 0.50% of the powder. The usage is to put coupling agent into the high-speed mixer to activate and modify the filler for 3 to 5 minutes, add a small amount of stearic acid, and then stir at high speed for 3 minutes. Do not add it first or at the same time with the coupling agent, you can have a good synergistic effect with the coupling agent. For example, in the production of PVC pipes, stearic acid is added after 3 to 5 minutes of modification with the coupling agent, and a large amount of activated calcium carbonate can maintain the good toughness and impact resistance of PVC pipes and can significantly improve the gloss of the products.

 7. Storage method:

The product should be stored in a dry and ventilated place, protected from light and heat during use