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Elastomer environmental protection catalyst

5月 31st, 2021 product

Overview:

Product Name: Polyurethane elastomer environmental protection catalyst NT CAT E-129

Alias: polyurethane elastomer environmental protection catalyst, elastomer environmental protection catalyst, environmental protection catalyst, elastomer catalyst, elastomer catalyst NT CAT E-129

Product description: It has a special smell, is insoluble in water, and easily soluble in general polyurethane raw materials such as polyether and polyester polyol.

 

Character description:

The appearance of this product is light yellow transparent liquid, color (APHA) ?50; density 1.17g/cm3 (25 ?), viscosity 125mPa.s (25 ?), flash point 127 ?; has a special smell, insoluble in water, Easily soluble in general polyurethane raw materials such as polyether, polyester polyol, etc.

This product does not contain polybrominated biphenyls, polybrominated diphenyl ethers, lead, mercury, cadmium, etc. restricted by RoHS regulations, and does not contain nine types of organic tin compounds such as octyltin, butyltin, phenyltin, etc. Using the polyurethane material synthesized by this product can Adopted strict environmental protection regulations such as the United States and the European Union. In some areas of polyurethane, it is a substitute for eliminating traditional organic mercury, lead and other catalysts.

 

Product Features:

This product is developed to meet the requirements of products in the polyurethane CASE field (especially for polyurethane elastomers) without bubbles. It is completely different from commonly used amine tin catalysts. It has its own unique water suppression function, which can effectively shield the trace moisture and isocyanate contained in the polyurethane raw materials. Reaction to avoid the resulting CO2 bubbles (polyether polyol can be used without high-temperature vacuum dehydration), even in wet and rainy weather, it can effectively avoid the phenomenon of multiple bubbles, cracking, bulging, peeling, etc. Very similar to organic mercury.

The unique catalytic function of this product has a longer operating time than other products in this series, ensuring that the combined material maintains the original low viscosity and good fluidity before stirring evenly. This is very useful for reducing bubbles caused by mixing and quickly filling the mold cavity. Important; when the temperature in the system reaches 40 ?, the super catalytic effect of this product starts to appear, which can make the polyurethane composition reach the strength required for demolding within 20 minutes (or even shorter) after the mixing is completed, even without the need Subsequent heating and vulcanization have typical low energy consumption and high efficiency.

 

Application areas:

NT CAT E-129 has a good delay effect in this series of catalysts and has excellent hydrolysis resistance. When the temperature of the material is lower than 40?, the catalytic activity is very low. When the temperature of the material reaches 40?, its catalytic activity begins to appear. When the temperature reaches 50 ?, its catalytic activity increases rapidly, and when the temperature reaches 110 ?, its catalytic activity is stronger than ordinary organotin and bismuth on the market. NT CAT E-129 is very suitable for the combination of DETDA (E-100) as a curing agent, such as the combination of transparent ** shoe pulley and semi-polyurea, which has a longer pot life than other catalysts. To meet the needs of mold filling, it can produce skateboard wheels with hardness over 92A, shock absorbers and large products.

NT CAT E-129 is used in the MDI system using alcohol as a curing agent combination. It is characterized by a gentle reaction temperature rise curve and a smaller shrinkage than ordinary tin catalysts.

This product can be widely used in the production of polyurethane CASE field, single- and double-component sealants, coatings, adhesives, etc., used in aliphatic isocyanate, will not make the product yellow.

 

Instructions for use:

When using this product, it is recommended to add the polyol (Polyol, P material) component, and it is good to add it after vacuum degassing and before sealing, and stir it evenly. It can also be added to the isocyanate (ISO, I material) component, but it may be dangerous in the gel tank due to some raw materials, so please perform the suitability test first. The amount used is related to the product system and hardness. The general amount is 0.5 to 1‰ of the weight of the P material. Because different products have different environmental requirements, users are advised to do actual testing according to relevant standards.

 

Shelf life:

The unopened shelf life is 12 months.

Storage and transportation:

Should be sealed and stored in a dry, cool and ventilated warehouse

 

package:

200KG/drum Storage: It is recommended to store in a dry and cool area with proper ventilation. After the original packaging, please fasten the packaging cover as soon as possible to prevent the water and other substances from mixing into the product and affecting its performance. Store in a cool, dry place, keep the container sealed and avoid contact with oxides. Do not breathe dust, avoid skin and mucous membrane contact. Smoking, eating and drinking are prohibited in the workplace. After work, shower and change clothes. Store contaminated clothing separately and wash it before reuse. Maintain good hygiene habits. The company recommends that all polyurethane catalysts be stored in a dry, cool and properly ventilated place. All storage containers must be well sealed to avoid contact with water or other influential substances, because this may change the performance of the product in use. The storage temperature is 10°C to 30°C. Lower or higher temperatures are not suitable and should be avoided as much as possible.

Sponge hardener

5月 21st, 2021 product

New generation sponge hardener

In the production of polyurethane block sponges, adjusting the hardness of the sponge has always been a difficult problem. The sponge hardness can be adjusted by different methods. Generally, reducing the hardness of the sponge, that is, softening the sponge, does not change the other properties of the sponge much, but it is impossible to increase the hardness of the sponge without adversely affecting other properties of the sponge.

There are many ways to increase the hardness of the sponge. The first thought is to increase the hardness of the sponge by increasing the density of the sponge. For every 1 kg/m3 of sponge density, the hardness can be increased by about 1.0 kPa (CLD 40%), but this will increase the cost; using filler materials (CaCO3 and BaSO4) can also Increase the hardness, but this method is not permanent and will reduce the physical properties of the sponge; there is also a common method is to add polymer polyols, this method can increase the hardness, but the cost of the sponge will be greatly increased; a This method is to strengthen the three-dimensional structure of the sponge, that is, to increase the number of cross-links, which can be achieved by increasing the TDI index. However, this method will change the foam cell structure of the sponge, reduce the permeability and increase the number of closed cells. In addition, as the reaction temperature increases, the risk of yellowing or even ignition in the block increases; another method is to accelerate the gelation reaction, that is, increase the tin catalyst. This method will also change the cell structure of the sponge and reduce the permeability.

According to industry needs, Xindian Chemical has conducted a long-term study on the hardness mechanism of sponges. As a result of these studies, the newly developed sponge-specific hardening additive series meets customer needs. The following table is a list of the products of Xindian Chemical:

NT H12 NT H15 NT H18

Type Amine Reactive Hardener Polyester Hardener Polyether Hardener

Advantages and Disadvantages The product itself has an ammonia odor, can participate in the reaction, has no VOC emissions, and is miscible with the combination material system. No formula adjustment is required, and the amount of addition is small. It can participate in the reaction and has poor compatibility with the composite material system. It can reduce the TDI index to save costs and is cheap. It can participate in the reaction, can be miscible with the combination material system, can reduce the TDI index and save costs, the amount of addition is large, and the comprehensive cost performance is high.

Taking NT H18 as an example, specific experiments show its performance and effect.

Unlike other hardening additives on the market, NT H18 can significantly increase the hardness without affecting the foam cell structure. When NT H18 is added to the formulation, there is no need to change the amount of TDI or tin to maintain the open-cell structure. The amount used is 1 to 5 pphp, depending on the required hardness increase. Depending on foam density, formulation and production parameters, the hardness can be increased by 35% without significantly changing the pore structure.

Table 1: The general formula of the foam of the experiment box with a foam density of 16kg/m3 is as follows:

Polyol OHN 48 (pphp) 100-X

Total water (pphp) 5.2

NT CAT A-33 (pphp) 0.15

NT CAT T-9 (pphp) 0.25

Tegostab B8160 (pphp) 1.3

Methylene Chloride (pphp) 7.5

NT H18 (pphp) X

TDI Index 110

As shown in Figure 1, under the reference formulation laboratory conditions, the density of 16kg/m3 sponge added 3pphp and 5pphp NT H18, its hardness increased by 25% and 35%.

Figure 1: The hardness change curve of NT H18 sponge with 3pphp and 5pphp added

 

NT H18 can be used not only to increase hardness, but also to reduce the content of TDI, polymerized polyol or tin in the formulation while maintaining sponge hardness. Therefore, if necessary, it can be used to reduce costs and promote process conditions (reaction temperature). As shown in Table 2, under the reference formula laboratory conditions, adding 3pphp of NT H18 to a 21kg/m3 sponge reduces the TDI index from 105 to 100, the hardness remains almost constant, and the sponge yellowing problem can be significantly improved , As shown in Figure 2.

Table 2: The general formula of the sponge with a density of 21kg/m3 in the experiment box is as follows:

Polyol OHN 48 (pphp) 100 97

Total water (pphp) 4.8 4.8

NT CAT A-33 (pphp) 0.20 0.20

NT CAT T-9 (pphp) 0.22 0.22

Tegostab B8232 (pphp) 1.0 1.0

TDCPP (pphp) 10 10

NT H18 (pphp) 0 3

TDI Index 110 105

Figure 2: Comparison of the yellowing results of the sponge obtained in the experiment

Summary: Based on the above experimental results, it can be concluded that NT H18 can significantly improve the hardness of the sponge without affecting the other physical properties of the sponge itself, and can improve the yellowing problem of the sponge to a certain extent.

self-skinning pinhole elimination agent

5月 21st, 2021 product

Overview:

Product Name: NT CAT FG1021

Alias: pinhole elimination agent, cell improvement agent, size stabilizer, foam stabilizer, non-silicone silicone oil, surfactant, polyurethane monosodium glutamate, NT CAT FG1021, self-skinning pinhole elimination agent, polyurethane foam catalyst, foam catalyst, Self-skinned catalyst, self-skinned foam catalyst

 

description:

NT CAT FG1021 is a brown transparent liquid, compounded by non-silicon surfactant, slightly soluble in water, has good emulsification and dispersion, and can form a good foam structure when combined with silicone oil in polyurethane foaming formula, especially It has the functions of improving the bonding strength with other composite materials, providing more uniform cell structure and dimensional stability, and excellent appearance (especially to solve the problem of self-skinned pinholes). It is known as “MSG” in the polyurethane industry.

 

application:

NT CAT FG1021 is widely used in soft foam, hard foam, semi-rigid foam, self-skinned and other high-grade foam products. The recommended dosage is 0.3~1.5%.

 

Storage and transportation:

Should be sealed and stored in a dry, cool and ventilated warehouse

Shelf Life/shelf life: 12 months.

 

Reference formula:

Index name Index result

Appearance Brown oily liquid Brown oily liquid

Active matter content ?70% 72%

Cloud point 15 14

Viscosity 25? 200±50 235

NT CAT FG1021 pinhole elimination agent cell improvement agent size stabilizer foam stabilizer non-silicone silicone oil polyurethane monosodium glutamate self-skinning pinhole elimination agent

NT CAT FG1021 pinhole elimination agent cell improvement agent size stabilizer foam stabilizer non-silicone silicone oil polyurethane monosodium glutamate self-skinning pinhole elimination agent

Save:

Store in a cool, ventilated warehouse. Keep away from fire and heat. Prevent direct sunlight. Keep container tightly closed. It should be stored separately from oxidants and edible chemicals, and avoid mixed storage. Equipped with the appropriate variety and quantity of fire equipment. The storage area should be equipped with leakage emergency treatment equipment and suitable containment materials.

 

package:

200KG/drum Storage: It is recommended to store in a dry and cool area with proper ventilation. After the original packaging, please fasten the packaging cover as soon as possible to prevent the water and other substances from mixing into the product and affecting its performance. Store in a cool, dry place, keep the container sealed and avoid contact with oxides. Do not breathe dust, avoid skin and mucous membrane contact. Smoking, eating and drinking are prohibited in the workplace. After work, shower and change clothes. Store contaminated clothing separately and wash it before reuse. Maintain good hygiene habits.

Technical Support Zhou Gong: 183 0190 3159

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