Rubber & Products

Caytue 31DA Diamine Curatives CAS 21646-20-8 Polyurethane Curing Agent

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XYlink311 is equal to Caytue?31 DA. CAS NO.:21646-20-8 It is a delayed action diamine curative primarily for use with urethane prepolymers based on TDI (toluene diisocyanate), or MDI (diphenylmethane diisocyanate) and polyether polyols. It consists of a complex of methylene dianiline (MDA) and solium chloride dispersed in dioctyl adipate. It has a very low free MDA content. At room temperature, it is virtually non-reactive. However, when heated to 120℃(After catalyst added, it can take the temperature down to 70-80℃), the salt complex unblocks and the freed MDA rapidly cures the prepolymer, forming a tough elastomer. As a liquid with reasonable viscosity, XYlink311 can be mixed with prepolymers at room temperature, and it is suitable for use with conventional processing techniques such as: open casting, transfer, compression or liquid injection molding and rotational casting as well as other techniques such as dipping that require one pot systems. In addition, it is uniquely suitable for specialty applications, which require large surface areas; intricate design, microwave curing or other situations that require essentially unlimited work life and stability. The curing properties of XYlink311 are similar to MOCA. When it mixes with prepolymers without heated, it will not occur gelatin phenomena, it can be used in MDI systematic prepolymers. XYlink311 can be processed satisfactorily with hand mixing or automatic mixing casting equipment for process
Chemical Name:4,4& acute;-Methylenebis(aniline), compound with sodium chloride (3:1)

Molecular Weight: 653.2

CAS No.: 21646-20-8

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SPECIFICATION:

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Appearance | White viscosity liquid |
Odor | Faint amine |
Amino Nitrogen ,% | 5.60 |
Equivalent Weight | 250 |
Moisture content ,% | ≤0.02 |
Free MDA ,% | ＜0.2 |
Total Ash ,% | 4.4 |
Decomposition Temp ,℃ | 120( After catalyst added, it can take the temperature down to 70-80℃) |
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APPLICATION AND PERFORMANCE:

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XYlink311 is equal to Caytur?31 DA. It is a delayed action diamine curative primarily for use with urethane prepolymers based on TDI (toluene diisocyanate) or MDI (diphenylmethane diisocyanate) and polyether polyols. It consists of a complex of methylene dianiline (MDA) and solium chloride dispersed in dioctyl adipate. It has a very low free MDA content. At room temperature, it is virtually non-reactive. However, when heated to 120℃(After catalyst added, it can take the temperature down to 70-80℃), the salt complex unblocks and the freed MDA rapidly cures the prepolymer, forming a tough elastomer. As a liquid with reasonable viscosity, XYlink311 could be mixed with prepolymers at room temperature, and it is suitable for use with comventional processing techniques. such as: open casting, transfer, compression or liquid injection molding and rotational casting as well as other techniques such as dipping that require one pot systems. In addition, it is uniquely suitable for special applications that require large surface areas, intricate design, microwave curing or other situations which demand essentially unlimited work life and stability. The curing properties of XYlink311 are similar to MOCA. When it mixes with prepolymers without heated, it will not occur gelatin phenomena, it can be used in MDI-based prepolymers.

XYlink311 can be applied satisfactorily with hand mixing or automatic mixing casting equipment for processing liquid urethane elastomers.

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PACKAGING:

20KG net weight in plastic drum.

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STORAGE:

This product should be stored in a dry and good ventilated place at room temperature in case to be effected by damp, keep it away from direct sunlight if necessary and make sure to keep the remanent products well sealed after using.
ing liquid urethane elastomers.
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