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Bonding

Bonding

Polyurethane- or cyanoacrylate- based systems for bonding Desmopan® and Texin™ are supplied by the adhesives industry under a variety of trade names. Cyano-acrylate adhesives cure extremely quickly, but are brittle. The bonded joint breaks under pressure, so they are only suitable to a limited extent for elastic, flexible materials such as TPU. They should only be used for temporary bonds or bonds that are not subject to bending.

Polyurethane adhesives take longer to cure but, like Desmopan® and Texin™, are flexible and elastic. They are therefore ideal for long-lasting bonded joints.

Suitable Solvents (for solvent bonding) for aromatic Desmopan® and Texin™ - grades are namely DMAC (Dimethylacetamide), THF (Tetrahydrofurane) or NMP (N-Methyl-2-pyrrolidon), as they etch the surface of TPU so deeply, that permanent bonding can be achieved. For aliphatic Desmopan® and Texin™ - grades DMAC (Dimethylacetamide) or NMP (N-Methyl-2-pyrrolidone) can be considered, suitable only to a limited extent (only for not cured articles) is also THF (Tetrahydrofurane).

The multiplicity of our grades and the possible combinations with solvents do not allow a more detailed statement and cannot compensate for own trials with the parts and articles in question.

These solvents are harmful to health, and it is essential that the information given in the safety data sheets be observed.

1,3 Di-oxolane (CAS-Nr. 646-06-0) has a lower risk potential and can perhaps be used as an alternative solvent after extensive trials and safety considerations of your own.

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