Polyester-based one-component interlocked polyurethanes cure after exposure to heat (135-140°C). As a one-component product, they do not require mixing, and their main advantage is the low waste level of the system (no risk of incorrect proportions). In addition, these systems are characterised by easy venting and absence of volatile isocyanate vapours (which results from their chemical bonding in the mixture). Available hardness range of one-component systems extends within Shore 20-90.
Short processing instruction – MB Resin
MB Resin – heat processing instruction:
- Melt MB Resin at a temperature NOT HIGHER than 55°C. If the melted resin has high viscosity and it is difficult to be poured out of the package, the melting temperature can be gradually increased by 5°C; however, 70°C must not be exceeded.
- If the molten resin is not homogeneous or it is creamy in colour rather than amber, the mixture has undergone sedimentation. In this case, thoroughly mix the contents of the package using a drilling machine, and store the package upside down after closing.
- Coat the mould with an appropriate release agent.
- Heat the moulds to 80°C. After pouring the resin into the mould, increase the oven temperature to 110°C for two hours (closed metal moulds are recommended).
- MB Resin cures for 16-18 hours at 135-140°C.
General instructions for polyurethanes processing