Norpol 444-M888

Technical data for Norpol 444-M888
Formerly known as Beetle 888X

Description:
NORPOL 444-M888 is a pre-accelerated, thixotropic, orthophthalic resin formulated to give extremely low styrene emission.

Characteristics:

• Very low styrene emission resulting in lower styrene levels in workshop atmospheres.
• Improved water resistance making the resin ideally suitable for marine environments.
• Low viscosity allowing rapid and efficient fibre wet-out in both spray and hand lay-up.
• Long pot life combined with rapid cure allowing fast mould turn round. The quick curing characteristic is reflected in a relatively short green-trimming stage.
• Lower exotherm enabling thick sections to be fabricated with much reduced risk of distortion, discolouration, pre-release, or damage to mould surface.
• Approved by Lloyds Register of Shipping for use in the construction of boats moulded under their survey.

When a laminate is built up in stages with intermediate curing, each operation should be finished off with a normal resin/glassfibre ratio. Any surface area of a cured laminate having an excess of resin, must be abraded before the laminating is continued. With a normal resin/glassfibre ratio on the laminate surface, the interval between each operation must not exceed 48 hours without abrasion.

Prolonged storage or unfavourable storage conditions may cause slight separation, hence agitation of the resin before use is recommended.

Physical Data in Liquid State at 25°C

All Norpol products are Quality Controlled with the specified catalyst. However, alternatives are available and all users should be aware that a single catalyst formulation couldn't provide optimum results in all resin systems. The interaction between the catalyst and the inhibitor/accelerator systems used in our products is complex and varies from resin to resin. Consequently the gel and cure characteristics provided by alternate catalysts can vary greatly from those specified. It is, therefore, absolutely essential that the user evaluate each alternate catalyst in each product before full-scale manufacture is started.

In common with other preaccelerated polyesters gel time drift occurs on storage. To compensate for this more catalyst may be required.

Mechanical Data in the Cured State:
Satisfactory laminates for many applications can be made from Norpol resins by curing at a workshop temperature of 18-20oC. However, when optimum properties and long term performance are required, e.g. chemical resistance, the laminate should be postcured. After demould, the laminate should be allowed to mature for 24 hours at the workshop temperature (18-20oC). A postcure cycle should then be used, this will vary from product to product depending upon the HDT of the resin. Suggested cycles can be found in our Technical Bulletin Number 1. A postcure cycle is most effective when carried out immediately after the initial 24-hour maturing period.

Fully post-cured:

Safety Data:
Safety Data Bulletin No. 1 applies to NORPOL 444-M888

Disclaimer:
The information in this Bulletin is provided to users to ensure that the product is used effectively and in conjunction with the Safety Data Bulletin, is used safely. The information is given to the best of our knowledge and is based on laboratory tests and practical experience. Polyester resins and Gelcoats are often used under conditions outside our control and we therefore cannot accept liability for the performance of our products or for any claims in respect thereof arising out of the use of the products other than as a result of our negligence. It is our policy to continually improve our products and therefore the information given in this Bulletin is liable to modification.

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