Product Description

Application

Crystic 474PA was developed for use in a wide range of applications throughout the chemical industry, and is suitable for the construction of tanks, pipes and fumestacks to operate in environments where heat and chemical resistance are both required. It is ideally suited to the fabrication of heat resistant, dimensionally stable moulds for cold and heat assisted contact moulding and hot press moulding processes. Crystic 474PA is a versatile resin suitable for use in contact moulding and automated processes such as pultrusion.

Features & Benefits

Crystic 474PA can be used in conjunction with glass fibre backed polypropylene (Celmar), and suitably treated uPVC, to produce dimensionally stable composites with high heat and chemical resistance.

Approvals

Crystic 474PA meets the requirements of BS 3532:1990, for a Type C (heat resistant) polyester resin.

Product Characteristics

Formulation

Crystic 474PA should be allowed to attain workshop temperature (18?C ? 20?C) before use. It needs only the addition of a catalyst to start the curing reaction. The recommended catalyst is Catalyst M (or Butanox M50). The catalyst should be added at 2% into the resin shortly before use, and thoroughly dispersed. The geltime of the resin can be approximately determined from the table below.

Pot Life

The resin, mould and workshop should be at, or above, 15?C before curing is carried out.

Additives

Crystic 474PA can be pigmented by the addition of up to 5% of Crystic Pigment Paste. However, fillers and pigments can adversely affect the heat and chemical resistance of Crystic 474PA, and customers should satisfy themselves that the required properties will be obtained before any large scale use. When reduced fire hazard laminates are required, up to 20% by weight of Crystic 474PA can be replaced by Crystic Prefil F.

Post Curing

In order to develop optimum heat and chemical resistance, Crystic 474PA laminates must be post cured before being put into service. Mouldings should be allowed to cure for 24 hours at 20?C – and then be oven cured for 3 hours at 80?C.

Where laminates are to withstand higher service temperatures than 80?C, a further period of post cure at the operating temperature should be given.

Storage

Crystic 474PA should be stored in the dark in suitable closed containers. It is recommended that the storage temperature should be less than 20?C where practical, but should not exceed 30?C. Ideally, containers should be opened only immediately prior to use.

Typical Properties The following tables give typical properties of Crystic 474PA when tested in accordance with BS 2782.

Additional information

Data Sheets