Home > VansAirForceForums

- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

Prev Previous Post   Next Post Next
Old 09-29-2015, 07:10 PM
Doug's Avatar
Doug Doug is offline
Join Date: Dec 2005
Location: Sydney, Australia
Posts: 426

I have had some experience with polyurethanes - we learned a lot - plenty can go wrong. I do applaud your pragmatic approach and will watch for your progress.

The term 'polyurethane' is about as generic as 'fibreglass'. Rudimentary differences in the chemistry has significant impact on properties. Suppliers have a broad catalog of products and properties to choose from. Era in my country is one such company, usually they will supply samples for serious potential customers.

The usual supply format is as a multipart (most commonly 2) resin. Mixing - simple pot mixing with stirrers will require de-gassing in a vacuum pot so requires a longer pot life, the next easiest is to use viscostatic (tubes with a series of mix blades inside) dispenser.

Pre-cast PU's such as sheet can be a mixed bag - pure PU will have a liquid clear appearance in an amber colour - be suspicious of a milky appearance or coloured stock.

Some boutique suppliers of PU formulations exist although I no longer have contact details for them. Tell them your requirements and application and they can provide formulations to suit. Tell them something can't be done in PU is like a red rag to a bull.
Doug Gray
RV-6 completed, flying since July 2010
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -6. The time now is 09:50 PM.

The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.