Unsaturated Polyester Resin

Material Science is not my field, so don't expect me to come up with sound proposal for a correct hardener and filler material. But it appears that English is not your primary language and you left out a critical point to get a valid answer.

My question is if some body can tell me what is the additional components; like glass fiber and hardener; that I should add in order to get a final material that is enough strong (mechanical) [strong enough to do what?] and in the surface is possible to paint

Without knowing what you intend to do with this reinforced resin material, people don't want to waste there time making a suggestion. I would expect that your resin selection will dictate which chemical hardener must be used and which paints will be suitable.

Now that I've made a serious attempt to answer you. Allow me to make a few silly answers to point out the lack of direction you've given us.

If you want high mechanical strength with low mass at any cost you could try a fullerene based carbon fiber woven cloth fabric.

If you want a self illuminating material, you could start with a cobalt steel mesh fabric. Bombard the steel with a neutron beam to transmute the cobalt to cobalt 60. Add phosphorous to your resin and bingo, a perpetual light suitable for sterilizing anything.

If cost is your major concern, just look at the material around you that you have trouble getting rid of. It's obviously very durable already so just dumping that in will solve two problems.

thank you any way

redfred is right. Pitiful , but typical lack of information. You must have gotten this, "Unsaturated Polyester Resin" from somewhere. Go to whomever/whatever the source was for the, "Unsaturated Polyester Resin" and ask them/it about fillers and catalysts.

We can't help you.

thank you any way

OK, How this? .5% MEKP and 10% chopped glass.

There ya go. Please send me a consultation fee. $100.00/ half hour is customary.

I'll grant you that you are polite about it, but you are wasting our time.

Hi,

The answers you have received are unduly harsh since clearly English may not be your first language.

I lecture in Composites technology to students who are complete beginners, so I understand where you are starting from. My real job is making composite high performance boats: see www.explorermarine.co.uk.

Mix ratios are supplier dependant, so referring back to the supplier would be sensible.

If you are using a casting resin, then no reinfoorcement will be required to make ornaments or chess pieces. For any items which will receive a rougher life, then a high percentage of a suitable reinforcement is needed. The starting point is E Glass chopped strand mat, and we should be aiming for 25% or better.

In high spec parts, where cost is not such an issue - I lecture on Formula 1 parts - then matched mould autoclave and vacuum, with carbon, or carbon aramid reinforcements using an epoxy resin will lead to much stronger parts at reinforcement ratios of 75 % or higher.

Going back to the simple Polyester resin, we use an MEKP catalyst at 1 - 2 % depending upon the workshop temperature and the size of the mix, since pot life is much shorter than gel time.

Hope this helps

Hugh Mattos

Mattos

Now I can tell you thank you indeed, your reply was really usseful

Regards

Norberto

The catalyst is readily availabe in different set up times and amounts. Hi Point is a brand name, Hi point 90 would give you about 15 minutes of work time before setting.

Use a mold release!

Glass fibers of may lengths can be added for strength. Make sure they are treated fibers for resing absorbtion.

Polyester is paintable, having a typical surface energy of 38-40dynescm2, just sand the surface and paint.

Surf board builder?

We design and build plastic surface treating equipment.

Thus the knowledge of surface energy. Interesting industry. Plasma? Flame? Abrasives?

Who are your customers?

BTW, this is all just idle curiosity.

Mostly open air plasma. Hundreds of customers all over the world. From containers to the space shuttle. See www.lectrotreat.com.