In uk.d-i-y The Natural Philosopher wrote:
Jimbo wrote:
I am in the UK and would like to ask some questions about glues.

QUESTION ONE
Does anyone know what category or type of adhesive is Unibond's NO MORE
NAILS sold for general purpose home use?
See http://www.dm-tools.co.uk/images/UNINMNC.jpg
Does anyone have an ingredients list for this adhesive?

I think its is an acrylic type glue.

QUESTION TWO
Is NO MORE NAILS stronger for woodwork jobs than that white or yellow
runny woodworking adhesive which I believe is some sort of PVA adhesive
that dries off to leave a hard resin.

its better where there are gaps..bit any CLOSE fitting glue joint is
somewhat stronger than the wood by and large.


QUESTION THREE
Does NO MORE NAILS form a stronger bond to the materials being glued
than Araldite? Can NO MORE NAILS be heated to a greater temp than
Araldite (which I believe weakens at 70 C)?

MM. Araldite will go higher than that if well mixed and heat cured.

With a slow setting epoxy like that, heating the mixture to about 70C
while mixing ensures a very good strength, and heating it to that sort
of temp while it dries seems to make it set harder.

Epoxys have a 'gel' temperature.

When they set firstly, they have a fraction of unreacted liquid, that's
bound in place by the matrix of already set chains.
A small fraction of this will set at room temperature.

When you heat this up to a certain level, the epoxy gets 'rubbery', and
heated a bit more may substantially weaken it.
However, at this time, the ends of the unreacted liquid molecules are
wiggling around due to the heat, and meeting their opposite numbers, and
rapidly setting more completely.
Heating an epoxy much over the temperature it has been set at will
always do this, but as less and less of the liquid remains at high
temperatures, the effect is dramatically less.