Xpres Easy Dome - Manual (Page 9)

9
Safety & Technical Data
Important: Safety Guidelines
Always use protective gloves and safety glasses.
Avoid prolonged contact with skin. May cause sensitization
by skin contact.
Avoid contact with eyes.
Avoid breathing vapours.
Always use in well ventilated area.
After contact with skin, wash immediately with soap & water.
If swallowed seek medical advice.
If you experience any health related problems during use,
seek medical advise.
Data Sheet
Z-7250 Polyurethane compound
Product name: Z-7250 Revised 12/7/2001
supersedes: 11/10/00
Description
Z-7250 is a clear polyurethane compound for use on decals,
labels, emblems and other decorated substrates. Z-7250 is
a low viscosity material with excellent flow is also suitable for
potting solar cells.
Hazards
Part A is manufactured for commercial use only. (see MsDs).
Part B contains aliphatic diisocyanate and polymeric
isocyanates. see MsDs for safe handling instructions.
Storage
Both Part A and Part B are sensitive to moisture and
containers must be kept closed during storage. storage
temperature can be ambient, however the material should be
warmed to 90 - 110°F before using.
Component Z-7250 Part A Typical Liquid Properties
Appearance Hazy liquid with a slight yellow tint
specific Gravity 1.025 @ 100°F
Weight per Gallon 8.53 @ 100°F
Brookfield Viscosity 75-200 cps. @ 100oF #2 spindle RVT @
20 rpm
Hydroxyl Value 260-280
Acid Value less than 0.15
Water content less than 0.1%
Component Z-7250 Part B Typical Liquid Properties
Appearance clear liquid
specific Gravity 1.10 @ 100°F
Weight per Gallon 9.13 @ 100°F
Brookfield Viscosity 100-600 cps. RVT #2 spindle,
50 rpm @ 100°F
nco Value 22.2-23.2
Mixing Information
Ratio by Weight Part A 49
Part B 51
Ratio by Volume Part A 50
Part B 50
Curing
Gel Time
7-9 minutes, 100 grams @ 100°F
cure Time 100-200oF 24-4 hrs (dependant on mass
and temp)
Development Associates, Inc Ds Z-7250 Page 2 of 2
All information, recommendations and suggestions contained
herein are to the best of our knowledge true and accurate,
but are made without guarantee. no warranty of fitness for a
particular purpose is made. nothing herein shall be
construed to allow infringement of any patent
Typical Physical Properties
Hardness
85-90 shore A 40-45 shore D
Heat Aging 7 days @ 85°c, no change
Weathering Accelerated weathering Rs-4 sunlamp 200
hours with water spray, no change
Humidity Resistance 7 days 100%RH @ 100°F, no change