Two Component Polyurethane Resin for Mould Making
1. Description
Pu rubber is two-part compounds that vulcanizes at room temperature.With 100% polyurethane resin properties. Containing no contain solvent,after curing, it will be forming a is light yellow clear also glittering layer.it's used extensively in industry, voltage transformer potting. A/B after curing ,it has excellent weatherability and resistance to UV - irradiation.Environmentally product,when in the sunshine,it can't change the color within short time.
2.Characteristics
PArt A is multi isocyanate compound,part B is polybasic alcohol compound,we can adjust
the hardness,working time ,curing time and viscosity with your references,meet the different needs whatever produced by machine or manul
Composition:
Part A 1. isocyanate R-N=C=O 2.polybasic alcohol R-[O-CH2-CH]nOH
part B 1.polybasic alcohol R-[O-CH2-CH]nOH 2: Isocyanate R-N=C=O
3.Catalytic agent C8H8HgO2;CH3COOC6H5Hg
4. Properties
| Color |
part A :Colorless Transparent Liquid, PartB: Pale yellow viscous liquid |
| Viscosity(25℃) |
partA:curing agent:4000±50Mpa.s Part B : Bases:1900±50mpa.s |
| After mixing the viscosity: 2900±50 mPa·s |
| Density(25℃) |
Part A: 1.01±0.05 g/cm3 |
| Part B: 1.00±0.05g/cm3 |
| Mix ratio |
1:1 |
10:9 |
10:8 |
| Working time |
19mins |
22mins |
25mins |
| Curing time |
1hrs |
2hrs |
4hrs |
| Characteriatical after curing : |
Unit or test condition (eye- measurement ) |
| Hardness(shoreA |
70±5 |
63±5 |
55±5 |
| Apperance |
Light yellow transparent surface, smooth without ripple |
| Density After curing |
1.10±0.05g/cm3 |
| Elongation |
200% |
ISO 527 |
| Water absorption |
≤0.2% |
After 30 days of immersion |
| Temperature range |
-30℃~80℃ |
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Weatherability
|
Aging and weather test in short time,coll |
oIrradiation(340nm):0.5w/m2; |
| color doesn't change to yellow.no oil on the surface,no pulverization |
Relative humidity:(60~80)% |
Curing time: constant temperature 25 ºC,Mix ratio 1:1,
working time :19mins,Curing time: 1hr .
Mix ratio 10:9,working time:22mins, Curing time:2hrs.
Mix ratio:10:8 working time:25mins, Curing time 4hrs.
when temperature reduced,curing time will be increased;Recommended to use heating cure,temperature : 60~70℃
5. Storage life
12month( Store at room temperature 15℃ to 25℃ in sealed drum).
Product Tags:
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Mould Making Polyurethane Resin Transparent Liquid Images
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