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P-1000 P-2000 is a modified polyether polyol with high primary hydroxylation. Compared with ordinary polyether polyol, it has the characteristics of high reactivity, high mechanical strength and good water resistance and weather resistance. Widely used in polyurethane resin synthesis, adhesives, elastomers, coatings, etc.。
Basic parameters
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project
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unit
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Specification
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P-1000
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P-2000
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Exterior
moisture
pH
Hydroxyl value
Viscosity
Acid value
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VISUAL
%
Triol
mgKOH/g
25℃，mPa.s
mgKOH/g
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Transparent liquid
0.05 MAX
6.0 ~ 7.0
90-100
1000±100
0.05 MAX
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Transparent liquid
0.05 MAX
5.0 ~ 6.0
50-60
1000±100
0.05 MAX
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Features:
1. High reactivity
(1) High reactivity with isocyanates:
(2) Shortened reaction time leads to lower overall cost: Compared with ordinary PPG, it has a shorter reaction time and thus reduces production costs.
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Isocyanate Type
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temperature reflex
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P-2000
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Ordinary PPG
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TDI
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75℃
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8
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12
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IPDI
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115℃
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12
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32
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HDI
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85℃
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8
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40以上
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Note: The above time is the reaction time when the test response rate is 100%. Test conditions: OH/NCO=1/2 (mol ratio), reaction without catalyst.
(3) Short curing time: Compared with ordinary PPG, the curing time can be shortened, and it has high reactivity at different temperatures, which can reduce the amount of catalyst added.
(4) Reduce the generation of CO2: The primary hydroxyl group in the P-2000 structure can preferentially react with isocyanate to reduce the generation of CO2.
2. High mechanical strengthThe following charts show the physical properties of polyurethane made with P-1000 and P-2000:
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project
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1000
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2000
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P-1000
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PP-1000
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PTMEG1000
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P-2000
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PP-2000
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PTMEG2000
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Solid %
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30
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30
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solvent
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DMF
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DMF
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polymer molecular weight
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115000
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110000
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125000
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170000
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170000
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150000
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Composition: polyol/ethylene glycol/MDI R(NCO/OH)=1.05
Compared with ordinary PPG, it has higher mechanical strength, and the synthetic leather made of P series products has a softer handle than the products made of PTMEG.
Mechanical strength evaluation results:
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P-1000
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PP-1000
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PTMEG1000
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P-2000
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PP-2000
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PTMEG2000
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Tear strength (MPa)
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12
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3
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32
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30
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21
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59
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Tear stretch %
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750
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1000 or more
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740
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740
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925
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610
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100%mod（MPa）
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1.8
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0.6
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1.9
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3.9
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3.5
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4.7
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300%mod（MPa）
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2.9
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1.3
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3.7
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9.0
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7.3
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10.2
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3. High durability: Compared with ordinary PPG, it has better water resistance and weather resistance.
Strength retention after weathering test:
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project
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P-2000
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PP-2000
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PTMEG2000
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Early stage
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Tear strength (MPa)
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30
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21
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59
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Weathering test after 3 days
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Tear strength (MPa)
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24
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16
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55
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Strength retention %
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81
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75
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93
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Sample condition
Device: SUPER UV TESTER; light source: metal halide mercury lamp; irradiation intensity: 75mW/cm2; irradiation temperature: 73°C 50%Rh×3.8hr; 38°C 95%Rh×1hr for 3 days (15 cycles).
Strength retention rate after water resistance test:
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project
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P-2000
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PP-2000
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PTMEG2000
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Early stage
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Tear strength (MPa)
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30
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21
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59
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After 5 days of weathering test
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Tear strength (MPa)
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20
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9
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56
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Strength retention %
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68
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44
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95
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Experimental conditions: immersion in NaOH 10%wt solution for 5 days at 70°C.
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