ADIPRENE® LFP 1950A is a PPDI-terminated polyester prepolymer having very low free PPDI content (typical < 0.1%) for easier management of health and safety during handling. This prepolymer is similar to ADIPRENE PP 1095 in composition and performance, while offering significant processing advantages including easier melting, lower viscosity, and increased pour life. ADIPRENE LFP 1950A yields a high performance 93-95 Shore A hardness elastomer when cured with VIBRACURE® A 250.
The high performance features of ADIPRENE LFP 1950A are due to PPDI (p-phenylene diisocyanate), a special building block that imparts exceptional properties to cast polyurethane elastomers. The unique combination of properties exhibited by PPDI-based prepolymers is superior to those available from standard prepolymers based on TDI or MDI.
Features of ADIPRENE LFP 1950A include:
· Low Free PPDI Content
· Lower Viscosity and Easier Melting
· Increased Pour Life
· Excellent Dynamics
· Excellent Tensile/Tear Strength
· Excellent Resilience
Hygiene
Although ADIPRENE LFP 1950A has a very low level of free PPDI monomer, this does not eliminate the need to manage health and safety issues responsibly when handling this product. Impervious gloves and goggles should be worn. Avoid contact with eyes, skin, and clothing, and wash thoroughly after handling. Avoid breathing vapor. Use only with adequate ventilation. In the absence of good ventilation or under emergency situations, self-contained or air-supplied respiratory protection is recommended. Before use consult MSDS for ADIPRENE LFP 1950A for additional information on potential hazards and handling precautions.
LIQUID PREPOLYMER PROPERTIES
% NCO 5.24 – 5.54
AE 1293 -1424
Appearance White/Off-White
Viscosity, Centipoise (Pa.s)
@ 86°F (30°C) (Solidifies)
@ 158°F (70°C) 5000 (50)
@ 185°F (85°C) 2700 (27)
@ 212°F (100°C) 1400 (14)
Specific Gravity
@ 158°F (70°C) 1.14
@ 212°F (100°C) 1.12
COMPOUND
ADIPRENE LFP 1950A Temperature, °F (°C) 185 - 212 (85 - 100) VIBRACURE® A 250, °F (°C) 75 (24)
% Theory, 95
PROCESSING CONDITIONS
Mold Temperature, °F (°C) 260 (127)
Pour Life, Minutes 6
Demold Time, Minutes 60 Minimum
Postcure Cycle, Hrs./°F (°C) 16/240-260 (116-127)
Notes: 1. Uniroyal Chemical VIBRACURE A 250 is specially formulated for PPDI prepolymers to improve mixing of prepolymer and curative during processing.
2. For best results, the mold should be pre-heated to the recommended temperature. If the mold cools during handling and casting, it is desirable to preheat it enough above the cure temperature to allow for its cooling.
3. Allow cast parts to condition for four weeks at room temperature before use.
Hardness, Shore A 93 - 95
100% Modulus, psi (MPa) 1400 (9.7)
300% Modulus, psi (MPa) 2000 (14)
Tensile, psi (MPa) 7000 (48)
Elongation, % 650
Tear Strength, pli [kN/m]
Split (D-470) 160 (29)
Bashore Rebound 57
Compression Set, Method B, 22 Hrs.
@ 158°F (70°C) 35
@ 212°F (100°C) 50
Specific Gravity 1.19
Compressive Modulus, psi (MPa), 3rd Cycle
5% 360 (2.4)
10% 700 (5.0)
15% 1000 (7.0)
20% 1350 (9.1)
25% 1750 (12)
All materials tested after conditioning at room temperature for four weeks.
Property values reported in this bulletin are for the specific composition shown. Additional colorants or additives of any kind may alter some or all of the properties. The data listed fall within the normal range of product properties, but they should not be used to establish specification limits nor used alone as the basis of design.
Disclaimer
Except as otherwise provided by law outside the USA, the following information should be noted.
The information set forth herein is furnished free of charge and is based on technical data that Uniroyal believes to be reliable. It is intended for use by persons having technical skill, at their own discretion and risk. The handling precaution information contained herein is given with the understanding that those using it will satisfy themselves that their particular conditions of use present no health or safety hazards. Since conditions of product use are outside our control, we make no warranties, express or implied, and assume no liability in connection with any use of this information. Nothing herein is to be taken as a license to operate under or a recommendation to infringe any patents.
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