AOC Palatal? A 400-972 m-Phenylunsaturated Polyester Resin for FRP Structural Layers

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Isophthalic polyester resin for FRP structural layers
Components based on Palatal? A 400-972 have excellent mechanical and electrical properties with good stiffness, dimensional stability and impact resistance.

mileage

cost-effectiveness

Good impact strength

Excellent mechanical and electrical properties

Balance of rigidity and flexibility, dimensional stability

Good water resistance

Chemical/Physical Properties

Palatal? A 400-972 is an unsaturated polyester resin based on isophthalic acid and standard diols dissolved in styrene. The resin has medium viscosity and high reactivity.

Main applications/key features

Palatal? A 400-972 is suitable for a wide range of applications. Molded products made from this resin have excellent mechanical properties, high resistance to heat distortion and high impact resistance.
Palatal? A 400-972 is particularly suitable for the production of pipes, profiles and tanks in factory construction, building infrastructure as well as in ship and car bodies. It is a versatile resin for hand and spray coating, fiber winding, pultrusion molding, grid molding, cold press molding and resin injection processes.

Certification and authorization

Cured non-reinforced Palatal? A 400-972 conforms to DIN 16946/2, type 1140 and is classified according to EN 13121-1 as group 2B.
The mechanical properties of Palatal? A 400-972 and its accelerated aging properties in hot water meet the requirements of GB/T 21238-2016 for structural layer resins in glass fiber reinforced plastic mortar pipes.

Typical Properties of Liquid Resins

Performance indicators	numerical value	unit (of measure)	Test Standards
flash point	33	°C	TM 2800
Stability (no initiator, dark environment, 25°C)	6	moon	-

Product Specification

Performance indicators	numerical value	unit (of measure)	Test Standards
exterior condition	quiet	-	TM 2265
acid value	8-14	mgKOH/g	TM 2401
Viscosity @ 23℃	400-550	mPa.s	TM 2013
solid	55-61	%	TM 2033
Gel time, 25-35°C	15-25	minutes	TM 2625

Remarks: Reactivity measurement at 25°C: 1.5 g Butanox? M50 (Norelix) and 1.0 g Accelerator NL 49P (Norelix) were added to 100 g of resin.

Resin casting body properties (typical values)

Performance indicators	numerical value	unit (of measure)	Test Standards
tensile strength	80	MPa	ISO 527-2
Tensile modulus of elasticity	3300	MPa	ISO 527-2
Elongation at break	4.0	%	ISO 527-2
bending strength	140	MPa	ISO 178
Bending modulus of elasticity	3300	MPa	ISO 178
Impact strength (without notch)	20	KJ/m2	ISO 179
heat distortion temperature	95	℃	ISO75A

Test conditions:
Cure using 1.0 g Butanox M50 and 0.2 g Accelerator NL 49P added to 100 g of resin. Leave at room temperature for 24 hours, then post cure at 80°C for 24 hours.
The test temperature was 23±2°C and the relative humidity was 50±5%.

Processing Guide

Maintain full strength catalyst levels between 1.01 TP3T and 2.01 TP3T of total resin weight.

Maintain workshop temperatures between 18°C and 32°C and humidity between 40% and 90%. Stable workshop conditions help maintain consistent gel times and help manufacturers produce high quality parts.

Palatal? A 400-972 does not normally have a tack-free cure. To ensure tack-free curing of surfaces exposed to air, a suitable additive should be added to the final resin layer (e.g., 5% paraffin wax with MP 46-48°C dissolved in styrene in a solution of 10%).

Food contact applications require post-curing to reduce residual styrene to a range of 0.01-0.21 TP3T. The final cured state can be optimized by post curing at higher temperatures (e.g. 80°C) for several hours.

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