VESTALITE® P 311: High‑Performance Polyurethane Resin for Fast‑Curing Prepregs

VESTALITE® P 311 is a polyurethane based resin formulation specially designed as matrix for fast curing prepreg applications. It gives room temperature stable, dry and non-tacky prepregs, which can be formed thermoplastically at 70 - 100°C and cured at temperatures between 150 and 180°C.

Properties

General

Property	Value	Comment
Density	1.13 g/cm³	OECD 109 (neat resin)

Mechanical

Property	Value	Comment
Elastic modulus	3.4 GPa	DIN EN ISO 527-2 (neat resin)
Elongation	2.3 %	DIN EN ISO 527-2 (neat resin)
Flexural modulus	3.3 GPa	DIN EN ISO 178 (neat resin)
Flexural strain	3.6 %	DIN EN ISO 178 (neat resin)
Flexural strength	115.0 MPa	DIN EN ISO 178 (neat resin)
Interlaminar shear strength	80 MPa	DIN EN ISO 14130 (Laminate)
	90 MPa	DIN EN ISO 14130 (Laminate)
Plane-Strain Fracture Toughnes	1.7 MPa·√m	ASTM D 5045-99
Poisson's ratio	0.34 [-]	DIN EN ISO 527-1 (neat resin)
Tensile strength	85.0 MPa	DIN EN ISO 527-2 (neat resin)

Thermal

Property	Value	Comment
Coefficient of thermal expansion	0.00006 1/K	20 to 130°C
Exothermic Peak	166 °C	DSC [10K/min] (After prepreg step)
	168 °C	DSC [10K/min] (After prepreg step)
Gel time	350 sec	Geltimer (Plate) at 140°C
	450 sec	Geltimer (Plate) at 140°C
Glass transition temperature	140.0 °C	DIN EN ISO 11357-2 (neat resin)

Rheological Properties

Property	Value	Comment
Shrinkage	0.9 %	pVT Method (neat resin)
Viscosity	0.2 Pa·s	ISO 3219 \| OECD 114 (neat resin)
	4 Pa·s	ISO 3219 \| OECD 114 (neat resin)

Technological properties

Property
Application areas	Lower volume and automated production of structural FRP components like leaf springs (PCM - Technology) and autoclave applications, exterior or interior surface applications. Curing speed can be adapted by catalyst.
Color	0 - 1.5 Gardner according to DIN EN ISO 4630

Property

Application areas

Lower volume and automated production of structural FRP components like leaf springs (PCM - Technology) and autoclave applications, exterior or interior surface applications. Curing speed can be adapted by catalyst.

Color

0 - 1.5 Gardner according to DIN EN ISO 4630

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