Bayflex® XGT-140

Bayflex XGT-140 is an elastomeric polyurethane system used in the reaction injection molding (RIM) process. The system is supplied as two liquid components: Component A is a modified diphenylmethane diisocyanate (MDI), and Component B is a polyether polyol system.

The extended gel time of Bayflex XGT-140 system gives equipment designers the flexibility to create large, complex parts that can be molded on existing injection machinery. The resin 's excellent surface quality and high impact resistance make it a candidate for agricultural equipment, heavy-duty trucks, specialty transportation, and marine applications. As with any product, use of the Bayflex XGT-140 system in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability.

基本信息
特性	抗撞击性，高 优良外观
用途	船舶应用 农业应用
形式	液体
加工方法	反应注射成型 (RIM)

物理性能	额定值	单位制	测试方法
比重		g/cm³	ASTM D792, ASTM D1622
收缩率 - 流动 (3.18 mm)		%	内部方法

硬度	额定值	单位制	测试方法
肖氏硬度 (邵氏 D, 3.18 mm)			ASTM D2240

机械性能	额定值	单位制	测试方法
抗张强度 (断裂, 3.18 mm)		MPa	ASTM D638
伸长率 (断裂, 3.18 mm)		%	ASTM D638
弯曲模量			ASTM D790
-30°C, 3.18 mm		MPa	ASTM D790
23°C, 3.18 mm		MPa	ASTM D790
65°C, 3.18 mm		MPa	ASTM D790

弹性体	额定值	单位制	测试方法
抗张强度 (断裂, 3.18 mm)		MPa	ASTM D412
伸长率 (断裂, 3.18 mm)		%	ASTM D412
撕裂强度 1(3.18 mm)		kN/m	ASTM D624

冲击性能	额定值	单位制	测试方法
悬壁梁缺口冲击强度 (3.18 mm)		J/m	ASTM D256
装有测量仪表的落镖冲击 2			ASTM D3763
-30°C, 3.18 mm		J	ASTM D3763
23°C, 3.18 mm		J	ASTM D3763

热性能	额定值	单位制	测试方法
载荷下热变形温度 (0.45 MPa, 未退火, 3.18 mm)		°C	ASTM D648
线形热膨胀系数 - 流动 (3.18 mm)		cm/cm/°C	ASTM D696

热固性	额定值	单位制	测试方法
热固组件 3
部件 A
部件 B
脱模时间		min

补充信息	额定值	单位制	测试方法
Heat Sag - 4 in Overhang 4(121°C, 3.18 mm)		cm	ASTM D3769
Part A Type: Isocyanate Appearance: Light yellow to yellow liquid Specific Gravity @ 25°C: 1.21 Viscosity @25°C: 700 mPa-s Flash Point PMCC: 213 °C NCO: 22.6 - 23.1 % Part B Type: Polyol Appearance: Viscous liquid Specific Gravity @ 25°C: 1.04 Viscosity @25°C: 550 mPa-s Flash Point PMCC: 110 °C Water: 0.08 wt% Hydroxyl Number: 465 mg KOH/g Molding Parameters Material Temperature: 32 to 38 °C Mold Temperature: 60 to 70 °C Polyol Nucleation - Specific Gravity: 0.75 to 0.80 0 shot time: 11 to 12 sec

备注
1 .	C 模具
2 .	2.24 m/sec
3 .	1.05 Index
4 .	1 hr