Andur® BD 78 AP

About
Polymer Characteristics: Elastomers based on Andur® BD 78 AP show excellent resistance to aqueous environments even at high temperatures up to 100C. They also show excellent resistance to aqueous acids, bases and bleach. This will enable Andur® BD 78 AP elastomers to be put in applications where other conventional polyurethane elastomers cannot go. Andur® BD 78 AP is not compatible with Curene® 442 (MBOCA).&&

About

Polymer Characteristics: Elastomers based on Andur® BD 78 AP show excellent resistance to aqueous environments even at high temperatures up to 100C. They also show excellent resistance to aqueous acids, bases and bleach. This will enable Andur® BD 78 AP elastomers to be put in applications where other conventional polyurethane elastomers cannot go. Andur® BD 78 AP is not compatible with Curene® 442 (MBOCA).&&

Product Description
Generic	PUR+TDI
Material Status	Commercial: Active
Features	Alkali resistant,Acidproof
Availabilitys	North America

Technical Data
PHYSICAL	Nominal value	Unit	Test method
Density	0.940	g/cm³
100℃	0.884	g/cm³
Water absorption rate
balance	0.19	%

elastic body	Nominal value	Unit	Test method
tensile strength
fracture	15.9	MPa
100% strain	6.76	MPa
300% strain	11.9	MPa
Tensile strain
fracture	430	%
tear strength
—	37.7	kN/m	ASTM D624
cracking	7.5	kN/m	ASTM D470
cracking	7.9	kN/m	ASTM D1938
Compression deformation
70℃，22 hr	51	%	ASTM D395
Basho’s elasticity	35	%	ASTM D2632

THERMAL	Nominal value	Unit	Test method
Embrittlement temperature	-25.0	℃	DMA
Linear coefficient of thermal expansion
MD	2.0E-4	1/℃

Supplementary information	Nominal value	Unit	Test method
NCO	2.8 to 3.2	%

Uncured Properties	Nominal value	Unit
viscosity
100℃	0.45	Pa·s
70℃	1.9	Pa·s

MECHANICAL	Nominal value	Unit
Shore hardness
Shaw’s A	76 to 80
Tensile modulus	12.0	MPa

Notes
1. Typical properties: these are not to be construed as specifications.
2. Die C
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