Royaltherm® 1721

Chemical Family: Ethylene-Propylene Copolymers (EPR)PolyolefinsSilicones

Royaltherm 1721 a modified EPDM with a special silicone rubber. Royaltherm 1721 is supplied as a base compound that can be vulcanized with peroxides or sulfur/accelerator systems. Royaltherm 1721 is 55 - 65 Durometer when vulcanized with 1.8 phr of dicumyl peroxide. It can be blended with Royaltherm 1411 for intermediate hardness applications. Royaltherm 1721 is recommended for applications that require higher tensile strength than Royaltherm 1411. Royaltherm 1721 is also recommended for applications that require retention of mechanical strength at elevated temperatures, weather and moisture resistance, electrical stability and compression recovery at low temperatures.

Properties

Physical Form: Solid

Product families

Elastomers — Specialty Elastomers

Silicone Elastomers

Elastomers — Thermoset Elastomers

EP Rubbers (EPDM)

Other characteristics

Brand: Royaltherm
Polymer Name: Ethylene Propylene Diene Terpolymer (EPDM), Silicone Elastomer; Ethylene Propylene Diene Terpolymer (EPDM); Silicone Elastomer
Processing Methods: Injection Molding
Color: Off White
Technology: Elastomers
Material Features: Excellent Mechanical Strength
Flex Fatigue Resistant
Good Electrical Properties
Good Tensile Properties
High Tensile Strength
Low Compression Set
Moisture Resistant
Chemical Inventories: AICS (Australia)
DSL (Canada)
IECSC (China)
KECI (Korea)
MITI Listed (Japan)
NDSL (Canada)
PICCS (Phillipines)
TSCA (USA)
Certifications and Compliance: Occupational Safety & Health Administration (OSHA)
Plastics and Elastomers Processing Methods: Injection Molding

Technical data

Table 1 of 2

4 rows

Characteristic	Value	Unit	Method
Elongation	min. 500	%	—
Durometer Hardness	55-65	Shore A	—
Peroxide Cured	Typical	—	ASTM D 412
Tensile Strength	min. 10.0	MPa	—

Table 2 of 2

2 rows

Characteristic	Value	Unit	Method
Mooney Viscosity	50-65	ML/4/100°C	ASTM D 1646
Specific Gravity	1.11-1.17	g/cc.	ASTM D 792/ISO 1183