NOROX ? SHP-90 is a clear to pale yellow liquid based on a peroxide formulation of acetylacetone peroxide and peroxy esters. It is a very effective polymerization initiator for room and high temperature curing of unsaturated polyester resins.

Technical data

• Active oxygen: 4.4 min.
• Form: Liquid
• Color (APHA): 100 max
• Specific gravity (25°C): 1.06 - 1.10
• Viscosity: 31 - 36 cps
• Flash Point (SETA C.C.): >148°F/64°C, min.
• SADT: >140°F (60°C)
• Soluble in: Oxygenated organic solvents
• Slightly soluble in: water
• Storage temperature: <77°F (25°C) maximum

appliance NOROX ? SHP-90 in combination with cobalt accelerated resins has been shown to be an excellent curing system for unsaturated polyesters at both room and elevated temperatures. The cobalt content (naphthoic or octanoic acid in 11 TP3T solution) should be in the range of 0.11 TP3T to 1.01 TP3T. The advantages of NOROX ? SHP-90 over MEKP initiators are that you get a more complete cure, less residual styrene and stronger parts. Compared to standard AAPs, you get a similar gelling time, slightly higher peak exotherm, but better final cure.Typical applications for NOROX? SHP-40 include manufacturing processes such as RTM, fiber winding, centrifugal casting and continuous lamination.

Packaging, transportation and supply

• NOROX ? SHP-90 is available in standard package sizes of 4x8 lb and 44 lb (20 kg) polyethylene bottles.
• NOROX ? SHP-90 can be supplied pre-stained in 44 lb (20 kg) bottles. See TDS for United Initiators, Inc. Peroxide Dye Concentrates.
• Classification - Refer to sections 14 and 15 of the specific NOROX ? SHP-90 Safety Data Sheet (SDS) for transportation and regulatory information.

NOTE: NOROX ? SHP-90 is available through a worldwide network. contact United Initiators, Inc. for the name of the distributor in your area.

statement denying or limiting responsibility The information provided and all further technical advice - whether verbal, written or experimental - are based on our existing knowledge of in-house testing of local raw materials and are intended to inform interested parties about our products and their possible applications. They should not be interpreted as a guarantee of the performance of a particular product or its suitability for a particular application. Furthermore, this information does not contain complete instructions for use. Nor does it constitute a guarantee of quality and durability. Changes are reserved due to technological advances and company developments. Any existing third-party copyrights should be taken into account. Applications and uses of our products in accordance with our application-specific recommendations are beyond our control and are entirely the responsibility of the user. The user is not relieved of the obligation to verify the suitability and fitness of the purchased goods for the intended purpose.