Product Description

Butanox® LPT-IN is a methyl ethyl ketone peroxide (MEKP) supplied in diisononyl phthalate, used for curing unsaturated polyester resins in the presence of a cobalt accelerator at room and elevated temperatures. Compared with most other ketone peroxides, Butanox® LPT-IN gives a significantly longer gel time, making it particularly suited to applications where a long gel time or production time is required — such as the production of large parts and filament winding. It also performs well in high-ambient-temperature environments.

Butanox® LPT-IN is especially recommended for curing vinyl ester resins, and this MEKP formulation produces less foaming than standard MEKPs. Its guaranteed low water content and absence of polar compounds make it well suited to GRP products for marine applications. The low hydrogen peroxide content also makes it a good fit for curing gelcoats that are prone to microporosity caused by hydrogen peroxide decomposition.

CAS Number	Total active oxygen
1338-23-4	8.4-8.6%
Appearance	EINECS/ELINCS
Clear and colorless liquid	No.215-661-2
TSCA status
Listed on inventory
Characteristics
Density, 20°C	1.0117 g/cm³
Viscosity, 20°C	32.4 mPa.s
Application
● Curing of unsaturated polyester resins with a cobalt accelerator, room and elevated temperature ● Extra slow-gelling applications requiring extended gel/production time, e.g. large FRP parts ● Filament winding ● Curing of vinyl ester resins ● Marine GRP applications (low water content, no polar compounds) ● Gelcoats prone to microporosity (low hydrogen peroxide content)