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Low-Viscosity, Low-Styrene, High-Filler Loading Casting Resins Introduced by Reichhold

Published on 2007-04-03. Author : SpecialChem

Research Triangle Park, NC -- Reichhold has introduced POLYLITE® 32245, a new line of low-viscosity, low-styrene (less than 35%) casting resins for engineered marble applications. It is a resilient, medium reactivity resin line which allows higher filler loadings than conventional casting resins. POLYLITE 32245 resins are formulated for use with lightweight fillers and carbonates. The hybrid chemistry of these resins exhibits low color in cast parts.

POLYLITE 32245 was developed for use as a matrix resin in casting integral bowl vanities, wall panels, shower pans and bathtubs (when using marble quality carbonate, trihydrate and lightweight type fillers). These hybrid unsaturated polyester resins are pre-promoted for room temperature cure using methyl ethyl ketone peroxide (MEKP). They can be used in conjunction with hand mix or automated dispensing equipment.

POLYLITE 32245 resins are recommended for use in conjunction with Reichhold's POLYLITE ES2 decorative coating for cultured marble applications.

Lower Viscosity Allows Cost Reductions

POLYLITE 32245 series resins were developed to provide a versatile, low-viscosity and low-styrene alternative to orthophthalic-based resins. The inherent low viscosity of the 32245 series permits higher filler loadings to reduce part material costs. Utilizing lightweight fillers can reduce cast part material cost (at equivalent resin cost per pound) and weight. Initial tests have demonstrated 2-3 percent resin savings independent of filler types.

The low viscosity of POLYLITE 32245 also provides excellent wet-out and air release which translates to less chance of air entrapment against the gel coat of cast parts.

The low shrinkage of POLYLITE 32245 resins and low exotherm of parts based on this product results in reduced in-process cracking and warpage.

Meeting Industry Standards

Marble vanities made with the POLYLITE 32245 series can exceed ANSI thermal shock standards when properly mixed, initiated, and cured. Cast parts based on POLYLITE 32245 have passed all tests in accordance with ANSI Z124.3 for engineered marble.

As a low-styrene product (less than 35%), POLYLITE 32245 resins meet requirements of California Rules 50 and 1162 for polyester resins.

About Reichhold

Founded in 1927, Reichhold, with its world headquarters and technology center in Research Triangle Park, North Carolina, USA, is the world's largest manufacturer of unsaturated polyester resins and a leading supplier of coating resins for the industrial, transportation, building and construction, marine, consumer and graphic arts markets. Reichhold has manufacturing operations throughout North America, Latin America, the Middle East and Europe.

Source: Reichhold


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