Applications: Marine/Pool/Spa
Resins
All CoREZYN® vinyl esters are outstanding choices for marine applications such as boat hulls, swimming pools and spa composites, plus molds and tooling. These resins have excellent physical characteristics, including high fatigue resistance. Whether gel-coated or acrylic-faced, our vinyl esters dramatically improve the blister resistance of a marine laminate, spa or pool.
The CoREZYN VE8110 and VE8121LH Series are selected most frequently for marine applications.
Low VOC Resins
The CoREZYN CORVE8121LH low HAP vinyl ester resins meet or exceed all U.S. standards for blister and fatigue resistance while meeting the newest EPA standards.
These low HAP, 100% vinyl ester thermoset resins are promoted, thixotropic, and feature excellent physical properties. They also have fast Barcol development, which is very convenient for the spray-up and hand lay-up techniques used in boat, pool and spa manufacturing. Peak exotherm can be reached in as little as 15 minutes; gel times for the series range from 15 to 40 minutes.
The resins contain a maximum of 35% styrene (HAP) by weight. That level meets the EPA 40 CFR Part 63 requirements of the National Emission Standards for Hazardous Air Pollutants (HAP) for Boat Manufacturing. This product line also meets the current Volatile Organic Compound (VOC) requirements of California's Southern California's South Coast Air Quality Management District's (SCAQMD) Rule 1162 for "High Strength Resin".
The vinyl ester used in the low HAP series is part of the same resin formula evaluated in the Interplastic Corporation 15-year immersion study. Laboratory analysis concluded that after 15 years of immersion in water at ambient temperatures, laminate panels constructed with 100% CoREZYN vinyl ester resin or a vinyl ester skin coat showed no signs of blistering. The CoREZYN vinyl ester resin created a barrier impervious to water and therefore prevented osmotic blistering. An additional year of study concluded that these same panels retained their original physical properties as well. Flexural strength, flexural modulus and Izod impact strength were measured. Visit literature/technical papers to download a PDF of these award winning studies or to order copies.
As a boat, pool or spa manufacturer, this resin series is a welcome tool in the struggle to meet environmental regulations while retaining the integrity of the laminate's strength and durability.
Modified Vinyl Ester Resins (MVR)
Interplastic also offers tough, low VOC, modified vinyl ester resins (MVR). The CoREZYN MVR8013 LH series and MVR8011 series of resins are designed for marine, tooling and general composite applications. They features excellent physical characteristics, surface quality and blister resistance. These resin series also give you the toughness and strength of traditional vinyl esters plus compliance with current EPA regulations.
Numerous marine composite manufacturers use the vacuum infusion process (VIP) to construct bulkheads, hulls and other laminates. The CORVEX169-826 is a promoted, low viscosity vinyl ester, designed especially for vacuum infusion process. Det Norske Veritas (DNV) certified the resin and the CoREZYN C-1037-NCU clear iso/NPG® gel coat for this process. DNV is a certifying organization similar to Lloyds of London.
Marine Laminating Resins
CoREZYN isophthalics are known for their high temperature, durability and strength characteristics. We also have a line of isophthalics and MVRs designed specifically for personal watercraft. Durability, strength, light weight, good surface quality and cost effectiveness are properties designed into these polymers.
The COR61-AA-340 Series DCPD laminating resins are MACT and SCAQMD-compliant. They are designed to meet the strict performance requirements of the marine industry. These resins are extensively used behind vinyl ester barrier gel coats for structural and above-the-waterline applications.
Tooling
Interplastic has formulated the CorTooling™ System for the marine toolmaker. COR70-BA-760 is designed for quickly building superior marine molds. In addition to the CorTooling System an extensive formulary of tooling resins and gel coats are available.
Gel Coats
Our Gel Coat and Colorant Group offers iso/NPG®, isophthalic, low VOC, vinyl ester, vinyl ester barrier, and general-purpose gel coat systems to protect and beautify your marine FRP parts. Also available are sanding primer gel coats for manufacturers who post-finish their fiberglass parts. Many of these gel coats are CSA-approved.
Our B-853BV-LMM black vinyl ester gel coat provides a superior osmotic barrier and is sprayed on after the gel coat. It can also be sprayed "wet on wet" before the gel coat has fully cured which ensures better bonding between the gel coat and the barrier coat. It also has very good tensile elongation, impact resistance and provides excellent resistance to chemical attack and cracking. These characteristics can extend product life. Many customers have found that the barrier gel coat acts as an excellent print barrier to improve part cosmetics.
Interplastic's low VOC gel coats deliver outstanding product performance and compliance with Southern California's South Coast Air Quality Management District's Rule 1162 and ANSI Z-124.3 sanitary ware tests. Our low VOC, pigmented gel coats have a 25 - 33% decrease in styrene levels over typical pigmented gel coats and have a weight loss below 60 grams per square meter. This satisfies two points of compliance with Rule 1162; only one is required. The low VOC gel coat product line and our other gel coats are available in a full array of colors.
Colorants
C Series polyester-based colorants are made with the highest quality pigments and are formulated for use with polyester resin systems. These smooth pigment pastes quickly blend and distribute evenly when stirred into the liquid resin. Opacity is obtained at various colorant levels, depending on the part's thickness and color. All CoREZYN standard colorants are formulated without heavy metal pigments.
Putties
CoREZYN polyester bonding putties are compounded in several resin bases to meet specific requirements. They are formulated to form contours, to reinforce marine parts and for inter-laminate bonding. The putties offer excellent adhesion and shear strength.
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