Columns

ADVANCING ADHESIVES: New Adhesive Features Longer Working Time

July 1, 2010
/ Print / Reprints /
ShareMore
/ Text Size+
Crystic Crestomer 1153PA is a pre-accelerated and MEKP-cured structural adhesive.

Crystic Crestomer 1152PA is used to bond the hull bulkheads in the Schat-Harding FF1200 lifeboat. (Photo courtesy of Umoe Schat-Harding Equipment AS.)


The Crystic® Crestomer® range of high-performance urethane acrylate structural adhesives from Scott Bader Composites has recently been extended to include a new grade for longer working times. The new product, Crystic Crestomer 1153PA, is pre-accelerated and methyl ethyl ketone peroxide (MEKP)-cured (2% w/v), and can be supplied in 25-kg (55-lb) and 200-kg  (441-lb) containers. Crestomer structural adhesives are used by major marine craft manufacturers in Europe, the Middle East, South Africa, the U.S. and China.

Crystic Crestomer 1153PA is aimed at composite manufacturers of larger fiber glass-reinforced panel (FRP) structures, typically with dimensions of over 25 m (82 ft), that would benefit from a longer adhesive open working time (up to 90 minutes) during production. The longer working time is also of benefit to fabricators operating in high local daytime ambient temperatures (above 25°C/77°F). Customers in high-temperature climates can use the longer open time Crestomer 1153PA during the hottest months and switch to Crestomer 1152PA during the cooler times of the year.

As with all products in the Crestomer range, this new addition was also submitted to Lloyds Register for testing. Crestomer 1153PA successfully gained Lloyds Acceptance (Statement of Acceptance MATS/1785/3), which covers structural adhesives for use in critical FRP bonding applications. Crestomer 1153PA has excellent adhesion to FRP materials; typical FRP-to-FRP lap shear bond joint strengths of 10 MPa have been recorded under BS ISO 4587:2003, with the limiting factor being failure of the substrate, not the adhesive.

This performance was demonstrated in 2009 when Schat-Harding, a leading lifeboat and evacuation system supplier for the offshore, cruise, and shipping industries, set a new 55-m (180-ft) freefall drop world record for a lifeboat with its FF1200 model. The hull bulkheads of the lifeboat’s highly engineered, fiber-reinforced and sandwich composite design were bonded using Crestomer 1152PA. Despite its “all up” weight of 30 metric tons, the FF1200 lifeboat surfaced after having plunged 11 m (36 ft) under the water without suffering any external or internal damage. In addition, the FF1200 was the first vessel to meet all of the new Norwegian Oil Industry Association (OLF) design criteria for lifeboats in the Norwegian offshore sector, which is generally regarded as the most stringent offshore safety standard.

Scott Bader’s R&D team developed Crestomer 1153PA by modifying the long-established Crestomer 1152PA grade, which is specified for a variety of demanding hull and deck structural bonding marine applications. Also MEKP-cured, the 1152PA grade differs from 1153PA only in having a shorter open working time (50 minutes). Both Crestomer grades have the same rheology, which offers an adhesive that can be easily applied either manually or with suitable dispensing equipment.





About Scott Bader

Established in 1921, Scott Bader is a multinational chemical company that employs 560 people worldwide. It is a common trusteeship company with a strong commitment to supporting its customers, workforce and the environment.


For more information, call (44) 1933-663100, e-mail composites@scottbader.com. or visit www.scottbader.com.  


Did you enjoy this article? Click here to subscribe to Adhesives & Sealants Industry Magazine.

You must login or register in order to post a comment.

Multimedia

Videos

Image Galleries

ASI April 2014 Photo Gallery

Our April 2014 issue is now available!

Podcasts

ExxonMobil Tackifier Expansion

Dwight Tozer, vice president of ExxonMobil’s Adhesion Industry business, discusses the company’s latest tackifier expansion project with Editor-in-Chief Susan Sutton.

More Podcasts

Adhesives & Sealants Industry Magazine

ASI Sept 2014 cover

2014 September

Our September issue features articles focusing on high-tech applications and raw materials, as well as a preview of the ASC Fall Convention and Expo. Check it out today!

Table Of Contents Subscribe

THE ADHESIVES STORE

handbook-sealant-tech.gif
Handbook of Sealant Technology

The Handbook of Sealant Technology provides an in-depth examination of sealants, reviewing their historical developments and fundamentals, adhesion theories and properties, and today’s wide range of applications.

More Products

ASI 2014 Buyers GuideASI's Buyers' Guide

Annual purchasing resource for equipment used in the manufacture/formulation of adhesives, sealants, pressure sensitives, tapes and labels and for application of finished adhesives. 

Clear Seas Research

With access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.

STAY CONNECTED

facebook_40px twitter_40  youtube_40pxlinkedin_40 google+ icon ASI 30px