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Achieve Improved Thermal, Weather, Chemical and Corrosion Resistance in a Two-Coat System

Dow Corning® 3055 Resin for High-Performance Paints and Coatings
 
 
Power Up

Create next-generation polysiloxane coatings with a new amine-functional siloxane crosslinking resin from Dow Corning.


Would you like to be able to offer a two-coat system that provides the performance of a three-coat polyurethane coating? Are you looking for a way to improve the durability of your epoxy coatings?

Then consider Dow Corning® 3055 Resin (PDF). This new amine-functional siloxane resin is suitable as a crosslinker for coating applications anywhere that amine functionality is already utilized, including urethane, epoxy, polyester, alkyd, amine and acrylic systems. But it cures by a different mechanism than traditional polysiloxanes, which means
Dow Corning® 3055 Resin can be used to formulate polysiloxane hybrid coatings with improved chemical, thermal, UV, corrosion and moisture resistance compared to epoxy and two-component polyurethane (2K PU) systems.

Advantages of Dow Corning® 3055 Resin

  • Amine functionality provides potential utility in a broad range of chemistries
  • Near-solventless delivery for low-VOC formulating
  • Cure chemistry eliminates mass loss, stress cracking and post-cure drift
  • The silicone structure allows for improved chemical, thermal, UV and moisture performance
  • Improved corrosion resistance compared to two-component polyurethanes, allowing a two-coat (primer/topcoat) system for reduced labor costs and faster return-to-service

Increased Corrosion Resistance Provides Potential Cost and Time Savings

In a salt spray corrosion test, a cycloaliphatic epoxy resin crosslinked with Dow Corning® 3055 Resin performed as well as the epoxy control and better than the polyurethane, which exhibited scribe creep, also known as cathodic disbondment (Figure 1).

Figure 1: Improved corrosion resistance of a cycloaliphatic epoxy combined with
Dow Corning® 3055 Resin.


Scribe Creep (mm)
50% Dow Corning® 3055 Resin
(with organic amine)
55
60% Dow Corning® 3055 Resin
(w/Dow Corning® 3074 Intermediate)
48
70% Dow Corning® 3055 Resin
(w/Dow Corning® 3074 Intermediate) A
37
Epoxy (with organic amine) B57
Two-component polyurethane C67

Improved Corrosion Resistance of a Cycloaliphatic Epoxy Combined with Dow Corning® 3055 Resin

Coated ground cold-rolled steel panels were evaluated using a 1,500 hour salt spray (scribed) test.

Extended Flexibility Means Greater Durability

Polysiloxane hybrid coatings formulated with Dow Corning® 3055 Resin maintain their flexibility because they do not suffer from the post-cure embrittlement common with alkoxy silane-based systems (Figure 2).

Figure 2: Flexibility after weathering.

Flexibility After WeatheringFlexibility After Weathering
After one year of outdoor exposure, the paint formulated with Dow Corning® 3055 Resin (right, 1-inch mandrel bend) retains its flexibility, while the silane-crosslinked coating (left, 4-inch mandrel bend) has become brittle.


Improved Chemical Resistance Demonstrates True Synergy

Siloxanes alone do not possess the same level of chemical resistance as epoxy coatings. However, polysiloxane coatings prepared with Dow Corning® 3055 Resin exhibit superior chemical resistance compared to epoxy coatings prepared using organic amine crosslinkers (Figure 3). The true synergy of Dow Corning® 3055 Resin translates to a higher level of coating performance and durability.

Figure 3. Improved chemical resistance of an epoxy coating formulated with
Dow Corning® 3055 Resin.


>
#
Chemical
1Acetic acid
> (10%)
2Formic acid
> (10%)
3 Hydrochloric acid
> (36%)
4Nitric acid
> (50%)
5 Phosphoric acid
> (50%)
6Sulfuric acid
> (50%)
7 Ammonium hydroxide
> (20%)
8Potassium hydroxide
> (20%)
9Sodium hydroxide
> (20%)
Improved Chemical Resistance of an Epoxy Coating Formulated with Dow Corning® 3055 Resin

Adding Dow Corning® 3055 Resin improves the chemical resistance beyond that of a traditional cycloaliphatic epoxy topcoat. Five drops of chemical were added to each resin sample, and the samples were then covered with a watch glass for 24 hours.

A Variety of Possibilities

Dow Corning® 3055 Resin can be used in a broad array of protective coating applications. In addition, it also offers potential opportunities for performance improvement in applications outside of traditional protective coatings, including fire-resistant and intumescent coatings, composite polymers, industrial adhesives, and high-temperature coatings.


Resources

Dow Corning ® 3055 Resin Product Information Sheet (PDF)
Download the Dow Corning 3055 Resin Sell Sheet
Interactive Additive Selection Guide

 
The Use of Silicone in Coatings Applications The Use of Silicone in Coatings Applications
(VIDEO)
Environmental Impact of Using Silicone Environmental Impact of Using Silicone
(VIDEO)
Silane Based Polysiloxane Vs. The New Dow Corning® 3055 Technology Silane Based Polysiloxane Vs. The New Dow Corning® 3055 Technology
(VIDEO)
Why Amine Technology and What Are the Benefits? Why Amine Technology and What Are the Benefits?
(VIDEO)
Moving from a Three Coat to Two Coat System Moving from a Three Coat to Two Coat System
(VIDEO)
Finding True “Synergy” Finding True “Synergy"
(VIDEO)
Maximizing the Performance Maximizing the Performance
(VIDEO)
Weatherability Performance Weatherability Performance
(VIDEO)
Additional Benefits in Performance Additional Benefits in Performance
(VIDEO)
Chemistry Beyond Protective Coatings Chemistry Beyond Protective Coatings
(VIDEO)
The Dow Corning® 3055 Resin and its utility in the Coatings industry and beyond The Dow Corning® 3055 Resin and its utility in the Coatings industry and beyond
(VIDEO)

Request a sample

To request a sample of
Dow Corning® 3055 Resin,
call our North America
Business Center at
1 866 739 7224 (toll-free)
or send your request directly
to coatings@dowcorning.com.

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