Vinyl Exteriors

Residential structure calling out siding, window profiles, fence, deck & railing.

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At Dow Elastomers, we’re constantly innovating around our customers’ needs and unmet needs.  Our renowned technical team will work hand-and-hand with you to start reducing your formulation cost, while upholding your high standards of performance and quality.

Above you’ll find our product list tailored for the rigid vinyl exterior applications.  Contact your Dow Elastomers representative to find-out the latest materials in our portfolio.  And check out our suggested starting point formulations by application. See Product Attributes

TYRIN™ chlorinated polyethylene  (CPE) thermoplastic resins are widely used as impact modifiers in PVC extrusion and injection molding applications.  Applications include siding, window profiles, pipe, fence, deck and railing.  The use of low levels of TYRIN with rigid PVC resins can significantly improve impact resistance.  TYRIN attributes include:

  • Excellent low temperature properties
  • High filler level acceptance
  • Compatibility with a broad range of formulation ingredients
  • Excellent resistance to weathering in a properly formulated compound

ENLITE™ modified polyolefin elastomers  (MPE) thermoplastic resins are used as impact modifiers in rigid PVC compounds and provide excellent performance and economics for outdoor applications.  ENLITE offers the optimum balance of performance and cost compared to acrylic and CPE impact modifiers.

Below are a few starting point formulations for your consideration.  Please note that our formulation knowledge base extends beyond these applications and even beyond Dow products.  Our industry renowned technical team will welcome your toughest formulation challenges.

A table displaying starting point formulations.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Product Attributes

Formulation Cost:

Based on the amount of acrylic modifier used, savings with TYRIN is approximately 3-4% of the total PVC compound cost.  The key is a combination of increased filler acceptance and overall lower modifier price.  Figure 5 depicts the amount of savings possible based on modifier usage.

 A chart showing the formulation cost for modifier useage.

Processability Window:

Dow’s leading-edge technology has demonstrated the effectiveness of using TYRIN™ to create more robust formulations with enhanced processability windows. Contact us to learn more.

Filler Acceptance:

Increasing filler concentration is one route to reducing formulation cost as long as product properties are maintained.

Use of Tyrin™ CPE as impact modifier makes iit possible to use more filler because TYRIN is not crosslinked, flows during extrusion and encapsulates inorganic filler particles.  This “coating” provides two mechanisms which support additional filler loading without reducing impact strength:

  1. CPE performs as a buffer between PVC and filler which keeps the filler particles from acting as critical flaws.

  2. Filler aids in dispersion of the CPE

Impact Resistance:

TYRIN 3615P is well known the industry to provide superior impact performance versus acrylic impact modifiers at very high filler loadings.  This is especially important as customers look to reduce formulation cost while maintaining industry requirement performance specifications.

Impact Test Results using TYRIN™  CPE Resins and acrylic modifiers
Impact test results using TYRIN CPE resins and acrylic modifiers

Ductility:

TYRIN™ CPE is less brittle than acrylic material.  In high-speed cutting/sawing/drilling processes of window (or other) fabrication, TYRIN increases ductility to prevent breaks and shards.  The clean cut edges of the profile offer improved weld performance, and most importantly, less callbacks for you and your customers.

Test showing ductility of TYRIN™ CPE Resins vs acrylic
Showing ductility of TYRIN CPE resins vs acrylic

Weathering:

We recognize that weatherability is important to our customers and as a result, conduct frequent outdoor and accelerated weathering studies. 

TYRIN offers excellent resistance to weathering and impact strength retention in a properly formulated compound, and also offers good chemical resistance, excellent low temperature properties, high filler level acceptance and excellent compatibility with a broad range of formulation ingredients.

The following chart and table shows the results of xenon arc accelerated weathering testing on commercially available white window profiles, which is equivalent to approximately  2 to 3 years of Florida exposure.  The data indicates that the CPE-based compounds weather as well as or better than, the acrylic-based compound.

Xenon Arc Accelerated Weathering
of White Window Profiles

A chart showing the hours of exposure for Xenon Arc Accelerated Weathering.

 


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