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Used alone or compounded with other resins, DuPont™ Elvaloy® copolymers add performance in areas such as flexibility, toughness, weatherability and “soft touch.”

Included in this document:

The following is provided as a starting point formulation for a PVC wire coating compound modified with Elvaloy®, a permanent flexibilizer that resists migration. Elvaloy® has been shown to improve low-temperature flexibility, strength and elongation. It also has shown improved chemical resistance versus liquid plasticizers.

Starter Formulation with Elvaloy® for Wire and Cable PVC

Formulation PHR %
PVC (Geon 30) 100 28.2
ESO (Drapex 6.8) 5 1.4
Stabilizer BaZn (Mark 6731) 5 1.4
DIDP 40 11.3
ATH (Hydral 710) 45 12.7
Calcium Carbonate (Atomite Whiting) 75 21.2
Elvaloy® HP441 80 22.6
Antioxident (Irganox 1010) 0.8 0.23
Antioxident (DLTDP) 0.32 0.09
TiPure® R960 3 0.85

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Physical Properties of Elvaloy® Starter Formulation PVC Compound

Properties ASTM Test Method Results
Brittlepoint, °C D746 -36
Tensile, psi D638 1014
Elongation, % D639 362
Dielectric Strength in oil, volts/mi D149 533
Dielectric Constant @ 1KHz D150 5.84
Dissipation Factor @ 1KHz D150 0.060
Dielectric Constant @ 1MHz D150 4.03
Dissipation Factor @ 1MHz D150 0.072
Volume Resistivity, ohm-cm D257 1.65 x 1012

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Formulating to Adjust Properties While Maintaining Hardness

At constant hardness, Elvaloy® HP gives your compound:

  • A lower brittle point,
  • Higher tensile strength, and
  • More elongation.

And if you want to increase the alumina trihydrate (ATH) for improved limiting oxygen index (LOI), you still maintain the improved properties. At constant tensile strength, you gain elongation; at constant elongation, you gain tensile strength, using Elvaloy® HP versus triisononyl trimellitate (TINTM).


Constant Hardness Increased ATH
Ingredients, phr* Formulation 1 Formulation 2 Formulation 1 Formulation 2
Elvaloy® HP441 50 0 50 0
TINTM 0 40 0 40
ATH 60 60 100 100
Properties



Hardness, Shore A
(ASTM D2240)
96.0 96.0 96.5 96.5
Brittle Point, °C (ASTM D1790) -28.7 -7.7 -25.8 -4.8
Apparent Modulus of Rigidity
at 0°C, psi (ASTM D1043)
49,389 21,788 191,338 132,039
Tensile, psi (ASTM D638) 3,065 2,679 2,785 2,400
Elongation, % (ASTM D638) 279 218 262 202
LOI, % (ASTM D2863) 30 30 33 34

* phr = parts per hundred resin based on 100 parts of PVC

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Formulating to Adjust Properties While Maintaining Rigidity

At constant rigidity, Elvaloy® HP Gives your compound:

  • A lower brittle point and
  • More elongation, but
  • Lower tensile strength and
  • Lower LOI.

Constant Rigidity
Ingredients, phr* Formulation I Formulation II
Elvaloy® HP441 70 0
TINTM 0 24
ATH 50 50
Properties

Hardness, Shore A
(ASTM D2240)
90.8 96.5
Brittle Point, °C
(ASTM D1790)
-29.6 -4.2
Apparent Modulus of Rigidity at 0°C, psi
(ASTM D1043)
120,532 120,317
Tensile, psi
(ASTM D638)
3,272 3,634
Elongation, %
(ASTM D638)
299 184
LOI, %
(ASTM D2368)
31 34

* phr = parts per hundred resin based on 100 parts of PVC

 

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Formulating to Adjust Properties While Maintaining a Low Brittle Point

If you want to maintain a low brittle point, Elvaloy® HP gives you design flexibility to bring the other properties in line with your requirements.


Constant Brittle Point
Ingredients, phr* Formulation 1 Formulation 2 Formulation 3 Formulation 4
Elvaloy® HP441 8 0 54 45
TINTM 0 45 0 40
ATH 20 20 100 85
Properties



Hardness, Shore A
(ASTM D2240)
98.4 93.6 93.2 94.2
Brittle Point, °C (ASTM D1790) -12.0 -12.0 -12.0 -12.0
Apparent Modulus of Rigidity
at 0°C, psi (ASTM D1043)
144,054 34,097 187,989 179,935
Tensile, psi (ASTM D638) 4,607 3,097 3,170 3,447
Elongation, % (ASTM D638) 177 221 250 236
LOI, % (ASTM D2863) 35 29 37 36

* phr = parts per hundred resin based on 100 parts of PVC

Because DuPont cannot anticipate or control the many different conditions under which this information and/or product may be used, it does not guarantee the applicability or the accuracy of this information or the suitability of its products in any given situation. Users of DuPont products should make their own tests to determine the suitability of each such product for their particular purposes. The data listed herein falls within the normal range of product properties but they should not be used to establish specification limits or used alone as the basis of design.

Disclosure of this information is not a license to operate or a recommendation to infringe a patent of DuPont or others.