Low gloss ionomer-based capstock

1. A low gloss capstock compound extrudable into the form of a capstock, comprising:

(a) polyethylene in both pellet form and flake form;

(b) metal-based ionomer thermoplastic resin, wherein the metal is selected from the group consisting of magnesium and zinc;

(c) acid scavenger for the metal-based ionomer thermoplastic resin;

(d) gloss inhibiting agents comprising both silica and barium sulfate; and

(e) weathering agents comprising hindered amine light stabilizer, wherein the hindered amine light stabilizer is selected from the group consisting of N,N′,N″,N′″-tetrakis(4,6-bis(butyl-(N-methyl-2,2,6,6-tetramethylpiperidin-4-yl)amino)triazin-2-yl)-4,7-diazadecan-1,10-diamine and Butanedioic acid, dimethyl ester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol,

wherein (a) polyethylene and (b) metal-based ionomer thermoplastic resin have a ratio of about 4:1 to about 8:1 and the polyethylene is at least 75 weight percent of the compound,

wherein, when a surface of a strip of the compound is tested according to ASTM D523, D2457, the surface has a Gloss Angle at 85° of less than 10 GU and less than 2 Delta E CIELAB color change after 2000 hours of QUV weathering.

2. The compound of claim 1 , wherein the compound further optionally comprises both additional weathering agents comprising ultra-violet light absorber and anti-oxidant and (f) colorant;

wherein (a) polyethylene is divided between pellets and flakes in a division ranging from about 80:20 to about 50:50 pellets: flakes, and

wherein the compound has ingredients in the range of weight percents of the compound:

(i)

Polyethylene (pellet form)

45-53

(ii)

Polyethylene (flake form)

28-38

(iii)

Metal-based Ionomer Thermoplastic

 5-25

Resin

(iv)

Acid Scavenger

0.1-0.4

(v)

Silica Gloss Inhibiting Agent

1-5

(vi)

Barium Sulfate Gloss Inhibiting

1-3

Agent

(vii)

Ultra-violet Light Absorber

  0-0.3

(viii)

Hindered Amine Light Stabilizer

0.1-0.5

(ix)

Anti-Oxidant

0.1-0.3

(x)

Colorant

 1-4.

3. The compound of claim 1 , wherein the compound further optionally comprises both additional weathering agents comprising ultra-violet light absorber and anti-oxidant and (f) colorant; and wherein the compound is a masterbatch and has ingredients in the range of weight percents of the masterbatch, based on a 25% usage level in a final low gloss capstock compound:

(i)

Polyethylene (pellet form): 0-15

(ii)

Polyethylene (flake form): 15-40

(iii)

Metal-based Ionomer Thermoplastic Resin: 40-80

(iv)

Acid Scavenger: 1-3

(v)

Silica Gloss Inhibiting Agent: 5-15

(vi)

Barium Sulfate Gloss Inhibiting Agent: 4-14

(vii)

Ultra-violet Light Absorber: 0.25-3

(viii)

Hindered Amine Light Stabilizer: 0.5-5

(ix)

Anti-Oxidant: 0.1-3

(x)

Colorant: 0-35.

4. The compound of claim 2 further comprising colorant.

5. The compound of claim 4 , further comprising other additives selected from the group consisting of biocides; surfactants; intercalated organoclays; anti-static agents; bonding, blowing and foaming agents; dispersants; fillers and extenders; fire and flame retardants and smoke suppressants; fly ash; impact modifiers; initiators; lubricants; micas; plasticizers; processing aids; release agents; silanes, titanates and zirconates; slip and anti-blocking agents; stabilizers; stearates; ultraviolet light absorbers; viscosity regulators; waxes; pest repellants; and combinations of them.

6. The compound of claim 2 ,

wherein the ultra-violet light absorber is 2-(2H-benzotriazol-2-yl)-4,6-ditertpentylphenol; and

wherein the anti-oxidant is a mixture of Tris(2,4-di-tert-butylphenyl)phosphite and Tetrakis[methylene-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]methane in a 50:50 weight ratio.

7. The compound of claim 3 ,

wherein the ultra-violet light absorber is 2-(2H-benzotriazol-2-yl)-4,6-ditertpentylphenol; and

wherein the anti-oxidant is a mixture of Tris(2,4-di-tert-butylphenyl)phosphite and Tetrakis[methylene-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]methane in a 50:50 weight ratio.

8. The compound of claim 1 , wherein each of the two different forms of polyethylene has a melt flow index of 0.2 to 0.8 g/10 min, when measured using ASTM D1238 (2.16 kg at 190° C.), and wherein each of the two different forms of polyethylene has a density of from about 0.93 to about 0.97 g/cm3.

9. The compound of claim 1 , wherein the metal-based ionomer thermoplastic resin is zinc-based ionomer thermoplastic resin, and wherein the acid scavenger is magnesium-aluminum synthetic hydrotalcite.

10. The compound of claim 1 , wherein the silica has a particle size ranging from about 5 to about 12 micrometers, wherein the barium sulfate has a particle size ranging from about 0.5 to about 5 micrometers.

11. The compound of claim 1 , wherein the compound is extruded in the form of a capstock attached or adhered to a substrate.

12. A capstock made from the compound of claim 1 .

13. The capstock of claim 12 , wherein the compound further comprises additional weathering agents comprising ultra-violet light absorber and anti-oxidant; and wherein the capstock has a first surface attached or adhered to a substrate and a second surface exposed to sunlight.

14. The capstock of claim 13 , wherein the second surface has and less than 2 Delta E CIELAB color change after 2000 hours of QUV weathering.

15. The capstock of claim 12 , wherein the substrate is a building or construction item.