Low gloss 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) polyolefin elastomer;

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

(d) hindered amine light stabilizer, and

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.

2. The compound of claim 1 , wherein the compound further optionally comprises (e) weathering agents comprising ultra-violet light absorber, and anti-oxidant; wherein (a) polyethylene is divided between pellets and flakes in a division ranging from about 80:20 to about 50:50 pellets:flake, wherein (b) hindered amine light stabilizer is butanedioic acid, dimethyl ester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol; 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) Polyolefin elastomer: 5-20

(iv) Silica Gloss Inhibiting Agent: 1-4

(v) Barium Sulfate Gloss Inhibiting Agent: 1-3

(vi) Ultra-violet Light Absorber: 0-0.3

(vii) Hindered Amine Light Stabilizer: 0.1-0.5

(viii) Anti-Oxidant: 0.1-0.3.

3. The compound of claim 1 , wherein the compound further optionally comprises (e) weathering agents comprising ultra-violet light absorber, and anti-oxidant; wherein (b) hindered amine light stabilizer is butanedioic acid, dimethyl ester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol; and wherein the compound is a masterbatch and has ingredients in the range of weight percents of the masterbatch, based on a 20% usage level in a final low gloss capstock compound:

(i) Polyethylene (pellet form): 0-15

(ii) Polyethylene (flake form): 15-40

(iii) Polyolefin elastomer: 35-75

(iv) Silica Gloss Inhibiting Agent: 5-15

(v) Barium Sulfate Gloss Inhibiting Agent: 4-14

(vi) Ultra-violet Light Absorber: 0.25-3

(vii) Hindered Amine Light Stabilizer: 0.5-5

(viii) Anti-Oxidant: 0.1-3.

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;

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;

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/cm 3 .

9. The compound of claim 1 , wherein the polyolefin elastomer is ethylene-octene copolymer.

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. The compound of claim 1 extruded into the form of a capstock simulating the appearance of natural wood.

13. The capstock of claim 12 , wherein the compound further comprises (e) 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 no noticeable stress whitening and less than 1 Delta E CIELAB color change.

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