Method and composition for coating mat and articles produced therewith

• US 5,102,728 A
• Filed: 02/21/1991
• Issued: 04/07/1992
• Est. Priority Date: 08/17/1990
• Status: Expired due to Term

• Current Assignee: Atlas Roofing Corporation (Hood Cos., Inc.)
• Original Assignee: Atlas Roofing Corporation (Hood Cos., Inc.)
• Inventors: Williams, James L., Williams, James H., Gay, William M., Bush, Philip W., Blanpied, Robert H., Donald, Richard L.
• Primary Examiner(s): VAN BALEN, WILLIAM
• Application Number:
  US07/658,523
• Time in Patent Office: 411 Days
• Field of Search: 428/268, 428/273, 428/283, 428/290, 428/489
• US Class Current: 442/86
• CPC Class Codes: B29C 67/248 Moulding mineral fibres or particles bonded with resin, e.g. for insulating or roofing board articles from wood or lignocellulosic material with binding agents B27N; mineral aggregates bonded with resin B29C67/242; thermal insulation in general F16L59/00
• CPC Class Codes: B29C 70/003 characterised by the matrix material, e.g. material composition or physical properties
• CPC Class Codes: B29K 2309/08 Glass
• CPC Class Codes: Y10T 428/31815 Of bituminous or tarry residue
• CPC Class Codes: Y10T 442/2221 Coating or impregnation is specified as water proof

Abstract

A coating composition and method of producing a non-porous mat includes coating a predominantly glass fiber porous web substrate. The coating comprises an aqueous mixture of a mineral pigment; a first binder material comprised of a polymer latex adhesive material; and, a second binder material comprised of asphalt emulsion material. The total dry weight basis of both binders does not exceed 24% of the total coating.

Claims

1. A method of producing a non-porous mat comprising the coating of a predominantly glass fiber porous web substrate with a coating mixture, said coating mixture comprising an aqueous mixture of:

(1) at least one mineral pigment; and

,

(2) a first binder material comprised of a polymer latex adhesive material; and

,

(3) a second binder material comprised of a water emulsion of asphalt;

and wherein the total dry weight basis of both binders does not exceed 24% of the total coating.

2. The method of claim 1, wherein said mineral pigment is a filler material chosen from the group consisting of clay, mica, talc, limestone (calcium carbonate), gypsum (calcium sulfate), aluminum trihydrate (ATH), antimony oxide, magnesium oxide, bentonite, dolomite, and diatomaceous earth.

3. The method of claim 2, wherein said filler material has a particle size such that at least 95% thereof passes through a 325 mesh wire screen.

4. The method of claim 1, wherein said polymer latex adhesive material is chosen from the group consisting of Styrene-Butadiene-Rubber (SBR), Styrene-Butadiene-Styrene (SBS), Ethylene-Vinyl-Chloride (EVCl), Poly-Vinylidene-Chloride (PVdC), modified Poly-Vinyl-Chloride (PVC), Poly-Vinyl-Alcohol (PVOH), Ethylene- Vinyl-Acetate (EVA), and Poly-Vinyl-Acetate (PVA).

5. The method of claim 1, further comprising:

applying said coating mixture to a first surface of said porous mat whereby said coating mixture penetrates to a second surface of said porous mat; and

,

drying said coating mixture.

6. A mat produced by the method of claim 1.

7. A mat produced by the method of claim 2.

8. A mat produced by the method of claim 3.

9. A mat produced by the method of claim 4.

10. A mat produced by the method of claim 5.

12. The coating mixture of claim 1, wherein said mineral pigment is a filler material chosen from the group consisting of clay, mica, talc, limestone (calcium carbonate), gypsum (calcium sulfate), aluminum trihydrate (ATH), antimony oxide, magnesium oxide, bentonite, dolomite, and diatomaceous earth.

13. The coating mixture of claim 2, wherein said filler material has a particle size such that at least 95% thereof passes through a 325 mesh wire screen.

14. The coating mixture of claim 1, wherein said polymer latex adhesive material is chosen from the group consisting of Styrene-Butadiene-Rubber (SBR), Styrene-Butadiene-Styrene (SBS), Ethylene-Vinyl-Chloride (EVCl), Poly-Vinylidene-Ethylene-Vinyl-Chloride (PVdC), modified Poly-Vinyl-Chloride (PVC), Poly-Vinyl-Alcohol (PVOH), Ethylene- Vinyl-Acetate (EVA), and Poly-Vinyl-Acetate (PVA).

11. A coating mixture for coating a predominantly glass fiber porous web substrate with a coating mixture, said coating mixture comprising an aqueous mixture of:

(1) at least one mineral pigment; and

,

(2) a first binder material comprised of a polymer latex adhesive material; and

,

(3) a second binder material comprised of a water emulsion of asphalt;

and wherein the total dry weight basis of both binders does not exceed 24% of the total coating.