Polymeric materials with improved environmental durability
Polymer composite materials and methods of preparation are discussed. The composite material may comprise a polyurethane foam and a plurality of inorganic particles dispersed in the polyurethane foam. The composite material may have moisture movement properties, such that (a) a sample of the composite material having a length of 48 inches has a moisture movement of less than 0.15% along the length, and/or (b) a sample having a length of 6 inches has a moisture movement of less than 0.8% along the length, when submerged in 45° C. distilled water for 14 days.
1. A composite material comprising:
a polyurethane foam comprising a polyester polyol with an aromaticity of 30% to 60% and a Mannich polyol with an aromaticity of 5% to 40%; and
a plurality of inorganic particles dispersed in the polyurethane foam,
wherein (a) a sample of the composite material having a length of 48 inches has a moisture movement of less than 0.15% along the length, and/or (b) a sample of the composite material having a length of 6 inches has a moisture movement of less than 0.8% along the length, when the sample is submerged in 45° C. distilled water for 14 days, the moisture movement being the percent difference between a length of the sample before and after submergence in the distilled water.
2. The composite material of claim 1 , wherein the polyurethane foam has a crosslink density from 0.1 mol/g to 1 mol/g.
3. The composite material of claim 1 , wherein the sample of the composite material having a length of 48 inches, and/or the sample having a length of 6 inches, has a water uptake of 1% to 10% when submerged in 45° C. distilled water for 14 days.
4. The composite material of claim 1 , wherein the sample of the composite material having a length of 48 inches has a moisture movement of less than 0.10% along the length, and/or the sample having a length of 6 inches has a moisture movement of less than 0.6% along the length, when submerged in 45° C. distilled water for 14 days.
5. The composite material of claim 1 , wherein the composite material has a density from 10 lb/ft3 to 75 lb/ft3.
6. The composite material of claim 1 , wherein the inorganic particles comprise fly ash.
7. The composite material of claim 1 , wherein the polyurethane foam comprises a silane compound.
8. The composite material of claim 7 , wherein the silane compound has the structure:
wherein:
R1 is isocyanate, amino, epoxy (oxirane rings), or sulfur (thiols), acrylate, vinyl/olefin, anhydride, carboxylic acid, hydroxyl, dipodal, imide, alkoxy, or cyano; and
R2, R3, and R4 are each independently selected from alkoxy, acyloxy, amine, chloride, and aryl groups.
9. The composite material of claim 7 , wherein the silane compound is
10. The composite material of claim 1 , wherein the composite material has a fire resistance that meets the standards of at least Class B according to ASTM E-84.
11. The composite material of claim 10 , wherein the composite material is devoid of a fire retardant.
12. A building material comprising the composite material of claim 1 , wherein the building material is selected from the group of siding materials, cladding, trim, beadboard, building panels, sheets, architectural moldings, sound barriers, thermal barriers, insulation, wall boards, ceiling tiles, ceiling boards, soffits, roofing materials, roof tile shingles, roof cover boards, slate panels, shake panels, cast molded products, moldings, sills, stone, masonry, brick products, posts, signs, guard rails, retaining walls, park benches, tables, slats, corner arches, columns, ceiling tiles, and railroad ties.
13. A composite material comprising:
a polyurethane foam comprising a polyester polyol with an aromaticity of 30% to 60%, a Mannich polyol with an aromaticity of 5% to 40%, and an aminosilane compound or a mercaptosilane compound; and
a plurality of inorganic particles dispersed in the polyurethane foam,
wherein (a) a sample of the composite material having a length of 48 inches has a moisture movement of less than 0.15% along the length, and/or (b) a sample of the composite material having a length of 6 inches has a moisture movement of less than 0.8% along the length, when submerged in 45° C. distilled water for 14 days, the moisture movement being the percent difference between a length of the sample before and after submergence in the distilled water; and
wherein the composite material has a fire resistance that meets the standards of Class A according to ASTM E-84.
14. The composite material of claim 13 , wherein the composite material is devoid of a fire retardant.
15. The composite material of claim 13 , wherein the sample of the composite material having a length of 48 inches, and/or the sample having a length of 6 inches, has a water uptake of 1% to 10% when submerged in 45° C. distilled water for 14 days.
16. The composite material of claim 1 , wherein the polyurethane foam comprises an aminosilane compound or a mercaptosilane compound.