Latex modified asphalt foams

A composition comprising from about 30 to about 70 percent by weight of solids comprising on a dry weight basis from about 60 to about 99 parts by dry weight of an emulsion of a polymer selected from the group:

• (a) homo- or copolymer of one or more C.sub.4-6 conjugated diolefins which may be unsubstituted or substituted by a C.sub.1-4 alkyl radical or a chlorine or bromine atom;
• (b) a copolymer of:
• from about 25 to 80 weight percent of a C.sub.4-6 conjugated diolefin which may be unsubstituted or substituted by a C.sub.1-4 alkyl radical or a chlorine or bromine atom;
• from about 20 to 75 weight percent of a mixture comprising 75 to 100 weight percent of a C.sub.8-12 vinyl aromatic monomer which may be unsubstituted or substituted by a C.sub.1-4 alkyl radical or a chlorine or bromine atom and from 0 to 25 weight percent of one or more of a C.sub.3-6 alkenyl nitrile, and from 0 up to about 15 weight percent of one or more monomers selected from the group consisting of:
• (i) C.sub.3-6 ethylenically unsaturated carboxylic acids;
• (ii) amides of C.sub.3-6 ethylenically unsaturated carboxylic acids, which amides may be unsubstituted or substituted by up to two C.sub.1-4 alkyl or alkanol radicals;
• (iii) C.sub.1-4 alkyl or alkanol esters of C.sub.3-6 ethylenically unsaturated carboxylic acids;
• (iv) C.sub.3-6 ethylenically unsaturated aldehydes;
• (v) and a mixture thereof;
• (c) a copolymer of from about 0.5 to about 20 weight percent of a C.sub.2-4 olefin;
• and from about 99.5 to about 80 weight percent of a monomer selected from the group C.sub.1-8 alkyl or alkanol esters of C.sub.3-6 ethylenically unsaturated carboxylic acids;
• C.sub.2-8 alkenyl or alkanol esters of C.sub.1-8 ethylenically saturated carboxylic acids;
• (d) a copolymer of from about 60 to about 99.5 weight percent of a C.sub.1-4 alkyl or alkanol ester of a C.sub.3-6 ethylenically unsaturated carboxylic acid;
• and from about 0.5 to 40 weight percent of one or more monomers selected from the group consisting of:
• (i) C.sub.3-6 ethylenically unsaturated carboxylic acids;
• (ii) amides of C.sub.3-6 ethylenically unsaturated carboxylic acids, which amides may be unsubstituted by up to two C.sub.1-4 alkyl or alkanol radicals;
• (iii) C.sub.3-6 ethylenically unsaturated aldehydes,
• (iv) or a mixture thereof;
• from about 1 to about 40 parts by dry weight of an emulsion compatible with said emulsion of polymer, of a member selected from the group asphalt, bitumen, tar and a mixture thereof;
• per 100 parts by dry weight of said emulsion of up to 350 parts by dry weight of a particulate mineral filler and a stabilizer of from 0.5 to 1.5 parts by weight of a pyrophosphate and from 0.5 to 1.5 parts by weight of a salt of a long chain fatty acid.