Novel lightweight asbestos containing cementitious material and process for producing the same

Claim 2

A product as defined in claim 1 wherein said fibers are present at least in a ratio of 10-20 parts for 100 parts cementitious material.

Claim 3

A product as defined in claim 3 wherein said ratio is 30-40 parts.

Claim 4

A product as defined in claim 1 wherein said fibers are present at least in a ratio of 2.25-4.5 parts for 100 parts cementitious material.

Claim 5

A product as defined in claim 1 wherein said ratio is 3-6 parts.

Claim 6

A product as defined in claim 1, wherein said fibers are present in a ratio of 2.25 parts to 40 parts for 100 parts cementitious material.

Claim 7

A product as defined in claim 7 wherein said fibers are present in a ratio of 3 to 6 parts for 100 parts cementitious material and the product obtained has a density in the higher part of the range.

Claim 8

A product as defined in claim 7 wherein said fibers are present in a ratio of 30 to 40 parts for 100 parts cementitious material and the product obtained has a density in the lower part of the range.

Claim 9

A product as defined in claim 1, said product being cellular.

Claim 10

A product as defined in claim 10 which also includes a sequestering agent selected from the group consisting of water soluble salts of hexametaphosphate, ethylenediamine tetraacetic acid, tripolyphosphate and nitrilotriacetic acid.

Claim 11

A product as defined in claim 10 which also includes a nonionic or amphoteric surface active agent resistant to alkalinity and saponification.

Claim 12

A product as defined in claim 10 which also includes a colloidal dispersion.

Claim 13

A product as defined in claim 13 wherein said colloidal dispersion is silica sol or a resin latex.

Claim 14

A product as defined in claim 13 wherein said colloidal dispersion includes a resin latex of the vinyl-acrylic type.

Claim 15

A product as defined in claim 1 wherein said surface active agent is selected from the class consisting of sulfonated aromatic hydrocarbons ethoxylated alkyl phenols, sulfated ethoxylated alkyl phenols, phosphate surface active agents, alcohol sulfates, naphthalene sulfates, ethoxylated alcohol sulfates and taurates.

Claim 16

A product as defined in claim 16 wherein said surface active agent is an alkyl sulfonate, a sulfonate of naphthalene or alkyl naphthalene, or a dodecyl or tridecyl benzene sulfonate.

Claim 17

A product as defined in claim 1 wherein said cementitious material further comprises at least one of diatomaceous earth, silica flour and quicklime.

Claim 18

A product as defined in claim 1 wherein said cementitious material also includes ciment fondu.

Claim 19

A product as defined in claim 19 wherein said cementitious material further comprises at least one of diatomaceous earth and silica flour.

Claim 20

A product as defined in claim 16, also including an auxiliary anionic surface active agent selected from the group consisting of diphenyl sulfonates, ethoxylate alcohols, sarcosine derivatives.

Claim 21

A product as defined in claim 12 wherein said surface active agent is selected from the group consisting of betaine derivatives, imidazoline-type products, alkanolamides, ethoxylated alcohols, fatty esters, oils, fatty acids, amines, amides and alkyl phenols, glycol esters, lanolin, sorbitan derivatives, thio derivatives, mercapto derivatives, monoglycerides and derivatives, tert-amine oxides.

Claim 22

A process for producing a lightweight cementitious product which comprises mixing water, a cementitious material comprising Portland cement, asbestos fiber and at least 5 percent by weight of said fiber of an anionic surface active agent capable of chemically opening the fiber and resistant to alkalinity and saponification, said mixture having a ratio of cementitious material to water of from about 1:1 1/2 to about 1:15, said fiber being present in a ratio of at least 0.8 - 1.6 parts per 100 parts of water, and curing said mixture.

Claim 23

A process for producing a lightweight rigid cellular, cementitious product which comprises mixing water, a cementitious material comprising Portland cement, asbestos fiber and at least 5 percent by weight of said fiber of an anionic surface active agent capable of chemically opening the fiber and resistant to alkalinity and saponification, said mixture having a ratio of cementitious material to water of from about 1:1 1/2 to about 1: 15, said fiber being present in a ratio of at least 0.8 - 1.6 parts per 100 parts of water, causing aeration to take place, and curing said mixture.