Flame retardants
First Claim
Patent Images
1. A flame retardant comprising:
- rice husk comprising silica and lignin, wherein the rice husk is micronized to an effective size, wherein the effective size of the rice husk is about 1 μ
m to about 750 μ
m,and wherein the lignin and the silica are chemically modified, wherein;
lignin chemical modification comprises the addition of a moiety selected from the group consisting of chlorine, iodine, fluorine, phosphoric acid esters, sulfhydryl groups, sulfate groups, organic carbonate, and inorganic carbonate, and silica chemical modification comprises the addition of a functional group selected from the group consisting of an amine group, a hydroxyl group, a silane, isocyanate, vinyl, siloxane, thiol, sulfate, phosphine, and phosphate.
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Abstract
Methods and compositions pertaining to flame retardants using micronized rice husks are disclosed.
11 Citations
16 Claims
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1. A flame retardant comprising:
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rice husk comprising silica and lignin, wherein the rice husk is micronized to an effective size, wherein the effective size of the rice husk is about 1 μ
m to about 750 μ
m,and wherein the lignin and the silica are chemically modified, wherein; lignin chemical modification comprises the addition of a moiety selected from the group consisting of chlorine, iodine, fluorine, phosphoric acid esters, sulfhydryl groups, sulfate groups, organic carbonate, and inorganic carbonate, and silica chemical modification comprises the addition of a functional group selected from the group consisting of an amine group, a hydroxyl group, a silane, isocyanate, vinyl, siloxane, thiol, sulfate, phosphine, and phosphate. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A flame retardant comprising:
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chemically modified rice husk, wherein the chemically modified rice husk includes; silica, wherein the silica has been chemically modified with the addition of a functional group selected from the group consisting of; an amine group; a hydroxyl group; a silane; isocyanate; vinyl; siloxane; thiol; sulfate; phosphine; and phosphate; and lignin, wherein the lignin has been chemically modified with the addition of a moiety selected from the group consisting of; chlorine; iodine; fluorine; phosphoric acid esters; sulfhydryl groups; sulfate groups; organic carbonate; and inorganic carbonate; and wherein the chemically modified rice husk is micronized to an effective size, wherein the effective size of the chemically moditfied rice husk is between 10 μ
m to about 750 μ
m. - View Dependent Claims (8, 9, 10, 11)
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12. A flame retardant comprising:
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chemically modified rice husk, wherein the chemically modified rice husk includes; silica, wherein the silica has been chemically modified by reaction with 3-hydroxypropyltrimethoxysilane; and lignin, wherein the lignin has been chemically modified by the addition of a moiety selected from the group consisting of phosphoric acid esters, sulfhydryl groups, sulfate groups, organic carbonate, and inorganic carbonate, wherein the chemically modified rice husk is micronized to an effective size and wherein the effective size of the chemically modified rice husk is about 1 μ
m to about 750 μ
m. - View Dependent Claims (13, 14, 15, 16)
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Specification