Fire protection containers incorporating novel low free-water insulation materials
View Patent ↗The present invention contemplates water-bearing silicate materials achieved by modifying the basic method of essentially reacting water glass with calcium chloride to bind the free water into solid form without adversely affecting the basic chemical and physical structure of the original product. The material is then dried by using a physical wicking agent, such as a cellulose sponge, adding an anhydrous salt to the material to form a crystalline hydrate, or adding calcium oxide or calcium hydroxide to the material to form a microstructure that physically retains the water. The material is then incorporated into a fire protection container in which the material forms the outermost wall of the container, a light-weight porous material such as urethane foam an intermediate layer, and a phase change material with a melting point of around 70 degrees F. to 125 degrees F. forms the innermost wall.
1. A fire protective container, comprising:
a. an outer wall composed of:
i. water glass composed of a sodium silicate solution that is about 40% solids, 60% water, and having a SiO 2 :Na 2 0 ratio in the range of about 2:1 to 4:1;
ii. calcium chloride; and
iii. an agent for binding free water;
b. an intermediate wall; and
c. an inner wall composed of dibasic and tribasic sodium phosphate, and water.
2. A fire protective container, comprising:
a. an outer wall composed of:
i. water glass composed of a sodium silicate solution that is about 40% solids, 60% water, and having a SiO2:Na20 ratio in the range of about 2:1 to 4:1;
ii. calcium chloride;
iii. dibasic sodium phosphate;
iv. calcium metasilicate; and
v. propylene glycol.
3. The fire protective container of claim 2 , wherein said outer wall is composed by weight of:
a. 56 parts by weight of said water glass;
b. 0 to 2 parts by weight of said calcium metasilicate;
c. 6 to 12 parts by weight of said dibasic sodium phosphate; and 0 to 3 parts by weight of said propylene glycol.
4. The fire protective container of claim 2 , further comprising:
a. an intermediate wall; and
b. an inner wall composed of a phase change material.
5. The fire protective container of claim 4 , wherein said outer wall is about 1 to 2 inches thick, said intermediate wall is about 0.5 to 2 inches thick, and said inner wall is about 0.25 to 1 inch thick.
6. The fire protective container of claim 5 , wherein said intermediate wall is composed of urethane.
7. The fire protective container of claim 5 , wherein said phase change material is composed of dibasic and tribasic sodium phosphate, and water.