Patent DE-19505464-A1 (DE)
Title: Fire-protective substance for steel, plastics and wood
Inventor: BALLE ERIKA
IPC: C09K21/04
Filed: 1995-02-17
Abstract: A fire-protective substance partic. for treating steel objects comprises: (a) at least 1 primary component including a dehydrating agent, binding agent, ceramic wool, fire-proof clay and/or a glaze; (b) an intermediate component including a dehydrating agent, ceramic wool, fire-proof clay, glaze, insulating material and an additional clay; and (c) a swelling component including a dehydrating agent, binding agent, blowing agent, ceramic wool, fire-proof clay, blowing graphite and/or insulating layer forming agent. Also claimed are: (i) a method for depositing a fire-protective substance on a steel object comprising: (a) depositing the first priming component onto the surface of a clean, fat-free object, (b) depositing an intermediate component or a swelling component onto the first priming component, (c) depositing a swelling component or an intermediate component (unless already deposited) onto the component of step (b), and (d) depositing a second priming component onto the component of step (c); (ii) a fire-protective substance for plastic materials partic. thermoplastic, duroplastic, elastomeric materials or polyurethanes contg. an ammonium polyphosphate dehydrating agent and melamine, melamine phosphate or melamine cyanurate blowing agent; (iii) a fire-protective substance for the treatment of wood or materials comprising wood or regenerating raw materials contg. a hydrating agent, binding agent, blowing agent and insulating layer forming agent; (iv) a fire-protective substance for coating cables contg. a dehydrating agent, binding agent, blowing agent, clay and an insulating layer forming agent; (v) a fire-protective substance for wettable and/or absorptive materials partic. textiles, paper, paperboard, regenerating raw materials contg. a dehydrating agent comprising urea phosphate, monoammonium phosphate and diammonium phosphate, ammonium hydrogen phosphate, ammonium phosphate or ammonium sulphate, and a binding agent; (vi) the prodn. of a fire-protective substance for wettable and/or absorptive materials comprising: (a) dissolving 19 g binding agent in 1 l of water at 60-80  deg C, (b) adding 19 l of water at 60-80  deg C, (c) adding 8.2 kg urea phosphate and 4.2 kg monoammonium phosphate, (d) adding 50 pts. wt. water, (e) adding diammonium phosphate, ammonium hydrogen phosphate, ammonium phosphate, or ammonium sulphate to adjust the pH of the soln. to 6.5-7.2, and (f) opt. diluting the soln. with water so that the portion of the soln. in the final soln. is 10-100 wt.%; and (vii) a method for treating materials with a fire-protective substance comprising depositing the fire-protective substance as an impregnating or coating agent onto the material to be protected, or directly incorporating the fire-protective substance as an additive or filler into the material, and brushing or spraying the material with the fire-protective substance or submerging it in the substance. The fig. is a cross section of steel object provided with a fire-protective substance. The fire-protective substance (6) comprises a first priming component (10), an intermediate component (11), a swelling component (12) and a second priming component (13).