Abstract
3,5-Diamino-1,2,4-triazole, commonly known as guanazole was found to polymerize very readily with THPC and THPOH. At pH 2.8, THPC and guanazole solutions formed a gel within 30 min. The solutions were more stable as the pH was increased, reaching a maximum stability of 20-24 hrs. at pH 9.0 at room temperature (26-28°C) before polymer separation. The solution stability was greatly reduced at temperatures of 34°C or more. The solutions were considered to contain THPOH at pH values of 7.0 or above. Cotton fabric was treated with THPOH-guanazole by a pad-dry-cure procedure. A solution pH of 9.0 was considered to be optimum since the pad bath was most stable at this pH. The reaction on cotton is rapid and efficient at temperatures ranging from 140-160°C. The fabric had excellent flame-retardancy, which was very durable to repeated laundering. For example, 4 oz. cotton flannelette with an add-on of 15% had a 2.6 in. char length after 50 launderings as measured by AATCC Test Method 34-69. An add-on of about 20% is required to pass the.Children's Sleepwear Flammability Standard, DOC FF 3-71. The finish is very sensi tive to chlorine; therefore, the fabric should not be bleached with hypo chlorite.
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