| 摘要 |
<p>The insecticide is nontoxic for warmblooded animals and people. Of it solid and effective tablets are made which attract the cockroaches and have residual effect for 1 year. The insecticide contains in mass pts: from 10 to 50 boric acid. from 50 to 90 potato and maize flour, from 3 to 15 egg powder, from 0.5 to 8 gelatine as 10% aqueous solution, from 0.5 to 9 vinylbutyral homopolymer with molecular mass Mn > 2.105 in the form of 12% solution in ethyl alcohol or of ethylene oxide with molecular mass Mn > 1.106 in the form of 1.5% aqueous solution, and/or of 0.5 to 5 copolymer of acrylic acid with acrylamide with molecular mass Mn > 5.104 or merthacrylic acid with acrylamide with molecular mass Mn > 5.105 in the form of 10% solution in a mixture of water and ethyl alcohol 1:3. 2 claims</p> |
