초록

A biocidal composition includes, in combination, poly(hexamethylene)biguanide, didecyldimethylammonium chloride a homogenizing agent and a flocculating agent. The biocidal composition is used to treat water to control microorganisms.

대표청구항 ▼

The invention claimed is: 1. A biocidal composition which includes poly(hexamethylene) biguanide hydrochloride in an amount of between 1 and 510 g/l, didecyldimethylammonium chloride in an amount of between 10 and 510 g/l, an homogenising agent selected from alcohols, polyols and polyethylene ether

The invention claimed is: 1. A biocidal composition which includes poly(hexamethylene) biguanide hydrochloride in an amount of between 1 and 510 g/l, didecyldimethylammonium chloride in an amount of between 10 and 510 g/l, an homogenising agent selected from alcohols, polyols and polyethylene ethers in an amount of 300-400 g/l and a polyquatenary amine coagulating agent including poly(epichlorohydrin-dimethylamine) in an amount effective to increase free poly(hexamethylene)biguanide hydrochloride and didecyldimethylammonium chloride available in a circulating water system. 2. A biocidal composition as claimed in claim 1, which includes a flocculating agent selected from aluminium salts, ferrous salts and ferric salts. 3. A biocidal composition as claimed in claim 1, in which the homogenising agent is selected from hexyleneglycol, propylene glycol, ethanol and mixtures of any two or more thereof. 4. A biocidal composition as claimed in claim 2, in which the flocculating agent is selected from aluminium sulphate, ferric sulphate and ferric chloride. 5. A biocidal composition as claimed in claim 1, in which the concentration of the poly(hexamethylene)biguanide hydrochloride is between 20 and 80 g/l. 6. A biocidal composition as claimed in claim 5, in which the concentration of the poly(hexamethylene)biguanide hydrochloride is about 30 g/l. 7. A biocidal composition as claimed in claim 1, in which the concentration of the didecyldimethylammonium chloride is between 80 and 180 g/l. 8. A biocidal composition as claimed in claim 7, in which the concentration of didecyldimethylammonium chloride is about 120 g/l. 9. A biocidal composition as claimed in claim 1, in which the composition includes about 350-400 g/l of the homogenising agent. 10. A biocidal composition as claimed in claim 1, in which the concentration of the polyquaternary amine coagulating agent is between 10 and 20 g/l. 11. A biocidal agent as claimed in claim 10, in which the concentration of the polyquaternary amine coagulating agent is about 15 g/l. 12. A method of making a biocidal composition, the method including the step of combining poly(hexamethylene)biguanide hydrochloride in an amount of between 1 and 510 g/l, didecyldimethylammonium chloride in an amount of between 10 and 510 g/l, an homogenising agent selected from alcohols, polyols and polyethylene ethers in an amount of 300-400 g/l and a polyquaternary amine coagulating agent including poly(epichlorohydrin-dimethylamine) in an amount effective to increase free poly(hexamethylene)biguanide hydrochloride and didecyldimethylammonium chloride available in a circulating water system. 13. A method as claimed in claim 12, which includes combining the polyquaternary amine coagulating agent in an amount of 10-20 g/l. 14. A method as claimed in claim 13 which includes combining a flocculating agent selected from aluminium salts, ferrous salts and ferric salts with the poly(hexamethylene)biguanide hydrochloride, didecylmethylammonium chloride, homogenising agent and polyquaternary amine coagulating agent.