Water-proof agent for leathers
The invention relates to a water-proof agent for leathers, belonging to the technical field of leather water-proofing. The water-proof agent for the leathers consists of the following components in parts by weight: 5-8 parts of dimethyl polysiloxane, 20-30 parts of hydroxyl polysiloxane, 10-15 parts of amino-polysiloxane, 5-8 parts of cottonseed oil, 10-25 parts of turpentine oil, 25-45 parts of paraffin, 70-80 parts of ethanol, 40-50 parts of chromium trichloride and 20-40 parts of water. Polysiloxane compounds are insoluble in water, and some components such as paraffin, neutral oil and the like are also added into the compounds to obtain the water-proof agent for the leathers with extremely excellent water-proof effects; and after the leathers are treated by polysiloxane water-proof agents, a layer of elastic film can be formed between leather fiber gaps, so that the hydrophobic performance and anti-aging performance of the leathers can be greatly improved, and the service life of the leathers can be prolonged; and meanwhile, the natural 'breathing' sanitary performance of the leathers can be kept, and the flexibility and smoothness of the leathers can also be increased. 1. A leather water-repellent, characterized in that is composed of the following parts by weight of the component: Dimethyl polysiloxane 5-8 parts, hydroxy poly siloxane 20-30 parts, amino-poly-siloxane 10-15 parts, cotton-seed oil 5-8 parts, terebenthene 10-25 parts, paraffin 25-45 parts, ethanol 70-80 parts, three chlorization chromium 40-50 parts, water 20-40 parts. 2. A leather water-repellent, characterized in that is composed of the following parts by weight of the component: Dimethyl polysiloxane 5-7 parts, hydroxy poly siloxane 20-26 parts, amino-poly-siloxane 10-13 parts, cotton-seed oil 5-7 parts, terebenthene 10-21 parts, paraffin 25-38 parts, ethanol 70-78 parts, three chlorization chromium 40-47 parts, water 20-36 parts. 3. A leather water-repellent, characterized in that is composed of the following parts by weight of the component: Dimethyl polysiloxane 6-8 parts, hydroxy poly siloxane 22-30 parts, amino-poly-siloxane 11-15 parts, cotton-seed oil 6-8 parts, terebenthene 13-25 parts, paraffin 29-45 parts, ethanol 72-80 parts, three chlorization chromium 42-50 parts, water 26-40 parts. 4. A leather water-repellent, characterized in that is composed of the following parts by weight of the component: Dimethyl polysiloxane 6-7 parts, hydroxy poly siloxane 21-27 parts, amino-poly-siloxane 12-14 parts, cotton-seed oil 6-7 parts, terebenthene 17-23 parts, paraffin 31-41 parts, ethanol 72-77 parts, three chlorization chromium 43-48 parts, water 21-35 parts. 5. A leather water-repellent, characterized in that is composed of the following parts by weight of the component: Dimethyl polysiloxane 6 parts, hydroxy poly siloxane 24 parts, amino-poly-siloxane 12 parts, cotton-seed oil 6 parts, terebenthene 16 parts, paraffin 35 parts, ethanol 74 parts, three chlorization chromium 45 parts, water 25 parts.