Multicolored siilicone synthetic leather and preparing method

Abstract

A multicolored silicone synthetic leather includes an A colored silica layer, a B colored silica layer and a substrate sequentially disposed from top to bottom. Colors of the A colored silica layer and the B colored silica layer are different. A preparing method adopts silicone slurries with two colors, respectively are a slurry A and a slurry B; the slurry A is coated on release paper for vulcanization, and a thickness for coating is 0.01-0.1 mm; the slurry B is coated on the vulcanizated slurry A, and times for coating is more than one, and except final coating, the vulcanization is requested for the silicone slurries before next coating in former coating processes; the final coating is attached to a substrate for the vulcanization; the multicolored silicone synthetic leather is obtained after peeling the release paper. The synthetic leather prepared in the disclosure is environmentally friendly and harmless to human.

What is claimed is: 
     
         1 . A multicolored silicone synthetic leather comprising an A colored silica layer, a B colored silica layer and a substrate sequentially disposed from top to bottom, wherein colors of the A colored silica layer and the B colored silica layer are different. 
     
     
         2 . The multicolored silicone synthetic leather according to  claim 1 , wherein the A colored silica layer, the B colored silica layer and the substrate are composite and connected in sequence. 
     
     
         3 . The multicolored silicone synthetic leather according to  claim 1 , wherein a thickness of the A colored silica layer is 0.01-0.1 mm, and a thickness of the B colored silica layer is 0.1-0.3 mm. 
     
     
         4 . The multicolored silicone synthetic leather according to  claim 1 , wherein the B colored silica layer is composed of silica layers with more than one color. 
     
     
         5 . The multicolored silicone synthetic leather according to  claim 1 , wherein the A colored silica layer is composed of silica layers with more than one color. 
     
     
         6 . A preparing method of the multicolored silicone synthetic leather based on  claim 1 , wherein silicone slurries with two colors are used, respectively are a slurry A and a slurry B; the slurry A is coated on release paper for vulcanization, and a thickness for coating is 0.01-0.1 mm; the slurry B is coated on the slurry A after the vulcanization, and times of coating is more than one, and except final coating, the vulcanization is requested for the silicone slurries before next coating in other coating processes; the final coating is attached to a substrate for the vulcanization; the multicolored silicone synthetic leather is obtained after peeling the release paper. 
     
     
         7 . The preparing method of the multicolored silicone synthetic leather according to  claim 6 , wherein additional ratios of the slurry A and the slurry B are as follows:
 the slurry A 0.1-1%   the slurry B 5-15%.   
     
     
         8 . The preparing method of the multicolored silicone synthetic leather according to  claim 6 , wherein a solid content of the slurry A is 10-70%, and a solid content of the slurry B is 100%. 
     
     
         9 . The preparing method of the multicolored silicone synthetic leather according to  claim 6 , wherein a diluent adopted by the slurry A is a volatilizable non-poisonous dissolvent whose boiling point is 60-150° C. without contamination. 
     
     
         10 . The preparing method of the multicolored silicone synthetic leather according to  claim 6 , comprising following steps:
 step 1, preparing the slurry A and the slurry B with different colors and solid contents;   step 2, coating the slurry Aon the release paper to be 0.01-0.1 mm thick for heating and solidifying at 80-150° C. in a drying tunnel for 1-10 minutes;   step 3, coating the slurry B on the slurry A after solidifying for more than one time; wherein a total coating thickness of the slurry B is 0.1-0.3 mm; except final coating, the vulcanization is requested for the silicone slurries before next coating in other coating processes; a vulcanization temperature is 80-150° C., and each vulcanization time is 1-10 minutes;   step 4, attaching the substrate to the slurry B after final coating for heating and solidifying at 80-150° C. in a drying tunnel for 1-20 minutes;   step 5, peeling the release paper.