Scald-resistant synthetic leather and preparing method

Abstract

A scald-resistant synthetic leather includes a silicone layer and a high-temperature resistant substrate disposed in sequence from top to bottom. A preparing method includes coating and vulcanizating a silicone slurry on the high-temperature resistant substrate, after coating the silicone slurry, sending the high-temperature resistant substrate and the silicone slurry to a drying tunnel for vulcanization to allow attachment of the silicone layer and the high-temperature resistant substrate; after the vulcanization, peeling the silicone layer and the high-temperature resistant substrate apart to obtain the scald-resistant synthetic leather; the number of processes of coating and vulcanizating is more than one, and a thickness for a single coating is 0.02-3 mm; a total thickness for coating is 0.2-0.5 mm. The silicone slurry and the high-temperature resistant substrate used in the disclosure both are environmentally friendly and harmless materials. The high-temperature resistant substrate provides a fundamental framework, and the silicone slurry is the cover.

What is claimed is: 
     
         1 . A scald-resistant synthetic leather comprising a silicone layer and a high-temperature resistant substrate disposed in sequence. 
     
     
         2 . The scald-resistant synthetic leather according to  claim 1 , wherein a surface of the high-temperature resistant substrate facing away from the silicone layer is disposed with a silicone foam layer. 
     
     
         3 . The scald-resistant synthetic leather according to  claim 2 , wherein the silicone layer, the high-temperature resistant substrate and the silicone foam layer are sequentially composite and connected together. 
     
     
         4 . The scald-resistant synthetic leather according to  claim 1 , wherein the high-temperature resistant substrate is a glass fiber or a carbon fiber. 
     
     
         5 . The scald-resistant synthetic leather according to  claim 1 , wherein a thickness of the silicone layer is 0.2-0.5 mm. 
     
     
         6 . The scald-resistant synthetic leather according to  claim 1 , wherein the silicone layer is prepared by a silicone slurry, ingredients by weight of the silicone slurry are as follows:
 vinyl polysiloxane: 45-70   polysiloxane containing hydrogen: 1-10   filler: 10-40   dyeing slurry: 4-10   platinum-group catalyst: 0.01-1   retarder: 0.001-0.1   wherein the vinyl polysiloxane is a polysiloxane with at least two vinyl groups directly connected to silicon (Si), and the at least two vinyl groups are located at an end of a main chain or a branched chain;   wherein the polysiloxane containing hydrogen is a polysiloxane with at least three hydrogen atoms directly connected to Si, the at least three hydrogen atoms are located at an end of a main chain or a branched chain of the polysiloxane containing hydrogen, or both ends of the main chain contain the at least three hydrogen atoms directly connected to Si, a mass ratio of the at least three hydrogen atoms in the polysiloxane containing hydrogen is 0.1˜1.6%; the polysiloxane containing hydrogen is one or a mixture with more of a linear chained polysiloxane, a branched polysiloxane and an annular polysiloxane;   wherein the filler is one or a mixture with more of fumed silica, precipitated silica, silicone resin, silicon powders, calcium carbonate, aluminosilicate, diatomite, aluminum oxide, aluminum hydroxide, magnesium hydroxide and titanium dioxide;   wherein the dyeing slurry is a dyestuff with polysiloxane as a disperse medium;   wherein the platinum-group catalyst is one or a mixture with more of chloroplatinic acid isopropanol solution, chloroplatinic acid tetrahydrofuran solution, chloroplatinic acid-divinyl tetramethyl disiloxane coordination complex, and chloroplatinic acid-1,3,5,7-tetravinyl-1,3,5,7-tetramethyl-octamethylcyclotetrasiloxane coordination complex, a content of platinum (Pt) atoms in the platinum-group catalyst is 100˜500000 ppm;   wherein the retarder is one or a mixture with more of methylbutynol, 1-ethynyl-1-cyclohexanol, maleic acid with an alkynyl group or derivatives thereof, fumaric acid with an alkynyl group or derivatives thereof, polyvinyl polysiloxane, pyridine, unsaturated amides, organic phosphine and sub phosphate ester.   
     
     
         7 . A preparing method of the scald-resistant synthetic leather based on  claim 1 , wherein the preparing method comprises following steps:
 step 1, coating and vulcanizating a silicone slurry on release paper, wherein the number of processes of coating and vulcanizating is more than one, a thickness for a single coating is 0.02-3 mm; a total thickness for coating is 0.2-0.5 mm;   step 2, after coating the silicone slurry, attaching the high-temperature resistant substrate and the silicone slurry to be sent to a drying tunnel for vulcanization to allow fixation of the silicone layer and the high-temperature resistant substrate;   step 3, after the vulcanization, peeling the silicone layer and the release paper apart to obtain the scald-resistant synthetic leather.   
     
     
         8 . The preparing method of the scald-resistant synthetic leather according to  claim 7 , wherein the preparing method further comprises: coating the silicone slurry with 0.01-0.1 mm thick evenly on a silicone foam whose thickness is 0.1-5 mm, then attaching the high-temperature resistant substrate to the silicone foam by a surface with the silicone slurry, vulcanizating at 80-180° C. to compose and connect the high-temperature resistant substrate and a silicone foam layer.