Process for Preparing a Flame-retardant, Lightfast, Low Fogging and Degradable Car Seat Leather

摘要

The present invention discloses a process for preparing a flame-retardant, lightfast, low fogging and degradable car seat leather wherein ammonia salt deliming is replaced with an ammonia free one, tetrakis hydroxymethyl phosphonium sulfate and the flame-retardant starchy leather surfactant are used as the tanning agents to replace the conventional chrome tanning agent, hot water washing is used to reduce the fogging value of the seat leather, the flame-retardant performance is enhanced by combination of retanning, greasing and coating, the lightfast material is applied to enhance the lightfastness of the coating and the spray coating is replace with the roller coating to lower the consumption of the paints.

主权项

1. A process for preparing a flame-retardant, lightfast, low fogging and degradable car seat leather, wherein the deliming step: the deliming agent is selected from any one of the group consisting of magnesium citrate, magnesium chloride, 2-hydroxy-1,2,3 propane tricarboxylic acid magnesium, ethylmagnesium chloride, magnesium methacrylate, magnesium lactate, 4-methyl salicylate, potassium acetate and potassium gluconate; in the tanning step: 4% tetrakis hydroxymethyl phosphonium sulfate, 0.2% lactic acid, 0.2% 4-methyl salicylate, 4% flame retardant starch-type leather surfactant and 5% bayberry tannin extract are added to a pickling bath at temperature of 35° C. under operation for 4 h,
and the common denominator for the amount percentage of the above materials is the mass of the split rawhides after fleshing.