Organosilicone modified isocyanate prepolymer for solvent-free type synthetic leather and preparation method thereof

• Main Authors: CAO MIN, SUN JIAPENG, DONG HUOCHENG, WEN RONGZHENG, ZHAO XIUWEN, LI NING
• Format: Patent
• Language: Chinese; English
• Published: 20.04.2018
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR; LAUNDERING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF TEXTILES OR THE LIKE; WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL

The invention discloses an organosilicone modified isocyanate prepolymer for solvent-free type synthetic leather and a preparation method thereof. The prepolymer contains a compound in the structure shown in the description, wherein R is aryl or fatty group; a and b are natural numbers. The preparation method comprises the following steps that (1) octamethylcyclotetrasiloxane, 2,4,6,8-tetramethyl-2,4,6,8-tetraphenylcyclotetrasiloxane and acid catalysts are added into a reactor; then, tetramethyl dihydrodisiloxane is added; ring-opening polymerization reaction is performed for 4 to 6h at 60 to80 DEG C; temperature reduction, neutralization, water washing, filtering and micromolecule by-product removal are performed to obtain hydrogen-terminated blocking methyl phenyl polysiloxane; (2) thehydrogen-terminated methyl phenyl polysiloxane obtained in the step (1) and allyl amine react under H2PtCl6 catalysts to prepare hydrogen-terminated blocking methyl phenyl polysiloxane; (3) the product in the step (2) is dehyd