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Super black and misty leather surface treatment agent and preparation method thereof

A technology of surface treatment agent and special fog, which is applied in the field of special black special fog leather surface treatment agent and its preparation, to achieve the effect of improving water resistance, good bonding force and large bonding degree

Active Publication Date: 2010-10-06
JIAXING HEXIN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, consumers have higher and higher requirements for the color and feel of the leather surface. For example, the blackness and haze of the coating layer must be increased. At the same time, it is also required to have a waxy and smooth feeling. Fog surface treatment agents can no longer meet the increasing demands of consumers for aesthetics and feel, and the leather surface treatment agents of Teheite Fog have not yet been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The preparation process of this special black special fog leather surface treatment agent, its steps are:

[0034] 1) Accurately weigh the glazing powder, wax, and solvent according to the proportion, add them into the reactor, stir at room temperature for 30 minutes,

[0035] 2) Add 30% of the total amount of solvent-based PU resin, stir at room temperature for 40 minutes,

[0036] 3) Add 70% of the weight of the remaining solvent-based PU resin, stir at room temperature for 60 minutes,

[0037] 4) After grinding it for 20 minutes, filter it with a 120-mesh polypropylene net to get the finished product;

[0038] The solvent-based PU synthesis process described therein is: add the chain extender and polyol into the reaction kettle, raise the temperature to 50°C, and stir for 30 minutes; then add the diisocyanate into the reaction kettle, and heat up to 85-95°C , react for 2 hours; then add catalyst, continue to react at 85-95°C for 2 hours, add a part of solvent, cool...

Embodiment 1

[0040] 1) Preparation of solvent-based PU: 130 g of polyols (wherein polyethylene adipate diol 50%, polyadipate-1,4-butylene glycol ester 50% in a 1L reactor) ), chain extender 9g (wherein ethylene glycol 50%, 1,4-butanediol 25%, 1,6-hexanediol 25%) and antioxidant 0.7g, heated to 55 ℃, stirred for 30 minutes, added Diisocyanate (wherein isophorone diisocyanate 50%, toluene diisocyanate 50%) 50g, continue to heat up to 90 ℃, after reacting for 4 hours, add solvent 30g and catalyst 0.1g, react at 90 ℃ for 2~4 hours, Add 320g of solvent (wherein toluene 50%, isopropanol 50%), cool to below 40°C, titrate with aliphatic amine chain extender until the viscosity is 80,000-100,000 cps / 25°C, then add the remaining solvent (where Toluene 50%, isopropanol 50%) 100g, heat up to 70°C, continue to stir for 2 hours, after the viscosity is stable, get solvent-type PU639.8g, solid content is 30%, viscosity is 40,000-80,000 cps / 25°C .

[0041] 2) Preparation of surface treatment agent: Accur...

Embodiment 2

[0043] 1) Preparation of solvent-based PU: 130g of polyols (wherein polytetrahydrofuran diol 50%, polyoxypropylene diol 30%, polycaprolactone diol 20%), chain extender 9g ( Wherein ethylene glycol 50%, 1,4-butanediol 40%, neopentyl glycol 10%) and antioxidant 0.7g, heat to 55 ℃, stir for 30 minutes, add diisocyanate 50g (wherein isophorone two Isocyanate 50%, diphenylmethane diisocyanate 50%), continue to heat up to 90 ℃, after reacting for 3 hours, add solvent 30g and catalyst 0.1g, react at 90 ℃ for 3 hours, add solvent 320g (wherein toluene 50%, iso Propanol 50%), cooled to below 40°C, titrated with aliphatic amine chain extender until the viscosity is 80,000 to 100,000, then add the remaining solvent 100g (wherein toluene 50%, isopropanol 50%), and heat up to Continue to stir at 70°C for 2 hours. After the viscosity is stable, 39.8g of solvent-based PU is obtained, with a solid content of 30% and a viscosity of 40,000-80,000 cps / 25°C.

[0044] 2) Preparation of surface tr...

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PUM

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Abstract

The invention relates to a super black and misty leather surface treatment agent which is prepared by mixing the following components in parts by weight: 100 parts of solvent type PU, 10-20 parts of flatting powder, 5-10 parts of wax and 200-250 parts of solvent, wherein the solvent type PU is prepared by reaction of diisocyanate, polylol, chain extenders, catalysts and light stabilizers under the condition of existence of organic solvents. Compared with the original common black and misty leather surface treatment agent, the super black and misty leather surface treatment agent obviously increases the blackness and the haze of coatings, improves the crumpling resistance, the wear resistance and the scratch resistance of coatings, and enables leathers to have waxy effect.

Description

technical field [0001] The invention relates to a surface treatment agent for leather, in particular to a special black special fog leather surface treatment agent and a preparation method thereof. Background technique [0002] Polyurethane leather surface treatment agent can be used for surface coating according to the product category. The coating is thin, soft and elastic, and has a firm bond with the leather, giving the synthetic leather a high degree of aesthetics. The color is uniform, natural, soft, and moist. , closer to genuine leather, polyurethane leather surface treatment agent has attracted more and more attention from the leather industry due to its excellent performance. In recent years, consumers have higher and higher requirements for the color and feel of the leather surface. For example, the blackness and haze of the coating layer must be increased. At the same time, it is also required to have a waxy and smooth feeling. Fog surface treatment agents can n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D175/08C09D191/06C09D7/12D06M15/568D06M15/572D06N3/14
Inventor 魏建平刘世昌王大平江雄知杨赞
Owner JIAXING HEXIN CHEM IND
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