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Moisture-curable leather polishing coating agent

A moisture-curing and finishing agent technology, applied in leather surface treatment, small raw hide/big raw hide/leather/fur treatment, small raw hide/large raw hide/leather skin/fur chemical treatment, etc., can solve poor bending resistance at low temperature , the gloss is not good enough, the overall performance is not high, etc., to achieve the effect of strong crystal feeling, good visual effect, good low temperature bending resistance

Active Publication Date: 2008-10-01
JIANGSU BAOZE POLYMER MATERIAL
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AI Technical Summary

Problems solved by technology

[0004] With the wide application of leather materials, the performance requirements for surface finishing agents such as gloss and weather resistance (low temperature bending resistance) are also increasing. However, the currently developed moisture-curing leather finishing agents are not good enough in terms of gloss. And low temperature bending resistance is relatively poor, the overall performance is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A moisture-curing leather bright finish agent, each raw material component is weighed according to the following weight ratio: toluene diisocyanate 17.5%, diphenylmethane diisocyanate 4%, polyether polyol (molecular weight is 1000) 32% , Ternary lower alcohol 3.5%, butyl acetate 19.5%, xylene 23%, antioxidant 0.2%, stabilizer 0.1%, leveling agent 0.2%.

[0018] The production technology of this moisture curing type leather bright finishing agent, concrete steps are as follows:

[0019] ①: Put toluene diisocyanate, diphenylmethane diisocyanate, polyether polyol, ternary lower alcohol, antioxidant and half of the solvent (mixture of butyl acetate and xylene) into the reaction kettle and heat it to about 80°C. Stir for about 12 hours until the end of the reaction is detected;

[0020] ②: Add the remaining half of butyl acetate and xylene to the reaction kettle and stir for half an hour;

[0021] ③: Add stabilizer and leveling agent to the cooled reaction kettle and stir ...

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Abstract

The invention relates to a moisture solidification type leather brightening finishing agent with high brightness and weathering resistance, comprising polyurethane prepolymer, wherein the polyurethane prepolymer is prepared by reacting diisocyanate, polyatomic alcohol with initiator in the presence of organic solvent; the polyurethane prepolymer includes dissociative isocyan acid radical, the polyatomic alcohol is the mixture of one or two of the group consisting of polyester polyatomic alcohol, polyether glycol. Compared with prior art, the invention not only has the better performance to resist twist at low temperature, but also can realize high brightness and strong crystal sense after finishing the invention on the leather, so the invention has greater visual effect.

Description

technical field [0001] The invention relates to a leather finishing agent, in particular to a room-temperature moisture-curable leather finishing agent, in particular to a room-temperature moisture-curable leather finishing agent with high gloss and excellent bending resistance. Background technique [0002] At present, bright finishing agent products in the synthetic leather market are becoming a popular trend in the future, and are widely used in luggage, clothing, and footwear products. [0003] After the general leather surface finishing agent is painted on the leather, it needs to be dried and then processed. However, the moisture-curing leather surface finishing agent is different. It is mainly composed of polyurethane prepolymer. After the leather is coated with this material, it does not need to be dried. It can be placed directly in the air (or appropriately increase the air humidity and temperature), the dry time is 2 to 4 hours, and it takes 8 to 12 hours to matur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C11/00C08G18/10C08G18/48C08G18/76
Inventor 时云刚
Owner JIANGSU BAOZE POLYMER MATERIAL
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