Unlock instant, AI-driven research and patent intelligence for your innovation.

Novel application of lanthanum acetate and cerous acetate and method for preparing water-based ecologically wet synthesized leather base

A technology of wet bass and lanthanum acetate, which is applied in the direction of textiles and papermaking, can solve the problems of leaving holes and not being very mature, and achieve the effects of improving water resistance, reducing corrosion, and good coagulation effect

Active Publication Date: 2019-04-26
NORTH CHINA INST OF AEROSPACE ENG
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the wet process in the water-based ecological synthetic leather industry is not very mature. The main technical problem is how to find a suitable solvent in which the water-based resin can complete the replacement with water, or combine water in water-based polyurethane. Molecules become free water, leaving holes in the resin during the subsequent drying process, and can continue to use the previous wet production line of synthetic leather manufacturers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Novel application of lanthanum acetate and cerous acetate and method for preparing water-based ecologically wet synthesized leather base

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] A preparation method of water-based ecological synthetic leather wet-fass, the method comprising:

[0034] (1) Preparation of synthetic leather water-based slurry: add leveling agent, defoamer and film-forming aid in sequence to water-based polyurethane, stir evenly to obtain a water-based polyurethane mixture, vacuumize and defoam, and filter to obtain a synthetic leather water-based slurry materials; adding film-forming aids too early will cause demulsification;

[0035] (2) Coating the synthetic leather water-based slurry on the surface of the pre-treated non-woven fabric; improving the adhesion between the resin and the cloth base by pre-treating the surface of the non-woven fabric;

[0036] (3) preparing a lanthanum acetate aqueous solution with a mass fraction of 0.1% to 10% and / or a cerium acetate aqueous solution with a mass fraction of 0.1 to 0.33%, and testing its pH value to obtain a coagulation solution;

[0037] (4) The non-woven fabric coated with the syn...

Embodiment 1

[0046] A preparation method of water-based ecological synthetic leather wet-fass, the method comprising:

[0047](1) Add 0.5 parts of leveling agent, 0.2 parts of defoamer and 10 parts of film-forming aid F-974 to 100 parts of 50% solid content of anionic water-based polyurethane in sequence, stir magnetically for 30 minutes to obtain an aqueous solution and mix uniformly to obtain The water-based polyurethane mixed solution is vacuumized and degassed, and gauze is filtered to obtain a synthetic leather water-based slurry;

[0048] (2) Apply the synthetic leather water-based slurry on the surface of the pre-treated non-woven fabric with a scraper, and the coating thickness is 1-2 mm;

[0049] (3) preparing an aqueous solution of lanthanum acetate with a mass fraction of 0.1%, testing its pH value to be 6.45 to obtain a coagulation solution;

[0050] (4) The non-woven fabric with the synthetic leather water-based slurry obtained in step (2) is immersed in the above-mentioned c...

Embodiment 2

[0053] A preparation method of water-based ecological synthetic leather wet-fass, the method comprising:

[0054] (1) Add 0.4 parts of leveling agent, 0.3 parts of defoamer and 11 parts of film-forming aid F-974 to 100 parts of 50% solid content of anionic water-based polyurethane in sequence, stir magnetically for 30 minutes to obtain an aqueous solution and mix uniformly to obtain The water-based polyurethane mixed solution is vacuumized and degassed, and gauze is filtered to obtain a synthetic leather water-based slurry;

[0055] (2) Apply the synthetic leather water-based slurry on the surface of the pre-treated non-woven fabric with a scraper, and the coating thickness is 1-2 mm;

[0056] (3) preparing a mass fraction of lanthanum acetate aqueous solution of 0.5%, testing its pH value to be 6.58 to obtain a coagulation solution;

[0057] (4) The non-woven fabric with the synthetic leather water-based slurry obtained in step (2) is immersed in the above-mentioned coagulat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses novel application of lanthanum acetate and cerous acetate and a method for preparing water-based ecologically wet synthesized leather base. The lanthanum acetate and cerous acetate are used as curing agents for water-based synthesized leather resin slurry, can be used for transforming bound water molecules in resin into free water, more fine pore structures are reserved ina polyurethane film after heating and volatilization, so that the air permeability of synthesized leather can be improved; and the lanthanum acetate and cerous acetate enable water-based resin to forma quasi-crosslinking structure, so that the mechanical performance of the water-based ecological synthesized leather can be improved, no solvent is used in the producing process, and organic solventincluding carcinogenic DMF on environmental pollution and body injury of workers can be avoided.

Description

technical field [0001] The invention belongs to the technical field of PU synthetic leather, and in particular relates to a new application of lanthanum acetate and cerium acetate and a preparation method for wet-fass of water-based ecological synthetic leather. Background technique [0002] Traditional PU synthetic leather enterprises produce solvent-based leather. During the tanning process, a large amount of organic solvents, including carcinogenic DMF, are directly discharged into the air, causing great harm to workers and the local population. Harmful substances remaining in the product will threaten the personnel of leather product processing enterprises and the final consumers at the same time, which has large toxic and side effects and poor ecological environmental protection. With the implementation of national energy-saving, emission reduction, low-carbon, and environmental protection policies, it is imperative for the development of the synthetic leather industry ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D06N3/00D06N3/14
CPCD06N3/0059D06N3/14D06N2211/28
Inventor 刘巧宾
Owner NORTH CHINA INST OF AEROSPACE ENG