Production method of biobased solvent-free polyurethane synthetic leather

A solvent-free polyurethane and production method technology, applied in textiles and papermaking, etc., can solve the problems of physical health threat, DMF residue, non-cleaning of field operators, etc., and achieve environmental protection, improved catalytic activity, and shortened curing time. Effect

Active Publication Date: 2017-08-04
聊城市鑫润达塑胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These organic solvents are extremely volatile during the production process, seriously pollute the environment, and pose a threat to the health of on-site operators
[0005] According to the above-mentioned solvent-based production system of polyurethane synthetic leather, the production process has serious environmental pollution problems such as MDF, TOL, MEK, THF and other solvents. It is a non-clean production process and has great harm to the human body.
DMF residues are prone to cause product safety problems in the resulting polyurethane synthetic leather

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for producing bio-based solvent-free polyurethane synthetic leather, comprising the following steps:

[0039] (1) Put component A containing hydroxyl group (-OH) and component B containing isocyanate group (-NCO) into the reactor according to a certain ratio, and fully mix and react at 30°C and 80 rpm for 10 minutes to obtain Foam slurry with fine foam.

[0040] The A component is prepared through the following process: in parts by mass, 50 parts of castor oil, 22 parts of polytetrahydrofuran ether glycol 2000 (abbreviated as PTMEG, with a relative molecular mass of 2000), 22 parts of Span 80 (also known as span-80 , as an emulsifier, the main components are 0.3 parts of sorbitan oleate), 0.01 parts of 1,8-diazabicyclo[5.4.0]undec-7-ene (abbreviated as DBU) and 1,8 - 0.1 part of diazabicyclo[5.4.0]undec-7-ene formate (abbreviated as DBU formate) was heated to 30°C and then fully stirred and mixed to obtain component A.

[0041] The B component is liquefied di...

Embodiment 2

[0048] A method for producing bio-based solvent-free polyurethane synthetic leather, comprising the following steps:

[0049] (1) Put component A containing hydroxyl group (-OH) and component B containing isocyanate group (-NCO) into the reactor according to a certain ratio, and fully mix and react at 35°C and 90 rpm for 7 minutes to obtain Foam slurry with fine foam.

[0050] The A component is prepared through the following process: in parts by mass, 55 parts of castor oil, 20 parts of polytetrahydrofuran ether glycol 2000 (abbreviated as PTMEG, with a relative molecular mass of 2000), 20 parts of Span 80 (also known as span-80 , as an emulsifier, the main components are 0.4 parts of sorbitan oleate), 0.05 parts of 1,8-diazabicyclo[5.4.0]undec-7-ene (abbreviated as DBU) and 1,8 - 0.02 parts of diazabicyclo[5.4.0]undec-7-ene formate (abbreviated as DBU formate) was heated to 35°C and then fully stirred and mixed to obtain component A.

[0051] The B component is liquefied d...

Embodiment 3

[0058] A method for producing bio-based solvent-free polyurethane synthetic leather, comprising the following steps:

[0059] (1) Put component A containing hydroxyl group (-OH) and component B containing isocyanate group (-NCO) into the reactor according to a certain ratio, and fully mix and react at 40°C and 100 rpm for 5 minutes to obtain Foam slurry with fine foam.

[0060] The A component is prepared through the following process: in parts by mass, 60 parts of castor oil, 25 parts of polytetrahydrofuran ether glycol 2000 (abbreviated as PTMEG, with a relative molecular mass of 2000), 25 parts of Span 80 (also known as span-80 , as an emulsifier, the main components are 0.5 part of sorbitan oleate), 0.1 part of 1,8-diazabicyclo[5.4.0]undec-7-ene (abbreviated as DBU) and 1,8 - 0.04 parts of diazabicyclo[5.4.0]undec-7-ene formate (abbreviated as DBU formate) was heated to 40°C and then fully stirred and mixed to obtain component A.

[0061] The B component is liquefied dip...

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Abstract

A production method of biobased solvent-free polyurethane synthetic leather comprising the steps of adding a hydroxyl containing component A and an isocyanate group containing component B into a reaction kettle, stirring for reaction to form foaming slurry, applying the foaming slurry to release paper in a scraping manner by using a dry synthetic leather production line to form a coating, laminating the coating with base cloth in a clearance laminating manner by using a laminating machine, putting in an oven for curing, and performing cooling and stripping to form the biobased solvent-free polyurethane synthetic leather. The biobased solvent-free polyurethane synthetic leather is produced by using a double foaming technology, an in-situ polyurethane polymerize technology, a heat-sensitive catalyst asynchronous catalysis technology and a single-knife constant temperature thermal scraping application technology; a production technology is environment-friendly, concise and stable; the product quality is good; biomass that is cheap and easy to obtain serves as a raw material; the use of a fossil raw material can be reduced; and environmental protection is facilitated.

Description

technical field [0001] The invention relates to the technical field of polyurethane synthetic leather, in particular to a production method of bio-based solvent-free polyurethane synthetic leather. Background technique [0002] Polyurethane synthetic leather is a composite material that simulates the structure and performance of natural leather and can be used as a substitute for natural leather. Usually non-woven fabric is used to simulate the mesh layer, and microporous polyurethane coating is used to simulate the grain layer. The front and back of the obtained synthetic leather are very similar to leather, and have a certain degree of air permeability, which is closer to natural leather than ordinary artificial leather. Widely used in making shoes, boots, bags and ball games. [0003] In terms of output, the output of plastic artificial synthetic leather in my country increased from 1.8482 million tons in 2009 to 3.438 million tons in 2015, with a compound growth rate of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/00D06N3/14C08G18/20C08G18/36C08G18/48C08G18/66C08G101/00
CPCC08G18/2063C08G18/36C08G18/4854C08G18/6696C08G2101/00D06N3/0043D06N3/0097D06N3/147D06N2211/28
Inventor 马兴元刘帅段月丁博张铭芮赵昭
Owner 聊城市鑫润达塑胶制品有限公司
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