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Production method of waterproof organosilicon modified solvent-free polyurethane synthetic leather

A solvent-free polyurethane and production method technology, applied in ships, transportation and packaging, textiles and papermaking, etc., can solve problems such as physical health threats to field operators, product safety issues, solvent environmental pollution, etc. Improved activity and good controllability

Inactive Publication Date: 2017-10-20
SHAANXI UNIV OF SCI & TECH
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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 waterproof silicone-modified solvent-free polyurethane synthetic leather, comprising the following steps:

[0039](1) Add 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 80rpm for 8 minutes. A foamed slurry with fine foam is obtained.

[0040] The A component is a mixture of various dihydric alcohols and various auxiliary agents, and is prepared by the following method: in parts by mass, 40 parts of polytetrahydrofuran ether glycol 2000 (PTMEG for short, with a relative molecular mass of 2000) , Polypropylene glycol 2000 (referred to as PPG, relative molecular mass 2000) 20 parts, hydroxyl silicone oil (relative molecular mass 6000) 15 parts, Span 80 (also known as span-80, as an emulsifier, the main component is sorbitan Oleate) 0.3 part, 1,8-diazabicyclo[5.4.0]undec-7-ene (referred to as DBU) 0.01 part and 1,8-diazab...

Embodiment 2

[0048] A method for producing waterproof silicone-modified solvent-free polyurethane synthetic leather, comprising the following steps:

[0049] (1) Add component A containing hydroxyl group (-OH) and component B containing isocyanate group (-NCO) into the reaction kettle according to a certain proportion, and fully mix and react at 40°C and 100rpm for 68 minutes, A foamed slurry with fine foam is obtained.

[0050] The A component is a mixture of various dihydric alcohols and various auxiliary agents, and is prepared by the following method: in parts by mass, 50 parts of polytetrahydrofuran ether glycol 2000 (PTMEG for short, with a relative molecular mass of 2000) , Polypropylene glycol 2000 (referred to as PPG, relative molecular mass 2000) 30 parts, hydroxyl silicone oil (relative molecular mass 6000) 10 parts, Span 80 (also known as span-80, as an emulsifier, the main component is sorbitan Oleate) 0.4 part, 1,8-diazabicyclo[5.4.0]undec-7-ene (abbreviated as DBU) 0.1 part...

Embodiment 3

[0058] A method for producing waterproof silicone-modified solvent-free polyurethane synthetic leather, comprising the following steps:

[0059] (1) Add component A containing hydroxyl group (-OH) and component B containing isocyanate group (-NCO) into the reactor according to a certain proportion, and fully mix and react at 45°C and 90rpm for 5 minutes, A foamed slurry with fine foam is obtained.

[0060] The A component is a mixture of various dihydric alcohols and various auxiliary agents, and is prepared by the following method: in parts by mass, 55 parts of polytetrahydrofuran ether glycol 2000 (PTMEG for short, with a relative molecular mass of 2000) , Polypropylene glycol 2000 (referred to as PPG, relative molecular mass 2000) 25 parts, hydroxyl silicone oil (relative molecular mass 6000) 11 parts, Span 80 (also known as span-80, as an emulsifier, the main component is sorbitan Oleate) 0.5 part, 1,8-diazabicyclo[5.4.0]undec-7-ene (referred to as DBU) 0.03 part and 1,8-...

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Abstract

The invention discloses a production method of waterproof organosilicon modified solvent-free polyurethane synthetic leather. The production method comprises the following steps: firstly, adding a component A containing hydroxyl and a component B containing an isocyanate group into a reaction still, and reacting by stirring to obtain foaming slurry; secondly, adopting a dry process production line of the synthetic leather, blade coating the foaming slurry on release paper to form a coating, and then laminating the coating with a base fabric by a gap fitting mode through a laminating machine; thirdly, feeding a mixture into a drying oven for cooking to obtain the waterproof organosilicon modified solvent-free polyurethane synthetic leather. According to the production method disclosed by the invention, the waterproof organosilicon modified solvent-free polyurethane synthetic leather is produced by adopting a double foaming technology, a polyurethane in-situ polymerization waterproof technology, a heat-sensitive catalyst asynchronous catalysis technology and a single-pole constant temperature heating scrape coating technology; the production technology is environmentally friendly, simple, and stable; the quality of a product is good; a contact angle of water droplets on the surface of the synthetic leather is as high as 107 degrees, and static water seepage prevention can be kept for 15 days; the waterproof organosilicon modified solvent-free polyurethane synthetic leather can be used as a high-end functional yacht seat covering material.

Description

technical field [0001] The invention relates to the technical field of polyurethane synthetic leather, in particular to a production method of waterproof silicone-modified 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 comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14D06N3/00C08G18/48C08G18/61C08G101/00
CPCD06N3/14C08G18/4808C08G18/4854C08G18/61C08G2101/00D06N3/0004D06N3/0009D06N3/0011D06N3/0097D06N2209/128D06N2211/266D06N2211/28
Inventor 马兴元张铭芮段月丁博刘帅赵昭
Owner SHAANXI UNIV OF SCI & TECH
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