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High-solid epoxy-terminated polyurethane resin for synthetic leather and preparation method thereof

A technology of polyurethane resin and epoxy end-capping, which is applied in textiles and papermaking, can solve the problems of great environmental and occupational health hazards, sealing agent release and residual environmental hazards, and achieve good storage and transportation stability and environmental performance. , the effect of high solid content

Active Publication Date: 2019-06-07
SHANGHAI HUAFENG MATERIAL TECH RES INST LLP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN102964563A discloses a high-solid polyurethane resin, which still uses N,N-dimethylformamide (DMF) and butanone as solvents, wherein DMF is very harmful to the environment and occupational health; patent CN101613455B discloses A high-solid polyurethane composition, which adopts the technology of adding a sealing agent, the composition needs a higher temperature to achieve unblocking and curing, and the release and residue of the sealing agent will also cause harm to the environment

Method used

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  • High-solid epoxy-terminated polyurethane resin for synthetic leather and preparation method thereof
  • High-solid epoxy-terminated polyurethane resin for synthetic leather and preparation method thereof
  • High-solid epoxy-terminated polyurethane resin for synthetic leather and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The raw materials and quality used in this embodiment are shown in Table 1.

[0038] Table 1

[0039]

[0040] The preparation steps of high solid epoxy-terminated polyurethane resin for synthetic leather of the present embodiment are as follows:

[0041] (1) The weighed polypropylene oxide ether diol (number average molecular weight 4000), polybutylene adipate diol (number average molecular weight 2000), 1,4-butanediol and γ-caprolactone Put it into the reaction kettle, heat up to 40°C, and stir evenly;

[0042] (2) Put the weighed diphenylmethane diisocyanate into the reactor, heat up to 75°C, and detect the NCO% content after reacting at this temperature for 6 hours until the NCO% content reaches the theoretical value (NCO% theoretical value is 1.06%);

[0043] (3) Cool down to 60°C, put in the weighed glycidol, heat up to 60°C and react for 1 hour to obtain high-solid epoxy-terminated polyurethane resin for synthetic leather.

Embodiment 2

[0045] The raw materials and quality used in this embodiment are shown in Table 2.

[0046] Table 2

[0047]

[0048]

[0049] The preparation steps of high solid epoxy-terminated polyurethane resin for synthetic leather of the present embodiment are as follows:

[0050] (1) Polypropylene oxide ether diol (number-average molecular weight 6000), polyneopentyl adipate diol (number-average molecular weight 1000), neopentyl glycol and 1,2-butene carbonate Put the ester into the reaction kettle, heat up to 40°C, and stir evenly;

[0051] (2) Put the weighed diphenylmethane diisocyanate into the reactor, heat up to 75°C, and react at this temperature for 6 hours to detect the NCO% content until the NCO% content reaches the theoretical value (NCO% theoretical value is 2.54%);

[0052] (3) Cool down to 60° C., put in weighed glycidol, heat up to 70° C. and react for 1 hour to obtain a high-solid epoxy-terminated polyurethane resin for synthetic leather.

Embodiment 3

[0054] The raw materials and quality used in this embodiment are shown in Table 3.

[0055] table 3

[0056]

[0057] The preparation steps of high solid epoxy-terminated polyurethane resin for synthetic leather of the present embodiment are as follows:

[0058] (1) The weighed polypropylene oxide ether diol (number average molecular weight 6000), polymethylpropylene adipate diol (number average molecular weight 1000), 2-methyl-1,3-propanediol and carbonic acid Put the vinyl ester into the reaction kettle, raise the temperature to 30°C, and stir evenly;

[0059] (2) Put the weighed toluene diisocyanate and diphenylmethane diisocyanate into the reactor, heat up to 70°C, and detect the NCO% content after reacting at this temperature for 6 hours until the NCO% content reaches the theoretical value (NCO % theoretical value is 3.45%);

[0060] (3) Cool down to 50° C., put in weighed glycidol, heat up to 60° C. and react for 1 hour to obtain a high-solid epoxy-terminated polyure...

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Abstract

The invention discloses high-solid epoxy-terminated polyurethane resin for synthetic leather and a preparation method thereof. The high-solid epoxy-terminated polyurethane resin for the synthetic leather is prepared from the following starting materials in percentages by mass: 50-90% of polyhydric alcohol, 0.01-2% of a chain extender, 5-30% of diisocyanate, 1-20% of an epoxy group-containing sealing agent and 2-20% of a solvent, wherein the polyhydric alcohol is one or a mixture of polyether polyol and polyester polyol. The high-solid epoxy-terminated polyurethane resin is good in storage and transportation stability, high in solid content, low in release amount of a solvent volatile in preparation and use processes and good in environmental protection performance, directly reacts with a curing agent when being solidified, and is free of release of the sealing agent; the prepared synthetic leather is excellent in physical property and good in hydrolysis resistance.

Description

technical field [0001] The present invention relates to polyurethane resin and its preparation method. Background technique [0002] In most cases, polyurethane synthetic leather is composed of multiple layers of polyurethane film and fiber base cloth. In the traditional manufacturing process of polyurethane synthetic leather, a large amount of organic solvents are released from the manufacture and composite polyurethane film, which seriously pollutes the environment and harms occupational health. With the progress of society and the development of economy, the market has higher and higher requirements for the environmental protection performance of polyurethane synthetic leather, which has given birth to the development of environmentally friendly polyurethane synthetic leather. [0003] At present, the common environmentally friendly polyurethanes used for synthetic leather on the market mainly include water-based polyurethane resins, solvent-free polyurethane resins and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/28C08G18/32C08G18/40C08G18/42C08G18/48D06N3/14
CPCC08G18/2845C08G18/3206C08G18/4018C08G18/4238C08G18/4808C08G18/4825C08G18/6607D06N3/14D06N2211/28
Inventor 胡海波蒋红梅顾佳佳唐劲松
Owner SHANGHAI HUAFENG MATERIAL TECH RES INST LLP
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