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High-polyether content embossing type wet process polyurethane resin and preparation method thereof

A wet-process polyurethane and high polyether technology, which is applied in the field of polyurethane resin and its preparation, can solve problems such as difficult processing and embossing, and achieve the effects of three-dimensional full patterns, soft hand feeling, excellent hydrolysis resistance and low temperature resistance

Inactive Publication Date: 2018-02-27
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a hydrolysis-resistant, low-temperature-resistant high-polyether-content embossed wet-process polyurethane resin and a preparation method thereof, through the re-innovation of the polyurethane resin formula and process, to solve the problem of prior art high-polyether-content resins Difficult processing and embossing problems in the back section

Method used

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  • High-polyether content embossing type wet process polyurethane resin and preparation method thereof
  • High-polyether content embossing type wet process polyurethane resin and preparation method thereof
  • High-polyether content embossing type wet process polyurethane resin and preparation method thereof

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Embodiment 1

[0031] Raw materials used in this embodiment and their proportioning ratio are shown in Table 1:

[0032] Table 1. Embodiment 1 raw material and proportioning

[0033]

[0034]

[0035] The preparation process of the high polyether content, hydrolysis-resistant and low-temperature embossing-resistant wet-process polyurethane resin in this example is as follows:

[0036] Add DMF, PPG-2, USH-301 and part of MDI to the reaction kettle according to the proportion, control the cyanohydrin ratio to 1.3, react at 60-80°C under normal pressure for 1 hour, then add PTMG-2, control the cyanohydrin ratio to 0.74, Continue to react at 60-80°C for 1 hour; add SP-2045, EG, DMF and the remaining 90% of MDI, and carry out chain extension reaction at 60-80°C. After the system viscosity meets the requirements, add the remaining DMF and GY-3000E to finally obtain the viscosity About 180Pa.s / 25℃, 30% solid content, high polyether content, hydrolysis-resistant and low-temperature embossing ...

Embodiment 2

[0038] Raw materials used in this embodiment and their proportioning ratio are shown in Table 2:

[0039] Table 2. Embodiment 2 raw materials and proportioning

[0040]

[0041] The preparation process of the high polyether content, hydrolysis-resistant and low-temperature embossing-resistant wet-process polyurethane resin in this example is as follows:

[0042] Add DMF, PPG-2, USH-301 and part of MDI to the reaction kettle according to the proportion, control the cyanohydrin ratio to 1.32, react at 60-80°C under normal pressure for 1 hour, then add PTMG-2, control the cyanohydrin ratio to 0.79, Continue to react at 60-80°C for 1 hour; add SP-2045, EG, DMF and the remaining 90% of MDI, carry out chain extension reaction at 60-80°C, add the remaining DMF and GY-6000E after the system viscosity meets the requirements, and finally obtain a viscosity of about 60Pa.s / 25℃, high polyether content, hydrolysis resistance and low temperature embossing type wet process polyurethane r...

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Abstract

The invention discloses high-polyether content embossing type wet process polyurethane resin and a preparation method thereof. The step reaction is used; organic solvents, polypropylene oxideglycol, antioxidants and partial isocyanate are added into a reaction kettle according to the proportion ratio; the cyanide to hydroxyl ratio is controlled to be 1.3 to 1.5; the normal pressure reaction is performed for 1 hour at 60 to 80 DEG C; polytetrahydrofuran dihydric alcohol are added; the cyanide to hydroxyl ratio is controlled to be 0.6 to 0.8; the reaction is performed for 1 hour; then, polyesterdihydric alcohol, chain expansion agents, organic solvents and isocyanate are added for chain expansion reaction; after the system viscosity reaches the requirements, the rest solvents and 1 to 1.5 percent of nonionic surfactants are added; the high-polyether content hydrolysis-resistant low-temperature-resistant embossing type wet process polyurethane resin with the viscosity being 60 to 180 Pa.s / 25 DEG C and the solid content being 25 to 30 percent is finally obtained. The prepared resin is applied to synthetic leather production; the prepared leather product has the three-dimensional fullpatterns, soft hand feeling and excellent hydrolysis-resistant and low-temperature-resistant performance.

Description

technical field [0001] The invention relates to the field of polyurethane resin and its preparation method, in particular to a high polyether content embossed wet-process polyurethane resin and its preparation method. Background technique [0002] With the development of the market and technology, the requirements for the hydrolysis resistance, low temperature resistance and embossing performance of polyurethane synthetic leather are getting higher and higher. Hydrolysis resistance is an important index to measure the durability of synthetic leather. Hydrolysis resistance and low temperature resistance can be achieved by introducing a large amount of polyether, but the processing performance of polyether materials is average, and it is difficult to meet the hand feeling requirements of soft synthetic leather. And embossing effect requirements require formulation and process innovation. Contents of the invention [0003] The purpose of the present invention is to provide a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/42C08G18/32
CPCC08G18/3206C08G18/4018C08G18/4238C08G18/4854C08G18/6607C08G18/76
Inventor 张彪季明洋李震武春余李李
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL