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Radical ion modified wet process high stripping polyurethane resin for synthetic leather and preparation method thereof

A technology of polyurethane resin and base modification, which is applied to the field of wet high peeling polyurethane resin for ion-based modified synthetic leather and its preparation, can solve the problems of high residual DMF, slow cohesion and production speed, etc., so as to improve production efficiency, Fast agglomeration, favorable effect for replacement and cleaning processes

Inactive Publication Date: 2018-10-16
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 kind of ion-based modified synthetic leather wet-process high-stripping polyurethane resin and its preparation method, to solve the problems of high DMF residue and slow coagulation production speed in the production of wet-process polyurethane synthetic leather products in the prior art

Method used

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  • Radical ion modified wet process high stripping polyurethane resin for synthetic leather and preparation method thereof
  • Radical ion modified wet process high stripping polyurethane resin for synthetic leather and preparation method thereof
  • Radical ion modified wet process high stripping polyurethane resin for synthetic leather and preparation method thereof

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preparation example Construction

[0034] A kind of preparation method of ion-based modified synthetic leather wet process high peeling polyurethane resin, comprises the following steps:

[0035] (1), adding the polyester diol of adipic acid series and an appropriate amount of small molecule dibasic alcohol chain extender and antioxidant to form the polyol compound in the solvent to form a solution with a solid content of 45-50%, The small molecule glycol chain extender accounts for 14%-18% of the total weight of the chain extender;

[0036] (2) Stir the solution obtained in step (1) evenly, then add part of diisocyanate and catalyst, so that the molar ratio of isocyanate in diisocyanate to active hydrogen in the system is 1.0-1.05:1. React at 75-85°C for 1-2h, control the viscosity of prepolymerization by controlling the reaction time, and control the viscosity at 30-40Pas / 75°C; the molar ratio of the isocyanate in the diisocyanate to the active hydrogen in the system is 1.0-1.05:1, part of the diisocyanate h...

Embodiment 1

[0039] A kind of ion-based modified synthetic leather wet-process high-stripping polyurethane resin is mainly prepared from the components shown in Table 1:

[0040] Table 1 Example 1 component table

[0041]

[0042]

[0043] Among them, the above-mentioned PET-1 and PET-2 are polyester diols with molecular weights of 1000 and 2000 respectively, which are prepared by the reaction of adipic acid, ethylene glycol and 1,4-butanediol. Hefei Amway Polyurethane New Material Co., Ltd.; dimethylolpropionic acid (DMPA) is produced by GEO Specialty Chemicals Company of the United States. The above-mentioned catalyst is organic bismuth; the reaction terminator is methanol.

[0044] An ion-based modified synthetic leather wet-process high-stripping polyurethane resin specifically includes the following steps:

[0045] (1), 300g PET-2, 300g PET-1, 10g EG and 1g antioxidant I-1010 were added to 740g DMF solvent to form a solution with a solid content of 45-50%;

[0046](2), after t...

Embodiment 2

[0049] A kind of ion-based modified synthetic leather wet-process high-stripping polyurethane resin is mainly prepared from the components shown in Table 2:

[0050] Table 2 Example 2 component table

[0051]

[0052]

[0053] Among them, the above-mentioned PET-1 and PET-2 are polyester diols with molecular weights of 1000 and 2000 respectively, which are prepared by the reaction of adipic acid, ethylene glycol and 1,4-butanediol. Hefei Amway Polyurethane New Material Co., Ltd.; Dimethylolpropionic acid (DMBA) is produced by Jiangxi Nancheng Hongdu Chemical Technology Development Co., Ltd. The above-mentioned catalyst is organic bismuth; the reaction terminator is methanol.

[0054] An ion-based modified synthetic leather wet-process high-stripping polyurethane resin specifically includes the following steps:

[0055] (1), 300g PET-2, 300g PET-1, 10g EG and 1g antioxidant I-1010 were added to 740g DMF solvent to form a solution with a solid content of 45-50%;

[0056]...

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Abstract

The invention discloses radical ion modified wet process high stripping polyurethane resin for synthetic leather and a preparation method thereof. The radical ion modified wet process high stripping polyurethane resin for synthetic leather is prepared from the following components: diisocyanate, a polyhydric alcohol compound, a micromolecular dihydric alcohol chain extender, a catalyst, an antioxidant, a solvent and a reaction terminating agent methyl alcohol; the polyhydric alcohol compound is adipic acid series polyester glycol, and the chain extender is selected from a conventional chain extender ethanediol and a dihydric alcohol chain extender with carboxyl. A pre-polymerizing method is adopted in the synthesis method of polyurethane, the softness and hardness phase separation degree of resin is improved, and the stripping strength of resin is enhanced. Meanwhile, an appropriate amount of chain extender with carboxyl is introduced into the molecular chain, so that the replacement effect of wet process polyurethane resin in a DMF (dimethyl formamide) water solution can be effectively improved, the agglomeration speed of polyurethane resin is improved, accordingly the productionefficiency is increased, the content of the organic matter VOC (volatile organic compounds) in the synthetic leather is reduced, and radical ion modified wet process high stripping polyurethane resinhas wide application prospect in the technical field of polyurethane synthetic leather.

Description

technical field [0001] The invention relates to the field of wet-process polyurethane resin for synthetic leather, in particular to a wet-process high-stripping polyurethane resin for ion-modified synthetic leather and a preparation method thereof. Background technique [0002] Polyurethane (PU) synthetic leather is a new type of polymer composite material similar to natural leather made of fiber fabrics as the base material, coated with PU resin, and made by wet or dry processes. It has excellent adhesion to the base material , anti-wear, flex resistance, anti-aging and other excellent mechanical properties, but also has the advantages of convenient processing, uniform quality, low price, etc., is an ideal substitute for natural leather. Wet-process polyurethane resin is coagulated and processed in DMF aqueous solution, resulting in high residual DMF in synthetic leather products. When preparing high-stripping synthetic leather products with less fillers, the coagulation sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/34C08G18/32C08G18/12
CPCC08G18/12C08G18/3206C08G18/4238C08G18/664C08G18/7671C08G18/348
Inventor 尹凯凯葛礼响田海英
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL
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