Reaction-controllable solvent-free polyurethane resin as well as preparation method and use method thereof

A solvent-free polyurethane and resin technology, applied in the field of preparation and solvent-free polyurethane resin, can solve the problems of wrinkles on the surface of synthetic leather, low peeling strength of synthetic leather, substandard physical properties, etc. Effects with low equipment requirements

Active Publication Date: 2022-07-26
JIAXING HEXIN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Regarding the production method of solvent-free polyurethane synthetic leather in the above-mentioned related art, the applicant found that the technical solution has the following defects: the degree of reaction when bonding with the base material is the most critical, if the degree of reaction is too high, the reaction is close to completion, and the bonding will be firm. Insufficient peel strength of synthetic leather results in low peel strength and substandard physical properties; to solve this problem, the current solution is to add less catalyst, but this will cause slow curing in the later stage, so that when it is rolled out of the oven, due to the pressure, it will be on the surface of the synthetic leather. Flaws such as wrinkles and cloth lines are formed, which degrades the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0035] The catalyst polyurethane micropowder is prepared from 100 g of polybutylene adipate diol with a molecular weight of 2000, 60 g of neopentyl glycol, 109 g of toluene diisocyanate TDI, and 10 g of bismuth carboxylate.

[0036] The preparation method of the catalyst polyurethane micropowder is to put 100 g of polybutylene adipate diol and 58.0 g of neopentyl glycol into a reaction kettle, heat the temperature to 60°C, and put 93 g of TDI into the reaction kettle, Control the temperature of the reaction kettle at 80 °C, react for 2.0 hours, and then put the remaining 16g of TDI into the reaction kettle until the viscosity reaches 1.5-2*10 5 At cps (80°C), add the remaining 2g of neopentyl glycol, control the reaction temperature to 80°C and react for 1h, detect the content of NCO, after detecting the absence of NCO, add 10g of bismuth carboxylate to the reaction kettle, stir evenly and then discharge , cooling, and after the liquid material solidifies into a solid, the obt...

preparation example 2

[0038] The catalyst polyurethane micropowder is prepared from 100g of polycarbonate diol with a molecular weight of 1000, 60.0g of 3-methyl 1,3-propanediol, 133.4g of TDI, 6g of stannous octoate and 4g of triethylenediamine.

[0039] The preparation method of the catalyst polyurethane micropowder: 100g of polycarbonate diol and 57.0g of 3-methyl 1,3-propanediol are put into the reaction kettle, the temperature is raised to 60°C, 113.0g of TDI is put into the reaction kettle, and the reaction is controlled. React at 80°C for 2h, then put the remaining 20.4 TDI into the reaction kettle. When the viscosity reaches 150,000-200,000 cps (80°C), add the remaining 3g of 3-methyl 1,3-propanediol to control the reaction The temperature was 80 °C for 1 hour, and the NCO content was detected. After detecting the absence of NCO, 6 g of stannous octoate and 4 g of triethylenediamine were added to the reaction kettle, stirred evenly, discharged and cooled, and after the liquid material solidi...

preparation example 3

[0041] The catalyst polyurethane micropowder is prepared from 100g of polyethylene adipate diol with a molecular weight of 1000, 60.0g of 1,3 butanediol, 133.4g of TDI, 7g of bismuth carboxylate and 3g of dimethylethanolamine. to make.

[0042]The preparation method of catalyst polyurethane micropowder is to put 100g of polyethylene adipate diol and 57.0g of 1,3-butanediol into the reaction kettle, heat up to 60°C, and put 113.0g of TDI into the reaction kettle, Control the reaction kettle temperature at 80°C for 2 hours, then put the remaining 20.4g of TDI into the reaction kettle, and when the viscosity reaches 150,000-200,000 cps (80°C), add the remaining 3g of 3-methyl 1,3-propylene glycol, The reaction temperature was controlled at 80°C for 1 hour, and the NCO content was detected. After detecting the absence of NCO, 7g of bismuth carboxylate and 3g of dimethylethanolamine were added to the reaction kettle, stirred evenly, discharged and cooled, and the liquid material so...

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Abstract

The invention relates to the field of resin synthesis, in particular to reaction-controllable solvent-free polyurethane resin as well as a preparation method and a use method thereof. The invention relates to a reaction-controllable solvent-free polyurethane resin, which is a double-component resin and is composed of a component A and a component B, the component A and the component B are both prepared from main materials and auxiliary materials; the main material in the component A is prepared from the following raw materials in percentage by mass: 5%-15% wt of a chain extender, 50-500 ppm of a catalyst, 1%-5% wt of catalyst composite micro powder for controlling the reaction rate and the balance of polyol; the auxiliary material is a functional auxiliary agent; the main material in the component B is a prepolymer obtained by reaction of polyol and isocyanate; and the main material in the component B is prepared from 55 wt% to 65 wt% of polyhydric alcohol and 35 wt% to 45 wt% of isocyanate. The method has the advantages that the reaction is controllable, and the grade rate of the product can be improved.

Description

technical field [0001] The present application relates to the field of resin synthesis, in particular to a solvent-free polyurethane resin with controllable reaction, a preparation method and a use method thereof. Background technique [0002] The use of traditional solvent-based polyurethane (PU) is easy to cause environmental pollution, which hinders the wide application of PU in functional films, finishing agents, foaming materials and other fields. Sealed solvent-free polyurethane (SFPU) has the advantages of green environmental protection, low energy consumption, high stability, and simple operation, and has become a research hotspot in the field of PU in recent years. Solvent-free polyurethane synthetic leather, as an upgraded product of solvent-based synthetic leather, has taken up a larger and larger market share in the past two years, and various synthetic leather manufacturers have increased their investment in the production of this product. [0003] The producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32
CPCC08G18/6607C08G18/6611C08G18/4018C08G18/4238C08G18/4854C08G18/4202C08G18/4808C08G18/425C08G18/4277
Inventor 纪尚超徐欣欣石磊沈连根晏雪生李寿伟赵磊
Owner JIAXING HEXIN CHEM IND
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