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Polypropylene carbonate type polyurethane resin as well as preparation method and application thereof

A technology of polypropylene carbonate and polypropylene carbonate glycol, applied in textiles and papermaking, etc., can solve undisclosed problems, and achieve the effect of reducing demand, realizing effective utilization, and excellent hydrolysis resistance.

Active Publication Date: 2014-04-16
SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, up to now, there has been no publication of studies on the simultaneous consideration of heat resistance and hydrolysis resistance of polyurethane resins by introducing polypropylene carbonate units into the molecular structure of polyurethane, nor has there been any application of polypropylene carbonate binary units. The polyurethane resin prepared by alcohol is used in the dry process of synthetic leather

Method used

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  • Polypropylene carbonate type polyurethane resin as well as preparation method and application thereof
  • Polypropylene carbonate type polyurethane resin as well as preparation method and application thereof
  • Polypropylene carbonate type polyurethane resin as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The raw materials and weights used in this example are shown in Table 1.

[0041] Table 1

[0042]

[0043] The preparation steps of the polypropylene carbonate type polyurethane resin of this embodiment are as follows:

[0044] 1) Dehydrate the polypropylene carbonate glycol and polybutylene adipate glycol;

[0045] 2) Put 450g of dimethylformamide, 3g of antioxidant 1010, 120g of polypropylene carbonate glycol, 228g of polybutylene adipate glycol, and 105g of 1,4-butanediol into the reactor. Stir evenly at 50-55℃;

[0046] 3) Put 420g of diphenylmethane diisocyanate into the reactor in batches, and dilute with 1660.8g of dimethylformamide in batches, strictly control the reaction temperature between 65-70℃, react at normal pressure for 10 hours, after the viscosity is qualified , Add terminator methanol. After the reaction is completed, 11.7 g of the anti-sticking and stripping aid is added and stirred uniformly to obtain the polypropylene carbonate type polyurethane resin o...

Embodiment 2

[0048] The raw materials and weights used in this example are shown in Table 2 below.

[0049] Table 2

[0050]

[0051] The preparation steps of the polypropylene carbonate type polyurethane resin of this embodiment are as follows:

[0052] 1) Dehydrate the poly(propylene carbonate) glycol, poly(butylene adipate glycol) and poly(ethylene glycol adipate butylene glycol) copolyester glycol;

[0053] 2) Combine 450g of dimethylformamide, 3g of antioxidant 245, 300g of polypropylene carbonate glycol, 360g of polybutylene adipate glycol, and 60g of polyethylene adipate butylene glycol. Put polyester diol and 15g ethylene glycol into the reactor, stir well at 55-60℃;

[0054] 3) Put 240.6g of diphenylmethane diisocyanate into the reactor in batches, and dilute with 1063.2g of dimethylformamide and 504.6g of methyl ethyl ketone in batches, strictly control the reaction temperature between 70-75℃, and react under normal pressure After 12 hours, the viscosity is qualified, add the terminator ...

Embodiment 3

[0056] The raw materials and weights used in this example are shown in Table 3 below.

[0057] table 3

[0058]

[0059] The preparation steps of the polypropylene carbonate type polyurethane resin of this embodiment are as follows:

[0060] 1) Dehydrate the polypropylene carbonate glycol and polybutylene adipate glycol;

[0061] 2) Put 450g of dimethylformamide, 6g of antioxidant 1010, 240g of polypropylene carbonate glycol, 360g of polybutylene adipate glycol, and 36g of ethanolamine into the reactor, stir well at 55-60℃ ;

[0062] 3) Put 267.6g of diphenylmethane diisocyanate into the reactor in batches, and dilute with the remaining dimethylformamide, toluene, and methyl ethyl ketone in batches, strictly control the reaction temperature between 80-85℃, and react at normal pressure for 12 When the viscosity is qualified after hours, add the terminator methanol. After the reaction is completed, 0.9 g of anti-sticking agent is added and stirred uniformly to obtain the polypropylene ...

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Abstract

The invention discloses polypropylene carbonate type polyurethane resin. The polypropylene carbonate type polyurethane resin is composed of the following components in parts by weight: 4-10 parts of polypropylene carbonate glycol, 7-14 parts of polyhydric alcohol, 0.5-3.5 parts of a chain extender with the molecular weight of less than 150, 6-14 parts of diisocyanate, 0.04-0.06 part of a terminating agent, 0-2 parts of an additive, 0.1-1 part of an antioxidant and 64-71 parts of a solvent. The invention further provides a preparation method of the resin and an application of the resin in a synthetic leather dry-method process field. With the adoption of the formula composition of the polypropylene carbonate type polyurethane resin, the polyurethane resin and synthetic leather prepared from the polyurethane resin have an excellent heat-resisting performance, but also have an excellent hydrolysis resistance effect. Furthermore, not only can the requirements on petrochemical raw materials be reduced, but also the effective utilization of carbon dioxide is also realized.

Description

Technical field [0001] The invention relates to a polyurethane resin and a preparation method and application thereof, in particular to a polypropylene carbonate type polyurethane resin and a preparation method and application thereof. Background technique [0002] Polyurethane synthetic leather is an ideal material to replace natural leather. Because of its uniqueness, it has been widely used in clothing, shoe leather, luggage, and automobiles. With the improvement of people's living standards, the market's quality requirements for polyurethane synthetic leather have also increased, and products with high physical properties and differentiated products have gradually become popular products. [0003] At present, the hydrolysis-resistant polyurethane resin stands out due to its excellent hydrolysis resistance and long product life. It has gradually attracted wide attention from the industry and has a trend to occupy the future market. The following Chinese patents or patent applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/44C08L75/04D06N3/14
CPCC08G18/4018C08G18/4202C08G18/44C08G18/6607C08G18/664C08G18/6655D06N3/146
Inventor 杨银龙蒋红梅唐劲松孙向浩吴勇
Owner SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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