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Aromatic yellow-stain resistant polyurethane resin for synthetic leather and preparation thereof

A polyurethane resin and aromatic technology, applied in the field of aromatic anti-yellowing polyurethane resin and its synthesis, can solve the problems of low strength, solvent resistance, and yellowing resistance level 4, and achieve high strength, The effect of high wear resistance and excellent yellowing resistance

Active Publication Date: 2009-07-08
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the elements that affect the yellowing of aromatic polyurethane resins are not only the effect of ultraviolet light, but also other factors such as moisture, ozone, nitrides, etc. In the past, simply adding ultraviolet absorber UV-328 could not achieve the yellowing resistance level 4 level, it is necessary to improve the hydrolysis resistance of the formula, and adjust the variety and dosage of UV absorbers at the same time
Although aliphatic resins do not turn yellow, they are not widely used due to their low strength, solvent resistance, and easier degradation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Raw material name Weight (unit: Kg)

[0029] Polyester polyol compound (molecular weight 2000) 110

[0030] Polytetramethylene ether glycol (molecular weight 2000) 100

[0031] Ethylene glycol 22

[0032] 4,4-Diphenylmethane diisocyanate 115

[0033] Phosphoric acid 0.02

[0034] Antioxidant I-1010 0.5

[0035] UV absorber UV-328 3

[0036] Light stabilizer UV-2268 5

[0037] UV absorber JAST-500 1

[0038] N,N-Dimethylformamide 650

[0039] The aromatic anti-yellowing polyurethane resin for synthetic leather of the present invention is prepared according to the following steps:

[0040] 1. Put various polyol compounds and antioxidant I-1010 into the reaction kettle for stirring, heat up to 100°C, vacuum dry and remove water for 1 hour, check that the moisture content is less than 0.1%, then cool down to 30°C.

[0041] 2. Add half of the total amount of N,N-dimethylformamide, phosphoric acid, and ethylene glycol, stir for 20 minutes, and control the temperature...

Embodiment 2

[0045] Raw material name Weight (unit: Kg)

[0046] Polycaprolactone polyol compound (molecular weight 2000) 110

[0047] Polytetramethylene ether glycol (molecular weight 2000) 100

[0048] Ethylene glycol 18

[0049] 1,4-Butanediol 5

[0050] 4,4-Diphenylmethane diisocyanate 112.7

[0051] Phosphoric acid 0.02

[0052] Antioxidant 3114 0.5

[0053] UV absorber UV-328 3

[0054] Light stabilizer UV-2268 5

[0055] UV absorber JAST-500 1

[0056] N,N-Dimethylformamide 650

[0057] The aromatic anti-yellowing polyurethane resin for synthetic leather of the present invention is prepared according to the following steps:

[0058] 1. Put various polyol compounds and antioxidant 3114 into the reaction kettle for stirring, heat up to 100°C, vacuum dry and remove water for 1 hour, check that the moisture content is less than 0.1%, then cool down to 30°C.

[0059] 2. Add half of the total amount of N,N-dimethylformamide, phosphoric acid, ethylene glycol, and 1,4-butanediol, st...

Embodiment 3

[0063] Raw material name Weight (unit: Kg)

[0064] Polyester polyol compound (molecular weight 2000) 80

[0065] Polyether polyol compound (molecular weight 2000) 80

[0066] Polycaprolactone polyol compound (molecular weight 2000) 50

[0067] 1,4-butanediol 30

[0068] 4,4-Diphenylmethane diisocyanate 110

[0069] Phosphoric acid 0.02

[0070] Antioxidant BHT 1

[0071] UV absorber UV-328 3

[0072] Light stabilizer UV-2268 5

[0073] UV absorber JAST-500 1

[0074] N,N-Dimethylformamide 650

[0075] The aromatic anti-yellowing polyurethane resin for synthetic leather of the present invention is prepared according to the following steps:

[0076] 1. Put various polyol compounds and antioxidant BHT into the reactor for stirring, heat up to 100°C, vacuum dry and remove water for 1 hour, check that the moisture content is less than 0.1%, then cool down to 30°C.

[0077] 2. Add half of the total amount of N,N-dimethylformamide, phosphoric acid, and 1,4-butanediol, stir...

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PUM

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Abstract

The invention discloses an aromatic yellowing-proof polyurethane resin for synthetic leather and a preparation method thereof. The aromatic yellowing-proof polyurethane resin comprises the following raw material components: aromatic isocyanate, polylol compound, diol chain extender of which molecular weight is 62 to 500 grams per mol, catalyst, antioxidant, ultraviolet absorbent and solvent. Through adjusting the polylol compound in the polyurethane resin, increasing usage of a polyether polylol compound, improving the hydrolysis resistance of the polyurethane resin, and adjusting variety and dosage of assistants such as antioxidant, ultraviolet absorbent and the like, the yellowing resistance of the synthetic leather prepared by the polyurethane resin can reach a level of more than grade 4.

Description

technical field [0001] The invention relates to a polyurethane resin for synthetic leather, in particular to an aromatic anti-yellowing polyurethane resin and a synthesis method thereof. Background technique [0002] Polyurethane resins used in synthetic leather are basically synthesized from aromatic isocyanates. This is because the polyurethane resin synthesized with aromatic isocyanate has high strength, good wear resistance and good solvent resistance, but because aromatic isocyanate contains benzene ring, under the irradiation of ultraviolet light, the energy of benzene ring absorbing ultraviolet light is prone to isomerization It turns yellow by forming a quinone structure. At the same time, synthetic leather can also absorb moisture in the air, and under the action of ultraviolet rays, accelerate the degradation and isomerization of polyurethane resin, making polyurethane resin more likely to turn yellow. Therefore, the elements that affect the yellowing of aromatic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K5/103C08K5/101C08K5/3492C08K5/3475C08G18/42C08G18/48C08G18/76
Inventor 唐涛惠坚强
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL
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