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Organic silicon leveling aid for polyurethane and preparation method thereof

A leveling aid and silicone technology, applied in the field of silicone leveling aid for polyurethane and its preparation, can solve the problems of poor leveling of polyurethane resin, opaque polyurethane resin, etc., and achieve good leveling performance and compatibility of the system High, system transparency effect

Active Publication Date: 2022-02-08
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large difference in polarity between the organic silicon monomer and the system, the free organic silicon monomer is easy to precipitate, resulting in problems such as opaque polyurethane resin and poor leveling of polyurethane resin during post-processing and use.

Method used

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  • Organic silicon leveling aid for polyurethane and preparation method thereof
  • Organic silicon leveling aid for polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Heat 80 parts of silicone oil (molecular weight: 2200) to 100°C, vacuum dehydrate for about 1 hour, and cool down to 50°C; add 18.2 parts of diphenylmethane diisocyanate to the reaction kettle, stir evenly, heat up to 65°C, and react for about 3 hours Add 100 parts of dimethylformamide and stir evenly, then add 3.7 parts of ethylene glycol, and react for 2 hours at 65°C; add 410 parts of dimethylformamide and 200 parts of methyl ethyl ketone to the above reaction kettle The solid content of the system is 12.55%, and the viscosity reaches 0.43Pa.s / 25°C to obtain the silicone leveling aid.

Embodiment 2

[0025] Heat 80 parts of silicone oil (molecular weight: 2200) to 100°C, vacuum dehydrate for about 1 hour, and cool down to 50°C; add 18.2 parts of diphenylmethane diisocyanate to the reaction kettle, stir evenly, heat up to 65°C, and react for about 3 hours ; Add 105 parts of dimethylformamide and stir evenly, then add 5.3 parts of 1,4-butanediol, and react for 2 hours at 65°C; add about 415 parts of dimethylformamide to the above reaction kettle, 200 Parts of methyl ethyl ketone, so that the solid content of the system is 12.57%, and the viscosity reaches 0.37Pa.s / 25°C, and the silicone leveling aid is obtained.

Embodiment 3

[0027] Heat 80 parts of silicone oil (molecular weight: 1800) to 100°C, vacuum dehydrate for about 1 hour, then cool down to 50°C; add 22.3 parts of diphenylmethane diisocyanate to the reaction kettle, stir evenly, heat up to 65°C, and react for about 3 hours ; Add 110 parts of dimethylformamide and stir evenly, then add 6.5 parts of 1,4-butanediol, and react for 2 hours at 65°C; add about 450 parts of dimethylformamide to the above reaction kettle, 200 Butanone, the solid content of the system is 12.53%, the viscosity reaches 0.34Pa.s / 25℃, and the organic silicon leveling aid is obtained.

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Abstract

The invention discloses an organic silicon leveling aid for polyurethane and a preparation method thereof. The organic silicon leveling aid is prepared from the following components in parts by mass: 15-25 parts of diisocyanate, 80-110 parts of organic silicone oil, 3-10 parts of a micromolecular polyol chain extender, 510-600 parts of a strong-polarity organic solvent and 200-300 parts of a weak-polarity organic solvent. According to the invention, the organic silicone oil is mixed with the diisocyanate and the micromolecular polyol chain extender for chemical reaction, and the organic silicone oil is modified by a chemical modification method, so that the reaction activity and compatibility of the organic silicone oil and a polyurethane system are improved, the activity of the organic silicone oil is equivalent to that of polyether polyol and polyester polyol, and when polyurethane is prepared from the organic silicone oil, polyether polyol and polyester polyol, no free organic silicon monomer exists, and the prepared polyurethane / organic silicon system is high in compatibility, high in transparency and good in leveling performance.

Description

technical field [0001] The invention belongs to the field of polyurethane synthetic leather processing, and in particular relates to a silicone leveling aid for polyurethane and a preparation method thereof. Background technique [0002] When polyurethane resin is used in synthetic leather dry-laid surface layer or surface finishing agent, silicone additives are usually added to improve the product's hand feel, anti-sticking, hydrolysis resistance, wear resistance, leveling performance, etc. The way of adding is generally to add silicone additives to polyurethane resin through physical mixing. Due to the poor compatibility between silicone and polyurethane resin, simple physical mixing will lead to the precipitation of silicone, causing product surface In addition, the poor compatibility of polyurethane resin and silicone will also cause side effects such as whitening of the polyurethane resin film and decreased gloss, which will affect the appearance of the product. It is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/61C08G18/65C08G18/32C08G18/10C09D7/47
CPCC08G18/10C08G18/6511C08G18/61C09D7/47C08G18/3206
Inventor 田海英武春余姚克俭吴兴保
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL