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Flame retardant leather, preparation method and application

A technology of leather and parts by weight, which is applied in the direction of textiles and papermaking, can solve the problems of halogen flame retardants, deterioration of flame retardant performance, weak force, etc., and achieve widening flame retardant temperature range, large specific surface area, and reduced use volume effect

Active Publication Date: 2019-06-21
XIAMEN XINCHUANGLI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Halogen flame retardants are more harmful and have been gradually eliminated. Non-halogen flame retardants, such as magnesium hydroxide, have good flame retardancy, but they need a large amount to fully play their role. At the same time, with the amount of The increase of the material will deteriorate the mechanical properties and texture of the material
At the same time, the action force of magnesium hydroxide in the leather is weak, and it is easy to lose during the scrubbing process, and its flame retardant performance deteriorates sharply after long-term scrubbing
[0006] At present, there are few flame retardant researches on the environment-friendly leather prepared by organic silica gel, and non-halogen flame retardants used in traditional polyurethane leather have more or less problems, and cannot be directly applied to organic silica gel. Therefore, it is necessary to study the flame retardancy of this type of environmentally friendly leather as a special topic

Method used

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  • Flame retardant leather, preparation method and application
  • Flame retardant leather, preparation method and application
  • Flame retardant leather, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of flame retardant leather top layer:

[0043] Take 80-100 parts of organic silica gel, 8-10 parts of hardener, and 10-30 parts of modified layered double metal hydroxide to form a primary slurry;

[0044] Use 4-9 parts of high-viscosity simethicone oil with a viscosity value of 100-300mPa·s / 25°C to adjust the viscosity of the primary slurry to 100000-120000mPa·s / 25°C to form a secondary slurry;

[0045] Get a certain amount of modified nano-silica and mix it into the secondary slurry to form a third slurry, the parts by weight of the modified nano-silica and the modified layered double metal hydroxide The ratio of parts by weight is not less than 8%, and the ratio of parts by weight of the modified nano-silica to the total parts by weight is not more than 1.9%;

[0046] Coat the three-time slurry on the surface of the release paper / film with a coating thickness of 0.1mm, and then input it into a multi-stage temperature difference oven. The multi-stage temp...

Embodiment 2

[0071] In this embodiment, the modified layered double metal hydroxide used in this application will be described.

[0072] Modified layered double metal hydroxide: sodium stearate and layered double metal hydroxide (neutral pH value) are added to the reaction kettle according to the proportioning of (3-5): 100 parts by weight, at 75- Stir in the temperature range of 85°C for 1 hour, and ultrasonically disperse once at intervals of 10-15 minutes, each time for 3-5 minutes.

[0073] Effect of ratio on activation index:

[0074] Addition amount of sodium stearate 1％ 3％ 5％ 7％ 10％ Activation index 0.23 0.89 0.985 0.987 0.988

[0075] Applicant finds in research, initially along with the increase of sodium stearate, activation index rises sharply, but when sodium stearate increases to about 5% of layered double metal hydroxide content, its activation index tends to When it is stable (close to 1), it continues to increase at this time, and the activati...

Embodiment 3

[0080] Preparation of modified silica: Add a certain amount of propyltrimethylsilane (KH560) into the hydrolyzate and hydrolyze it for 30±5min at a temperature of 70-75°C to obtain a hydrolysis reactant; add a certain amount of nano-silica (10-30nm) Add a certain amount of absolute ethanol, ultrasonically disperse for 10-15min to obtain a dispersion; heat the hydrolyzed reactant and dispersion to 80-85°C in the reactor, stir at constant temperature for 4H, then cool to room temperature, Obtaining the cooling liquid; centrifuging the cooling liquid and drying to constant humidity to obtain modified nano silicon dioxide;

[0081] The hydrolyzate is prepared from ethanol with a volume fraction greater than 75% and hydrochloric acid with a concentration of 0.1mol / L at a volume ratio of 1:1;

[0082] The addition ratio of each material is as follows:

[0083] Propyltrimethylsilane Nano silica Hydrolyzate Absolute ethanol 12-18g 100g 1000mL 500ml

[0084...

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Abstract

The invention discloses a flame retardant leather and a preparation method thereof. According to the flame retardant leather, organic silica gel serves as a main component, modified nano-silica and modified layered double-metal oxide serve as flame retardant factors, the synergy functions of the components such as the synergistic flame retardant function of the flame retardant factors, the bondingfunctions of the modified nano-silica and dimethicone and the synergy function of the high-viscosity dimethicone and the low-viscosity dimethicone are utilized, the process is improved, the flame retardant leather has good flame retardant performance, the mechanical performance and environmental protection requirement of materials are integrated, and therefore the flame retardant leather can meetthe performance requirements of furniture, home decoration and artware leathers and have broad market prospects.

Description

technical field [0001] The invention relates to the field of leather material preparation, in particular to a flame-retardant leather, a preparation method and an application. Background technique [0002] At present, the production processes of artificial leather and synthetic leather at home and abroad are mainly divided into dry polyurethane tanning process, wet polyurethane tanning process and water-based polyurethane process. These methods all will use solvent-based polyurethane resin in the production process, because the solvent-based polyurethane resin contains a large amount of poisonous and harmful chemical solvents such as dimethylformamide (DMF), toluene, methyl ethyl ketone, etc. The human body can cause great harm. [0003] After a lot of research and development work, the applicant has developed an environmentally friendly synthetic leather made of organic silica gel and environmentally friendly auxiliary materials, but has not yet made targeted improvements ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/12D06N3/00
Inventor 陈偲勇许明辉
Owner XIAMEN XINCHUANGLI CHEM CO LTD
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