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Modified collagen fiber and its preparing process

A technology for skin collagen and fiber, applied in the field of modified skin collagen fiber and its preparation, can solve the problem of inability to undergo chemical reaction, and achieve the effects of reducing chromium pollution, less chromium dosage, and clear water bath

Inactive Publication Date: 2005-10-19
成都高新区深博新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a chemical modifier of collagen fibers, glyoxylic acid can only be chemically grafted with amino side groups on collagen fibers; , mercapto, etc. cannot undergo chemical reactions

Method used

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  • Modified collagen fiber and its preparing process
  • Modified collagen fiber and its preparing process
  • Modified collagen fiber and its preparing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1.1 Add 100 kg of pickled natural pigskin collagen fibers, 1 kg of epoxy succinic acid, 0.1 kg of salicylic acid, and 0.2 kg of tetramethylammonium chloride into the drum, and adjust the pH to 2.8 to 3.2 with acid and alkali , reacted at a temperature of 25°C for 1 hour to obtain epoxysuccinic acid modified pigskin collagen fibers, the reaction formula is as follows:

[0030] 1) Reaction of succinic acid with amino groups on collagen fibers

[0031]

[0032] 2) Reaction of succinic acid with phenolic hydroxyl groups on collagen fibers

[0033]

[0034] 3) Reaction of succinic acid with hydroxyl groups on collagen fibers

[0035]

[0036] 4) Reaction of succinic acid with mercapto groups on collagen fibers

[0037]

[0038] 5) Reaction of succinic acid with guanidine groups on collagen fibers

[0039]

[0040] 1.2 Tanning

[0041] Add 4.5 kg of chromium powder in the drum, and continue to rotate for 2 hours. If the wet blue skin cutting process is adop...

Embodiment 2

[0043] 2.1 Add 100 kg of natural cowhide collagen fiber after pickling, 1.2 kg of epoxy glutaric acid, 0.1 kg of salicylic acid, and 0.2 kg of tetramethylammonium chloride into the drum, adjust the pH to 3.0 with acid and alkali, and The reaction was carried out at 25°C for 2 hours to obtain epoxyglutaric acid-modified bovine collagen fibers, and the reaction principle was the same as in Example 1.

[0044] 2.2 Tanning

[0045] Add 4.5 kg of chromium powder into the above-mentioned drum, continue to rotate for 1.5 hours, add baking soda to extract alkali, and slowly raise the pH value to about 4.0, add 60-70°C hot water to 200% liquid ratio after half an hour, and turn Stop the drum for 6 hours overnight, and turn it on for 0.5 hours in the next morning to exit the drum. The temperature of the drum exit is ≥ 42 ° C, and the measured shrinkage temperature is > 110 ° C. The subsequent processes such as neutralization, dyeing and fatliquoring are operated according to conventiona...

Embodiment 3

[0047] 3.1 Add 100 kg of pickled natural sheepskin collagen fibers, 1.5 kg of epoxy sebacic acid, 0.1 kg of salicylic acid, and 0.3 kg of tetramethylammonium chloride into the drum, adjust the pH to 2.8 with acid and alkali, and Rotating reaction at 25°C for 1.5 hours to obtain epoxy sebacic acid modified sheepskin collagen fibers, the reaction principle is the same as in Example 1.

[0048] 3.2 Tanning

[0049] Add 4.5 kg of chromium powder into the above drum, continue to rotate for 1.5 hours, add sodium bicarbonate to extract alkali, and slowly raise the pH value to about 3.9, add 60-70°C hot water to 200% liquid ratio after half an hour, and rotate Stop the drum for 3 hours overnight, turn the drum for 0.5 hours in the next morning, and leave the drum at a temperature ≥ 42°C. After standing for 24 hours, the measured shrinkage temperature is > 110°C. The subsequent processes such as neutralization, dyeing and fatliquoring follow the conventional method operate.

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Abstract

A process for preparing the modified dermal collagenous fibre includes such steps as proportionally adding the acid-immersed dermal collagenous fibres, binary epoxy fatty acid and catalyst into drum, regulating pH=2.0-6.2, and reacting at 20-45 deg.C for 1-2.5 hr. Its tanning method features that the Cr powder and leather are proportionally adding into same drum for tanning the leather. Its advantages are less consumption of Cr salt, high tanning effect, and high quality and output rate of finished leather.

Description

1. Technical field [0001] The invention relates to a modified skin collagen fiber and a preparation method thereof, belonging to the fields of chemical modification of skin collagen and leather tanning. 2. Background technology [0002] The traditional leather chromium salt tanning method is to form a metal organic chromium compound through the carboxyl side groups of cystine and arginine on the collagen fiber and basic chromium sulfate to realize the absorption, fixation and tanning of chromium. However, the carboxyl side groups on natural collagen fibers are very limited, accounting for about 20% of the total active side groups of collagen fibers, and the chromium salts that actually form chromium compounds with skin collagen are also very limited, and most of the chromium salts are filled in the form of deposition. in leather. The amount of chromium salt used in traditional chrome tanning is greatly excessive, and the binding fastness between the carboxyl side groups of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/30
Inventor 汤嘉陵
Owner 成都高新区深博新材料有限公司
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