Low-hardness polyurethane self-skinning composition for printing rubber roll and preparation method for composition

A printing rubber roller and low-hardness technology, which is applied in the field of low-hardness polyurethane self-skinning composite materials for printing rubber rollers and its preparation, can solve the problem of insufficient contact with uneven object surfaces, failure to meet the use requirements, and increased hardness of rubber rollers, etc. problem, to achieve the effect of wide adjustable range of hardness, good impact resistance, and easy production

Inactive Publication Date: 2015-10-21
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the polyurethane rubber rollers in the domestic printing industry use elastomer materials, and the hardness range is 30-70 degrees of Shore A. However, in some special printing industries, such as printing patterns on the surface of uneven objects such as soft shoe materials and wood, etc. , printing rubber rollers with ordinary hardness cannot meet the requirements because they are too hard to fully contact with the uneven surface
This requires the hardness of the printing rubber roller to be less than 30 degrees Shore A, or even less than 20 degrees Shore A, in order to print high-quality patterns on the surface of uneven objects. In addition, in the process of making low-hardness polyurethane rubber rollers, in order to To reduce the hardness, a large amount of plasticizer will be used, but adding too much plasticizer will not only significantly reduce the performance of the rubber roller, but also during use, the plasticizer will migrate to the surface of the rubber roller with the ink, making the rubber roller harder The amplitude has increased, which cannot meet the requirements of use

Method used

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  • Low-hardness polyurethane self-skinning composition for printing rubber roll and preparation method for composition
  • Low-hardness polyurethane self-skinning composition for printing rubber roll and preparation method for composition
  • Low-hardness polyurethane self-skinning composition for printing rubber roll and preparation method for composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Component A is made of the following raw materials in parts by mass:

[0032]

[0033] Component B is made from the following raw materials in parts by mass:

[0034]

[0035] A component: Weigh 80kg of FA703, 10kg of KE880S into the reactor and stir, then add 0.5kg of DC2525, 2kg of ethylene glycol, 5kg of SD-75, 2kg of NE300, 0.5kg of H 2 O, after stirring and mixing at room temperature for 0.5 hours, the rotation speed is 50 rpm, and the product of component A is obtained.

[0036] Component B: Take 25kg KE810 and place it in a reaction kettle, raise the temperature to 110°C and dehydrate under vacuum (-0.09MPa) for 1.5 hours, then cool down to 50°C, add 25kg 44C, 25kg CD-C, heat up to 75°C and keep it warm for reaction 1 hour, then add 25kgPM200, stir for 0.5 hours, take a sample and test, the mass content of -NCO reaches 22.8±0.2%, cool down to 40°C and discharge, sealed and stored.

[0037] The required rubber roller mold is wiped with a release agent (a c...

Embodiment 2

[0040] Component A is made of the following raw materials in parts by mass:

[0041]

[0042] Component B is made from the following raw materials in parts by mass:

[0043]

[0044] Component A: Weigh 75kg of FA703, 15kg of KE880S into the reactor for stirring, then add 1.0kg of DC2525, 1kg of ethylene glycol, 4kg of SD-75, 3kg of NE300, 1.0kg of H 2 O, after stirring and mixing at room temperature for 0.5 hours, the product of component A is obtained.

[0045] Component B: Take 15kg KE810 and place it in a reaction kettle, heat up to 100°C and dehydrate under vacuum (-0.09MPa) for 2 hours, then cool down to 40°C, add 35kg 44C, 30kg CD-C, slowly heat up to 70°C and keep it warm React for 1 hour, then add 20kgPM200, stir for 0.5 hours, take a sample and test, the mass content of -NCO reaches 26.4±0.2%, cool down to 40°C, discharge, and seal for storage.

[0046] Wipe the mold release agent (conventional commercially available mold release agent) on the required rubber ...

Embodiment 3

[0049] Component A is made of the following raw materials in parts by mass:

[0050]

[0051] Component B is made from the following raw materials in parts by mass:

[0052]

[0053] Component A: Weigh 85kg of FA703, 5kg of KE880S into the reactor and stir, then add 0.7kg of DC2525, 3kg of ethylene glycol, 3kg of SD-75, 2.5kg of NE300, 0.8kg of H 2 O, after stirring and mixing at room temperature for 0.5 hours, the product of component A is obtained.

[0054]Component B: Take 20kg KE810 and place it in a reaction kettle, heat it up to 105°C and dehydrate under vacuum (-0.09MPa) for 1.8 hours, then cool down to 45°C, add 30kg 44C, 25kg CD-C, slowly heat up to 72°C and keep it warm React for 1 hour, then add 25kg PM200, stir for 0.5 hours, take a sample and test, the mass content of -NCO reaches 24.5±0.2%, cool down to 40°C and discharge, sealed and stored.

[0055] Wipe the mold release agent (conventional commercially available mold release agent) on the required rubbe...

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Abstract

The invention belongs to the field of high molecular materials, and particularly relates to a low-hardness polyurethane self-skinning composition for a printing rubber roll and a preparation method for the composition. The composition is prepared by mixing a component A and a component B according to the mass ratio of 100:(30-35), wherein the component A is prepared from polyether polyol, polymer polyol, a chain extender, a foaming agent, a foam stabilizer, a hole opening agent and a catalyst, and the component B is prepared from polyether polyol, pure MDI, liquefied MDI and crude MDI. The prepared composition not only has the advantages of being good in hand feeling, wear resistant, shock resistant, simple and convenient to produce, and the like, but also is compact and smooth in surface and wide in hardness adjustment range. The composition can be used for manufacturing the low-hardness rubber roll in the printing industry, and the printing rubber roll prepared by adoption of the composition is not only relatively low in hardness, but also better in elastic resilience, wear resistance and shock resistance. The invention further provides the preparation method for the composition, and the process is reasonable.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a low-hardness polyurethane self-skinning composite material for printing rubber rollers and a preparation method thereof. Background technique [0002] The rubber roller is one of the most important accessories on the printing machine. It plays the roles of inking, ink distribution, ink transfer, and inking. Its quality directly affects the printing quality. [0003] At present, most of the polyurethane rubber rollers in the domestic printing industry use elastomer materials, and the hardness range is 30-70 degrees of Shore A. However, in some special printing industries, such as printing patterns on the surface of uneven objects such as soft shoe materials and wood, etc. , Ordinary hardness printing rubber rollers cannot meet the requirements because they are too hard to fully contact with the uneven surface of the object. This requires the hardness of the printing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/63C08G18/32C08J9/08C08G101/00
CPCC08G18/3203C08G18/3206C08G18/4072C08G18/4804C08G18/632C08G18/6674C08G18/7664C08G18/7671C08G2110/0083
Inventor 牛富刚孙清峰陈伟郭永生殷玉鹏栾森
Owner SHANDONG INOV POLYURETHANE
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