Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ultra-low-hardness polyurethane rubber material for printing rubber roller and preparation method thereof

A technology of polyurethane rubber and printing rubber rollers, applied in the field of rubber, can solve problems such as unsatisfactory use requirements, increased hardness of rubber rollers, and reduced performance of rubber rollers, and achieve good resilience, low Shore A hardness, and convenient defoaming.

Inactive Publication Date: 2018-05-04
TIANJIN RUBBER IND RES INST
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of making low-hardness polyurethane rubber rollers, in order to reduce the hardness, a large amount of plasticizers will be added to the formula, but if too much plasticizer is added, it will not only significantly reduce the performance of the rubber rollers, but also increase the plasticity during use. The agent will be extracted by the solvent in the ink, which will greatly increase the hardness of the rubber roller, which cannot meet the requirements of use.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The formulation of ultra-low hardness polyurethane rubber material for printing rollers:

[0036] Hydroxyl-terminated polybutadiene HTPB, about Mn4000: 100 parts

[0037] Isophorone diisocyanate IPDI: 16 parts

[0038] 3# white oil: 20 parts

[0039] Dimethylthiotoluenediamine DMTDA: 2.5 parts

[0040] Hydroxyl-terminated polybutadiene HTPB, about Mn2000: 60 parts

[0041] Defoamer BYK-1794: 1 part

[0042] February dibutyltin silicate T-12: 0.1 parts,

[0043] The preparation method of ultra-low hardness polyurethane rubber material for printing rubber roller: taking the small-scale and traditional manual pouring molding method in the laboratory as an example,

[0044] 1. Dehydration of hydroxyl-terminated polybutadiene HTPB:

[0045] Put the beaker containing HTPB with a molecular weight of about 4000 on the electric furnace and stir evenly to heat it. Use a temperature controller to control the temperature at 105±3°C. After the temperature of HTPB reaches 105°C...

Embodiment 2

[0053] The formulation of ultra-low hardness polyurethane rubber material for printing rollers:

[0054] Hydroxyl-terminated polybutadiene HTPB, about Mn4000: 100 parts

[0055] isophorone diisocyanate (IPDI): 16 parts

[0056] 3# white oil: 20 parts

[0057] Dimethylthiotoluenediamine DMTDA: 4.6 parts

[0058] Hydroxyl-terminated polybutadiene HTPB, around Mn2000: 40.8 parts

[0059] Defoamer BYK-1794: 0.5 parts

[0060] February dibutyltin silicate T-12: 0.1 parts,

[0061] Preparation method of ultra-low hardness polyurethane rubber material for printing rubber roller:

[0062] 1. Dehydration of hydroxyl-terminated polybutadiene HTPB:

[0063] Put the beaker containing HTPB with a molecular weight of about 4000 on the electric furnace and stir evenly to heat it. Use a temperature controller to control the temperature at 105±3°C. After the temperature of HTPB reaches 105°C, keep it warm for 5 minutes, then place the beaker in a closed container for pumping. Vacuum dehyd...

Embodiment 3

[0071] The formulation of ultra-low hardness polyurethane rubber material for printing rollers:

[0072] Hydroxyl-terminated polybutadiene HTPB, about Mn4000: 100 parts

[0073] Isophorone diisocyanate IPDI: 18 parts

[0074] 3# white oil: 20 parts

[0075] Dimethylthiotoluenediamine DMTDA: 6 parts

[0076] Hydroxyl-terminated polybutadiene HTPB, about Mn2000: 45.5 parts

[0077] Defoamer BYK-1794: 0.5 parts

[0078] February dibutyltin silicate T-12: 0.1 parts,

[0079] Preparation method of ultra-low hardness polyurethane rubber material for printing rubber roller:

[0080] 1. Dehydration of hydroxyl-terminated polybutadiene HTPB:

[0081] Put the beaker containing HTPB with a molecular weight of about 4000 on the electric furnace and stir evenly to heat it. Use a temperature controller to control the temperature at 105±3°C. After the temperature of HTPB reaches 105°C, keep it warm for 5 minutes, then place the beaker in an airtight container Vacuum dehydration, the v...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an ultra-low-hardness polyurethane rubber material for a printing rubber roller and a preparation method, and belongs to the field of rubber. Hydroxyl-terminated polybutadiene(HTPB) macromolecular polyol of about 4,000 in molecular weight is taken as a primary material in the polyurethane rubber material, isophorone diisocyanate (IPDI) is taken as a crosslinking agent in the polyurethane rubber material, HTPB of about 2,000 in molecular weight and dimethyl thio-toluene diamine (DMTDA) are taken as chain extenders in the polyurethane rubber material. The ultra-low-hardness polyurethane rubber material for printing rubber rollers of different performances is made by a prepolymer method, and has ultralow shore A hardness and high elasticity.

Description

technical field [0001] The invention belongs to the field of rubber, in particular to an ultra-low hardness polyurethane rubber material for printing rubber rollers and a preparation method thereof. Background technique [0002] In the printing industry, rubber rollers are one of the most important supporting parts in printing equipment, and high-quality printing rubber rollers are the basic conditions for producing high-quality printed matter. At present, the types of rubber rollers produced domestically in the printing industry include nitrile rubber rubber rollers and polyurethane rubber rollers. For printing patterns on the surface of uneven objects, printing rubber rollers with ordinary hardness cannot meet the requirements because they are too hard to fully contact with the surface of uneven objects. This requires the hardness of the printing rubber roller to be less than 30 degrees of Shore A, or even below 20 degrees of Shore A, in order to print high-quality patter...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G18/75C08G18/69C08G18/65C08G18/32C08G18/10
CPCC08G18/10C08G18/69C08G18/755C08G18/3876C08G18/6594
Inventor 苗志军袁建安张景亮
Owner TIANJIN RUBBER IND RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com