Hard hydrolysis-resistant, low-pitting performance and strong-peel strength polyurethane resin and preparation method thereof

A polyurethane resin, hydrolysis-resistant technology, applied in coatings, textiles and papermaking, etc., can solve the problems of poor quality stability of finished leather, inability to guarantee peel strength and hydrolysis resistance, soft hand feeling, etc., to improve physical properties, The effect of high-grade product and improvement of physical properties

Inactive Publication Date: 2015-02-18
HEFEI ANLI POLYURETHANE NEW MATERIAL
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The peel strength and hydrolysis resistance of the medium modulus resin can meet the requirements, but the quality stability of the finished leather is not good, and the handle is soft
However, high-modulus hydrolysis-resistant high-peeling resins are rarely available in the market, and often only improve the handle of finished leather, but cannot guarantee the stability of peeling strength and hydrolysis resistance.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hard hydrolysis-resistant, low-pitting performance and strong-peel strength polyurethane resin and preparation method thereof
  • Hard hydrolysis-resistant, low-pitting performance and strong-peel strength polyurethane resin and preparation method thereof
  • Hard hydrolysis-resistant, low-pitting performance and strong-peel strength polyurethane resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Raw materials used in this embodiment and their proportioning ratio are shown in Table 1:

[0046] Table 1. Embodiment 1 raw material and proportioning

[0047] DMF

4000 copies

PC-2000

190 copies

SP-1000

380 copies

SP-2400

360 copies

PPG-2

320 copies

EG

370 copies

I-1010

3 copies

MDI

1000 copies

catalyst

0.2 parts

Additional MDI

688 copies

Additional DMF

1180 copies

Terminator

0.8 parts

[0048] Solid content

39％

[0049] The preparation process of the hard hydrolysis-resistant low-porosity high-stripping polyurethane resin in this embodiment is as follows:

[0050] Add macromolecular diols PC-2000, SP-1000, SP-2400, PPG-2, EG and antioxidant I-1010 into 4000 parts of solvent DMF, stir evenly, add 1000 parts of MDI and react at about 70°C for 2 Hours, add a catalyst to accelerate the reaction, keep the temper...

Embodiment 2

[0052] Raw materials used in this embodiment and their proportioning ratio are shown in Table 2:

[0053] Table 2. Embodiment 2 raw materials and proportioning

[0054] DMF

4100 copies

PC-2000

200 copies

SP-1000

400 copies

SP-2400

300 copies

PTMG-1

400 copies

EG

360 copies

I-1010

3 copies

MDI

1000 copies

catalyst

0.3 parts

Additional MDI

708 copies

Additional DMF

1996 copies

Terminator

1.2 parts

Solid content

36％

[0055] The preparation process of the hard hydrolysis-resistant low-porosity high-stripping polyurethane resin in this embodiment is as follows:

[0056] Add macromolecular diols PC-2000, SP-1000, SP-2400, PTMG-1, EG and antioxidant I-1010 into 4100 parts of solvent DMF, stir well, add 1000 parts of MDI and react at about 70 °C for 2 Add an appropriate amount of catalyst to accelerate the reaction, keep the tempera...

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 hard hydrolysis-resistant, low-pitting performance and strong-peel strength polyurethane resin and a preparation method thereof. The preparation method is characterized by comprising the following steps of adding an organic solvent, macromolecular dihydric alcohol, a chain extender, an antioxidant and a part of isocyanate into a reaction kettle according to a proportion, performing reaction for 1 to 2 hours under 60 to 80 DEG C and normal pressure, adding an organic tin or bismuth catalyst, preserving heat, feeding the residual isocyanate in batches into the reaction kettle, supplementing the organic solvent in batches according to the viscosity condition of a reaction system until the viscosity of a product is 80 to 120Pa.s/25 DEG C, and finally adding a reaction termination agent to obtain a hard hydrolysis-resistant, low-pitting performance and strong-peel strength polyurethane resin product with solid content of 35 to 40 percent. The prepared resin is applied to the production of synthetic leather, and a produced leather product has a solid hand-feel, high hydrolysis resistance and low pitting performance.

Description

technical field [0001] The invention relates to a functional polyurethane resin and a preparation method thereof, in particular to a hard hydrolysis-resistant, low-porosity, high-peeling polyurethane resin and a preparation method thereof. Background technique [0002] With the development of the market and technology, the requirements for the physical properties of polyurethane synthetic leather are getting higher and higher, and there is an urgent need for a high-stripping polyurethane wet-process resin that is hard, hydrolysis-resistant and low-porosity. The peel strength and hydrolysis resistance of the medium modulus resin can meet the requirements, but the quality stability of the finished leather is not good, and the handle is soft. However, high-modulus hydrolysis-resistant high-peeling resins are rarely available in the market, and often only improve the handle of finished leather, but cannot guarantee the stability of peeling strength and hydrolysis resistance. Th...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/44C08G18/48C08G18/32C08K5/134D06N3/14
CPCC08G18/3206C08G18/4018C08G18/4211C08G18/4238C08G18/44C08G18/4825C08G18/4854C08G18/6607C08G18/664C08G18/6674C08G2110/0025D06N3/146D06N2203/068D06N2205/045D06N2211/28
Inventor 张彪李震尹凯凯吴兴保田海英李晓飞杜东旭武春余
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap