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

Non-yellowing polyurethane sponge and preparation method thereof

A technology of polyurethane sponge and isocyanate, applied in the field of polyurethane foam, can solve the problem of yellowing of the sponge, and achieve the effect of avoiding yellowing

Pending Publication Date: 2021-03-02
杭州崇耀科技发展有限公司
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even so, there is still a problem of yellowing of the sponge during the thermoforming process

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
  • Non-yellowing polyurethane sponge and preparation method thereof
  • Non-yellowing polyurethane sponge and preparation method thereof
  • Non-yellowing polyurethane sponge and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] The present invention also provides a method for preparing the above-mentioned non-yellowing polyurethane sponge, comprising: mixing the first polyether polyol, the second polyether polyol, water, an amine catalyst, a foam stabilizer and a physical foaming agent Stir for the first time, then add isocyanate for the second time, heat and dry to obtain non-yellowing polyurethane sponge.

[0054] The present invention does not have special limitation to the source of all raw materials, can be commercially available; The first polyether polyol, the second polyether polyol, water, amine catalyst, foam stabilizer, physical foaming agent and The isocyanates are all the same as described above and will not be repeated here.

[0055] Mix the first polyether polyol, the second polyether polyol, water, amine catalyst, foam stabilizer and physical blowing agent for the first stirring to obtain component A; the first stirring speed Preferably it is 1000-1500r / min; the time for the f...

Embodiment 1

[0068] The formula of polyurethane sponge is:

[0069]

[0070] Mix the first polyether polyol, the second polyether polyol, water, an amine catalyst and a foam stabilizer and stir at 1000r / min for 45s, then add isocyanate and stir at a high speed of 2500r / min for 7s to obtain a polyurethane blend.

[0071] Sponge bra molds (see figure 1 and figure 2 , which is a picture of a sponge bra mold) heated to 60°C, coated with oil-based release agent LK 706 provided by Evonik, then put the sponge bra mold into a heating and drying oven, and kept the temperature at 60°C, and the polyurethane prepared from the above formula The blend is poured into a sponge bra mold, the mold is covered, placed in a heating and drying oven, kept warm for 8 minutes, and demolded to obtain a bra cup with fine cells and a smooth surface.

Embodiment 2

[0073] The formula of polyurethane sponge is:

[0074]

[0075] According to the production process of Example 1, a bra cup body with fine cells and smooth surface is obtained.

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

PropertyMeasurementUnit
densityaaaaaaaaaa
lengthaaaaaaaaaa
elongation at breakaaaaaaaaaa
Login to View More

Abstract

The invention provides a non-yellowing polyurethane sponge. The non-yellowing polyurethane sponge is formed by a component A and a component B, wherein the component A comprises the following components in parts by weight: 70-90 parts of first polyether polyol; 10-30 parts by weight of second polyether polyol; 1.5-4 parts by weight of water; 1-3 parts by weight of an amine catalyst; 1-3 parts by weight of a foam stabilizer; and 0-10 parts by weight of a physical foaming agent; the component B comprises the following components in parts by weight: 50-150 parts of isocyanate; wherein the number-average molecular weight of the first polyether polyol is 5000 to 6000; and the number-average molecular weight of the second polyether polyol is 1000 to 3000. Compared with the prior art, the low-molecular-weight polyether polyol is used as the pore-opening agent and is combined with the amine catalyst, so that the first polyether polyol can be formed by casting, the phenomenon that the sponge becomes yellow in the processing and using processes is avoided, a brightening agent, an antioxidant and the like are not added, and fabrics cannot be polluted.

Description

technical field [0001] The invention belongs to the technical field of polyurethane foaming, and in particular relates to a non-yellowing polyurethane sponge and a preparation method thereof. Background technique [0002] Polyurethane sponge is a kind of polyurethane foam, which belongs to soft polyurethane foam. It is widely used in clothing, packaging, automobiles, and aviation because of its advantages such as low density, good elasticity, good air permeability, good water resistance and easy availability of raw materials. , furniture and other fields. [0003] At present, most sponge manufacturers still use aromatic isocyanates such as toluene diisocyanate (TDI) and diphenylmethane diisocyanate (MDI) as raw materials. Since the isocyanate in TDI and MDI is directly connected based on the benzene ring, long-term exposure to light, nitrogen and oxygen The environment of the compound is easy to cause yellowing and decline in physical and mechanical properties. [0004] Mo...

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): C08G18/75C08G18/48C08J9/14C08G101/00
CPCC08G18/755C08G18/4816C08G18/4837C08J9/145
Inventor 蒋卫民黄卓吴鸳杨雪忠汪瑜华王建雄王康邵斌徐建良林俊智
Owner 杭州崇耀科技发展有限公司
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