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

Pulsed electron beam polymerization

An electron beam, pulsed technology used in the field of polymerizing monomers and/or oligomers to achieve short residence times, low cost, and practical productivity

Inactive Publication Date: 2005-06-29
3M INNOVATIVE PROPERTIES CO
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

e-beam is mainly used for crosslinking purposes

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
  • Pulsed electron beam polymerization
  • Pulsed electron beam polymerization
  • Pulsed electron beam polymerization

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0183] Example 1 illustrates the effect of dose per pulse on the total dose necessary to obtain an extrapolated conversion of about 97%.

[0184] Pressure-sensitive adhesive samples were prepared using Paste A by pulsed electron beam irradiation at 0 °C. The pulse source used in sample A is PYXIS source, and the pulse source used in samples B-P is NSRC source. Pulse frequency and dose per pulse are varied and total dose is calculated.

[0185] The percent conversion was measured for each coated sample. The extrapolated conditions for a conversion of about 97% are reported in Table 1.

[0186] Example

[0187]As shown in Table 1 and illustrated in Figure 3, the dose required to achieve approximately 97% conversion increases almost linearly with dose per pulse at all pulse frequencies. The loss of energy efficiency with increasing dose per pulse is more pronounced at high pulse frequencies. The increase in the total dose required to achieve about 97% conversion was...

example 2

[0192] Example 2 illustrates the effect of low dose per pulse and high dose rate on the ability to obtain about 97% conversion.

[0193] Samples for Example 2 were prepared as in Example 1 using various pulse frequencies and doses per pulse from both sources. The process variables and resulting dosage values ​​necessary to obtain a polymerized pressure sensitive adhesive coating with about 97% conversion are shown in Table 3.

[0194] Example

[0195] As shown in Table 3 and illustrated in Figure 4, using a modified slurry similar to that used in Example 1, a conversion of about 97% was obtained with a high dose rate and a low dose per pulse. Consistent with the results of Example 1, the above results illustrate that the total dose required for high conversion increases as the pulse frequency increases. However, with increasing pulse frequency, the loss of conversion efficiency is significantly reduced when the pulse frequency is increased beyond 500-600 pps, especi...

Embodiment 3

[0197] Example 3 illustrates the effect of pulse conditions on the irradiation time required to obtain about 97% conversion.

[0198] Samples 3D, 3F, 3H, 3R and 3X of Example 3 were prepared as in Example 1 using various pulse frequencies and doses per pulse. The remaining samples are the same as in Examples 1 and 2 according to the reference numerals. The pulse source for sample U was the PYXIS source and the pulse source for samples A-T and V-AA was the NSRC source. The process variables necessary to obtain a polymerized pressure sensitive adhesive coating with a conversion of about 97% are shown in Table 4.

[0199] Example

[0200] Comparative samples were prepared by successively irradiating the prepared samples from one of the two slurries at different dose rates. Both slurry A (88:12) and slurry B (90:10) were used. The irradiation conditions and compositions are shown in Table 5.

[0201] Example

[0202] The data in Tables 4 and 5, shown in Fig...

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
peel strengthaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

Described is a polymerization method comprising: providing a substrate; coating at least a portion of said substrate with a polymerizable composition; providing an electron beam that is capable of producing pulses of accelerated electrons; and irradiating said polymerizable composition with said pulses of accelerated electrons to polymerize said polymerizable composition. Under certain conditions, the polymerization takes place heterogeneously.

Description

field of invention [0001] The present invention generally relates to methods of polymerizing monomers and / or oligomers. The present invention more particularly relates to methods of polymerizing monomers and / or oligomers using accelerated electron pulses from an electron beam source. Background of the invention [0002] Polymers in general, and pressure sensitive adhesives in particular, are required to meet increasingly stringent performance limits and application requirements dictated by manufacturing specifications (eg, polymerization with minimal use of environmentally damaging solvents). [0003] For certain applications, such as pressure sensitive adhesive applications, polymers need to have high tensile strength and elongation properties only achievable with high molecular weight lengths between crosslinks. Polymers with high molecular weight between crosslinks also provide the necessary balance of viscosity and elastic properties required for pressure sensitive adhe...

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): B05D3/06C08F2/00C08F2/46C08F2/54C08F20/18C08F22/10C09J4/00
CPCB05D3/068C08F2/54C08F20/18C08F22/1006
Inventor 道格拉斯E·韦斯道格拉斯·S·邓恩罗伊·G·施莱默
Owner 3M INNOVATIVE PROPERTIES CO
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