Unlock instant, AI-driven research and patent intelligence for your innovation.

Vinyl alcohol polymer and method for preparing same

A vinyl alcohol-based and polymer technology, which can be used in the production of silyl-containing vinyl alcohol-based polymers, the manufacture of vinyl alcohol-based polymers, and the fields of coating materials, which can solve the problem of water resistance of films and insufficient stability of aqueous solution viscosity. , Insufficient water resistance of the film, etc.

Inactive Publication Date: 2004-04-14
KURARAY CO LTD
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the silyl group-containing PVA obtained by these methods has: (a) when preparing an aqueous solution of silyl group-containing PVA, if no alkali or acid such as sodium hydroxide is added, the silyl group-containing PVA cannot be made When PVA is dissolved in water, (b) the viscosity stability of the aqueous solution of silyl group-containing PVA is insufficient, (c) the water resistance of the film obtained from the aqueous solution of silyl group-containing PVA is insufficient, and (d) in When forming a film containing silyl group-containing PVA and inorganic substances, it is difficult to satisfy both the adhesive force between silyl group-containing PVA and inorganic substances and the water resistance of the film, etc.
[0007] Proposed a PVA containing a silyl group introducing an ionic hydrophilic group (JP-A-59-182803 Gazette), and then completed a report that PVA with a silanol group on the side chain has a strong interaction with inorganic substances " Journal of the Chemical Society of Japan, 1994, (4), 365-370 ", but even if such modified PVA is utilized, it is difficult to say that the problems of above-mentioned (a)~(d) can be solved

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
  • Vinyl alcohol polymer and method for preparing same
  • Vinyl alcohol polymer and method for preparing same
  • Vinyl alcohol polymer and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 14

[0136] About PVA1-PVA14, the viscosity stability of the PVA aqueous solution, the water resistance of the film containing an inorganic substance, and the adhesive force of PVA and an inorganic substance were evaluated according to the following evaluation method. The results are shown in Table 5.

Embodiment 15

[0181] A 10% aqueous solution of PVA1 was prepared. In addition, silica (Mizusawa Chemical Co., Ltd. make: Mitsukasil P78D) was dispersed in water in a homogenizer to prepare a 20% aqueous dispersion of silica. To this aqueous silica dispersion liquid, a 10% concentration of PVA1 aqueous solution and a cationic polymer (manufactured by Showa Polymer Co., Ltd.: Polytech 700) were added so that the weight ratio of silica / PVA / cationic polymer based on solid content was 100. / 30 / 3, a necessary amount of water was added to obtain a coating liquid for an ink receiving layer with a solid content concentration of 14%.

[0182] As a result of measurement using a BL-type viscometer under the conditions of 30° C. and 30 rpm, the viscosity of the coating liquid immediately after preparation was 540 mPa·s. The viscosity of the coating liquid after being left at 30° C. for 1 week was 1.72 times that immediately after preparation, and hardly changed, and the viscosity stability of the coati...

Embodiment 16～ Embodiment 28

[0203]An ink jet recording paper was produced in the same manner as in Example 15, except that the PVA having a silyl group shown in Table 6 was used instead of the PVA having a silyl group used in Example 15. The surface strength, printing quality and water resistance when printing on the recording material using an ink jet printer were evaluated. The results are shown in Table 6 together.

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
viscosityaaaaaaaaaa
diameteraaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a polyvinyl alcohol obtained through hydrolysis of a polyvinyl ester that contains silyl group-having monomer units. The polyvinyl alcohol satisfies the following formulae (I) and (II) and the pH of aqueous 4 % solution thereof falls between 4 and 8: 20 < P x S < 370 wherein P indicates the viscosity-average degree of polymerization of the polyvinyl alcohol, and S indicates the content (mol%) of the silyl group-having monomer units in the polyvinyl alcohol, 0.1 / 100 <= (A - B) / (B) <= 50 / 100 wherein A indicates the silicon atom content (unit: ppm) of the polyvinyl alcohol, B indicates the silicon atom content (unit: ppm) of the polyvinyl alcohol that has been washed with sodium hydroxide-containing methanol and then washed through Soxhlet extraction with methanol. <>The polyvinyl alcohol is characterized in that it may be readily dissolved in water to form an aqueous solution thereof even though an alkali such as sodium hydroxide or an acid is not added thereto; its aqueous solution has good viscosity stability; its binding force with inorganic substances is high; and a film formed of its mixture with an inorganic substance is excellent in resistance to water. The polyvinyl alcohol is favorable for coating agents for inkjet recording materials and thermal recording materials.

Description

Field of Invention [0001] The present invention relates to vinyl alcohol polymers. More specifically, the present invention relates to a silyl group-containing vinyl alcohol-based polymer having the ability to dissolve in water to prepare an aqueous solution without adding an alkali or acid such as sodium hydroxide, and the aqueous solution having It is characterized by good viscosity stability, excellent adhesion with inorganic substances, and excellent water resistance of the film obtained by mixing it with inorganic substances. [0002] Moreover, this invention relates to the manufacturing method of the above-mentioned vinyl alcohol type polymer. Furthermore, the present invention relates to a coating agent containing the above-mentioned vinyl alcohol-based polymer, and a coating material such as an inkjet recording material or a thermosensitive recording material formed by coating the coating agent on a substrate. Background technique [0003] Vinyl alcohol-based polym...

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): C08F8/12
CPCC08F8/12C08J5/18C08F2800/20Y10T428/31786C08F218/08C08F230/085
Inventor 楠藤健直原敦藤原直树
Owner KURARAY CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com