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Vinyl alcohol polymer, and aqueous solution, coating agent, inkjet recording material, heat-sensitive recording material, and release paper base paper containing same

A technology of inkjet recording materials and heat-sensitive recording materials, applied in the direction of pigment-containing coatings, coatings, paper coatings, etc., can solve problems such as insoluble and insufficient solutions to poor conditions, and achieve high viscosity stability and high filling seams and water resistance, film strength and high water resistance

Active Publication Date: 2014-04-16
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned silyl group-containing PVA, the upper limit of the above-mentioned product (P×S) is set to 370, and the content of the monomer unit having a silyl group is increased to improve the characteristics and characteristics of the silyl group-containing PVA. The trade-off relationship of improving water solubility, etc. is not cancelled.
That is, as described in paragraph 0009 of the above-mentioned Japanese Patent Laid-Open No. 2004-43644, when the product (P×S) is 370 or more, when preparing an aqueous solution of silyl group-containing PVA, there is a problem that if no alkali is added or Acid is sometimes insoluble in the operation of the bad situation
That is, the above-mentioned silyl group-containing PVA cannot sufficiently solve the above-mentioned disadvantages.

Method used

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  • Vinyl alcohol polymer, and aqueous solution, coating agent, inkjet recording material, heat-sensitive recording material, and release paper base paper containing same
  • Vinyl alcohol polymer, and aqueous solution, coating agent, inkjet recording material, heat-sensitive recording material, and release paper base paper containing same
  • Vinyl alcohol polymer, and aqueous solution, coating agent, inkjet recording material, heat-sensitive recording material, and release paper base paper containing same

Examples

Experimental program
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Effect test

preparation example Construction

[0096]

[0097] The preparation method of the PVA is not particularly limited, for example, by copolymerizing a vinyl ester monomer with a monomer endowed with a unit represented by the above formula (1), and then saponifying the resulting copolymer (vinyl ester polymer) And get.

[0098] Examples of the vinyl ester monomers include vinyl formate, vinyl acetate, vinyl propionate, vinyl valerate, vinyl caprate, vinyl laurate, vinyl stearate, and vinyl benzoate. ester, trimethyl vinyl acetate, vinyl tertiary carboxylate, etc., among them, vinyl acetate is preferred.

[0099] In addition, when the monomer imparting the unit represented by the above formula (1) is copolymerized with the vinyl ester monomer, in order to adjust the viscosity-average degree of polymerization (P) of the obtained PVA, etc., within the range that does not impair the gist of the present invention Within, the polymerization can be carried out in the presence of a chain transfer agent. Examples of the ...

Embodiment 1-1

[0272] [Example 1-1] Preparation of PVA1-1

[0273] In a 6L detachable flask equipped with a stirrer, a reflux condenser, a nitrogen introduction pipe, a comonomer dropping port, and an initiator addition port, 1,500 g of vinyl acetate, 500 g of methyl alcohol, and 1.87 g of a compound having the above formula ( 1) For MAmPTMS of the monomer (monomer A) of the group indicated, the system was replaced with nitrogen for 30 minutes while blowing nitrogen gas. In addition, MAmPTMS was dissolved in methanol as a retentate solution (Dierre's solution), and a comonomer solution having a concentration of 8% was prepared, and nitrogen replacement was performed by blowing nitrogen gas. The temperature rise of the reactor was started, and when the internal temperature reached 60°C, 0.8 g of 2,2'-azobisisobutyronitrile (AIBN) was added to start polymerization. The retained solution was added dropwise so that the monomer composition (ratio of vinyl acetate to monomer A (MAmPTMS)) in the p...

Embodiment 1-2～1-31 and comparative example 1-1～1-22

[0277] [Examples 1-2 to 1-31 and Comparative Examples 1-1 to 1-22] Preparation of PVA1-2 to PVA1-53

[0278] In addition to changing the feed amount of vinyl acetate and methanol, the type or amount of addition of monomer A and other polymerization conditions, the concentration of PVAc during saponification, the molar ratio of sodium hydroxide to vinyl acetate units, etc., as shown in Table 1 and Table 2 Except for the saponification conditions, the same operation as in Example 1-1 was performed to obtain PVA1-2 to PVA1-53. See Tables 1 and 2 for the analysis results of each of the obtained PVAs.

[0279] [Table 1]

[0280]

[0281] [Table 2]

[0282]

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Abstract

The purpose of the present invention is to provide: a vinyl alcohol polymer which can form a coating film exhibiting superior water resistance and binder performance, and which has sufficient viscosity stability and water solubility, even in the neutral range; an aqueous solution, coating agent, inkjet recording material, heat-sensitive recording material, and release paper base paper containing such a vinyl alcohol polymer; and manufacturing methods for the same. A vinyl alcohol polymer that comprises monomer units represented by formula (1), and that satisfies formula (I). The PVA preferably also satisfies formula (II) and (III). (I) 370=PS=6,000 (II) 200=P=4,000 (III) 0.1=S=10 (in the formulae, P represents the viscosity-average polymerization degree, and S represents the content of the abovementioned monomer units (mol%)).

Description

Technical field [0001] The present invention involves ethylene polymer with methanellinel, aqueous solution containing the polymer, coating agent, inkjet record material, thermist record material, and peeling paper. Background technique [0002] The ethylene alcohol polymer represented by polyvinol (below, sometimes briefly records "PVA".) As a hydraulic synthetic polymer, it is widely used for the raw materials, paper processing agents, paper processing agents, paper processing agents, andFiber processing agents, adhesives, emulsification polymerization and suspension agent, adhesives, thin film, etc. of inorganic objects.In particular, compared with other water -soluble synthetic polymers, the strength characteristics of the PVA are excellent and the film formation is excellent. It effectively uses this characteristic., The adhesive in the paint coating, the coating agent (filler) of the paper surface in the paper on the paper), the material of the ink acceptance layer in the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F230/08B41M5/00B41M5/50B41M5/52C08F218/04C09D129/04C09D143/04D21H19/20C09J7/21
CPCC08F218/08B41M5/3372B41M5/44B41M2205/04B41M2205/38C09J7/048C09D129/04B41M5/5254B41M5/529D21H19/60D21H17/36C08F230/08D21H27/001D21H21/16B41M2205/40B41M5/443D21H19/20C09D143/04B41M5/506C09D129/02C09J7/21C09J7/205Y10T428/2839Y10T428/31895C08F230/085
Inventor 田冈悠太新居真辅仲前昌人
Owner KURARAY CO LTD
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