Modified polyvinyl acetal resin

A technology of polyvinyl acetal resin and polyvinyl alcohol, which is applied in the field of modified polyvinyl acetal resin, can solve the problems of strength and softness change, high-quality rate decline, etc., and achieve excellent softness, low viscosity, economical Excellent time stability effect

Inactive Publication Date: 2007-05-09
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0032] Furthermore, as the printed circuit board is developed into a thinner laminated ceramic capacitor, the printed circuit board is easily affected by the external environment, especially moisture. When using a hygroscopic adhesive, the so-called strength of the sheet and Softness changes over time, which can cause problems with lower quality rates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0164]

[0165] In 2900g of pure water, add 193g of modified polyvinyl alcohol that randomly contains ethylene as the main chain structural unit with a polymerization degree of 800, an ethylene content of 5 mol%, and a saponification degree of 93 mol%, and stir at a temperature of 90°C Allow about 2 hours to dissolve. The solution was cooled to 28°C, 20 g of 35% by weight hydrochloric acid and 115 g of n-butyraldehyde were added thereto, the liquid temperature was lowered to 20°C, and the acetalization reaction was carried out while maintaining the temperature to precipitate the reaction product . Then, the liquid temperature was maintained at 30° C. for 5 hours, and then the reaction was terminated. Neutralization, washing with water, and drying were carried out by conventional methods to obtain a white powder of modified polyvinyl acetal resin.

[0166] The obtained modified polyvinyl acetal resin was dissolved in DMSO-d 6 (dimethyl sulfoxide), using 13 The degree of acet...

Embodiment 2-4

[0168] Except changing the polymerization degree of polyvinyl alcohol, ethylene content, saponification degree, aldehyde type, and acetalization degree by the amount shown in Table 1, use the same method as Example 1 to obtain modified polyvinyl acetal resin. In addition, in Example 4, the mixture of modified polyvinyl alcohol / unmodified polyvinyl alcohol=1 / 1 (weight ratio) was used. The glass transition temperature of the obtained modified polyvinyl acetal resin was measured with a differential scanning calorimeter. As a result, only one glass transition temperature corresponding to one of the modified polyvinyl acetals contained appeared. , and completely dissolved in a mixed solution of ethanol / toluene=1 / 1 (weight ratio) and methyl ethyl ketone, it was confirmed that ethylene was randomly contained as a main chain structural unit in the modified polyvinyl acetal resin.

Embodiment 5-11

[0183] A modified polyvinyl acetal resin was obtained in the same manner as in Example 1, except that the degree of polymerization of polyvinyl alcohol, ethylene content, degree of saponification, type of aldehyde, and degree of acetalization were changed in the amounts shown in Table 4. Also, in Examples 9-11, a mixture of modified polyvinyl alcohol / unmodified polyvinyl alcohol=1 / 1 (weight ratio) was used. The glass transition temperature of the obtained modified polyvinyl acetal resin was measured with a differential scanning calorimeter. As a result, only one glass transition temperature corresponding to one of the modified polyvinyl acetals contained appeared. , and completely dissolved in a mixed solution of ethanol / toluene=1 / 1 (weight ratio) and methyl ethyl ketone, it was confirmed that ethylene was randomly contained as a main chain structural unit in the modified polyvinyl acetal resin.

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Abstract

It is an object of the present invention to provide a modified polyvinyl acetal resin, which is superior in flexibility, an adhesive property to a resin substrate under high humidities, heat resistance, a thermal decomposition property, humidity resistance and toughness and has low oxygen permeability and an adequate adhesive property and is low in viscosity and high in secular stability of viscosity in forming a solution thereof, and an adhesive composition, an ink, a coating material composition, a thermal developing photosensitive material, a slurry composition for a ceramic green sheet, and a ceramic green sheet, which use the modified polyvinyl acetal resin. <??>The present invention is a modified polyvinyl acetal resin, which is obtainable by acetalizing a modified polyvinyl alcohol having ethylene in a random basis as a constituent unit of a main chain and an ethylene content of 1 to 20 mole % and a saponification degree of 80 mole % or more and, has ethylene in a random basis as a constituent unit of a main chain.

Description

technical field [0001] The present invention relates to a flexible, adhesive to resin substrates under high humidity, heat resistance, pyrolysis, moisture resistance, toughness and low oxygen transmission rate, moderate adhesiveness, prepared as a solution Modified polyvinyl acetal resin with low viscosity and excellent temporal stability of viscosity, and adhesive composition, ink, coating composition, heat-developable photosensitive material, and slurry composition for ceramic green sheets using the same objects, and ceramic green sheets. Background technique [0002] Conventionally, polyvinyl acetal resins such as polyvinyl butyral resins have excellent toughness, film-forming properties, dispersibility of inorganic and organic powders such as pigments, and adhesion to the coated surface, so they have been used in In various applications such as inks, paints, baking enamel, coatings for etching, cellulose coatings, dispersants, adhesives, ceramic green sheets, heat-devel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/40H01M14/00H01G9/00H01B1/06H01L31/04G01N27/406C08G65/04C04B35/622C04B35/632C08F8/28C08J7/043C08J7/048C08J7/054C08J7/056C08K3/00C08K5/00C08K5/103C08L29/14H01G4/12H01G4/30H01M2/16H01M4/62H01M6/22
CPCY02E60/12C08F8/28C04B35/00C08J5/18H01M6/22H01M4/622H01M2300/0085H01M2/168H01M2/1653H01M2/166C08F216/38C08F8/48C08F2800/10C04B35/4682C04B35/634C04B35/63416C04B35/638C04B2235/5445C04B2235/6025C04B2235/608C04B2237/346C09D129/14G03F7/038C09D11/106C08J2367/02C08J2429/14C09J129/04C09J129/14C08L29/14C08L63/00H01M50/461H01M50/446C08J7/048C08J7/043C08J7/054C08J7/056C08F216/06C08F210/02C08F16/06C08L29/04
Inventor 三宅祥隆泽田真一
Owner SEKISUI CHEM CO LTD
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