Modified polyvinyl acetal resin

A polyvinyl acetal resin, polyvinyl alcohol technology, applied in the field of modified polyvinyl acetal resin, can solve the problems of strength and flexibility change, quality rate decline, etc., to achieve excellent flexibility, low viscosity, durable Excellent stability

Inactive Publication Date: 2004-12-15
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] Add 193g of modified polyvinyl alcohol with a degree of polymerization of 800, an ethylene content of 5 mol%, and a saponification degree of 93 mol% to 2900 g of pure water, and stir at 90°C. It takes about 2 hours to dissolve. The solution was cooled to 28°C, 20 g of hydrochloric acid with a concentration of 35% by weight and 115 g of n-butyraldehyde were added to the solution, and the liquid temperature was lowered to 20°C and the temperature was maintained to perform the acetalization reaction to precipitate the reaction product . Then, the liquid temperature was maintained at 30°C for 5 hours, and then the reaction was terminated. The neutralization, water washing, and drying were carried out by a conventional method to obtain a white powder of the modified polyvinyl acetal resin.

[0166] Dissolve the obtained modified polyvinyl acetal resin in DMSO-d 6 (Dimethyl sulfoxide), use 13 The degree of acetalization was measured by C-NMR (nuclear magnetic resonance sp...

Embodiment 2-4

[0168] Except that the degree of polymerization, ethylene content, degree of saponification, type of aldehyde, and degree of acetalization of polyvinyl alcohol were changed in the amounts shown in Table 1, the same method as in Example 1 was used to obtain modified polyvinyl acetal Resin. In addition, in Example 4, 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, there was only one glass transition temperature corresponding to one kind of modified polyvinyl acetal contained therein. , And completely dissolved in a mixture of ethanol / toluene=1 / 1 (weight ratio) and methyl ethyl ketone, it can be confirmed that the modified polyvinyl acetal resin contains ethylene randomly as a main chain structural unit.

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, the ethylene content, the degree of saponification, the type of aldehyde, and the degree of acetalization were changed in the amounts shown in Table 4. In addition, 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, there was only one glass transition temperature corresponding to one kind of modified polyvinyl acetal contained therein. , And completely dissolved in a mixture of ethanol / toluene=1 / 1 (weight ratio) and methyl ethyl ketone, it can be confirmed that the modified polyvinyl acetal resin contains ethylene randomly as a main chain structural unit.

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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 kind of flexibility, adhesion to a resin substrate under high humidity, heat resistance, thermal decomposition, moisture resistance, excellent toughness, low oxygen transmission rate, moderate adhesion, and a solution Modified polyvinyl acetal resin with low viscosity and excellent stability over time, and adhesive compositions, inks, coating compositions, thermally developable photosensitive materials, and slurry combinations for ceramic green sheets using it Objects, and ceramic green sheets (ceramic green sheets). Background technique [0002] In the past, polyvinyl acetal resins such as polyvinyl butyral resins have been used for their excellent toughness, film-forming properties, dispersibility of inorganic and organic powders such as pigments, and adhesion to the coated surface. For example, inks, paints, baking enamels, etching paints, cellulose paints, dispersants, adhesives, ceramic green sheets, thermally develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/632C08F8/28C08J7/043C08J7/048C08J7/054C08J7/056C08K3/00C08K5/00C08K5/103C08L29/14H01G4/12H01G4/30H01M2/16H01M4/62H01M6/22
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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