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Two-pack type adhesive, multilayer body, molded body and packaging material

A technology of adhesives and packaging materials, applied in packaging, wrapping paper, adhesives, etc., can solve the problems of poor heat sealing and insufficient oxygen barrier properties, and achieve excellent formability

Pending Publication Date: 2022-01-28
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to satisfy the required functions with one material
For example, an unstretched polyolefin film used when sealing by heat sealing is excellent in hot workability, but on the other hand, has insufficient oxygen barrier properties
Conversely, nylon film has excellent gas barrier properties, but poor heat sealing properties

Method used

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  • Two-pack type adhesive, multilayer body, molded body and packaging material
  • Two-pack type adhesive, multilayer body, molded body and packaging material
  • Two-pack type adhesive, multilayer body, molded body and packaging material

Examples

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Embodiment

[0188] Hereinafter, specific synthesis examples and examples are given to describe the present invention in detail, but the present invention is not limited to these examples. In addition, in the following examples, "parts" and "%" represent "parts by mass" and "% by mass", respectively, unless otherwise specified.

[0189]

Synthetic example 1

[0190] (Synthesis Example 1) Synthesis of Polyester Polyol (A1-1)

[0191] Using 300.3 parts of isophthalic acid, 300.3 parts of terephthalic acid, 37.7 parts of neopentyl glycol, 101.0 parts of ethylene glycol, and 260.7 parts of 1,9-nonanediol, a polyester polyol was synthesized according to a conventional method. The obtained polyester polyol was diluted with ethyl acetate to a resin solid content of 60%, and the number average molecular weight (Mn) was 3000, the weight average molecular weight (Mw) was 16,000, and the resin hydroxyl value (solid content conversion) was 19.2 mgKOH / g. Polyester polyol (A1-1) having a resin acid value (solid content conversion) of 0.55 mgKOH / g and a glass transition temperature (Tg) of 10.7°C.

Synthetic example 2

[0192] (Synthesis Example 2) Synthesis of Polyester Polyol (A1-2)

[0193] Using 424.8 parts of isophthalic acid, 182.0 parts of terephthalic acid, 57.1 parts of neopentyl glycol, 215.8 parts of 1,6-hexanediol, 34.0 parts of ethylene glycol, and 3-methyl-1,5-pentanediol 86.3 parts, synthetic polyester polyol according to conventional method. The obtained polyester polyol was diluted with ethyl acetate to a resin solid content of 60% to obtain a number average molecular weight (Mn) of 11,200, a weight average molecular weight (Mw) of 25,900, and a resin hydroxyl value (solid content conversion) of 10.8 mgKOH / g. Polyester polyol (A1-2) having a resin acid value (solid content conversion) of 2.2 mgKOH / g and a glass transition temperature (Tg) of 15.8°C.

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Abstract

Disclosed are a two-pack type adhesive, a multilayer body, a molded body and a packaging material. The present invention provides the two-pack type adhesive which has excellent moldability, heat resistance and wet heat resistance. A two-pack type adhesive which is characterized by containing (A) a polyol composition that contains (A1) a polyester polyol and (B) a polyisocyanate composition that contains (B1) an isocyanate compound, and which is also characterized in that: the polyester polyol (A1) is a reaction product of (a1) a polybasic acid or a derivative thereof and (a2) a polyhydric alcohol; and the polyhydric alcohol (a2) contains (a2-1) a polyhydric alcohol wherein the number of carbon atoms in a methylene chain between two hydroxy groups is an odd number from 5 to 19.

Description

technical field [0001] The present invention relates to a two-component adhesive, a laminate obtained by using the two-component adhesive, a molded product, and a packaging material. Background technique [0002] For packaging materials used in the packaging of various contents such as food, daily necessities, and electronic components, strength, Burst difficulty, gas barrier and other functions. When heat sterilization is performed on the contents, autoclave resistance, heat resistance, etc. are required, and transparency is required so that the contents can be confirmed. However, it is difficult to satisfy desired functions with one material. For example, an unstretched polyolefin film used for sealing by heat sealing is excellent in hot processability, but on the other hand, has insufficient oxygen barrier properties. On the contrary, nylon film is excellent in gas barrier property, but poor in heat sealing property. [0003] Due to such circumstances, different types...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06B65D65/40C08G18/42B32B7/12B32B15/088B32B15/20B32B27/06B32B27/32B32B27/34
CPCC09J175/06B65D65/40C08G18/4213B32B7/12B32B27/32B32B27/34B32B27/06B32B15/088B32B15/20B32B27/00C08G18/42C08G63/12C09J175/00C09J167/02Y02P70/50
Inventor 小林裕季菅野勉村上伦康三原崇伊东孝之中村英美神山达哉
Owner DIC CORP