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Polycarbodiimide compound, aqueous resin composition, and food packaging container

A technology of polycarbodiimide and water-based resin, which is applied in the direction of biological packaging, packaging, wrapping paper, etc., and can solve problems such as failure to achieve

Pending Publication Date: 2022-06-07
NISSHINBO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As such, since the coating film of the above-mentioned water-based resin has not been used for food packaging, water resistance and adhesion (for example, water resistance when immersed in high-temperature water and adhesion after immersion) have not reached a level that can withstand as food packaging. The degree of use for packaging

Method used

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  • Polycarbodiimide compound, aqueous resin composition, and food packaging container
  • Polycarbodiimide compound, aqueous resin composition, and food packaging container
  • Polycarbodiimide compound, aqueous resin composition, and food packaging container

Examples

Experimental program
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Effect test

preparation example Construction

[0088] In the manufacturing method of a polycarbodiimide compound (A), the usage-amount of the said catalyst is 0.01-2.0 mass parts normally with respect to 100 mass parts of diisocyanate compounds used for carbodiimidization.

[0089] The above-mentioned carbodiimidation reaction may be performed without a solvent or in a solvent. Usable solvents include: alicyclic ethers such as tetrahydroxyfuran, 1,3-dioxane, and dioxolane; aromatic hydrocarbons such as benzene, toluene, xylene, and ethylbenzene; chlorobenzene , dichlorobenzene, trichlorobenzene, perchlorethylene, trichloroethane and dichloroethane, and other halogenated hydrocarbons; and cyclohexanone, etc. These may be used individually or in combination of 2 or more types.

[0090] When the reaction is performed in a solvent, the concentration of the diisocyanate compound is preferably 5 to 55% by mass, more preferably 5 to 20% by mass.

[0091] The conditions of the above-mentioned carbodiimidization reaction are not ...

preparation example 1

[0170] (Preparation Example 1) Preparation of Polycarbodiimide-Containing Liquid (Crosslinking Agent 1)

[0171] 100 parts by mass of dicyclohexylmethane-4,4'-diisocyanate (HMDI), a carbodiimidization catalyst (3-methyl-1-phenyl-2-phosphole-1-oxide) Add 0.5 parts by mass into a reaction vessel with a reflux tube and a stirrer, and stir at 190° C. for 6 hours under nitrogen flow to obtain isocyanate-terminated poly-4,4′-dicyclohexylmethanecarbodiimide (polymerization degree=3).

[0172] The obtained isocyanate-terminated poly-4,4'-dicyclohexylmethanecarbodiimide was measured by infrared absorption (IR) spectrum using an infrared spectrophotometer (FT / IR-6100, manufactured by JASCO Corporation), and it was confirmed that a wavelength of 2150 cm -1 Around the absorption peak of the carbodiimide group.

[0173] Next, the isocyanate-terminated poly-4,4'-dicyclohexylmethanecarbodiimide obtained above was allowed to cool to 120°C, and 63.5 parts by mass (relative to the isocyanate-t...

preparation example 8

[0178] (Preparation Example 8) Preparation of Liquid (Crosslinking Agent 8) Containing Polycarbodiimide

[0179] 100 parts by mass of dicyclohexylmethane-4,4'-diisocyanate (HMDI), a carbodiimidization catalyst (3-methyl-1-phenyl-2-phosphole-1-oxide) Add 0.5 parts by mass into a reaction vessel with a reflux tube and a stirrer, and stir at 190° C. for 10 hours under nitrogen flow to obtain isocyanate-terminated poly-4,4′-dicyclohexylmethanecarbodiimide (polymerization degree=8).

[0180] The obtained isocyanate-terminated poly-4,4'-dicyclohexylmethanecarbodiimide was measured by infrared absorption (IR) spectrum using an infrared spectrophotometer (FT / IR-6100, manufactured by JASCO Corporation), and it was confirmed that a wavelength of 2150 cm -1 Around the absorption peak of the carbodiimide group.

[0181] Next, the isocyanate-terminated poly-4,4'-dicyclohexylmethane carbodiimide obtained above was left to cool to 120°C, and polyethylene glycol monomethyl ether (average mol...

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Abstract

Provided are: a polycarbodiimide compound which is capable of forming an aqueous resin composition having a coating film (layer) capable of withstanding water resistance and adhesion for use in food packaging; an aqueous resin composition containing the polycarbodiimide compound; and a food packaging container provided with a layer formed from the aqueous resin composition. A polycarbodiimide compound (A) according to the present invention is represented by general formula (1). In the formula, R1 represents a residue obtained by removing a functional group capable of reacting with an isocyanate from a hydrophilic compound having a functional group capable of reacting with an isocyanate, R2 represents a divalent residue obtained by removing an isocyanate group from an aliphatic diisocyanate compound, and n represents an integer of 1-2. And R3 represents a divalent residue obtained by removing a hydroxyl group from a diol compound having 2 or 3 carbon atoms. And X represents a group formed by a reaction between the hydrophilic compound and the aliphatic diisocyanate compound. N1 represents a number of 1-10, n2 represents a number of 1-10, and p represents a number of 2-4. The plurality of R1 and R2 may be the same as or different from each other.

Description

technical field [0001] The invention relates to a polycarbodiimide compound, an aqueous resin composition and a food packaging container. Background technique [0002] Conventionally, as a method of improving various physical properties such as strength, water resistance, and durability of a coating film of a water-based resin, a carbodiimide compound capable of reacting with a functional group (such as a carboxyl group) of the water-based resin to form a crosslinked structure has been used in combination. etc. (for example, refer to Patent Documents 1 and 2). [0003] The coating film of the above-mentioned water-based resin has hitherto been used in various fields such as paint, ink, fiber treatment agent, adhesive, coating agent, etc., but it has not been used for food packaging. [0004] As such, since the coating film of the above-mentioned water-based resin has not been used for food packaging, water resistance and adhesion (for example, water resistance when immersed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/09C08G18/75C08G18/79C09D175/12C09J175/12B65D85/50
CPCC09J175/12C08G18/09C08G18/75C09D175/12C08G18/79B65D85/50C08G18/168C08G18/095C08G18/755C08G18/758C08G18/722C08G18/797C08G18/283C08G18/3206C08G18/10C09J175/04C08G2170/80B65D65/42C09D175/04C08G18/4825C08G18/4833C08G2150/00C08G2170/00
Inventor 松本展幸中岛骏太伊藤贵彦
Owner NISSHINBO CHEM
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