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Composition for molded foam and production method therefor, molded foam and production method therefor, and modified cellulose-containing resin composition for molded foam

A foam molding and cellulose resin technology, applied in the field of foam molding compositions, can solve the problems of carbon fiber flame retardancy, inconvenient heat recovery, and waste disposal

Inactive Publication Date: 2019-02-05
SEIKO PMC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbon fiber is flammable, inconvenient for heat recovery, and expensive
In addition, although the price of glass fiber is relatively cheap, there is a problem of waste disposal during heat recovery.

Method used

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  • Composition for molded foam and production method therefor, molded foam and production method therefor, and modified cellulose-containing resin composition for molded foam
  • Composition for molded foam and production method therefor, molded foam and production method therefor, and modified cellulose-containing resin composition for molded foam
  • Composition for molded foam and production method therefor, molded foam and production method therefor, and modified cellulose-containing resin composition for molded foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0092] Embodiments of the present invention are described below. It should be noted that the present invention is not limited by these Examples. In addition, "%" in the examples means "mass%" unless otherwise emphasized.

[0093]

[0094] The methods for measuring physical properties used in some of these Examples are as follows.

[0095] Calculation of the degree of hydroxyl substitution (DS) of carboxyl-containing modified cellulose (E)

[0096] The calculation of the substitution degree DS of the carboxyl-containing modified cellulose (E) is obtained by the mass increase rate before and after the reaction after removing the modifier used as a raw material or its hydrolyzate and other by-products by washing the reactant. Calculate according to the following formula.

[0097] DS=(a / b) / (c / d)

[0098] a: (dry mass of carboxy-containing modified cellulose (E))-(dry mass of cellulose fiber)

[0099] b: Molecular weight of polybasic anhydride (G)

[0100] c: Dry mass of ce...

manufacture example

[0122] Put 500 parts by mass of hydrated coniferous bleached kraft pulp (NBKP) (solid content: 100 parts by mass) and 150 parts by mass of N-methylpyrrolidone (NMP) into the container, dehydrate under reduced pressure to distill off water, and put hexadecene succinic anhydride 19.9 parts by mass were reacted at 80° C. for 4 hours. After the reaction, NMP was distilled off under reduced pressure to obtain carboxyl group-containing modified cellulose (E-1). The degree of substitution (DS) of the polybasic anhydride is 0.11, and the iodine value is 8. It should be noted that (E-1) itself is also a modified cellulose fiber (A) having unsaturated bonds.

[0123] [Production example of carboxyl group-containing modified cellulose (E-2)]

[0124] 500 parts by mass of water-containing NBKP (100 parts by mass of solid content) and 150 parts by mass of NMP were put into the container, the water was distilled off by dehydration under reduced pressure, 6.2 parts by mass of succinic anhy...

Embodiment 1

[0182] The foam-forming composition obtained by using the above-mentioned foam-forming composition (M-1) was filled into a metal mold in a press heated at 160° C., and kept under pressure for 25 minutes, thereby obtaining Foam molding. The density is 0.10g / cm 3 .

[0183] [Examples 2-11, Reference Example 1, Comparative Examples 1-3]

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Abstract

The purpose of the present invention is to provide: a composition for molded foam which contains a peroxide and a foaming agent and which is obtained by uniformly dispersing cellulose fibers in a resin for a foam molding material having high hydrophobicity, such as a thermoplastic resin or a rubber; and a foam having superior mechanical physical properties obtained by reacting the composition formolded foam during foam molding. The composition for molded foam contains modified cellulose fibers (A) having an unsaturated bond, a thermoplastic resin and / or a rubber (B), a peroxide (C), and a foaming agent (D).

Description

technical field [0001] The present invention relates to a composition for molded foams, a method for producing the same, a molded foam using the composition for molded foams, a method for producing the same, and a modified cellulose-containing resin composition for molded foams. Background technique [0002] Resins for foam molding materials such as polyethylene and polypropylene are inexpensive, and have excellent flexibility and chemical resistance. From this point of view, they are widely used in containers, pipes, films, and medical applications. Furthermore, it is conventionally known to obtain a foam by foaming a resin for a foam molding material in order to impart weight reduction, heat insulation, and shock absorption. Foams of resins for foam molding materials are lighter in weight at the same volume and excellent in heat insulation and impact absorption compared to unfoamed state, but on the other hand, there are mechanical properties that decrease as the expansion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/04C08J9/06C08K5/14C08K5/23C08L1/02C08L23/00C08L25/04C08L33/00C08L67/00
CPCC08J9/06C08L23/04C08J2201/026C08J9/0085C08J9/0061C08J2401/10C08J2323/06C08J9/103C08J2203/04C08L1/10C08B3/12C08B15/00C08L1/02C08K5/14C08K5/23C08L33/04C08L67/00C08J9/102C08J2201/03C08J9/104C08J9/107C08J9/106C08J2301/02C08L2203/12C08L2203/14C08J2300/22C08J2325/06C08J2333/06C08J2367/00C08J2323/02C08J2321/00C08J9/0023C08L33/00C08J9/04
Inventor 山田修平柳崛有希乃大平脩一黑木大辅
Owner SEIKO PMC CORP
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