JPS588753A - Amino resin molding material - Google Patents

Abstract

PURPOSE:To provide the titled molding material which lowers melt viscosity and gives high fluidity during molding, by adding a polyester plasticizer to an amino resin. CONSTITUTION:0.5-10wt% polyester plasticizer such as an adipate polyester plasticizer and, if necessary, a hardener, a parting agent, a filler, a colorant, etc. are blended with an amino resin such as urea resin or melamine resin. The mixture is kneaded and crushed or, if necesary, granulated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an amino resin molding material used for wiring devices, electrical appliances, etc., and its purpose is to reduce melt viscosity during molding and obtain high fluidity during molding. It is in.

Conventionally, para-toluene sulfonamide, polyethylene glycol, polyvinyl alcohol, etc. were added to obtain high fluidity during molding, but para-toluene sulfonamide required a large amount to be added and was less effective. Polyvinyl alcohol and polyvinyl alcohol have the drawback of causing caking and flora in the molding material.

The present invention solves the above-mentioned drawbacks and achieves high fluidity during molding by adding a polyester plasticizer.The present invention will now be described in detail.

The amino resin used in the present invention may be a urea resin, a melamine resin, a guanamine resin, a phenol-modified melamine resin, etc., and may be in either liquid or solid form. As the polyester plasticizer, general polyester plasticizers such as adipic acid polyester M plasticizer and heptabasic acid polyester plasticizer can be used. The amount of polyester plasticizer is not particularly limited, but it is preferably 0.5 to 1O based on the total amount.
Weight % (hereinafter simply referred to as %) is desirable. That is, if it is less than 0.5, the effect will be small, and if it exceeds 10%, the appearance of the molded product will tend to deteriorate. Additives other than amino resins and polyester plasticizers include curing agents, mold release agents, base materials, fillers, etc. that are commonly used as amino resin molding materials.
The coloring agent and the like can be used as they are, and the amino resin molding material can be obtained by mixing, kneading, pulverizing, or, if necessary, granulating the above materials.

The present invention will be explained below using examples.

Example 1 Wood powder lead, 0.5 part phthalic acid, 11 parts stearic acid ff, 1 part colorant, polyester plasticizer to 60 parts by weight (hereinafter simply referred to as parts) of solid melamine resin with residual water content of 10 Φ. (Adeka Sizer PN-150, manufactured by Adeka Argus Chemical Co., Ltd.) 0.5 part was added, mixed and crushed to obtain a C melamine resin molding material.

Example 2 1800 parts of urea resin initial condensate with a resin content of 60%, 0.8 parts of ammonium chloride, hydroxide) old part of IJum, 260 parts of pulp, polyester? Plasticizer (Adeka Argus Chemical Co., Ltd., Adeka Sizer PN 4)
00), add 10 parts, cross-wire, and dry to obtain a dry product.
To 100 parts of the dry product IC, 0.5 part of zinc stearate and 0.6 part of a coloring agent were added, colored with a ball mill, and pulverized to obtain an amino resin molding material.

Comparative Example 0.8 parts of ammonium chloride, 01 parts of sodium hydroxide, and 260 parts of pulp were added to 1800 parts of a urea resin initial condensate with a resin content of 60% as in Example 2, mixed, mixed, and dried. A dried product was obtained, and 0.5 part of zinc stearate and 0.5 part of a coloring agent were added to 100 parts of the dry product, colored with a ball mill, and pulverized to obtain an amino resin molding material.

The amino resin molding materials of Examples 1 and 2 and the comparative example were molded at a molding pressure of 100°C and a molding temperature of 140°C, and the fluidity was tested. The results are shown in Table 1. It was confirmed that the fluidity during molding was superior to that of the present invention.

Chapter 1 Table Note: Based on rice disc elongation test.

patent applicant Matsushita Electric Works Co., Ltd. Representative Patent Attorney Toshimaru Takemoto (2 others)

Claims (2)

[Claims] (1) An amino resin molding material characterized by adding a polyester plasticizer. (2) The amino resin molding material according to claim 1, wherein the amount of polyester plasticizer is 0.5 to IO% by weight.