JPS6142559A - Amino resin molding material - Google Patents

Abstract

PURPOSE:To improve heat resistance while retaining flame resistance, by adding a phosphate ester to an amino resin molding material obtd. by adding reinforcing agent, filler, curing agent, parting agent, colorant, etc. to an amino resin. CONSTITUTION:A reinforcing agent (e.g. woodmeal), a filler (e.g. calcium carbonate), a curing agent (e.g. hexamethylenetetramine), a parting agent (e.g. stearic acid), a colorant, etc. are added to an amino resin such as urea resin, melamine resin or guanamine resin. Further, a phosphate ester is added thereto to obtain the desired amino resin molding material. Examples of the phosphates are tricresyl phosphate and conventional phosphates. The phosphate is used in a quantity of 0.1-3pts.wt. per 100pts.wt. amino resin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an amino resin molding material used for wiring devices, 4-wire devices, etc.

[Background technology]

Conventionally, amino resin molding materials have had a drawback in heat resistance, despite their excellent arc resistance, tracking resistance, electrical insulation, flame resistance, coloring properties, surface hardness, and solvent resistance. Attempts have been made to add phenolic resins, etc. as an improvement for this purpose, but since the flame resistance deteriorates, adding aluminum hydroxide, antimony trioxide, etc. as a countermeasure further increases the specific gravity and causes problems during molding. There was a drawback that mold fogging occurred.

[Purpose of the invention]

An object of the present invention is to provide an amino resin molding material that has excellent heat resistance while maintaining flame resistance.

[Disclosure of the invention]

The present invention is characterized in that phosphate ester V is further added to an amino resin molding material consisting of an amino resin, a reinforcing agent, a filler, a curing agent, a mold release agent, a coloring agent, and if necessary, a pheno-V resin. The present invention will be described in detail below using the amino resin molding material.

The phosphoric acid ester V used in the present invention includes those generally referred to as phosphoric acid tricrezi V, phosphoric acid tricrezi M, etc., and any phosphoric ester M in general can be used, and the types of phosphoric ester ester V are specifically limited. isn't it. Further, the amount of the phosphoric ester is not particularly limited, but it is preferable to add 0.1 to 3 parts of the phosphoric ester to 100 parts (hereinafter simply referred to as parts) of the amino resin. That is, 0.
If it is less than 1 part, the degree of improvement in flame resistance tends to be small.
This is because if it exceeds 3 parts, the heat resistance tends to decrease.
Ru. As amino resins, it can be applied to all amino resins such as urea resin, melamine resin, guanamine resin, etc., modified products, and mixtures, reinforcing materials such as pulp and wood flour, carbonic acid Mium, and hydroxide. Fillers such as Reminium, hardeners exclusively for hexamethylenetetramine, mold release agents such as stearic acid, zinc stearate, and wax, coloring agents, and pheno-7 resins such as pheno-7 resins, cresol resins, and xylenol resins. The resins are blended, mixed, pulverized, and sieved as necessary to form a powdered molding material, or further granulated to form a granular molding material. Embodiments of the present invention will be described below together with conventional examples.

[Examples 1 to 3] 1100 parts of Pal was added to 200 parts of melamine resin liquid of 50 weight JLc, and 0.1 part of tricresyl phosphate was added for Example 1, 1 part for Example 2, For Example 3, 3 parts were added and mixed in Nigu for 6 hours,
To each of the dried resin-impregnated pipes was added 1 part of acid, 1 part of aluminum hydroxide, 1 part of zinc stearate, 1 part of colorant, and for Examples 2 and 3, 10 parts of phenol-7 resin. The mixture was added, mixed and pulverized to obtain an amino resin molding material.

[Conventional example]

An amino resin molding material was obtained in the same manner as in Example 3 except that tricresyl phosphate was not added.

〔Effect of the invention〕

The flame resistance and heat resistance of the amino resin molding materials of Examples 1 to 3 and the conventional example are clearly shown in Table 1. The flame resistance and heat resistance of the amino resin molding materials of the present invention are 2. It was confirmed.

S1 table note *I According to UL Standard 94.

*2 After heating at that temperature for 12 hours, V - temperature with no visual change.

Claims (2)

[Claims] (1) Amino resin with reinforcing material, filler, curing agent, mold release agent,
An amino resin molding material comprising a coloring agent, a phenol resin, etc. added as needed, and further comprising a phosphoric acid ester. (2) The amino resin molding material according to claim 1, wherein the amount of the phosphoric acid ester is 0.1 to 3 parts by weight per 100 parts by weight of the amino resin.