KR20100022946A - The composition and method to manufacture pastel crayon for diy(do it yourself) - Google Patents

Abstract

PURPOSE: A pastel crayon is provided to control the control of hardening rate, to enable DIY(do it yourself) by molding and natural drying, and to minimize heavy metal harmful for the human body. CONSTITUTION: A method for manufacturing a pastel crayon composition for DIY(do it yourself) comprises the steps of: (i) injecting stearic acid 13~30%, lauric acid 2~10%, and glycerine 25~45% in a reaction container, stirring the mixture at 70~90 °C and 150~200 rpm for 1hour to liquefy it; (ii) adding an NaOH aqueous solution to the product obtained from step (i), wherein NaOH 2~10% is dissolved in distilled water 5~17% in the NaOH aqueous solution; (iii) adding surfactant 2~10% and ethanol 2~20% to the fatty acid obtained from step (ii); (iv) adding a polyvinyl acetate emulsion 1~13% in distilled water 3~15%, and the aqueous solution to heat and stir the mixture; (v) adding citric acid 0.1~2.5 % and antifoaming agent 0.1~2.0 % for defoaming the mixture; solidifying a raw liquid obtained from the (v) step, and cutting the solidified raw liquid in a certain size; and heating the cut material at 70~90 °C and adding pigment 2~20% to complete crayon.

Description

 The composition and method to manufacture pastel crayon for DIY (Do It Yourself)}

The present invention relates to a crayon composition and a manufacturing method for DIY, more specifically, it is possible to DIY to manufacture crayons of the desired shape or color by controlling the curing speed of the crayons and harm to the human body by using vegetable fatty acids, food additives The present invention relates to a crayon composition and a method for making a DIY, which is very safe for use by infants and children due to the low content of heavy metals.

Conventional crayons are easily cured using paraffin wax, synthetic colorants, hardeners, etc., and are manufactured by extrusion. However, there are cases in which crayons prepared by the above technique are detected in excess of the allowable heavy metals and environmental hormones are detected, and infants and children are in danger of ingesting heavy metals directly or indirectly while using crayons.

In consideration of this point, a method of preparing crayons using vegetable fatty acids has been proposed as an alternative to paraffin wax, a synthetic coloring agent, and a hardening agent.As a prior art of crayons using the same, solid cured oil, stearic acid, magnesium carbonate and vegetable soybean oil are mixed and commercialized. Publication No. 10-2009-0026425, which is a method for producing a sink-pace combined watercolor chalk, prepared by mixing crayon-patent publication No. 1999-008508 and paraffin wax, stearic acid, magnesium carbonate, hardened oil, and the like.

However, the prior art is that the use of fast curing materials such as paraffin wax, stearic acid, hydrogenated oil, magnesium carbonate can not control the curing rate is not possible DIY, and heavy metals are contained in the use of paraffin wax, so infants ingest heavy metals. There was a problem with risks.

An object of the present invention is to provide a DIY crayon composition and a method of manufacturing a controlled curing rate. Paraffin wax and hardeners, which are the main raw materials of conventional crayons, could not be controlled by the speed of crayons and were cured in a short time so that they could be manufactured only by rod-shaped extrusion. In addition, there is a risk that infants can ingest heavy metals directly or indirectly because heavy metal detection amount exceeds the allowable value, there is a problem that infants are not safe to use.

In view of the above problems, the present invention blocks the direct and indirect heavy metal intake of infants using crayons using vegetable fatty acids, glycerin, ethanol, etc., and controls the curing rate to directly use crayons of the shape and color desired by consumers. Wants to make DIY possible.

The present invention is composed of additives such as solubilizers, colorants, antifoaming agents, such as ethanol and distilled water, which can dissolve vegetable fatty acids easily dissolved in ethanol and distilled water, and solidified by adding sodium hydroxide. Liquenic acid, lauric acid, glycerin is mixed and liquefied by heating and stirring. One step: After the first step is dissolved NaOH in distilled water and added to saponification: Surfactant for dissolution and processability of fatty acids obtained in the second step Three steps of heating and stirring by adding ethanol: Four steps of dissolving the vinyl acetate resin emulsion in distilled water to fix crayons during coloring after the three steps and heating and stirring: citric acid and antifoaming agent for acidity control and defoaming after the four steps 5 steps of adding: The raw material solution obtained in the above 5 steps to dry and solidify a fixed 6, a step of cutting a group: by the addition of a pigment of the desired color dissolved the cutting material obtained in the above Step 6 is composed of seven steps of completing the crevices of the desired color.

According to the present invention, it is possible to manufacture crayons having a desired shape and color by DIY by controlling the curing speed using vegetable fatty acids, glycerin, etc., and easy cleaning of the manufacturing tool without a separate organic solvent after manufacturing crayons at home due to the water-soluble property. It is possible to improve the color drawing and adhesiveness when coloring, and the heavy metal content is less than 1/10 of KS standard to ensure human friendliness.

Example 1 crayon composition for DIY

First, 5 kg of stearic acid and 5 kg of lauric acid and 33.5 kg of glycerin were injected into the reaction vessel, and the solution was heated and liquefied at 80 ° C. After stirring for 1 hour at 150 to 200 rpm, 10 kg of NaOH was slowly added to distilled water, and then sealed and heated and stirred. When the fatty acid was gelled with NaOH, 4.5 kg of surfactant tween 60 and 6.7 kg of ethanol were added and stirred with heat. Subsequently, 1.5 kg of vinyl acetate resin emulsion was dissolved in 8 kg of distilled water, and injected into the reactor. After heating and stirring, 0.5 kg of citric acid, which is an acidity regulator, was injected, followed by defoamering by injecting 0.2 kg of an antifoaming agent to remove bubbles generated during stirring. Filled in a predetermined mold and dried for 4 to 5 hours to prepare a crayon composition for DIY according to the present invention.

Example 2 method for manufacturing crayons for DIY

Cut the crayon composition for DIY prepared in Example 1 to a certain size, and liquefied by heating to 70 ℃ ~ 90 ℃ and added by the pigment of the desired color for 5 minutes by heating and stirring the desired shape mold 4 ~ Solidified by natural drying for 5 hours to prepare a crayon for DIY of the desired color and shape.

Example 3. Compare crayon drawing

In order to compare the drawing degree of the crayon for DIY according to the present invention, the general crayons sold in the market and the DIY crayons prepared according to Example 2 were placed at an angle of about 45 °, and then colored four to five times. As a result of observing with the naked eye as shown in FIG. 3, crayon debris remained when drawing with conventional crayons, but was not neatly drawn, but the coloring with crayons according to the present invention was neatly and uniformly drawn without debris.

Example 4 Analysis of Content of Crayon Hazardous Substances

In order to analyze the harmful substance content of the crayon composition for DIY according to the present invention, as a result of analyzing the DIY crayon heavy metals with an ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometer) as shown in Table 1 An amount less than 1/10 of the hazardous substance content was detected.

Table 1. Heavy Metal Analysis Results by ICP-OES (Inductively Coupled Plasma Emission Spectroscopy)

Pb Cr Sb As Ba CD Hg Se crayon 3.08 3.61 5.41 N / D 5.88 0.08 N / D N / D KS Standard 90 60 60 25 1000 75 60 500

1 is a process flow diagram illustrating a method for manufacturing a crayon composition for DIY according to the present invention.

Figure 2 shows a process for manufacturing crayons using the crayon composition for DIY according to the present invention.

Figure 3 compares the drawing of the crayon for DIY and general crayon according to the present invention.

Claims (3)

1 step of adding stearic acid 13-30%, lauric acid 2-10%, glycerin 25-45% to the reaction vessel and liquefying at 70-90 ℃ for 150 hours at 150-200rpm: Step 2 of gelling (gel) by adding 2 ~ 10% of NaOH in 5 ~ 17% of distilled water to the contents obtained in the first step: 3 steps of heating and stirring by adding 2 to 10% of surfactant and 2 to 20% of ethanol for dissolution and processability of fatty acid obtained in step 2: Four steps of dissolving 1 ~ 13% of vinyl acetate resin emulsion in 3 ~ 15% of distilled water for fixing of crayons during coloring after 3 steps of addition and heating and stirring: 5 steps of defoaming by adding the citric acid 0.1 ~ 2.5%, antifoaming agent 0.1 ~ 2.0% for acidity control after the 4 steps: 6 step of cutting the solidified raw material liquid to a certain size after solidifying by drying the raw material liquid obtained in the above 5 step: 7 steps of completing the crayon by melting the cut material obtained in the above 6 step by heating to 70 ℃ ~ 90 ℃ and add 2 ~ 20% of the pigment of the desired color: Process for producing a crayon composition for DIY, characterized in that consisting of The method of claim 1, Vegetable fatty acid is a mixture of stearic acid, lauric acid, The surfactants are polyoxyethylene sorbitan monolaurate (POE-Sorbitan Monolaurate-TWEEN20), polyoxyethylene sorbitan monoStearate-TWEEN60, polyoxyethylene sorbitan oleate (POE-Sorbitan Oleate- TWEEN80), or mixtures thereof, and nonionic surfactants, Defoamer is a silicone defoamer, Pigment is a crayon composition for DIY, characterized in that the inorganic pigments and organic pigments including iron oxide pigments and titanium dioxide pigments Crepes composition for DIY having a fatty acid composition selected from palmitic acid, mystic acid or a mixture thereof, including stearic acid

Images