Investment casting wax based on graphite oxide modified rosin and preparation method thereof

A graphite modification and precision casting technology, applied in casting molding equipment, chemical modification of natural resins, etc., can solve the problems of poor process performance, increased viscosity of mold materials, unfavorable occupational health, etc. Small shrinkage and improved synthesis efficiency

Active Publication Date: 2018-08-10
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] my country is rich in rosin resources. It is an important product of my country's forestry chemical industry and a pillar industry. It is also an important raw material for making precision casting wax. Easy to deteriorate will not only produce carcinogens, which is not conducive to occupational health, but also increase the viscosity of the mold material, increase the shrinkage rate, and deteriorate the process performance. Therefore, it must be modified or added with other organic fillers to make up for it.

Method used

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  • Investment casting wax based on graphite oxide modified rosin and preparation method thereof
  • Investment casting wax based on graphite oxide modified rosin and preparation method thereof
  • Investment casting wax based on graphite oxide modified rosin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 100g first-grade rosin (Jiangxi masson pine, softening point 82°C) to a volume of 1 liter autoclave, dissolve at 120°C, add catalyst graphite oxide 5g (quality 5% of rosin) (Hubei Yihua Chemical Industry Co., Ltd. Co., Ltd.), promoter zinc oxide 3g (0.3% of the mass of rosin) (Nanhua brand), 5g of pentaerythritol (5% of the mass of rosin) (Hubei Yihua Chemical Co., Ltd.), stirring and melting, airtight, continue to heat to 280 ° C , control the system temperature not to exceed 290°C, react for 3 hours, the catalyst zinc oxide and graphite oxide in the system, and the remaining pentaerythritol do not need to be separated to obtain a modified rosin resin mixture, degas and reduce the temperature of the system to 140°C Add C5 petroleum resin 40g (8%) (YH-1288, Henghe Material Technology Co., Ltd.), PE wax 25g (5%) (Thailand SCG chemical / LP0500F polyethylene wax, 115 ℃) and montan wax 10g ( 2%) (Shangcheng brand, Yunnan), melt completely, continue stirring for 30 minute...

Embodiment 2

[0031] Add 100g first-grade rosin (Jiangxi masson pine, softening point 82°C) to a volume of 1 liter autoclave, dissolve at 120°C, add catalyst graphite oxide 8g (quality 5% of rosin) (Hubei Yihua Chemical Industry Co., Ltd. Co., Ltd.), promoter zinc oxide 3g (0.3% of the mass of rosin) (Nanhua brand), 5g of pentaerythritol (5% of the mass of rosin) (Hubei Yihua Chemical Co., Ltd.), stirring and melting, airtight, continue to heat to 280 ° C , control the system temperature not to exceed 290°C, react for 3 hours, the catalyst zinc oxide and graphite oxide in the system, and the remaining pentaerythritol do not need to be separated to obtain a modified rosin resin mixture, degas and reduce the temperature of the system to 140°C About, add terpene resin 40g (8%) (T100, Shenzhen Yoshida Chemical), PE wax 25g (5%) (Thailand SCG Chemical / LP0500F polyethylene wax, 115 ℃) and montan wax 10g (2%) (still was brand, Yunnan), completely melted, and after continuing to stir for 30 minutes...

Embodiment 3

[0035] Add 125g first-grade rosin (Jiangxi masson pine, softening point 82°C) to a volume of 1 liter autoclave, dissolve at 120°C, add catalyst oxide graphite 6.25g (quality 5% of rosin) (Hubei Yihua Chemical Industry Co., Ltd. Co., Ltd.), promoter zinc oxide 3.75g (0.3% of the mass of rosin) (Nanhua brand), 6.25g of pentaerythritol (5% of the mass of rosin) (Hubei Yihua Chemical Co., Ltd.), stirring and melting, airtight, and continued heating to 280°C, the temperature of the control system must not exceed 290°C, react for 3 hours, the catalyst zinc oxide and graphite oxide in the system, and the remaining pentaerythritol do not need to be separated to obtain a modified rosin resin mixture, deflate and reduce the temperature of the system To about 140°C, add terpene resin 40g (8%) (T100, Shenzhen Yoshida Chemical), PE wax 25g (7%) (Thailand SCG Chemical / LP0500F polyethylene wax, 115°C) and montan wax 10g (2%) (Shangcheng brand, Yunnan), completely melted, continue to stir for...

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Abstract

The invention relates to the field of casting wax, in particular to a graphite oxide-modified rosin-based investment casting wax and a preparation method thereof. The graphite oxide-modified rosin-based precision casting wax of the present invention has a component of 20% by mass fraction ~30% modified rosin, 50%~65% paraffin, 5%~10% tackifier, 5%~10% PE wax and 0%~3% montan wax, the total content of each component is 100%; Among them, the components of the modified rosin are primary rosin, graphite oxide, zinc oxide and pentaerythritol, the quality of graphite oxide is 5% to 8% of the quality of primary rosin, and the quality of zinc oxide is 5% of the quality of primary rosin. 0.3% to 0.5%, the quality of pentaerythritol is 5% to 8% of the quality of the primary rosin; the softening point of the modified rosin is 98°C to 103°C, and the acidity value is 15KOH / g to 25KOH / g. The precision casting wax of the invention has small needle penetration, small linear shrinkage, high bending strength and small ash content, and can better meet the requirements of high dimensional accuracy and high surface quality of precision castings.

Description

technical field [0001] The invention relates to the field of casting wax, in particular to investment casting wax based on graphite oxide modified rosin and a preparation method thereof. Background technique [0002] Precision (investment) casting is a less-cut or no-cut casting process developed by the ancient lost wax casting method. It is an excellent process technology in the foundry industry and is used in almost all industrial sectors, especially electronics, Petroleum, chemical industry, nuclear energy, transportation, light industry, textile, pharmaceutical, medical equipment, pump and valve industry, etc. [0003] Investment casting wax is an important material for investment casting. There are three main requirements for investment casting wax, namely thermophysical properties, mechanical properties and process properties. The thermophysical properties include suitable melting temperature range and solidification temperature range. The thermal expansion rate and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L91/06C08L93/04C08L23/06C08L45/00C08L57/00C08K3/04C08K3/22C08K5/053C09F1/04B22C7/02
CPCB22C7/02C08L91/06C08L2205/025C08L2205/035C09F1/04C08L93/04C08L23/06C08L45/00C08K3/04C08K2003/2296C08K5/053C08L57/00B29C39/003B29C39/38B29K2091/00
Inventor 徐勇军蔡卓弟蔡其文尹辉斌
Owner DONGGUAN UNIV OF TECH
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