Check patentability & draft patents in minutes with Patsnap Eureka AI!

Anti hot cracking phenol-formaldehyde resin in use for foundry

A phenolic resin and anti-thermal cracking technology, which is applied to casting molding equipment, casting molds, manufacturing tools, etc., can solve problems such as increased casting rejection rate, hot cracking of steel castings, and restrictions on the use of phenolic resin, and achieves improved crack resistance time , meet performance requirements, and reduce costs

Active Publication Date: 2010-07-07
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using ordinary phenolic resin to produce coated sand for steel casting, due to the high brittleness of phenolic resin and high casting temperature, the steel castings are prone to hot cracking, which increases the rejection rate of castings
Such problems limit the use of phenolic resins in the foundry industry

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Get 940 grams (10mol) of phenol, 608 grams (0.75mol) of formaldehyde with a concentration of 37%, add 4.7 grams of benzenesulfonic acid and heat up to reflux reaction, and react at a constant temperature for 4 hours in this state, then under reduced pressure (-0.095MPa) Distill at 170°C under conditions, add 141 grams of cardanol, and react at a constant temperature of 170 to 180°C for 2 hours, and put it into a tray.

Embodiment 2

[0020] Get 940 grams (10mol) of phenol, 567 grams (0.70mol) of formaldehyde with a concentration of 37%, add 4.7 grams of benzenesulfonic acid and heat up to reflux reaction, and react at a constant temperature for 4 hours in this state, then under reduced pressure (-0.095MPa) Distill at 170°C under conditions, add 141 grams of cardanol, and react at a constant temperature of 170 to 180°C for 2 hours, and put it into a tray.

Embodiment 3

[0022] Get 940 grams (10mol) of phenol, 486 grams (0.60mol) of formaldehyde with a concentration of 37%, add 4.7 grams of benzenesulfonic acid and heat up to reflux reaction, and react at a constant temperature for 4 hours in this state, then under reduced pressure (-0.095MPa) Distill at 170°C under conditions, add 141 grams of cardanol, and react at a constant temperature of 170 to 180°C for 2 hours, and put it into a tray.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

This invention discloses a hot cracking-resistant phenolic resin for casting. The hot cracking resistant time of coated sand prepared from the phenolic resin is increased by 30-100%, and the other properties are also qualified for coated sand of steel casting. Besides, the hot cracking-resistant phenolic resin has a low cost, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a modified phenolic resin, in particular to a heat-cracking resistant phenolic resin for casting. Background technique [0002] Phenolic resin is the earliest industrialized synthetic resin in the world. Its main raw materials are widely sourced, its production process and equipment are simple, and it has unique heat resistance, flame retardancy, and excellent adhesion and mechanical properties. It was used in 1994 In the Croning process. Using ordinary phenolic resin to produce coated sand for steel casting, due to the high brittleness of phenolic resin and high casting temperature, the steel castings are prone to hot cracking, which increases the rejection rate of castings. Such problems limit the use of phenolic resins in the foundry industry. Contents of the invention [0003] The present invention overcomes the above-mentioned shortcomings and proposes a thermal cracking-resistant phenolic resin for casting. [0004] ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/22C08G8/34
Inventor 唐路林李枝芳张宝印邢介名
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com