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CN-122011670-A - Resin mixture for grinding wheel mesh impregnation

CN122011670ACN 122011670 ACN122011670 ACN 122011670ACN-122011670-A

Abstract

The invention relates to a resin mixture for grinding wheel mesh impregnation, which comprises, by weight, 100 parts of thermoplastic phenolic resin, 20-30 parts of thermosetting phenolic resin, 0.8 part of urotropine, 2-4 parts of environment-friendly plasticizer, 0.2 part of KH-550, 20-35 parts of ethanol and 40-55 parts of methanol, when the resin mixture is prepared by adopting the combination, firstly, 40-55 parts of methanol and 20-35 parts of ethanol are weighed and put into a glue tank, a stirrer is started to stir and mix the methanol and the ethanol, then 0.2 part of KH-550 and 100 parts of thermoplastic phenolic resin are put into the glue tank, stirring is carried out for 2 hours, then 0.8 part of urotropine, 20-30 parts of thermosetting phenolic resin and environment-friendly plasticizer are added, and the mixture is fully stirred for 1 hour, and meanwhile, the mixture is taken for detection, and the mixture can be filtered and discharged after the test is qualified, so that the required resin mixture is obtained.

Inventors

  • GU ROUJIAN
  • CUI BOJUN
  • SUN ZONGRONG
  • DING WENHAI

Assignees

  • 江苏九鼎磨具新材料有限公司

Dates

Publication Date
20260512
Application Date
20251204

Claims (7)

  1. 1. The resin mixture for impregnating the grinding wheel meshes is characterized by comprising the following components in parts by weight: 100 parts of thermoplastic phenolic resin, 20-30 parts of thermosetting phenolic resin, 0.8 part of urotropine, 2-4 parts of environment-friendly plasticizer, 0.2 part of KH-550, 20-35 parts of ethanol and 40-55 parts of methanol; When the combination is adopted to prepare the resin mixture, firstly, 40-55 parts of methanol and 20-35 parts of ethanol are weighed and put into a glue tank, a stirrer is started to stir and mix the methanol and the ethanol, then 0.2 part of KH-550 and 100 parts of thermoplastic phenolic resin are weighed and put into the glue tank, stirring is carried out for 2 hours, then 0.8 part of urotropine, 20-30 parts of thermosetting phenolic resin and an environment-friendly plasticizer are weighed and added, stirring is carried out for 1 hour fully, meanwhile, the materials are taken and tested, and after the materials are tested to be qualified, the materials can be filtered and discharged, so that the required resin mixture is obtained.
  2. 2. The resin mixture for impregnating a grinding wheel web according to claim 1, wherein the environmental-friendly plasticizer is 2 parts by weight and the thermosetting phenolic resin is 20 parts by weight when the external ambient temperature is not less than 30 ℃.
  3. 3. The resin mixture for impregnating a grinding wheel web according to claim 1, wherein the environment-friendly plasticizer is used in an amount of 2 parts by weight and the thermosetting phenolic resin is used in an amount of 22.5 parts by weight at an ambient temperature of 20 to 30 ℃.
  4. 4. The resin mixture for impregnating a grinding wheel web according to claim 1, wherein 3 parts by weight of the environment-friendly plasticizer and 25 parts by weight of the thermosetting phenolic resin are used at an external ambient temperature of 0 to 20 ℃.
  5. 5. The resin mixture for impregnating a grinding wheel web according to claim 1, wherein the environmental-friendly plasticizer is used in an amount of 4 parts by weight and the thermosetting phenolic resin is used in an amount of 30 parts by weight when the external ambient temperature is not more than 0 ℃.
  6. 6. The resin mixture for impregnating a grinding wheel web according to claim 1, wherein the environmentally friendly plasticizer is a terephthalate plasticizer.
  7. 7. The resin mixture for impregnating a grinding wheel web according to claim 6, wherein the environmentally friendly plasticizer is any one of diisobutyl terephthalate, dioctyl terephthalate and diisononyl terephthalate.

Description

Resin mixture for grinding wheel mesh impregnation Technical Field The invention relates to the field of glass fiber meshes, in particular to a resin mixture for impregnating a grinding wheel mesh. Background The grinding wheel reinforcing net sheet is a net-shaped structure formed by impregnating a glass fiber net cloth with a resin mixture, drying and punching, is mainly used for grinding wheel cutting sheets, grinding sheets and heavy-load grinding wheels, plays a role in reinforcing, and is an indispensable framework material in the grinding wheels. The resin mixture plays a role of a binder, can be well combined with phenolic resin used in the production of the grinding wheel, maximally improves the reinforcing effect of the glass fiber net sheet, and ensures the cutting and grinding performances of the grinding wheel. At present, the reinforced net sheet products of the grinding wheel are adhered to each other in a short time under the conditions of high temperature and high humidity, and are hard, brittle and powder-falling under the conditions of low temperature in winter, so that more and more grinding wheel manufacturers are not willing to adopt wax paper to separate and stick at the net sheet, and do not adopt the storage of refrigerator transportation and constant temperature and humidity, so that the looseness and hardness of the stored reinforced net sheet of the existing grinding wheel are difficult to meet the demands of the grinding wheel manufacturers. For example, EG 6.5-190.4/124-23/26-30/three, under the condition that the ambient temperature in summer is above 35 ℃ and the relative humidity reaches 70%, the grinding wheel reinforcing mesh accelerates moisture absorption and softening, and the adhesion phenomenon occurs after 3 days of storage. The net sheet is brittle and is slightly bent to fall powder below the environmental temperature of 0 ℃ in winter. In the patent CN101113080B, a phenolic resin impregnated with glass fibers is proposed, in which ethanol is used as a single solvent, dibutyl phthalate or di-zinc phthalate is used as a plasticizer, and a combination of nylon, polyvinyl butyral or polyethylene glycol is used as a toughening agent, so that brittleness is improved, but dibutyl phthalate is not environment-friendly, is forbidden by the european union and is easy to adhere; In CN102898603B, a polyethylene glycol modified phenolic resin and a preparation process thereof are proposed, and the resin in the patent also adopts polyethylene glycol for internal plasticization, which improves brittleness, but also has the problem of easy adhesion, especially in summer, the problem of easy adhesion between stored grinding wheel meshes due to higher external temperature; Patent CN103481210B proposes an adhesive for grinding wheel meshes and a preparation method thereof, which improve adhesion and brittleness, but the composition of the adhesive adopts dibutyl phthalate or zincate, so that the adhesive has the problem of environmental protection, and is forbidden by European Union; the patent CN102952449a proposes a coating formulation of a grinding wheel net, the patent CN107384273a proposes an adhesive for a super-large grinding wheel reinforced glass fiber net, and the patent CN106243907a proposes a coating formulation of a grinding wheel net, wherein the three patents have no plasticizer, so that the problem of high brittleness exists; in CN105255102a, a glass fiber mesh sheet for grinding wheel and a method for manufacturing the same are proposed, and in the patent, cashew oil modified phenolic resin is adopted, but the problem of easy adhesion still exists though softening. Based on the above-mentioned problems, there is a need to improve the resin mixture for impregnating the grinding wheel meshes, so as to improve the hardness and looseness of the current product at different ambient temperatures, achieve the effects of softness and non-adhesion, meet the environmental protection requirements, and meet the low-cost demands of users growing day by day. Disclosure of Invention The invention aims to solve the technical problem of providing the resin mixture for the impregnation of the grinding wheel meshes, which can improve the hardness and the looseness of the impregnated grinding wheel meshes, achieve the effects of softness and non-adhesion and meet the requirement of environmental protection. In order to solve the technical problems, the technical scheme of the invention is that the resin mixture for impregnating the grinding wheel meshes is characterized by comprising the following components in parts by weight: 100 parts of thermoplastic phenolic resin, 20-30 parts of thermosetting phenolic resin, 0.8 part of urotropine, 2-4 parts of environment-friendly plasticizer, 0.2 part of KH-550, 20-35 parts of ethanol and 40-55 parts of methanol; When the combination is adopted to prepare the resin mixture, firstly, 40-55 parts of methanol and 20-35 parts of ethanol are weighed