CN102391448A - Preparation method of phenolic resin for resin grinding wheel adhesive and thermosetting liquid phenolic resin - Google Patents
Preparation method of phenolic resin for resin grinding wheel adhesive and thermosetting liquid phenolic resin Download PDFInfo
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- CN102391448A CN102391448A CN2011102430138A CN201110243013A CN102391448A CN 102391448 A CN102391448 A CN 102391448A CN 2011102430138 A CN2011102430138 A CN 2011102430138A CN 201110243013 A CN201110243013 A CN 201110243013A CN 102391448 A CN102391448 A CN 102391448A
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Abstract
The invention provides a preparation method of phenolic resin for a resin grinding wheel adhesive, which comprises the following steps that: in the presence of an organic amine catalyst, a phenolic compound and formaldehyde are subjected to a condensation reaction; a mixture obtained by the condensation reaction is subjected to vacuum distillation, and then a coupling agent is added to the mixture to obtain a phenolic resin. The invention also provides a thermosetting liquid phenolic resin with a metal ion concentration of less than 100PPM. In the method provided by the invention, on one hand, organic amine is used as the catalyst to improve the water resistance of the phenolic resin, on the other hand, the coupling agent is used to improve the adhesion strength of the phenolic resin and other materials, so that the situation that the phenolic resin has higher adhesion strength for a long time is ensured, and thus the performance degradation of a resin grinding wheel is not easily caused by reduced adhesion strength of the phenolic resin in a storage period, and the service life of the resin grinding wheel is prolonged.
Description
Technical field
The present invention relates to polymeric material field, particularly a kind of preparation method and heat curing-type liquid phenolic resin that is used for the resol of resin wheel tackiness agent.
Background technology
Resol is claimed bakelite again, is made by phenolic cpd and formaldehyde condensation.Resol is the synthetic resins of realizing suitability for industrialized production the earliest, and it has outstanding high temperature resistance, under hot conditions, also can keep the globality and the size stability of its structure.Just because of this, resol is widely used as refractory materials, friction materials and tackiness agent etc.
Tackiness agent is the topmost application of phenolic resin material, from the sixties in 20th century resol just as the tackiness agent of coated abrasive tools such as resin wheel, brake band and clutch surface.Material finish grindes and polishes through the organic resin grinding tool usually in carrying out ground finish, and organic grinding tool has certain elastic deformation, the available buffer grinding force, thereby grinding and polishing effect are good, can reduce the roughness of material surface.The resol resistance toheat is good, and mechanical strength is high, and flame retardant resistance and electrical insulation capability are good, and high temperature resistant creep property is excellent and cheap, is one of most important tackiness agent in the coated abrasive tool technology.
Resin wheel is with sticker abrasive material to be sticked to the circular bonded abrasive tool that the central authorities of processing on the resin base material are provided with through hole.During use, the emery wheel high speed rotating can be roughly ground the cylindrical of metal or non-metal workpiece, interior circle and multiple profile, half correct grinding, correct grinding, fluting or cut-out etc., is a kind of grinding tool that a kind of consumption is maximum, use range is the widest.In the existing resin wheel industry; Especially the difficult problem that ultra-thin resin wheel industry all exists: resin wheel performance degradation always occurs at memory period; Be embodied in: the emery wheel of harsh product has very high cut ratio when cutting operation, but product is after storage for some time; About about 1 month, the performance of emery wheel will reduce about 30%～60%.This usability and mill that has had a strong impact on emery wheel is cut the life-span.
Summary of the invention
Existing resin wheel adopts resol usually with sticker, and the inventor finds after deliberation: the reduction of phenolic resin bonded intensity is to influence one of principal element of grinding wheel performance decline.Mostly existing heat curing-type liquid phenolic resin is water soluble resin, and catalyzer is alkali-metal oxyhydroxide or oxide compound, and the most common is NaOH.Behind resin solidification, base metal catalysts can all remain in the resol, and promptly base metal catalysts is present in the resin wheel system.Emery wheel is in storage process; The moisture of external environment can infiltrate resin system, and along with the increase of moisture in the resin wheel, basic metal produces ionizing event under the effect of water molecules; Destroy the cohesive action between resin and the abrasive material, thereby caused the decline of resin property.
The technical problem that the present invention solves is to provide a kind of preparation method who is used for the resol of resin wheel sticker, and this resol can keep higher bonding strength for a long time.
In view of this, the present invention provides a kind of preparation method who is used for the resol of resin wheel sticker, comprising:
Under the condition that the organic amine catalyzer exists, phenolic cpd and formaldehyde generation condensation reaction;
Add coupling agent after the mixture vacuum distilling that condensation reaction is obtained, obtain resol.
Preferably, said organic amine catalyzer is a hydramine.
Preferably, said hydramine is one or more in Monoethanolamine MEA BASF, diethylolamine, trolamine, dimethyl-hydramine, the diglycolamine.
Preferably, said phenolic cpd is one or more in phenol, Resorcinol, meta-cresol, the p-tert-butylphenol.
Preferably, said coupling agent is an organo silane coupling agent.
Preferably, the weight ratio of said organic amine catalyzer and phenolic cpd is 100: (1～5).
Preferably, the mol ratio of said phenolic cpd and formaldehyde is 1: (1～1.6).
Preferably, the weight ratio of said phenolic cpd and coupling agent is 100: (0.1～1).
Preferably, 70 ℃～85 ℃ of the temperature of said condensation reaction.
The present invention also provides a kind of heat curing-type liquid phenolic resin, and its concentration of metal ions is no more than 100PPM.
The present invention provides a kind of preparation method who is used for the resol of resin wheel tackiness agent, comprises the steps: under the condition that the organic amine catalyzer exists phenolic cpd and formaldehyde generation condensation reaction; Add coupling agent after the mixture vacuum distilling that condensation reaction is obtained, obtain resol.Can know by such scheme; The present invention at first, adopts organic amine as catalyzer in order to improve the bond strength of resol; Because organic amine is volatile; The residual quantity of reaction back in resol is lower, and the organic amine that remains in the resol also can crosslinked and stable being present in the resin system take place with resol, meets water and ionizing event can not take place.Improve the water resistance of resol self thus, make resol have bond strength preferably for a long time, reduce the destructive force of water molecules resol and emery wheel bonding strength.Secondly, add coupling agent, improve the bond strength of resol and other materials to reacted resol.
Therefore; One aspect of the present invention adopts organic amine to improve the water resistance of resol as catalyzer; Adopt coupling agent to improve the bond strength of resol and other materials on the other hand; Guarantee that thus resol can have higher bond strength for a long time, make resin wheel be difficult for causing performance degradation, prolonged the work-ing life of resin wheel because of the reduction of phenolic resin adhesion intensity at memory period.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, describe just to further specifying feature and advantage of the present invention but should be appreciated that these, rather than to the restriction of claim of the present invention.
The embodiment of the invention discloses a kind of preparation method who is used for the resol of resin wheel tackiness agent, comprising:
Under the condition that the organic amine catalyzer exists, phenolic cpd and formaldehyde generation condensation reaction;
Add coupling agent after the mixture vacuum distilling that condensation reaction is obtained, obtain resol.
Among the above-mentioned preparation method, the operation that the first step is to use organic amine catalysis phenolic cpd and formaldehyde to carry out condensation.With respect to the catalyzer of alkaline metal salt, the present invention selects for use organic amine to be as the purpose of catalyzer: at first, organic amine also has katalysis preferably to above-mentioned condensation reaction; Secondly, organic amine is more volatile, and the residual quantity in resol is little; At last, residual a small amount of organic amine can take place crosslinkedly with resol, and stable is present in the phenolic resin system, meets water and also ionizing event can not take place.Therefore, adopt organic amine can improve the water resistance of resol, reduce the destructive force of water molecules resol and emery wheel bonding strength as the catalyzer of condensation reaction.
The organic amine catalyzer preferably adopts hydramine, and itself and phenol have consistency preferably, and more volatile, and the later stage is prone to remove less residue in resol.More preferably adopt in Monoethanolamine MEA BASF, diethylolamine, trolamine, dimethyl-hydramine, the diglycolamine one or more.Phenolic cpd preferably adopts one or more in phenol, Resorcinol, meta-cresol, the p-tert-butylphenol, and more preferably phenol or Resorcinol most preferably adopt phenol.
In the condensation reaction, the weight ratio of phenolic cpd and organic amine catalyzer is preferably 100: (1～5), catalyst levels cross that I haven't seen you for ages and reduce the resultant velocity of resol, reduce production efficiency greatly; The excessive one side of catalyst levels can make speed of response too fast, and reaction is not easy control, also can cause catalyzer too much residual on the other hand, influences the hardness of resin.For this reason, more preferably controlling phenolic cpd and weight ratio organic amine is 100: (2.5～4).
The mol ratio of phenolic cpd and formaldehyde preferably is controlled to be 1: (1～1.6), formaldehyde is very few, and the phenolic resin curing cross-linking density is little, and intensity is lower, and resistance toheat descends; Formaldehyde is too much, and the resol cross-linking density is big, though intensity is high, resistance toheat is good, and resin fragility increases.
The temperature of above-mentioned condensation reaction preferably is made as 70 ℃～85 ℃, preferably carries out according to following mode:
Phenolic cpd and organic amine catalyst mix is even, obtain the mixing solutions of phenolic cpd and organic amine catalyzer;
Under 70 ℃～85 ℃, in said mixing solutions, add formaldehyde in batches and carry out condensation reaction, preferably finish in 60min～120min formaldehyde adding.Then solution is warming up to 80 ℃～85 ℃ and continues reaction, the reaction times preferably is controlled to be 1.5h～3h, and the concentration of formaldehyde is less than 1.2% in the control reactant.
Need the mixture that reaction obtains be carried out vacuum distilling after the condensation reaction, phenol resin solution is concentrated, also can remove the organic amine catalyzer simultaneously.Pressure preferably is made as 60mmHg～80mmHg in the vacuum distilling operation, and temperature preferably is controlled to be 35 ℃～45 ℃.The water cut that preferably will be distilled to phenol resin solution is 6%～14%, and viscosity is 300～2000cp25 ℃.
In phenol resin solution, add coupling agent after the vacuum distilling, the purpose that adds coupling agent is to improve the bonding strength of resol and inorganic materials.Coupling agent preferably adopts organo silane coupling agent, and more preferably adopting model is the coupling agent of KH550, KH560, KH570, KH792, DL602 or DL171.The add-on of coupling agent and the weight ratio of phenolic cpd are preferably 100: (0.1～1).Coupling agent adds the bonding strength that too much can reduce resol on the contrary, also can the water resistance of resol be impacted simultaneously.In phenol resin solution, add coupling agent and mix the resol that the back discharging just obtains being used for the resin wheel tackiness agent.
Can know by such scheme; The present invention at first, adopts organic amine as catalyzer in order to improve the bond strength of resol; Because organic amine is volatile; The residual quantity of reaction back in resol is lower, and the organic amine that remains in the resol also can crosslinked and stable being present in the resin system take place with resol, meets water and ionizing event can not take place.Improve the water resistance of resol self thus, make resol have bond strength preferably for a long time, reduce the destructive force of water molecules resol and emery wheel bonding strength.Secondly, add coupling agent, improve the bond strength of resol and other materials to reacted resol.Therefore; One aspect of the present invention adopts organic amine to improve the water resistance of resol as catalyzer; Adopt coupling agent to improve the bond strength of resol and other materials on the other hand; Guarantee that thus resol can have higher bond strength for a long time, make resin wheel be difficult for causing performance degradation, prolonged the work-ing life of resin wheel because of the reduction of phenolic resin adhesion intensity at memory period.
The present invention also provides a kind of heat curing-type liquid phenolic resin, and its concentration of metal ions is no more than 100PPM, and it can prepare according to the method described above; Owing to be to adopt organic amine as catalyzer; Organic amine is volatile, and the residual quantity of reaction back in resol is lower, and the organic amine that remains in the resol also can crosslinked and stable being present in the resin system take place with resol; Therefore; This heat curing-type liquid phenolic is met water ionizing event can not take place, and can keep higher bonding strength for a long time, is suitable as the tackiness agent of resin wheel.
In order further to understand the present invention, below in conjunction with embodiment the preparation method who is used for the resol of resin wheel tackiness agent provided by the invention to be described, protection scope of the present invention is not limited by the following examples.Silane coupling agent in following examples by Nanjing forward chemical industry ltd provide.
Embodiment 1
With phenol 500g; Monoethanolamine MEA BASF catalyzer 10g drops into reactor drum, under atmospheric pressure state, reactant is warmed up to 80 ℃, and under 80 ℃ of temperature, adding concentration is 37% formaldehyde solution 517g; Added in 90 minutes; Keep 80 ℃ to react then, react after 2 hours, concentration of formaldehyde is 0.7% in the sampling detecting reactant; Vacuum distilling reaction solution, pressure are at 70mmHg, and Heating temperature is 38 ℃, are distilled to moisture content 9.2%, and viscosity 500cp25 ℃, be cooled to rapidly below 40 degree, add 1g silane coupling agent KH550, mixed discharging 1 hour.
The concentration that detects metals ion in the product is 36PPM.
Embodiment 2
With phenol 500g; Diethylolamine catalyzer 20g drops into reactor drum, under atmospheric pressure state, reactant is warmed up to 80 ℃, and under 80 ℃ of temperature, adding concentration is 37% formaldehyde solution 560g; Added in 60 minutes; Keep 80 ℃ to react then, react after 150 minutes, concentration of formaldehyde is 0.9% in the sampling detecting reactant; Vacuum distilling reaction solution, pressure are at 70mmHg, and Heating temperature is 42 ℃, are distilled to moisture content 12%, and viscosity 600cp25 ℃, be cooled to rapidly below 40 degree, add 5g silane coupling agent KH550, mixed discharging 1 hour.
The concentration that detects metals ion in the product is 57PPM.
Embodiment 3
With phenol 500g; Trolamine catalyzer 20g drops into reactor drum, under atmospheric pressure state, reactant is warmed up to 70 ℃, and under 70 ℃ of temperature, adding concentration is 37% formaldehyde solution 689.4g; Added in 120 minutes; Keep 80 ℃ to react then, react after 150 minutes, concentration of formaldehyde is less than being 1% in the sampling detecting reactant; Vacuum distilling reaction solution, pressure are at 70mmHg, and Heating temperature is 42 ℃, are distilled to moisture content 14%, and viscosity 1200cp25 ℃, be cooled to rapidly below 40 degree, add 2.5g silane coupling agent KH550, mixed discharging 1 hour.
The concentration that detects metals ion in the product is 87PPM.
Embodiment 4
With phenol 500g; Dimethyl ethanolamine catalyst 8g drops into reactor drum, under atmospheric pressure state, reactant is warmed up to 80 ℃, and under 80 ℃ of temperature, adding concentration is 37% formaldehyde solution 560g; Added in 60 minutes; Keep 85 ℃ to react then, react after 150 minutes, concentration of formaldehyde is 1.0% in the sampling detecting reactant; Vacuum distilling reaction solution, pressure are at 70mmHg, and Heating temperature is 35 ℃, are distilled to moisture content 12%, and viscosity 900cp25 ℃, be cooled to rapidly below 40 degree, add 2.5g silane coupling agent KH550, mixed discharging 1 hour.
The concentration that detects metals ion in the product is 64PPM.
Embodiment 5
With phenol 500g; Diglycolamine catalyzer 25g drops into reactor drum, under atmospheric pressure state, reactant is warmed up to 75 ℃, and under 75 ℃ of temperature, adding concentration is 37% formaldehyde solution 517g; Added in 90 minutes; Keep 80 ℃ to react then, react after 2 hours, concentration of formaldehyde is 0.7% in the sampling detecting reactant; Vacuum distilling reaction solution, pressure are at 70mmHg, and Heating temperature is 45 ℃, are distilled to moisture content 9.0%, and viscosity 600cp25 ℃, be cooled to rapidly below 40 degree, add 2g silane coupling agent KH550, mixed discharging 1 hour.
The concentration that detects metals ion in the product is 49PPM.
Comparative example 1
With phenol 500g; Sodium hydroxide catalyst 8g drops into reactor drum, under atmospheric pressure state, reactant is warmed up to 80 ℃, and under 80 ℃ of temperature, adding concentration is 37% formaldehyde solution 517g; Added in 90 minutes; Keep 80 ℃ to react then, react after 2 hours, concentration of formaldehyde is 0.7% in the sampling detecting reactant; Vacuum distilling reaction solution, pressure are at 70mmHg, and Heating temperature is 38 ℃, are distilled to moisture content 9.2%, and viscosity 600cp25 ℃, discharging.
The concentration that detects metals ion in the product is 55300PPM.
Take by weighing the embodiment 1～5 of equal in quality and the liquid phenolic resin of comparative example 1 preparation respectively; With the beautiful model of sending out F24 abrasive material that abrasive material ltd produces and holy well chemical industry and providing in itself and Zhengzhou is to be pressed into 8 word modules after the PF-2550 mixed with resin, and forming pressure is 6Mpa.Test the room temperature tensile strength of above-mentioned module, test result is listed in table 1.
Prepare same module according to the method described above respectively, in 25 ℃ of water, soak and take out its water-fast tensile strength of test after 7 days, test result is listed in table 1.
Table 1 resol The performance test results
Use the embodiment 1～5 and the resol of comparative example 1 preparation to prepare the resin wheel that model is 105 * 1 * 16mm as tackiness agent respectively, above-mentioned resin wheel is cut consume test, cutting material is a Φ 14mm round steel, 20 cuttves.Test result is listed in table 2.
Table 2 resin wheel cutting property test result
Can be known by The above results: existing resol has reduced by 46.13% in water-fast intensity, and the water-fast intensity maximum of resol of the present invention's preparation has reduced by 14.48%; Also further obtained proof through the emery wheel cutting test: existing resin flake grinding wheel performance has failed 48% after 30 days, and resin wheel maximum of the present invention has failed 20.7%; Existing resin flake grinding wheel performance has failed 60% after 60 days, and the emery wheel maximum of resin of the present invention has failed 24.6%.Hence one can see that, adopt resol provided by the invention as tackiness agent can improve resin wheel water resistance and fade resistance can, work-ing life is longer.
The explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (10)
1. a preparation method who is used for the resol of resin wheel tackiness agent is characterized in that, comprising:
Under the condition that the organic amine catalyzer exists, phenolic cpd and formaldehyde generation condensation reaction;
Add coupling agent after the mixture vacuum distilling that condensation reaction is obtained, obtain resol.
2. preparation method according to claim 1 is characterized in that, said organic amine catalyzer is a hydramine.
3. preparation method according to claim 2 is characterized in that, said hydramine is one or more in Monoethanolamine MEA BASF, diethylolamine, trolamine, dimethyl-hydramine, the diglycolamine.
4. preparation method according to claim 1 is characterized in that, said phenolic cpd is one or more in phenol, Resorcinol, meta-cresol, the p-tert-butylphenol.
5. preparation method according to claim 1 is characterized in that, said coupling agent is an organo silane coupling agent.
6. preparation method according to claim 1 is characterized in that, the weight ratio of said organic amine catalyzer and phenolic cpd is 100: (1～5).
7. preparation method according to claim 1 is characterized in that, the mol ratio of said phenolic cpd and formaldehyde is 1: (1～1.6).
8. preparation method according to claim 1 is characterized in that, the weight ratio of said phenolic cpd and coupling agent is 100: (0.1～1).
9. preparation method according to claim 1 is characterized in that, 70 ℃～85 ℃ of the temperature of said condensation reaction.
10. a heat curing-type liquid phenolic resin is characterized in that, its concentration of metal ions is no more than 100PPM.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103481210A (en) * | 2013-09-05 | 2014-01-01 | 宁波大华砂轮有限公司 | Adhesive for grinding wheel meshes and preparation method of adhesive |
| CN105885748A (en) * | 2014-10-27 | 2016-08-24 | 北京玻钢院复合材料有限公司 | Novel deposition-free environment-friendly heat-insulation material adhesive and preparation method thereof |
| CN106674454A (en) * | 2016-12-30 | 2017-05-17 | 珠海邦瑞合成材料有限公司 | Powdery phenolic resin for diamond grinding block and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1361190A (en) * | 2000-12-27 | 2002-07-31 | 中国科学院化学研究所 | Novolak phenolic resin and its prepn |
| US7642333B2 (en) * | 2007-05-21 | 2010-01-05 | Georgia-Pacific Chemicals Llc | Anhydride and resorcinol latent catalyst system for improving cure characteristics of phenolic resins |
| JP2010209216A (en) * | 2009-03-10 | 2010-09-24 | Sumitomo Bakelite Co Ltd | Phenol resin, resin composition for wet paper friction material, and wet paper friction material |
| CN102108275A (en) * | 2011-01-22 | 2011-06-29 | 上海泰尔精蜡有限公司 | Composite modification method for phenolic resin adhesive |
-
2011
- 2011-08-23 CN CN 201110243013 patent/CN102391448B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1361190A (en) * | 2000-12-27 | 2002-07-31 | 中国科学院化学研究所 | Novolak phenolic resin and its prepn |
| US7642333B2 (en) * | 2007-05-21 | 2010-01-05 | Georgia-Pacific Chemicals Llc | Anhydride and resorcinol latent catalyst system for improving cure characteristics of phenolic resins |
| JP2010209216A (en) * | 2009-03-10 | 2010-09-24 | Sumitomo Bakelite Co Ltd | Phenol resin, resin composition for wet paper friction material, and wet paper friction material |
| CN102108275A (en) * | 2011-01-22 | 2011-06-29 | 上海泰尔精蜡有限公司 | Composite modification method for phenolic resin adhesive |
Non-Patent Citations (1)
| Title |
|---|
| 杜植院等: "有机硅/ 酚醛树脂共混黏结剂在摩擦复合材料中的应用研究", 《非金属矿》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103481210A (en) * | 2013-09-05 | 2014-01-01 | 宁波大华砂轮有限公司 | Adhesive for grinding wheel meshes and preparation method of adhesive |
| CN103481210B (en) * | 2013-09-05 | 2016-03-09 | 宁波大华砂轮有限公司 | A kind of emery wheel mesh sheet bonding agent and preparation method thereof |
| CN105885748A (en) * | 2014-10-27 | 2016-08-24 | 北京玻钢院复合材料有限公司 | Novel deposition-free environment-friendly heat-insulation material adhesive and preparation method thereof |
| CN106674454A (en) * | 2016-12-30 | 2017-05-17 | 珠海邦瑞合成材料有限公司 | Powdery phenolic resin for diamond grinding block and preparation method thereof |
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