CN105086884A - Modified white latex simulant - Google Patents
Modified white latex simulant Download PDFInfo
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- CN105086884A CN105086884A CN201410792106.XA CN201410792106A CN105086884A CN 105086884 A CN105086884 A CN 105086884A CN 201410792106 A CN201410792106 A CN 201410792106A CN 105086884 A CN105086884 A CN 105086884A
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- simulant
- white latex
- polyvinyl alcohol
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Abstract
The invention discloses a modified white latex simulant. The modified white latex simulant comprises polyvinyl alcohol, formaldehyde, butenal, urea, hydroxylamine hydrochloride, ammonium persulfate, stearic acid, wollastonite powder and deionized water. The modified white latex simulant has viscosity of 22Pa.s, bonding intensity of 5.2MPa and boiling water resistance of 20min. Unmodified white latex simulant has viscosity of 13Pa.s, bonding intensity of 3.7MPa and boiling water resistance of 10min. The modified white latex simulant has high bonding intensity close to white latex bonding intensity of 6.5MPa and has obviously improved creep resistance and heat resistance. The modified white latex simulant has the advantages of simple processes, no organic solvent, no toxicity, nonflammability, wide raw material sources and low price.
Description
Technical field
The present invention relates to a kind of sizing agent, white glue is imitated in especially a kind of modification.
Background technology
Sizing agent is indispensable material in production of cigarettes process.The sizing agent used in current domestic production of cigarettes is the white glue with vinyl of chemosynthesis mostly.White glue with vinyl is a kind of thermoplastic cement obtained through letex polymerization in dispersion medium using vinyl-acetic ester as main raw material, mainly containing Vinyl Acetate Copolymer homopolymerization emulsion (PVAC), vinyl acetate-ethylene copolymerization emulsions (VAE), Vinyl acetate-butyl acrylate copolymer emulsion (VAB) etc., is a kind of purposes sizing agent very widely.No matter which kind of white glue with vinyl, by the impact of the condition such as raw materials for production, operating procedure, monomer conversion can not reach 100%, and production cost is slightly high.In order to reduce costs, in recent years market has occurred the imitative white glue taking polyvinyl acetal as main component, JSF is that polyvinyl alcohol reacts with aldehydes the polymkeric substance produced in the presence of acidic.The feature of this kind of glue is that synthesis technique is simple, and glue is not containing organic solvent, nontoxic, nonflammable, raw material sources are wide, and price is lower, is applicable to the bonding of flexible material, and its main drawback to be bonding strength lower, particularly the rigidity of cured glue film, creep resistance and thermotolerance are poor.The present invention be with polyvinyl alcohol, aldehydes for raw material, add properties-correcting agent and other auxiliary agents and modification carried out to it, make its outward appearance similar to white glue with vinyl, for white sticks thick liquid, adhesive property is close to common white latex, and product cost is slightly higher than imitative white glue before modified, far below white glue with vinyl.
Summary of the invention
Though the object of the invention is to solve white glue with vinyl excellent property but cost is high; Although imitative white glue cost is low, the problem of the poor performance such as the rigidity of bonding strength, glued membrane, creep resistance and thermotolerance.
The technical solution used in the present invention is: white glue is imitated in a kind of modification, comprise component polyvinyl alcohol, formaldehyde, crotonaldehyde, urea, oxammonium hydrochloride, ammonium persulphate, stearic acid, wollastonite powder and deionized water, each component in mass ratio example is: 100:68:7:25:0.1:0.5:0.8:35:890; Making step:
(1) in the reactor with reflux exchanger and agitator, first add deionized water, polyvinyl alcohol, rise to 88-92 DEG C with the temperature rise rate of 2-2.5 DEG C/min from room temperature, stir 30-60min and polyvinyl alcohol is dissolved completely, stir 1.5-2h again, make it mix and obtain mixed solution;
(2) in step 1, mixed solution adds formaldehyde, crotonaldehyde, and after stirring 20-30min, add appropriate hydrochloric acid (10%), being adjusted to pH value is 2-3;
(3) keep temperature of reaction kettle to be 88-92 DEG C, reaction is until stopped reaction when having foam to occur and produce aldehyde water isolate at this temperature, and being adjusted to pH value with appropriate sodium hydroxide solution (30%) is 7-8;
(4) urea, oxammonium hydrochloride, ammonium persulphate stirring 60-70min is added;
(5) be cooled to 40-45 DEG C, add stearic acid, wollastonite powder, stir 50-70min, make it mix, namely making outward appearance is milky thickness glue, is packaged as finished product after filtration.
The invention has the beneficial effects as follows: modified imitative white glue emulsion viscosity is 22Pas, bonding strength 5.2MPa, resistance to boiling water 20min, (imitative white glue emulsion viscosity is before modified 13Pas, bonding strength 3.7MPa, resistance to boiling water 10min), its bonding strength obviously strengthens, close to white glue with vinyl strength of joint 6.5MPa, creep resistance and thermotolerance are obviously improved.Its synthesis technique is simple, and glue is not containing organic solvent, nontoxic, nonflammable, and raw material sources are wide, and price is lower.
Embodiment
Embodiment 1
(1) in the reactor with reflux exchanger and agitator, first add deionized water 890kg, polyvinyl alcohol 100kg, 88-92 DEG C is risen to from room temperature with the temperature rise rate of 2-2.5 DEG C/min, stirring 30-60min makes polyvinyl alcohol dissolve completely, stir 1.5-2h again, make it mix and obtain mixed solution;
(2) in step 1, mixed solution adds formaldehyde 68kg, crotonaldehyde 7kg, and after stirring 20-30min, add appropriate hydrochloric acid (10%), being adjusted to pH value is 2-3;
(3) keep temperature of reaction kettle to be 88-92 DEG C, reaction is until stopped reaction when having foam to occur and produce aldehyde water isolate at this temperature, and being adjusted to pH value with appropriate sodium hydroxide solution (30%) is 7-8;
(4) add urea 25kg, oxammonium hydrochloride 0.1kg, ammonium persulphate 0.5kg stirs 60-70min;
(5) be cooled to 40-45 DEG C, add stearic acid 0.8kg, wollastonite powder 35kg, stir 50-70min, make it mix, namely making outward appearance is milky thickness glue, is packaged as finished product after filtration.
Embodiment 2
(1) in the reactor with reflux exchanger and agitator, first add deionized water 930kg, polyvinyl alcohol 100kg, 88-92 DEG C is risen to from room temperature with the temperature rise rate of 2-2.5 DEG C/min, stirring 30-60min makes polyvinyl alcohol dissolve completely, stir 1.5-2h again, make it mix and obtain mixed solution;
(2) in step 1, mixed solution adds formaldehyde 72kg, crotonaldehyde 9kg, and after stirring 20-30min, add appropriate hydrochloric acid (10%), being adjusted to pH value is 2-3;
(3) keep temperature of reaction kettle to be 88-92 DEG C, reaction is until stopped reaction when having foam to occur and produce aldehyde water isolate at this temperature, and being adjusted to pH value with appropriate sodium hydroxide solution (30%) is 7-8;
(4) add urea 28kg, oxammonium hydrochloride 0.2kg, ammonium persulphate 0.8kg stirs 60-70min;
(5) be cooled to 40-45 DEG C, add stearic acid 1.2kg, wollastonite powder 47kg, stir 50-70min, make it mix, namely making outward appearance is milky thickness glue, is packaged as finished product after filtration.
Embodiment 3
(1) in the reactor with reflux exchanger and agitator, first add deionized water 960kg, polyvinyl alcohol 100kg, 88-92 DEG C is risen to from room temperature with the temperature rise rate of 2-2.5 DEG C/min, stirring 30-60min makes polyvinyl alcohol dissolve completely, stir 1.5-2h again, make it mix and obtain mixed solution;
(2) in step 1, mixed solution adds formaldehyde 78kg, crotonaldehyde 13kg, and after stirring 20-30min, add appropriate hydrochloric acid (10%), being adjusted to pH value is 2-3;
(3) keep temperature of reaction kettle to be 88-92 DEG C, reaction is until stopped reaction when having foam to occur and produce aldehyde water isolate at this temperature, and being adjusted to pH value with appropriate sodium hydroxide solution (30%) is 7-8;
(4) add urea 35kg, oxammonium hydrochloride 0.28kg, ammonium persulphate 1.2kg stirs 60-70min;
(5) be cooled to 40-45 DEG C, add stearic acid 1.5kg, wollastonite powder 56kg, stir 50-70min, make it mix, namely making outward appearance is milky thickness glue, is packaged as finished product after filtration.
Above embodiments of the present invention are described, but the invention is not restricted to above-mentioned embodiment, in the ken that art those of ordinary skill possesses, can also make a variety of changes under the prerequisite not departing from present inventive concept.
Claims (1)
1. white glue is imitated in a modification, it is characterized in that comprising component polyvinyl alcohol, formaldehyde, crotonaldehyde, urea, oxammonium hydrochloride, ammonium persulphate, stearic acid, wollastonite powder and deionized water, each component in mass ratio example is: 100:68:7:25:0.1:0.5:0.8:35:890; Making step:
(1) in the reactor with reflux exchanger and agitator, first add deionized water, polyvinyl alcohol, rise to 88-92 DEG C with the temperature rise rate of 2-2.5 DEG C/min from room temperature, stir 30-60min and polyvinyl alcohol is dissolved completely, stir 1.5-2h again, make it mix and obtain mixed solution;
(2) in step 1, mixed solution adds formaldehyde, crotonaldehyde, and after stirring 20-30min, add appropriate hydrochloric acid (10%), being adjusted to pH value is 2-3;
(3) keep temperature of reaction kettle to be 88-92 DEG C, reaction is until stopped reaction when having foam to occur and produce aldehyde water isolate at this temperature, and being adjusted to pH value with appropriate sodium hydroxide solution (30%) is 7-8;
(4) urea, oxammonium hydrochloride, ammonium persulphate stirring 60-70min is added;
(5) be cooled to 40-45 DEG C, add stearic acid, wollastonite powder, stir 50-70min, make it mix, namely making outward appearance is milky thickness glue, is packaged as finished product after filtration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410792106.XA CN105086884A (en) | 2014-12-19 | 2014-12-19 | Modified white latex simulant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410792106.XA CN105086884A (en) | 2014-12-19 | 2014-12-19 | Modified white latex simulant |
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| CN105086884A true CN105086884A (en) | 2015-11-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112662098A (en) * | 2020-12-08 | 2021-04-16 | 湖北魔洗高新材料制品有限公司 | Preparation method of PVA collodion cotton head with good water absorption |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1685029A (en) * | 2002-09-26 | 2005-10-19 | 舒飞士特钟化工有限公司 | Removable, water-whitening resistant pressure sensitive adhesives |
| CN101519483A (en) * | 2008-04-30 | 2009-09-02 | 北京化工大学 | Novel environment-friendly urea-formaldehyde resin and preparation method thereof |
-
2014
- 2014-12-19 CN CN201410792106.XA patent/CN105086884A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1685029A (en) * | 2002-09-26 | 2005-10-19 | 舒飞士特钟化工有限公司 | Removable, water-whitening resistant pressure sensitive adhesives |
| CN101519483A (en) * | 2008-04-30 | 2009-09-02 | 北京化工大学 | Novel environment-friendly urea-formaldehyde resin and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 郭立强: "聚乙烯醇缩丁烯醛胶粘剂的改性研究", 《中国胶粘剂》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112662098A (en) * | 2020-12-08 | 2021-04-16 | 湖北魔洗高新材料制品有限公司 | Preparation method of PVA collodion cotton head with good water absorption |
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Application publication date: 20151125 |
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