CN106832309B - Modified polyvinyl acetate and preparation process thereof - Google Patents
Modified polyvinyl acetate and preparation process thereof Download PDFInfo
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- CN106832309B CN106832309B CN201611238478.3A CN201611238478A CN106832309B CN 106832309 B CN106832309 B CN 106832309B CN 201611238478 A CN201611238478 A CN 201611238478A CN 106832309 B CN106832309 B CN 106832309B
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- modified polyvinyl
- polyvinyl acetate
- acetate
- vinyl acetate
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- 229920002689 polyvinyl acetate Polymers 0.000 title claims abstract description 62
- 239000011118 polyvinyl acetate Substances 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title description 5
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims abstract description 46
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 35
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 35
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000839 emulsion Substances 0.000 claims abstract description 32
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 26
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 26
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 229920002472 Starch Polymers 0.000 claims abstract description 18
- 239000008107 starch Substances 0.000 claims abstract description 18
- 235000019698 starch Nutrition 0.000 claims abstract description 18
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 14
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 14
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims abstract description 14
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 14
- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920001038 ethylene copolymer Polymers 0.000 claims abstract description 13
- 239000003999 initiator Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims description 24
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical group [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 7
- 230000035484 reaction time Effects 0.000 claims description 5
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 240000001398 Typha domingensis Species 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
- C08G81/02—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J187/00—Adhesives based on unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds
- C09J187/005—Block or graft polymers not provided for in groups C09J101/00 - C09J185/04
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paper (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polymerisation Methods In General (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention provides modified polyvinyl acetate which is prepared from the following raw materials in percentage by weight: 7-14 wt% of polyvinyl alcohol, 10-20 wt% of vinyl acetate, 3-5 wt% of dibutyl phthalate, 0.02-0.06 wt% of emulsifier, 0-0.5 wt% of sodium bicarbonate, 0-0.5 wt% of acrylic acid, 15-25 wt% of starch, 0.2-4 wt% of emulsified rosin, 0.02-0.2 wt% of initiator and the balance of water. The modified polyvinyl acetate provided by the invention utilizes the reaction of starch and vinyl acetate-ethylene copolymer emulsion, and utilizes emulsified rosin as a tackifier, so that the modified polyvinyl acetate is environment-friendly, stable in performance and strong in binding power to wood and paper.
Description
Technical Field
The invention belongs to the technical field of vinyl acetate, and particularly relates to modified polyvinyl acetate and a preparation process thereof.
Background
Vinyl acetate has C ═ C double bonds in the molecular structural formula, so that the chemical property is relatively active, the vinyl acetate and polyvinyl alcohol are generally polymerized by adding emulsifier to produce polyvinyl acetate emulsion in industry, but the problems of raw material cost, drying speed and initial viscosity of the polyvinyl acetate emulsion of cattail wool are difficult to be adapted to different requirements, and in order to solve the problems, the filling material and starch which do not pass through chemical reaction are generally added after primary polymerization. Because the raw materials have different specific gravities and different substances, the stability cannot be guaranteed, and the raw materials are layered, precipitated and mildewed in no more than three months in use.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide a modified polyvinyl acetate and a manufacturing process thereof, wherein the vinyl acetate provided by the present invention has strong adhesive strength and stability.
The invention provides modified polyvinyl acetate which is prepared from the following raw materials in percentage by weight:
7-14 wt% of polyvinyl alcohol, 10-20 wt% of vinyl acetate, 3-5 wt% of dibutyl phthalate, 0.02-0.06 wt% of emulsifier, 0-0.5 wt% of sodium bicarbonate, 0-0.5 wt% of acrylic acid, 15-25 wt% of starch, 0.2-4 wt% of emulsified rosin, 0.02-0.2 wt% of initiator and the balance of water.
Preferably, the emulsified rosin is prepared according to the following method:
and mixing dibutyl phthalate, rosin resin and OP-10 to obtain emulsified rosin.
Preferably, the mass ratio of the dibutyl phthalate to the rosin resin to the OP-10 is (40-65): (40-65): (2-5).
Preferably, the mixing temperature is 30-40 ℃ and the mixing time is more than 12 hours.
Preferably, the emulsifier is a condensate of an alkylphenol and ethylene oxide.
Preferably, the initiator is ammonium persulfate.
Preferably, the viscosity of the modified polyvinyl acetate is not less than 0.5pa · s.
The invention also provides a preparation process of the modified polyvinyl acetate, which comprises the following steps:
A) mixing water and polyvinyl alcohol, heating and dissolving to obtain a polyvinyl alcohol aqueous solution;
B) adding vinyl acetate, dibutyl phthalate, sodium bicarbonate, an emulsifier, acrylic acid and an initiator into the aqueous solution of the polyvinyl alcohol, and heating and dissolving to obtain a mixed emulsion;
C) dropwise adding vinyl acetate into the mixed emulsion to obtain vinyl acetate-ethylene copolymer emulsion;
D) mixing starch with the vinyl acetate-ethylene copolymer emulsion for reaction to obtain modified polyvinyl acetate emulsion;
E) and mixing the modified polyvinyl acetate emulsion with emulsified rosin for reaction to obtain the modified polyvinyl acetate.
Preferably, the reaction temperature in the step D) is 60-70 ℃, and the reaction time is 30-50 minutes.
Preferably, the reaction temperature of the step E) is 50-60 ℃, and the reaction time is 15-25 minutes.
Compared with the prior art, the invention provides modified polyvinyl acetate which is prepared from the following raw materials in percentage by weight: 7-14 wt% of polyvinyl alcohol, 10-20 wt% of vinyl acetate, 3-5 wt% of dibutyl phthalate, 0.02-0.06 wt% of emulsifier, 0-0.5 wt% of sodium bicarbonate, 0-0.5 wt% of acrylic acid, 15-25 wt% of starch, 0.2-4 wt% of emulsified rosin, 0.02-0.2 wt% of initiator and the balance of water. The modified polyvinyl acetate provided by the invention utilizes the reaction of starch and vinyl acetate-ethylene copolymer emulsion, and utilizes emulsified rosin as a tackifier, so that the modified polyvinyl acetate is environment-friendly, stable in performance and strong in binding power to wood and paper.
Detailed Description
The invention provides modified polyvinyl acetate which is prepared from the following raw materials in percentage by weight:
7-14 wt% of polyvinyl alcohol, 10-20 wt% of vinyl acetate, 3-5 wt% of dibutyl phthalate, 0.02-0.06 wt% of emulsifier, 0-0.5 wt% of sodium bicarbonate, 0-0.5 wt% of acrylic acid, 15-25 wt% of starch, 0.2-4 wt% of emulsified rosin, 0.02-0.2 wt% of initiator and the balance of water.
The modified polyvinyl acetate provided by the invention comprises 7-14 wt% of polyvinyl alcohol, preferably 8-12 wt%, and more preferably 9-11 wt%. The polyvinyl alcohol is preferably Chuanwei 1788 and/or Chuanwei 2092.
The modified polyvinyl acetate provided by the invention also comprises 10 wt% -20 wt% of vinyl acetate, preferably 12 wt% -18 wt%, and more preferably 14 wt% -16 wt%.
The modified polyvinyl acetate provided by the invention also comprises 3 wt% -5 wt% of dibutyl phthalate, and preferably 3.7 wt% -4.5 wt%.
The modified polyvinyl acetate provided by the invention also comprises 0.02 wt% -0.06 wt% of emulsifier, preferably 0.03 wt% -0.04 wt%. The emulsifier is preferably a condensate of an alkylphenol and ethylene oxide, more preferably OP-10.
The modified polyvinyl acetate provided by the invention also comprises 0 wt% -0.5 wt% of sodium bicarbonate, preferably 0.1 wt% -0.4 wt%, and more preferably 0.2 wt% -0.3 wt%.
The modified polyvinyl acetate provided by the invention also comprises 0 wt% -0.5 wt% of acrylic acid, preferably 0.1 wt% -0.4 wt%, and more preferably 0.2 wt% -0.3 wt%.
The modified polyvinyl acetate provided by the invention also comprises 15 wt% -25 wt% of starch, preferably 17 wt% -22 wt%, and more preferably 19 wt% -20 wt%.
The modified polyvinyl acetate provided by the invention also comprises 0.02 wt% -0.2 wt% of initiator, preferably 0.05 wt% -0.15 wt%, and more preferably 0.07 wt% -0.12 wt%. The initiator is preferably ammonium persulfate.
The modified polyvinyl acetate provided by the invention also comprises 0.2 wt% -4 wt% of emulsified rosin, preferably 0.5 wt% -3.5 wt%, and more preferably 1.0 wt% -3.0 wt%.
In the present invention, the emulsified rosin is preferably prepared as follows:
dibutyl phthalate, rosin resin and OP-10 are mixed and reacted to prepare emulsified rosin.
The mass ratio of the dibutyl phthalate to the rosin resin to the OP-10 is (40-65): (40-65): (2-5), preferably (50-60): (50-60): (2-4).
The temperature for mixing and reacting is 30-40 ℃, and the time is more than 12 hours.
The viscosity of the modified polyvinyl acetate is not less than 0.5 pa.s.
The invention also provides a preparation process of the modified polyvinyl acetate, which is characterized by comprising the following steps:
A) mixing water and polyvinyl alcohol, heating and dissolving to obtain a polyvinyl alcohol aqueous solution;
B) adding vinyl acetate, dibutyl phthalate, sodium bicarbonate, an emulsifier, acrylic acid and an initiator into the aqueous solution of the polyvinyl alcohol, and heating and dissolving to obtain a mixed emulsion;
C) dropwise adding vinyl acetate into the mixed emulsion to obtain vinyl acetate-ethylene copolymer emulsion;
D) mixing the starch with the vinyl acetate-ethylene copolymer emulsion for reaction to obtain modified polyvinyl acetate emulsion;
E) and mixing the modified polyvinyl acetate emulsion with emulsified rosin for reaction to obtain the modified polyvinyl acetate.
The invention firstly mixes water and polyvinyl alcohol, heats and dissolves them to obtain the aqueous solution of polyvinyl alcohol. The temperature for dissolving by heating is preferably 95 ℃.
After obtaining the aqueous solution of polyvinyl alcohol, cooling the aqueous solution of polyvinyl alcohol to below 60 ℃, adding vinyl acetate, dibutyl phthalate, sodium bicarbonate, an emulsifier, acrylic acid and an initiator into the aqueous solution of polyvinyl alcohol, and heating and dissolving to obtain a mixed emulsion. The temperature for dissolving by heating is preferably 75 ℃.
And then, dropwise adding vinyl acetate into the mixed emulsion to obtain vinyl acetate-ethylene copolymer emulsion.
Then, mixing the obtained vinyl acetate-ethylene copolymer emulsion with starch for reaction to obtain the modified polyvinyl acetate emulsion. The reaction temperature is preferably 60-70 ℃, and the reaction time is preferably 30-50 minutes.
And finally, mixing the modified polyvinyl acetate emulsion with emulsified rosin for reaction to obtain the modified polyvinyl acetate. The reaction temperature is preferably 50-60 ℃, and the reaction time is preferably 15-25 minutes.
The modified polyvinyl acetate provided by the invention utilizes the reaction of starch and vinyl acetate-ethylene copolymer emulsion, and utilizes emulsified rosin as a tackifier, so that the modified polyvinyl acetate is environment-friendly, stable in performance and strong in binding power to wood and paper.
For further understanding of the present invention, the modified polyvinyl acetate and the manufacturing process thereof provided by the present invention are described below with reference to the following examples, and the scope of the present invention is not limited by the following examples.
Example 1
Mixing the components in a mass ratio of 50: 50: 2, mixing and stirring the dibutyl phthalate, the rosin resin and the OP-10 for more than 12 hours at the temperature of 30-40 ℃ to obtain the emulsified rosin.
The formula of the modified polyvinyl acetate comprises the following components in percentage by weight: 178810% of polyvinyl alcohol Chuanyu, 15% of vinyl acetate, 3.0% of dibutyl phthalate, OP-100.03%, 0.2% of sodium bicarbonate, 0.35% of acrylic acid, 15% of starch, 1.0% of emulsified rosin prepared in example 1, 0.03% of ammonium persulfate and the balance of water.
A manufacturing process of modified polyvinyl acetate is characterized by comprising the following steps:
(1) adding 500kg of water and 70kg of polyvinyl alcohol into a reaction kettle, and heating to 95 ℃ to dissolve;
(2) cooling to below 60 ℃, adding 80kg of vinyl acetate and dibutyl phthalate: 12kg, 0.5kg of sodium bicarbonate, 1kg of a condensation product of alkylphenol and ethylene oxide, 1.6kg of acrylic acid and 0.3kg of ammonium persulfate;
(3) heating to 78 ℃ for dissolution, slowly dripping vinyl acetate after the reflux of a condenser, and reacting at 65 ℃ to prepare vinyl acetate-ethylene copolymer emulsion;
(4) adding 50kg of starch, reacting with the vinyl acetate-ethylene copolymer emulsion at 55 ℃ for 15min to prepare modified polyvinyl acetate emulsion, adding emulsified rosin, and adjusting the viscosity to obtain the modified polyvinyl acetate.
Example 2:
and (3) mixing the components in a mass ratio of 40: 60: 4, mixing and stirring the dibutyl phthalate, the rosin resin and the OP-10 for more than 12 hours at the temperature of 30-40 ℃ to obtain the emulsified rosin.
The formula of the modified polyvinyl acetate comprises the following components in percentage by weight: 209214% of polyvinyl alcohol Chuanyu, 12% of vinyl acetate, 4.0% of dibutyl phthalate, OP-100.02%, 0.1% of sodium bicarbonate, 0.25% of acrylic acid, 20% of starch, 1.5% of emulsified rosin prepared in example 2, 0.02% of ammonium persulfate and the balance of water.
Modified polyvinyl acetate was obtained according to the production process of example 1.
Example 3:
mixing the components in a mass ratio of 60: 45: 3, mixing and stirring the dibutyl phthalate, the rosin resin and the OP-10 for more than 12 hours at the temperature of 30-40 ℃ to obtain the emulsified rosin.
The formula of the modified polyvinyl acetate comprises the following components in percentage by weight: 178810% of polyvinyl alcohol Chuanyu, 18% of vinyl acetate, 3.0% of dibutyl phthalate, OP-100.05%, 0.3% of sodium bicarbonate, 0.3% of acrylic acid, 25% of starch, 0.8% of emulsified rosin prepared in example 3, 0.06% of ammonium persulfate and the balance of water.
Modified polyvinyl acetate was obtained according to the production process of example 1.
Example 4
The modified polyvinyl acetates obtained in examples 1 to 3 were subjected to adhesion strength and stability tests.
1) Adhesive strength
Performance measurements of the modified polyvinyl acetates of examples 1 to 3 were carried out according to the standards and methods provided in GB18583-2008 and Q/CXM 1-2015, and the results are shown in Table 1, where Table 1 shows the performance measurement results of the modified polyvinyl acetates of examples 1 to 3.
TABLE 1 measurement of Properties of modified polyvinyl acetates of examples 1 to 3
2) Stability of
The modified polyvinyl acetates prepared in examples 1 to 3 were left for different periods of time under natural conditions, and the results are shown in Table 2.
TABLE 2 stability of modified polyvinyl acetate in natural conditions
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The modified polyvinyl acetate is characterized by being prepared from the following raw materials in percentage by weight:
7-14 wt% of polyvinyl alcohol, 10-20 wt% of vinyl acetate, 3-5 wt% of dibutyl phthalate, 0.02-0.06 wt% of emulsifier, 0-0.5 wt% of sodium bicarbonate, 0-0.5 wt% of acrylic acid, 15-25 wt% of starch, 0.2-4 wt% of emulsified rosin, 0.02-0.2 wt% of initiator and the balance of water;
the emulsified rosin is prepared according to the following method:
mixing dibutyl phthalate, rosin resin and OP-10 to obtain emulsified rosin; the mass ratio of the dibutyl phthalate to the rosin resin to the OP-10 is (40-65): (40-65): (2-5); the mixing temperature is 30-40 ℃, and the mixing time is more than 12 hours.
2. The modified polyvinyl acetate according to claim 1, wherein the emulsifier is a condensate of an alkylphenol and ethylene oxide.
3. The modified polyvinyl acetate of claim 1 wherein the initiator is ammonium persulfate.
4. The modified polyvinyl acetate according to claim 1, wherein the viscosity of the modified polyvinyl acetate is not less than 0.5 pa-s.
5. A process for preparing the modified polyvinyl acetate of any one of claims 1 to 4, comprising the steps of:
A) mixing water and polyvinyl alcohol, heating and dissolving to obtain a polyvinyl alcohol aqueous solution;
B) adding vinyl acetate, dibutyl phthalate, sodium bicarbonate, an emulsifier, acrylic acid and an initiator into the aqueous solution of the polyvinyl alcohol, and heating and dissolving to obtain a mixed emulsion;
C) dripping vinyl acetate into the mixed emulsion to obtain vinyl acetate-ethylene copolymer emulsion;
D) mixing starch with the vinyl acetate-ethylene copolymer emulsion for reaction to obtain modified polyvinyl acetate emulsion;
E) and mixing the modified polyvinyl acetate emulsion with emulsified rosin for reaction to obtain the modified polyvinyl acetate.
6. The manufacturing process according to claim 5, wherein the reaction temperature in the step D) is 60-70 ℃ and the reaction time is 30-50 minutes.
7. The manufacturing process of claim 5, wherein the temperature of the reaction in the step E) is 50-60 ℃ and the time is 15-25 minutes.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1265410A (en) * | 2000-03-22 | 2000-09-06 | 华南农业大学 | Adhesive |
| CN103923581A (en) * | 2013-01-14 | 2014-07-16 | 上海吉妮乳胶厂 | Modified white latex |
| CN104130420A (en) * | 2014-07-03 | 2014-11-05 | 重庆市沙坪坝区尊越科技有限责任公司 | Formula for modified polyvinyl acetate and preparation process |
| CN104877063A (en) * | 2015-04-29 | 2015-09-02 | 苏州市湘园特种精细化工有限公司 | Polyvinyl acetate emulsion and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5130577B2 (en) * | 1972-08-05 | 1976-09-01 | ||
| JPH04185683A (en) * | 1990-11-21 | 1992-07-02 | Sekisui Chem Co Ltd | Production of polyvinyl acetate adhesive |
| CN102676091A (en) * | 2011-03-18 | 2012-09-19 | 国际人造丝公司 | Adhesive composition and application of adhesive composition |
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- 2016-12-28 CN CN201611238478.3A patent/CN106832309B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1265410A (en) * | 2000-03-22 | 2000-09-06 | 华南农业大学 | Adhesive |
| CN103923581A (en) * | 2013-01-14 | 2014-07-16 | 上海吉妮乳胶厂 | Modified white latex |
| CN104130420A (en) * | 2014-07-03 | 2014-11-05 | 重庆市沙坪坝区尊越科技有限责任公司 | Formula for modified polyvinyl acetate and preparation process |
| CN104877063A (en) * | 2015-04-29 | 2015-09-02 | 苏州市湘园特种精细化工有限公司 | Polyvinyl acetate emulsion and preparation method thereof |
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