WO2017049696A1 - Acrylic ester copolymer emulsion for high-adhesion heavy-duty anticorrosion coating, and preparation method therefor - Google Patents
Acrylic ester copolymer emulsion for high-adhesion heavy-duty anticorrosion coating, and preparation method therefor Download PDFInfo
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- WO2017049696A1 WO2017049696A1 PCT/CN2015/092623 CN2015092623W WO2017049696A1 WO 2017049696 A1 WO2017049696 A1 WO 2017049696A1 CN 2015092623 W CN2015092623 W CN 2015092623W WO 2017049696 A1 WO2017049696 A1 WO 2017049696A1
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/06—Hydrocarbons
- C08F212/08—Styrene
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
Definitions
- the invention relates to an acrylate copolymer emulsion and a preparation method thereof, in particular to a preparation method of an acrylate copolymer emulsion for a high adhesion heavy anti-corrosion coating.
- Metallic materials are one of the most versatile materials involved in all areas of civil and military work. However, metal materials are easily corroded, and annual metal damage has caused huge losses to national life and the economy. In general, it is a feasible method to coat a polymer film on a metal surface. The polymer film can prevent the contact of the metal material with oxygen and water vapor, and isolate the conditions generated by the corrosion. However, it is difficult to achieve an effective combination of a general polymer material and a metal surface, and it may fall off when a mechanical external force or a coating time is long, and it is difficult to continue the anticorrosive effect.
- the acrylate copolymer emulsion for high adhesion heavy-duty anticorrosive coating according to the present invention is composed of the following raw materials by weight ratio: 55-60 parts of butyl acrylate, 80-90 parts of styrene, methyl 25-30 parts of methyl acrylate, 15-20 parts of methyl acrylate, 1-2 parts of acrylic acid, 0.5-1 part of initiator, 4-6 parts of emulsifier, 200-250 parts of deionized water, pH adjuster 0.0001-0.0002 Parts and filming aids 5-10 parts.
- the emulsifier is any one of sodium lauryl sulfate or sodium dodecylbenzenesulfonate.
- the initiator is any one of ammonium persulfate or sodium persulfate.
- the pH adjusting agent is ammonia water or sodium hydroxide.
- the film forming aid is ethylene glycol monobutyl ether.
- the invention also discloses a preparation method of the above acrylate copolymer emulsion for high adhesion heavy anti-corrosion coating, comprising the following steps:
- the reactor is charged with 100-120 parts of deionized water and 1-2 parts of emulsifier, and stirred until dissolved;
- Initiator dripping tank is charged with all initiator and 10-15 parts of deionized water, stirred until dissolved, to prepare an initiator solution;
- pre-emulsification dropping tank into the remaining emulsifier and deionized water, stirring until dissolved, all the monomers are put into the pre-emulsified dropping tank, and the stirring pre-emulsification is continued for at least 30 minutes to prepare a pre-emulsion;
- the invention has the advantages that the acrylate copolymer emulsion is prepared by a semi-continuous dropping method, and the obtained acrylate copolymer emulsion has good water resistance, salt spray resistance and salt water resistance, and the emulsion of the invention is suitable for preparation of waterborne heavy anti-corrosion coating. Excellent anti-corrosion effect can be achieved.
- An acrylate copolymer emulsion for high adhesion heavy-duty anticorrosive coating consisting of the following raw materials by weight:
- the obtained emulsion performance indicators are as follows:
- Viscosity (mPa ⁇ s): 25.9;
- Adhesion Level 1;
- An acrylate copolymer emulsion for high adhesion heavy-duty anticorrosive coating consisting of the following raw materials by weight:
- the obtained emulsion performance indicators are as follows:
- Viscosity (mPa ⁇ s): 23.5;
- Adhesion Level 1;
- An acrylate copolymer emulsion for high adhesion heavy-duty anticorrosive coating consisting of the following raw materials by weight:
- the obtained emulsion performance indicators are as follows:
- Viscosity (mPa ⁇ s): 25.7;
- Adhesion Level 1;
- the invention adopts a semi-continuous dropping method to prepare an acrylate copolymer emulsion, and the obtained acrylate copolymer emulsion has good water resistance, salt spray resistance and salt water resistance, and the emulsion of the invention is suitable for preparation of aqueous heavy anti-corrosion coating, and can achieve excellent Antiseptic effect.
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Abstract
An acrylic ester copolymer emulsion for a high-adhesion heavy-duty anticorrosion coating consists of the following raw materials in parts by proportion: 55 to 60 parts of butyl acrylate, 80 to 90 parts of styrene, 25 to 30 parts of methyl methacrylate, 15 to 20 parts of methyl acrylate, 1 to 2 parts of acrylic acid, 0.5 to 1 part of initiator, 4 to 6 parts of emulsifier, 200 to 250 parts of deionized water, 0.0001 to 0.0002 part of pH regulator, and 5 to 10 parts of film coalescing aid. The method for preparing the emulsion comprises: mixing deionized water and part of emulsifier in a reaction vessel; then separately preparing an initiator solution and a pre-emulsification solution; and finally, dropwise adding the initiator solution and the pre-emulsification solution into the reaction vessel, and increasing a temperature. The emulsion prepared by means of a semi-continuously dropwise adding mode has good water resistance, salt spray resistance and saline water resistance, is suitable for preparing a water-based heavy-duty anticorrosion coating and has a good anticorrosion effect.
Description
本发明涉及一种丙烯酸酯共聚乳液及其制备方法，具体涉及一种高附着力重防腐涂料用丙烯酸酯共聚乳液的制备方法。The invention relates to an acrylate copolymer emulsion and a preparation method thereof, in particular to a preparation method of an acrylate copolymer emulsion for a high adhesion heavy anti-corrosion coating.
金属材料是用途最广泛的材料之一，涉及到民用和军工的各个领域。但是金属材料易被腐蚀，每年因为金属的腐蚀给国民生活以及经济带来了巨大的损失。一般情况下，在金属表面涂覆高分子膜是比较可行的方法，高分子膜可以阻止金属材料与氧气、水汽的接触，隔绝腐蚀产生的条件。但是，一般的高分子材料与金属表面难以达到有效的结合，在发生机械外力或者涂覆时间较长的情况下会发生脱落，难以继续达到防腐的效果。Metallic materials are one of the most versatile materials involved in all areas of civil and military work. However, metal materials are easily corroded, and annual metal damage has caused huge losses to national life and the economy. In general, it is a feasible method to coat a polymer film on a metal surface. The polymer film can prevent the contact of the metal material with oxygen and water vapor, and isolate the conditions generated by the corrosion. However, it is difficult to achieve an effective combination of a general polymer material and a metal surface, and it may fall off when a mechanical external force or a coating time is long, and it is difficult to continue the anticorrosive effect.
目前水性涂料仍然属于新兴的产业，市面上的水性涂料鱼龙混杂，质量也良莠不齐，而大部分涂料都在使用一年之后会有不同程度的脱落剥离，而其中重防腐用的高分子乳液则是关键点。针对以上的几个问题，我们设计了一种高附着力的重防腐涂料用丙烯酸酯共聚乳液，具有优良的防腐性能。At present, water-based paints are still in the emerging industry. The water-based paints on the market are mixed and the quality is also mixed. Most of the paints will have different degrees of peeling and peeling after one year of use, and the polymer emulsion for heavy-duty anti-corrosion is the key. point. In response to the above problems, we have designed a high adhesion anti-corrosion coating acrylate copolymer emulsion with excellent corrosion resistance.
发明内容Summary of the invention
发明目的：本发明现有技术中的针对不足，提出一种具有良好的耐水性、耐盐雾、耐盐水性，适用于水性重防腐涂料的制备，可以达到优良的防腐效果的高附着力重防腐涂料用丙烯酸酯共聚乳液的制备方法。OBJECT OF THE INVENTION: In view of the deficiencies in the prior art of the present invention, it is proposed to have a good water resistance, salt spray resistance, salt water resistance, and is suitable for preparation of aqueous heavy-duty anti-corrosion coatings, and can achieve high anti-corrosion effect and high adhesion force. A method for preparing an acrylate copolymer emulsion for anticorrosive coatings.
技术方案：本发明所述的一种高附着力重防腐涂料用丙烯酸酯共聚乳液，由如下重量份数的原料配比组成：丙烯酸丁酯55-60份、苯乙烯80-90份、甲基丙烯酸甲酯25-30份、丙烯酸甲酯15-20份、丙烯酸1-2份、引发剂0.5-1份、乳化剂4-6份、去离子水200-250份、pH调节剂0.0001-0.0002份、成膜助剂5-10份。Technical Solution: The acrylate copolymer emulsion for high adhesion heavy-duty anticorrosive coating according to the present invention is composed of the following raw materials by weight ratio: 55-60 parts of butyl acrylate, 80-90 parts of styrene, methyl 25-30 parts of methyl acrylate, 15-20 parts of methyl acrylate, 1-2 parts of acrylic acid, 0.5-1 part of initiator, 4-6 parts of emulsifier, 200-250 parts of deionized water, pH adjuster 0.0001-0.0002 Parts and filming aids 5-10 parts.
进一步的，所述的乳化剂为十二烷基硫酸钠或十二烷基苯磺酸钠中的任意一种。Further, the emulsifier is any one of sodium lauryl sulfate or sodium dodecylbenzenesulfonate.
进一步的，所述的引发剂为过硫酸铵或者过硫酸钠中的任意一种。Further, the initiator is any one of ammonium persulfate or sodium persulfate.
进一步的，所述的pH调节剂为氨水或者氢氧化钠。Further, the pH adjusting agent is ammonia water or sodium hydroxide.
进一步的，所述的成膜助剂为乙二醇单丁醚。Further, the film forming aid is ethylene glycol monobutyl ether.
本发明还公开了上述一种高附着力重防腐涂料用丙烯酸酯共聚乳液的制备方法，包括如下步骤：The invention also discloses a preparation method of the above acrylate copolymer emulsion for high adhesion heavy anti-corrosion coating, comprising the following steps:
(1)反应釜投入100-120份去离子水和1-2份乳化剂，搅拌至溶解；(1) The reactor is charged with 100-120 parts of deionized water and 1-2 parts of emulsifier, and stirred until dissolved;
(2)引发剂滴加罐投入全部引发剂和10-15份去离子水，搅拌至溶解，制得引发剂溶液；
(2) Initiator dripping tank is charged with all initiator and 10-15 parts of deionized water, stirred until dissolved, to prepare an initiator solution;
(3)预乳化滴加罐投入剩余乳化剂和去离子水，搅拌至溶解，将全部单体投入预乳化滴加罐，持续开启搅拌预乳化至少30min，制得预乳化液；(3) pre-emulsification dropping tank into the remaining emulsifier and deionized water, stirring until dissolved, all the monomers are put into the pre-emulsified dropping tank, and the stirring pre-emulsification is continued for at least 30 minutes to prepare a pre-emulsion;
(4)用氮气充分置换反应釜中的空气，至少置换2次；(4) sufficiently replacing the air in the reaction vessel with nitrogen, at least 2 times;
(5)反应釜搅拌开启，保持常压，升温至80-85℃，加入20％的预乳化液和30％的引发剂溶液，反应时间1h；(5) stirring the reactor, maintaining normal pressure, heating to 80-85 ° C, adding 20% pre-emulsion and 30% initiator solution, reaction time 1h;
(4)保持温度不变，滴加剩余预乳化液和引发剂溶液，滴加时间为3h；(4) keep the temperature unchanged, add the remaining pre-emulsion and initiator solution, the dropping time is 3h;
(5)保持温度不变，保温反应1h；(5) keep the temperature unchanged, the heat preservation reaction for 1h;
(6)降温至常温，用PH调节剂调节PH至7-8，加入成膜助剂，用100目过滤网过滤即得高附着力重防腐涂料用丙烯酸酯共聚乳液。(6) Cooling to normal temperature, adjusting the pH to 7-8 with a pH adjuster, adding a film-forming auxiliary agent, and filtering with a 100-mesh filter to obtain an acrylate copolymer emulsion for a high adhesion heavy-duty anti-corrosion coating.
有益效果：本发明采用半连续滴加方式制备丙烯酸酯共聚乳液，得到的丙烯酸酯共聚乳液具有良好的耐水性、耐盐雾、耐盐水性，本发明的乳液适用于水性重防腐涂料的制备，可以达到优良的防腐效果。The invention has the advantages that the acrylate copolymer emulsion is prepared by a semi-continuous dropping method, and the obtained acrylate copolymer emulsion has good water resistance, salt spray resistance and salt water resistance, and the emulsion of the invention is suitable for preparation of waterborne heavy anti-corrosion coating. Excellent anti-corrosion effect can be achieved.
下面结合具体实施例对本发明作进一步说明：The present invention will be further described below in conjunction with specific embodiments:
实施例1Example 1
一种高附着力重防腐涂料用丙烯酸酯共聚乳液，由如下重量份数的原料配比组成：An acrylate copolymer emulsion for high adhesion heavy-duty anticorrosive coating consisting of the following raw materials by weight:
具体操作过程：将10kg的十二烷基硫酸钠溶于600kg去离子水，投入预乳化罐，加入全部单体，持续开启搅拌预乳化至少30min。将4kg过硫酸钠溶于70kg去离子水中，投入引发剂罐，将16kg十二烷基硫酸钠溶于650kg去离子水中，投入反应釜，开启搅拌，用氮气充分置换反应釜中的空气，至少置换2次。保持常压，升温至80-85℃，加入20％的预乳化液和30％的引发剂溶液，反应时间1h。保持温度不变，滴加预乳化液和引发剂，滴加时间为3h。保持温度不变，保温反应1h。降温至常温，用PH调节剂调节PH至7-8，加入40kg乙二醇丁醚，用100目过滤网过滤即得高附着力重防腐涂料用丙烯酸酯共聚乳液。Specific operation process: 10kg of sodium lauryl sulfate is dissolved in 600kg of deionized water, put into the pre-emulsion tank, all monomers are added, and the pre-emulsification is continued for at least 30min. Dissolve 4kg of sodium persulfate in 70kg of deionized water, put into the initiator tank, dissolve 16kg of sodium lauryl sulfate in 650kg of deionized water, put into the reaction kettle, start stirring, and fully replace the air in the reactor with nitrogen, at least Replace 2 times. Maintain normal pressure, heat to 80-85 ° C, add 20% pre-emulsion and 30% initiator solution, reaction time 1h. Keep the temperature constant, add the pre-emulsion and the initiator dropwise, and the dropping time is 3h. Keep the temperature constant and keep the reaction for 1 h. The temperature was lowered to normal temperature, the pH was adjusted to 7-8 with a pH adjuster, 40 kg of ethylene glycol butyl ether was added, and the filter was filtered through a 100 mesh filter to obtain an acrylate copolymer emulsion for a high adhesion heavy-duty anticorrosive coating.
所得乳液性能指标如下：The obtained emulsion performance indicators are as follows:
固含量(％)：45.3％；Solid content (%): 45.3%;
粘度(mPa·s)：25.9；Viscosity (mPa·s): 25.9;
表面张力(mN/m)：45.5；Surface tension (mN/m): 45.5;
稀释稳定性：通过；Dilution stability: pass;
存储稳定性：1年；Storage stability: 1 year;
附着力：1级；Adhesion: Level 1;
耐水性：1级；Water resistance: Grade 1;
耐盐水：>800h；Salt water resistance: >800h;
耐盐雾：>800h。Salt spray resistance: >800h.
实施例2Example 2
一种高附着力重防腐涂料用丙烯酸酯共聚乳液，由如下重量份数的原料配比组成：An acrylate copolymer emulsion for high adhesion heavy-duty anticorrosive coating consisting of the following raw materials by weight:
具体操作过程：将12kg的十二烷基苯磺酸钠溶于600kg去离子水，投入预乳化罐，加入全部单体，持续开启搅拌预乳化至少30min。将4kg过硫酸铵溶于70kg去离子水中，投入引发剂罐，将14kg十二烷基苯磺酸钠溶于650kg去离子水中，投入反应釜，开启搅拌，用氮气充分置换反应釜中的空气，至少置换2次。保持常压，升温至80-85℃，加入20％的预乳化液和30％的引发剂溶液，反应时间1h。保持温度不变，滴加预乳化液和引发剂，滴加时间为3h。保持温度不变，保温反应1h。降温至常温，用PH调节剂调节PH至7-8，加入30kg乙二醇丁醚，用100目过滤网过滤即得高附着力重防腐涂料用丙烯酸酯共聚乳液。Specific operation process: 12 kg of sodium dodecylbenzene sulfonate is dissolved in 600 kg of deionized water, put into a pre-emulsion tank, all monomers are added, and the pre-emulsification is continued for at least 30 min. Dissolve 4kg of ammonium persulfate in 70kg of deionized water, put it into the initiator tank, dissolve 14kg of sodium dodecylbenzene sulfonate in 650kg of deionized water, put it into the reaction kettle, turn on the stirring, and fully replace the air in the reactor with nitrogen. , at least 2 times. Maintain normal pressure, heat to 80-85 ° C, add 20% pre-emulsion and 30% initiator solution, reaction time 1h. Keep the temperature constant, add the pre-emulsion and the initiator dropwise, and the dropping time is 3h. Keep the temperature constant and keep the reaction for 1 h. The temperature was lowered to normal temperature, the pH was adjusted to 7-8 with a pH adjuster, 30 kg of ethylene glycol butyl ether was added, and the filter was filtered through a 100 mesh filter to obtain an acrylate copolymer emulsion for a high adhesion heavy-duty anticorrosive coating.
所得乳液性能指标如下：The obtained emulsion performance indicators are as follows:
固含量(％)：45.6％；Solid content (%): 45.6%;
粘度(mPa·s)：23.5；Viscosity (mPa·s): 23.5;
表面张力(mN/m)：46.4；Surface tension (mN/m): 46.4;
稀释稳定性：通过；Dilution stability: pass;
存储稳定性：1年；Storage stability: 1 year;
附着力：1级；Adhesion: Level 1;
耐水性：1级；Water resistance: Grade 1;
耐盐水：>800h；Salt water resistance: >800h;
耐盐雾：>800h。Salt spray resistance: >800h.
实施例3Example 3
一种高附着力重防腐涂料用丙烯酸酯共聚乳液，由如下重量份数的原料配比组成：An acrylate copolymer emulsion for high adhesion heavy-duty anticorrosive coating consisting of the following raw materials by weight:
具体操作过程：将10kg的十二烷基硫酸钠溶于600kg去离子水，投入预乳化罐，加入全部单体，持续开启搅拌预乳化至少30min。将4kg过硫酸铵溶于70kg去离子水中，投入引发剂罐，将16kg十二烷基硫酸钠溶于650kg去离子水中，投入反应釜，开启搅拌，用氮气充分置换反应釜中的空气，至少置换2次。保持常压，升温至80-85℃，加入20％的预乳化液和30％的引发剂溶液，反应时间1h。保持温度不变，滴加预乳化液和引发剂，滴加时间为3h。保持温度不变，保温反应1h。降温至常温，用PH调节剂调节PH至7-8，加入40kg乙二醇丁醚，用100目过滤网过滤即得高附着力重防腐涂料用丙烯酸酯共聚乳液。Specific operation process: 10kg of sodium lauryl sulfate is dissolved in 600kg of deionized water, put into the pre-emulsion tank, all monomers are added, and the pre-emulsification is continued for at least 30min. Dissolve 4 kg of ammonium persulfate in 70 kg of deionized water, put into the initiator tank, dissolve 16 kg of sodium lauryl sulfate in 650 kg of deionized water, put into the reaction kettle, start stirring, and fully replace the air in the reaction vessel with nitrogen, at least Replace 2 times. Maintain normal pressure, heat to 80-85 ° C, add 20% pre-emulsion and 30% initiator solution, reaction time 1h. Keep the temperature constant, add the pre-emulsion and the initiator dropwise, and the dropping time is 3h. Keep the temperature constant and keep the reaction for 1 h. The temperature was lowered to normal temperature, the pH was adjusted to 7-8 with a pH adjuster, 40 kg of ethylene glycol butyl ether was added, and the filter was filtered through a 100 mesh filter to obtain an acrylate copolymer emulsion for a high adhesion heavy-duty anticorrosive coating.
所得乳液性能指标如下：The obtained emulsion performance indicators are as follows:
固含量(％)：45.2％；Solid content (%): 45.2%;
粘度(mPa·s)：25.7；Viscosity (mPa·s): 25.7;
表面张力(mN/m)：44.9；Surface tension (mN/m): 44.9;
稀释稳定性：通过；Dilution stability: pass;
存储稳定性：1年；Storage stability: 1 year;
耐水性：1级；Water resistance: Grade 1;
附着力：1级；Adhesion: Level 1;
耐盐水：>800h；Salt water resistance: >800h;
耐盐雾：>800h。Salt spray resistance: >800h.
本发明采用半连续滴加方式制备丙烯酸酯共聚乳液，得到的丙烯酸酯共聚乳液具有良好的耐水性、耐盐雾、耐盐水性，本发明的乳液适用于水性重防腐涂料的制备，可以达到优良
的防腐效果。The invention adopts a semi-continuous dropping method to prepare an acrylate copolymer emulsion, and the obtained acrylate copolymer emulsion has good water resistance, salt spray resistance and salt water resistance, and the emulsion of the invention is suitable for preparation of aqueous heavy anti-corrosion coating, and can achieve excellent
Antiseptic effect.
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。
The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention. The skilled person can make some modifications or modifications to the equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention, but the present invention does not deviate from the technical solution of the present invention. Technical Substantials Any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the technical solutions of the present invention.
Claims (6)
- 一种高附着力重防腐涂料用丙烯酸酯共聚乳液，其特征在于：由如下重量份数的原料配比组成：丙烯酸丁酯55-60份、苯乙烯80-90份、甲基丙烯酸甲酯25-30份、丙烯酸甲酯15-20份、丙烯酸1-2份、引发剂0.5-1份、乳化剂4-6份、去离子水200-250份、pH调节剂0.0001-0.0002份、成膜助剂5-10份。The invention relates to an acrylate copolymer emulsion for high adhesion heavy-duty anticorrosive coating, which is characterized by the following raw materials by weight ratio: 55-60 parts of butyl acrylate, 80-90 parts of styrene, and methyl methacrylate 25 -30 parts, 15-20 parts of methyl acrylate, 1-2 parts of acrylic acid, 0.5-1 part of initiator, 4-6 parts of emulsifier, 200-250 parts of deionized water, 0.0001-0.0002 parts of pH adjuster, film formation 5-10 parts of auxiliary.
- 根据权利要求1所述的一种高附着力重防腐涂料用丙烯酸酯共聚乳液，其特征在于：所述的乳化剂为十二烷基硫酸钠或十二烷基苯磺酸钠中的任意一种。The acrylate copolymer emulsion for a high adhesion heavy-duty anticorrosive coating according to claim 1, wherein the emulsifier is any one of sodium lauryl sulfate or sodium dodecylbenzenesulfonate. Kind.
- 根据权利要求1所述的一种高附着力重防腐涂料用丙烯酸酯共聚乳液，其特征在于：所述的引发剂为过硫酸铵或者过硫酸钠中的任意一种。The acrylate copolymer emulsion for a high adhesion heavy-duty anticorrosive coating according to claim 1, wherein the initiator is any one of ammonium persulfate or sodium persulfate.
- 根据权利要求1所述的一种高附着力重防腐涂料用丙烯酸酯共聚乳液，其特征在于：所述的pH调节剂为氨水或者氢氧化钠。The acrylate copolymer emulsion for a high adhesion heavy-duty anticorrosive coating according to claim 1, wherein the pH adjuster is ammonia water or sodium hydroxide.
- 根据权利要求1所述的一种高附着力重防腐涂料用丙烯酸酯共聚乳液，其特征在于：所述的成膜助剂为乙二醇单丁醚。The acrylate copolymer emulsion for a high adhesion heavy-duty anticorrosive coating according to claim 1, wherein the film-forming auxiliary agent is ethylene glycol monobutyl ether.
- 根据权利要求1-5任一一项所述的一种高附着力重防腐涂料用丙烯酸酯共聚乳液的制备方法，其特征在于：包括如下步骤：The method for preparing an acrylate copolymer emulsion for a high adhesion heavy-duty anticorrosive coating according to any one of claims 1 to 5, which comprises the following steps:(1)反应釜投入100-120份去离子水和1-2份乳化剂，搅拌至溶解；(1) The reactor is charged with 100-120 parts of deionized water and 1-2 parts of emulsifier, and stirred until dissolved;(2)引发剂滴加罐投入全部引发剂和10-15份去离子水，搅拌至溶解，制得引发剂溶液；(2) Initiator dripping tank is charged with all initiator and 10-15 parts of deionized water, stirred until dissolved, to prepare an initiator solution;(3)预乳化滴加罐投入剩余乳化剂和去离子水，搅拌至溶解，将全部单体投入预乳化滴加罐，持续开启搅拌预乳化至少30min，制得预乳化液；(3) pre-emulsification dropping tank into the remaining emulsifier and deionized water, stirring until dissolved, all the monomers are put into the pre-emulsified dropping tank, and the stirring pre-emulsification is continued for at least 30 minutes to prepare a pre-emulsion;(4)用氮气充分置换反应釜中的空气，至少置换2次；(4) sufficiently replacing the air in the reaction vessel with nitrogen, at least 2 times;(5)反应釜搅拌开启，保持常压，升温至80-85℃，加入20％的预乳化液和30％的引发剂溶液，反应时间1h；(5) stirring the reactor, maintaining normal pressure, heating to 80-85 ° C, adding 20% pre-emulsion and 30% initiator solution, reaction time 1h;(4)保持温度不变，滴加剩余预乳化液和引发剂溶液，滴加时间为3h；(4) keep the temperature unchanged, add the remaining pre-emulsion and initiator solution, the dropping time is 3h;(5)保持温度不变，保温反应1h；(5) keep the temperature unchanged, the heat preservation reaction for 1h;(6)降温至常温，用PH调节剂调节PH至7-8，加入成膜助剂，用100目过滤网过滤即得高附着力重防腐涂料用丙烯酸酯共聚乳液。 (6) Cooling to normal temperature, adjusting the pH to 7-8 with a pH adjuster, adding a film-forming auxiliary agent, and filtering with a 100-mesh filter to obtain an acrylate copolymer emulsion for a high adhesion heavy-duty anti-corrosion coating.
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