阅读说明：本技术 在木器上快速干燥的水性醛酮树脂改性丙烯酸乳液及制备方法 (Water-based aldehyde ketone resin modified acrylic emulsion capable of being quickly dried on woodware and preparation method thereof ) 是由 易承志 程蕾 于 2020-07-20 设计创作，主要内容包括：本发明公开一种在木器上快速干燥的水性醛酮树脂改性丙烯酸乳液及制备方法,其原料组成包括丙烯酸单体、醛酮树脂、引发剂、复合乳化剂、pH值调节剂和去离子水。采用醛酮树脂改性丙烯酸乳液则可以在很大程度上改善丙烯酸乳液的干燥性能,使得丙烯酸乳液在儿童家具、玩具等行业应用更加顺畅,干燥时间从常规的两天大大缩减到5个小时,大大降低木材涂装厂家的半成品占地面积、大大降低了生产成本。(The invention discloses a waterborne aldehyde ketone resin modified acrylic emulsion capable of being quickly dried on woodware and a preparation method thereof. The acrylic emulsion modified by the aldehyde ketone resin can improve the drying performance of the acrylic emulsion to a great extent, so that the acrylic emulsion is more smoothly applied to industries such as children furniture, toys and the like, the drying time is greatly reduced from two days to 5 hours conventionally, the occupied area of semi-finished products of wood coating manufacturers is greatly reduced, and the production cost is greatly reduced.)

1. The waterborne aldehyde ketone resin modified acrylic emulsion capable of being quickly dried on woodware is characterized by comprising the following components in percentage by weight:

32-54% of acrylic monomer;

1-5% of aldehyde ketone resin;

0.2 to 0.6 percent of initiator;

1% of composite emulsifier;

0.1 to 0.2 percent of pH regulator;

the balance of deionized water.

2. The waterborne aldehyde ketone resin modified acrylic emulsion for wood ware capable of being dried rapidly according to claim 1, wherein the acrylic monomer is a mixture of acrylic acid, methyl methacrylate, butyl acrylate, styrene and isooctyl acrylate.

3. The waterborne aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on woodware as claimed in claim 2, wherein the acrylic monomer comprises the following components in percentage by mass:

1-3% of acrylic acid, 16-25% of methyl methacrylate, 7-10% of butyl acrylate, 7-12% of styrene and 1-4% of hydroxyethyl acrylate.

4. The waterborne aldehyde ketone resin modified acrylic emulsion for wood ware capable of being dried rapidly according to claim 1, wherein the initiator is a waterborne peroxide initiator.

5. The waterborne aldehyde ketone resin modified acrylic emulsion for the rapid drying of woodware as claimed in claim 1, wherein the compound emulsifier is a mixture of sodium dodecyl sulfate, ADEKA REASOAP SR-10 or ADEKA REASOAP ER-30, fatty alcohol polyoxyethylene ether.

6. The waterborne aldehyde ketone resin modified acrylic emulsion for quick drying of woodware as claimed in claim 5, wherein the mass ratio of sodium dodecyl sulfate, ADEKA REASOAP SR-10 or ADEKA REASOAP ER-30, and fatty alcohol-polyoxyethylene ether is 1: 1: 1.

7. the waterborne aldehyde ketone resin modified acrylic emulsion for rapid drying on woodware as claimed in claim 1, wherein the pH regulator is sodium bicarbonate for controlling the pH value of the reaction solution between 5.5 and 5.6.

8. A preparation method of the water-based aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on the woodware according to any one of claims 1 to 7, is characterized by comprising the following steps:

step S1: weighing a styrene monomer, an acrylate monomer, an acrylic acid monomer and an acrylate functional monomer according to a formula design, and mixing to obtain an acrylic acid monomer; taking part of acrylic acid monomer as seed monomer, dissolving aldehyde ketone resin by using the seed monomer, and adding part of composite emulsifier for pre-emulsification to prepare seed pre-emulsion;

step S2: adding a composite emulsifier, sodium bicarbonate and part of deionized water into a four-neck flask provided with a thermometer, a condenser pipe, a stirring paddle and a constant-pressure dropping funnel, adding part of initiator when the temperature reaches 80 ℃, stabilizing for 5 +/-1 min, dripping the seed pre-emulsion within 20 +/-5 min, and stabilizing for 30 +/-5 min;

step S3: and (3) dropwise adding the rest of initiator dissolved by the rest of deionized water in 3-4h, heating to 85-89 ℃, preserving heat for 1h, cooling to below 50 ℃, neutralizing, and discharging.

9. The method for preparing the waterborne aldehyde ketone resin modified acrylic emulsion for the rapid drying of woodware as claimed in claim 8, wherein the pH value of the reaction solution in the reaction process is adjusted to 5.5-6.5 by sodium bicarbonate.

10. The method for preparing the waterborne aldehyde ketone resin modified acrylic emulsion for the woodware rapid drying according to claim 8, wherein part of acrylic monomers accounts for 10-20% of the total amount of the acrylic monomers; part of the initiator accounts for 1/3-1/2 of the total weight of the initiator; part of the compound emulsifier accounts for 1/3-1/2 of the total weight of the compound emulsifier; part of deionized water accounts for 10-20% of the total amount of the deionized water.

Technical Field

The invention relates to the field of waterborne wood lacquer, and mainly relates to a waterborne aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on wood and a preparation method thereof.

Background

The acrylic emulsion is generally prepared by copolymerizing acrylic acid and acrylic esters or methacrylic ester and other dilute base monomers and then adding auxiliary materials such as a composite emulsifier, and the acrylic emulsion coating has excellent weather resistance, pollution resistance and solvent resistance and is widely applied. In the water-based wood lacquer industry, most of the industries such as children toys, beds, tables and chairs begin to use the water-based wood lacquer, and most of the industries mainly use acrylic emulsion. However, acrylic emulsions have certain disadvantages in certain applications, such as slow drying, poor mechanical strength and poor thermal stability, which limit their use. The existing waterborne acrylic emulsion for woodware has the drying time of two days, so that the semi-finished product of a coating manufacturer has large floor area, low production efficiency and high production cost.

Accordingly, the prior art is yet to be improved and developed.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a waterborne aldehyde ketone resin modified acrylic emulsion capable of being quickly dried on woodware and a preparation method thereof, and aims to solve the problem that the existing acrylic emulsion is slow to dry.

The technical scheme of the invention is as follows:

the waterborne aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on woodware comprises the following components in percentage by weight:

32-54% of acrylic monomer;

1-5% of aldehyde ketone resin;

0.2 to 0.6 percent of initiator;

1-3% of a compound emulsifier;

0.1 to 0.2 percent of pH regulator;

the balance of deionized water.

The waterborne aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on the woodware is characterized in that the acrylic monomer is a mixture of acrylic acid, methyl methacrylate, butyl acrylate, styrene and isooctyl acrylate.

The waterborne aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on the woodware comprises the following components in percentage by mass:

1-3% of acrylic acid, 16-25% of methyl methacrylate, 7-10% of butyl acrylate, 7-12% of styrene and 1-4% of hydroxyethyl acrylate.

The waterborne aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on the woodware is characterized in that the initiator is a waterborne peroxide initiator.

The waterborne aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on the woodware is characterized in that the composite emulsifier is a mixture of sodium dodecyl sulfate, ADEKA REASOAP SR-10 or ADEKA REASOAP ER-30 and fatty alcohol-polyoxyethylene ether.

The waterborne aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on the woodware is characterized in that the mass ratio of lauryl sodium sulfate, ADEKA REASOAP SR-10 or ADEKA REASOAP ER-30 to fatty alcohol-polyoxyethylene ether is 1: 1: 1.

the waterborne aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on the woodware is characterized in that the pH regulator is sodium bicarbonate and is used for controlling the pH value of the reaction liquid to be 5.5-5.6.

The preparation method of the waterborne aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on the woodware comprises the following steps:

step S1: weighing a styrene monomer, an acrylate monomer, an acrylic acid monomer and an acrylate functional monomer according to a formula design, and mixing to obtain an acrylic acid monomer; taking part of acrylic acid monomer as seed monomer, dissolving aldehyde ketone resin by using the seed monomer, and adding part of composite emulsifier for pre-emulsification to prepare seed pre-emulsion;

step S2: adding a composite emulsifier, sodium bicarbonate and part of deionized water into a four-neck flask provided with a thermometer, a condenser pipe, a stirring paddle and a constant-pressure dropping funnel, adding part of initiator when the temperature reaches 80 ℃, stabilizing for 5 +/-1 min, dripping the seed pre-emulsion within 20 +/-5 min, and stabilizing for 30 +/-5 min;

step S3: and (3) dropwise adding the rest of initiator dissolved by the rest of deionized water in 3-4h, heating to 85-89 ℃, preserving heat for 1h, cooling to below 50 ℃, neutralizing, and discharging.

The preparation method of the waterborne aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on the woodware comprises the step of adjusting the pH value of a reaction liquid in the reaction process to be 5.5-6.5 by using sodium bicarbonate.

The preparation method of the waterborne aldehyde ketone resin modified acrylic emulsion capable of being rapidly dried on the woodware comprises the following steps of (1) enabling part of acrylic monomers to account for 10-20% of the total amount of the acrylic monomers; part of the initiator accounts for 1/3-1/2 of the total weight of the initiator; part of the compound emulsifier accounts for 1/3-1/2 of the total weight of the compound emulsifier; part of deionized water accounts for 10-20% of the total amount of the deionized water.

Has the advantages that: the acrylic emulsion modified by the aldehyde ketone resin can improve the drying performance of the acrylic emulsion to a great extent, so that the acrylic emulsion is more smoothly applied to industries such as children furniture, toys and the like, the drying time is greatly reduced from two days to 5 hours conventionally, the occupied area of semi-finished products of wood coating manufacturers is greatly reduced, and the production cost is greatly reduced.

Detailed Description

The invention provides a waterborne aldehyde ketone resin modified acrylic emulsion capable of being quickly dried on woodware and a preparation method thereof, and the invention is further detailed below in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides a waterborne aldehyde ketone resin modified acrylic emulsion capable of being quickly dried on woodware. Specifically, the paint comprises the following components in percentage by weight:

32-54% of acrylic monomer;

1-5% of aldehyde ketone resin;

0.2 to 0.6 percent of initiator;

1% of composite emulsifier;

0.1 to 0.2 percent of pH regulator;

the balance of deionized water.

Wherein the acrylic monomer is a mixture of acrylic acid, methyl methacrylate, butyl acrylate, styrene and isooctyl acrylate. The invention also provides the following acrylic monomers in percentage by mass:

1-3% of acrylic acid, 16-25% of methyl methacrylate, 7-10% of butyl acrylate, 7-12% of styrene and 1-4% of hydroxyethyl acrylate.

The acrylic monomer mixture is modified by the aldehyde ketone resin, so that the acrylic emulsion has the characteristics of quick drying, good hardness and the like, and the drying performance of the acrylic emulsion is improved to a great extent.

The initiator is an aqueous peroxide initiator, such as ammonium persulfate. The pH adjuster may be sodium bicarbonate.

In the present invention, the amount of the complex emulsifier is limited to 1% because the emulsion stability is better with 1% of the amount of the complex emulsifier. The invention also provides a preferable compound emulsifier combination, and the compound emulsifier can be a mixture of Sodium Dodecyl Sulfate (SDS), ADEKA REASOAP SR-10 or ADEKA REASOAP ER-30 and fatty alcohol-polyoxyethylene ether. The combination of these three complex emulsifiers is used because the emulsions thus obtained are mechanically and ionically stable. The invention also provides the optimal dosage proportion range of the three complex emulsifiers: sodium Dodecyl Sulfate (SDS), ADEKAREASOAP SR-10 or ADEKA REASOAP ER-30, the mass ratio of fatty alcohol-polyoxyethylene ether is 1: 1: 1.

the pH regulator can be sodium bicarbonate and is used for controlling the pH value of the reaction liquid to be 5.5-5.6.

The invention also provides a preparation method of the waterborne aldehyde ketone resin modified acrylic emulsion capable of being quickly dried on woodware, which comprises the following steps:

step S1: weighing acrylic acid, methyl methacrylate, butyl acrylate, styrene and hydroxyethyl acrylate according to the formula design, and mixing to obtain an acrylic monomer; taking part of acrylic acid monomer as seed monomer, dissolving aldehyde ketone resin by using the seed monomer, and adding part of composite emulsifier for pre-emulsification to prepare seed pre-emulsion;

step S2: adding the rest of the composite emulsifier, sodium bicarbonate and part of deionized water into a four-neck flask provided with a thermometer, a condenser pipe, a stirring paddle and a constant-pressure dropping funnel, adding part of the initiator when the temperature reaches 80 ℃, stabilizing for 5 +/-1 min, dripping the seed pre-emulsion within 20 +/-5 min, and stabilizing for 30 +/-5 min;

step S3: and (3) dropwise adding the rest of initiator dissolved by the rest of deionized water into the rest of acrylic monomer and the rest of initiator within 3-4h, heating to 85-89 ℃, preserving heat for 1h, cooling to below 50 ℃, neutralizing, and discharging.

Wherein, the pH value of the reaction liquid in the reaction process is adjusted to 5.5-6.5 by sodium bicarbonate.

Wherein in the step S1, part of the acrylic acid monomer accounts for 10-20% of the total amount of the acrylic acid monomer;

part of the initiator accounts for 1/3-1/2 of the total weight of the initiator; part of the compound emulsifier accounts for 1/3-1/2 of the total weight of the compound emulsifier; part of deionized water accounts for 10-20% of the total amount of the deionized water.

The present invention is further illustrated by the following specific examples.