Selection of raw materials for interior and exterior latex paint_News information - 路赢化工(上海)有限公司
  • News information
  • Home
  • About
  • Product
  • News
  • Job
  • Contact
  • EN | 中文

    Selection of raw materials for interior and exterior latex paint

    Publication time:2018.08.17 10:30

    Times of browsing:

    Selection of raw materials for interior and exterior latex paint

     

    Yang wenyuan (taizhou silian chemical co., LTD., 225312)

     

    Abstract: the selection of raw materials for interior and exterior latex paint is discussed in order to produce high cost effective latex paint.

     

    Keywords: interior wall latex paint; Exterior wall latex paint; The raw materials

     

    Article no. : 1009-1696 (2012) 04-0044-03

     

    Practical technology

     

    0 the introduction

     

    In the past ten years, it should be said that China's economy has been developing rapidly

     

    Ten years, of course, is the architectural paint rapid development stage. According to the

     

    Statistics show that the annual output of China's construction coating was 3,518,000 tons in 2010

     

    Annual production was six times in 2001. Average annual paint usage per person is a measure

     

    The bellwether of national economy and people's living standard. With developed countries

     

    Than, the use amount of building coating per capita still is very low in our country. Statistically, I

     

    The per capita construction paint consumption in China is 2.6kg /a, and the per capita construction paint in cities and towns

     

    The material usage amount is 5.5 kg/a, while that of building coating per capita in developed countries such as Europe and America

     

    Material usage: over 25 kg/a. With China's future urbanization process

     

    The acceleration of urban population growth, coupled with urban and rural for housing

     

    Demand improvement, decoration demand will further rise in the foreseeable

     

    In the future, the demand for interior and exterior wall coatings will still be on the rise.

     

    There is a lot of room for improvement of architectural paint usage in China.

     

    As the demand for interior and exterior emulsioni paint continues to rise in recent years

     

    A large number of medium - sized paint production enterprises. Although the exterior wall latex

     

    Paint production technology gradually mature, but with the scale of large enterprises

     

    Production, small businesses are increasingly struggling, many even

     

    Without their own professional technical staff, the paint product formula is either one

     

    Some high quality raw materials piled up, or some inferior raw materials pool

     

    Set, coating performance stability and overall profits are also discounted.

     

    This paper attempts to combine the author's experience in the process of the shallow

     

    The formulation, raw material selection and production process control of exterior and interior latex paint are discussed

     

    Uniform elements.

     

    Basic formula of inner and outer wall emulsion paint

     

    With GB/T 9756-2009 "synthetic resin emulsion interior wall coating" and

     

    GB/T 9755-2001 "synthetic resin emulsion exterior wall paint" as an example

     

    Formula of internal and external emulsioni paint (see table 1). Additional, inside wall emulsioni paint return

     

    Mandatory standard GB 18582-2008 must be met.

     

    Table 1. Basic formula of exterior and interior latex paint

     

    Table 1 The formulation of interior/exterior latex paint

     

    Interior wall emulsion paint base formula (white) exterior wall emulsion paint base formula (white)

     

    Serial number material name quantity /‰

     

    1 water 250 1 water 120

     

    2 wetting agent PE100 1 2 wetting agent PE100 1

     

    3 dispersant SN5040 6 3 dispersant SN5040 6

     

    4 defoamer NXZ 1 4 defoamer NXZ 1

     

    5 propylene glycol 10 5 propylene glycol 10

     

    6 preservative LXE 2 6 preservative LXE 1.5

     

    7 anatase titanium 60 7 rutile titanium 120~150

     

    84,000 megasolinite 80~100 8 heavy calcium 150~250

     

    9 800 mesh heavy calcium 150~250 9 barium sulfate 50

     

    10 barium sulfate 60 10 wollastonite 40

     

    11 talc powder 40 11 styrene emulsion 240~260

     

    12 styrene-acrylic emulsion 120 12 film forming assistant

     

    TEXANOL

     

    5 to 7

     

    13 film forming assistant

     

    TEXANOL

     

    5~7 13 defoaming agent NXZ 1.5~2

     

    14 defoaming agent NXZ 1.5~2 14 rheology auxiliaries appropriate

     

    15 suitable amount of the rheological agent 15 suitable amount of cellulose thickening agent

     

    16 cellulose thickener appropriate amount of 16 alkali swelling thickener appropriate

     

    17 moderate amount of alkali swelling thickener 17 moderate amount of water

     

    18 a moderate amount of water

     

    PH regulator micro amount

     

    No.4 45

     

    2. Selection of raw materials for emulsion paint

     

    2.1 the emulsion

     

    Emulsion is the most important film forming material in the inner and outer wall emulsion paint.

     

    For internal wall emulsion paint, generally use vinegar emulsion, vinegar tertiary emulsion, benzene

     

    Acrylic emulsion; For exterior wall latex paint, pure propyl emulsion, silicon-propyl emulsion,

     

    Styrene-acrylic emulsion. At present in China, most of the interior and exterior latex paint is benzene

     

    Acrylic emulsion, because of its cost - effective acceptance. To reach the inner wall latex

     

    Performance requirements of lacquer GB/T 9756 -- 2009, in basic formula design,

     

    The most important is the number of times of washing, the emulsion in the formula

     

    Generally 10.5%~12.5%.

     

    2.2 selection of preservatives and fungicides

     

    Whether preservative or fungicide, the variety on the market

     

    Are very complex, the principles of selection are generally efficient, low toxicity, compatibility,

     

    Stable, durable and cost-effective. Use of formaldehyde is becoming increasingly popular

     

    Type of preservative, through its slow release, to achieve a certain degree of germicidal efficacy,

     

    It not only has the advantages of formaldehyde, but also avoids the disadvantages of formaldehyde. general

     

    In the formula, the amount of preservative is 0.1%~0.3%, the use of anti - mildew agent

     

    Content is 0.3% ~ 0.6%. For products that require special mildew resistance, choose

     

    It is better to use two or more fungicides. Fungicides are mainly used

     

    Prevent the wet areas where rain is abundant from producing mildew on the walls and dry in the north

     

    Area production USES emulsioni paint, most enterprises do not add anti - mildew agent.

     

    2.3 selection of wetting dispersant

     

    The wetting, dispersing, and stabilizing of pigments is often closely linked,

     

    Wetting is the process of particle replacement on pigment surface. Disperse is the pigment in

     

    The process of separation under the action of external forces; Stability is the final dispersal

     

    The pigment granules no longer condense twice. The common wetting agent for latex paint is

     

    Cognis PE100; The commonly used dispersants are polyacrylate and polyacrylate

     

    Polyphosphate. In practice, 0.2% polyphosphate and

     

    A mixture of 0.2% to 0.4% polyacrylate. Storage stability of coatings,

     

    Washing resistance is a key index to evaluate dispersant.

     

    2.4 selection of antifoaming agent

     

    Antifoaming agents can be divided into antifoaming agents and defoaming agents. Antifoaming agent has been on

     

    The foaming agent is on the coating surface

     

    The surface plays a role in destroying the bubbles that have formed. In the production of latex paint

     

    In control, antifoaming agents are usually added twice, at the pulping stage and in paint making

     

    Add 1/2 to each stage. Or 2/3 in the pulping stage and 2/3 in the paint stage

     

    In the third. At the stage of pulping, it is best to add a defoaming agent with strong anti-foam effect.

     

    In the paint stage it is best to add the foam breaking ability strong anti - foam agent.

     

    2.5 selection of film forming auxiliaries

     

    The emulsion itself is thermoplastic, so in order to guarantee the film performance,

     

    You don't want it to be too soft, and you want it to be as hot as possible.

     

    Corresponding production of emulsion paint the lowest film temperature is higher, so low temperature

     

    Construction and film formation become a problem, which is through the addition of film auxiliary

     

    To balance.

     

    The amount of film forming AIDS generally depends on the amount of emulsion, but

     

    The vitrification temperature of emulsion also affects the amount of film additives

     

    Big. In addition, such as propylene glycol, ethylene glycol such as antifreeze agent is also certain

     

    And the amount of them to the amount of the film forming AIDS

     

    It has an impact. Furthermore, with the increase of PVC (pigment volume concentration),

     

    That is, the amount of emulsion reduced, the film is more difficult, because with the face filling

     

    The adhesion of the material to the film forming agent greatly reduces the efficiency of the film forming agent.

     

    Most of the production of film additives in the paint phase of emulsion Tim

     

    After adding, such production if the operation is not good, film auxiliary

     

    So that the emulsion quickly polymerized into small particles and coarse, so must be stirred at low speed

     

    Mix slowly in the mix, so that the film agent to play the largest role. There are also

     

    It is added before the painting stage, although it is safer to do so

     

    Hydrophobic film forming AIDS will be wetted by emulsifying, and face filler in advance

     

    Adhesion, the actual effectiveness of film - forming AIDS will be greatly reduced.

     

    The dosage of film forming assistant should be based on the emulsion, adding process, formula,

     

    The different of season, area will be treated flexibly, its regular dosage is emulsion use

     

    0.05 times the amount.

     

    2.6 selection of thickeners

     

    Latex paint is water as the dispersing medium of the paint, and water viscosity

     

    Very low, can not meet the construction requirements, need thickening agent to adjust the flow

     

    Degeneration. Commonly used thickeners are cellulose, non - associative alkali swelling

     

    Type ii and associative alkali swelling type thickeners, their properties are shown in table 2.

     

    Table 2 properties of various thickeners

     

    Table 2 The characteristics of various thickeners

     

    Comparison of cellulose non-associative alkali swelling type association alkali swelling type

     

    The thickening efficiency is higher and higher

     

    PH sensitivity is generally very high

     

    Poor splash resistance is better

     

    Poor leveling is generally good

     

    Flow resistance is better, better and better

     

    The optical retention is generally good

     

    Better water resistance, better and better

     

    Good alkali resistance is general

     

    The prices are higher, moderate and cheaper

     

    Yang wenyuan: the choice of raw material of latex paint for inner and outer walls

     

    Shanghai paint volume 50

     

    It can be seen from table 2 that various thickeners have different advantages and disadvantages in milk

     

    In the paint system, if only one thickening agent is used, the storage stability,

     

    Construction effect and other aspects are difficult to achieve the expected performance, most of them are adopted

     

    Two or more thickeners are used to achieve the desired effect.

     

    2.7 choice of fillers

     

    Take white latex paint as an example, rutile titanium dioxide is the best

     

    White pigment. In our country most manufacturer, interior wall emulsioni paint makes more

     

    Use anatase titanium; use rutile titanium; In the developed countries

     

    The interior and exterior walls are basically rutile - type titanium white.

     

    Commonly used fillers are calcium carbonate, talc powder, sericite powder, gao ling

     

    Soil, silica fume, lithopone, quartz powder, ultrafine aluminum silicate, sulfuric acid

     

    Barium, etc.

     

    Both heavy and light calcium belong to calcium carbonate, of which heavy calcium is the natural mineral

     

    Stone is crushed and light calcium is a synthetic product. Among the many fillers, weight

     

    Calcium should be said is in emulsioni paint usage amount is the biggest, most stable, cheapest

     

    Packing; Although light calcium also has a little dry covering power, suspension is also good,

     

    But easy to start white frost, stability is poorer.

     

    Many interior wall latex paint formulations also use a little talcum powder, though

     

    It is easy to powder, but can improve the construction and leveling of emulsion paint.

     

    Sericite powder belongs to layered silicate, is scale crystal, acid resistant

     

    Good alkali resistance and chemical stability. It can be used in exterior and interior latex paint

     

    Appropriate use, on the one hand can greatly improve the weather resistance of paint film, prevent

     

    Water vapor penetration, on the other hand to prevent powder and paint cracking.

     

    Another important filler is kaolin, which is easily dispersed in water, white

     

    High degree, strong dry covering, thixotropic, paint stability

     

    And in good shape. Through experimental study, we found that the ultrafine 4 000 order

     

    Kaolin and titanium dioxide can be used to improve the covering power of the coating

     

    Comprehensive performance. In white latex paint, silica fume has a bright color

     

    Adjust, can enhance the hardness of paint film, but also improve the durability and resistance of the film

     

    Grinding.

     

    According to the characteristics of the different fillers described above, the inner wall latex paint in general

     

    Products with high whiteness such as heavy calcium, light calcium, talc powder and kaolinite;

     

    Sericite, barium sulfate, wollastonite powder,

     

    Calcined kaolin, etc. Should choose flexibly according to price, demand.

     

    3 conclusion

     

    Although at present the production technology of emulsioni paint is increasingly mature with the technology

     

    The increasingly progressive innovation of art is still developing, while our country until the 20th century

     

    In the early 1990s, with the entry of multinational companies into China brought new

     

    Material, new technology, just begin rapid development. Improve cost performance and increase

     

    Function, low cost, low VOC (volatile organic compounds), low gas

     

    Taste, environment friendly type emulsioni paint will become the mainstream.

     

    To obtain high cost performance emulsion paint required to fine the relevant raw materials

     

    For in-depth comparative research and selection, not raw material piling, no

     

    To obtain good market returns, we must optimize the formulation.

     

    The Selection of Raw Materials for Interior/Exterior Latex Paint

     

    Yang Wenyuan (Taizhou Quad Chemical Co., Ltd., Jiangsu Taizhou, 225312, China)

     

    Abstract: The selection of raw materials for interior/exterior latex paint were brief discussed in order to prepare The

     

    Latex paint with high price performance ratio.

     

    Key Words: interior latex paint; Exterior latex paint; Raw material

     

    Akzo Nobel powder paint released 2012 Interpon F furniture color trend

     

    Recently, akzo Nobel powder paint released the latest Interpon F 2012 color trend designed specifically for the furniture industry.

     

    The latest Interpon F color trend is at the forefront of today's color trends. This series product has 15 kinds of indoor furniture color and 15 kinds of outdoor furniture color

     

    Colors are available.

     

    The latest popular collection is refreshingly based on akzo Nobel's "color trend" series, showing the latest in the furniture market

     

    Color and surface effect trends. Designers can not only have excellent performance and excellent protection of Interpon F powder coating into their own products, at the same time

     

    It also ensures that its design is in line with the latest color trends.

     

    Based on the color trend, akzo Nobel also released the Interpon F color and gloss standard color card, which will help designers better understand

     

    Interpon F's choice of different colors and sheen.

     

    Interpon F furniture powder coating follows the fashion trend, durable and provides first-class protective effect. It can fully meet the durability of the furniture industry and beauty