Applications and Features of adhesion promoter

Adhesion promoters belong to chemical substances, when it is in production, there is a lot of stress, which is a lot of use because of the need to meet the requirement of today. Now i tell you this article is about the application of an adhesion promoter and the characteristics, the following will look together specific introduction.

Due to the different chemical nature of these compounds, therefore the paint formulator to use them when they have to be separately evaluated. Contains an epoxy functional group or a methoxy group aids in improving the various aspects of the coating system on the adhesion of glass, aluminum and steel plate is effective. Contain adjuvants methacrylate functional group or a methoxy group can improve the adhesion of the free radical curable resin an inorganic substrate. Epoxy functional group-containing silicone compound to improve the coating systems of the different adhesive strength of the inorganic substrate and a coating of water resistance. Powders containing epoxy functionality transparent silicone rubber particles can improve the wear resistance of the coating, and the coating surface as smooth as silk, has a matting effect.

Can significantly improve the binding force of the resin with various substrates; widely used in a variety of coating systems and formulation system. High-strength adhesion and bonding strength glue focus, this performance of traditional products on the market can not match. Can greatly increase the adhesion between the layers of paint and primer coat between the coating significantly improved resistance to moisture, resistance to salt spray performance and heat resistance. A very small amount, you can get high-strength adhesion and bonding strength. Has excellent storage stability and long-term nature in the paint and coating systems.

All the Description above is the application of an adhesion promoter, i believe after our introduction, may have a certain understanding in this area also, its role is very powerful for improving the adhesion between the layers, improving the wet performance has a significant effect.

Related knowledge of vinyltrimethoxysilane

Vinyl silane may  refer generically to any vinyl-substituted silane, such as vinyltrimethoxysilane or vinyltriethoxysilane. In this context it can refer to a monomer used for some copolymer plastics such as ethylene-vinyltrimethoxysilane and ethylene-vinyl acetate-vinyltrimethoxysilane. Today，we will tell you something about vinyltrimethoxysilane are as follows:

Performance and characteristics

Colorless transparent liquid having an ester flavor, the slow hydrolysis under the influence of water to generate the corresponding silanol. Soluble in methanol, ethanol, isopropanol, toluene, acetone and other organic solvents. Vinyltrimethoxysilane is a generic type organic silane coupling agent, mainly used to make polyethylene crosslinking agent; glass fiber surface treatment agent; synthesis of specialty coatings; surface moisture treatment of electronic components; inorganic siliceous filler surface treatment. 

Security Terms 

1、In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

2、Wear suitable protective clothing.

Risk Phrases

1、Flammable

2、Irritating to eyes and respiratory system.

(source:http://www.ac-chem.net/news/related-knowledge-of-vinyltrimethoxysilane-a303.html)

How to apply epoxy resins on floors

Epoxy resin products come in a variety of colors and textures to create a decorative floor coating over a concrete subfloor. The surface is durable and easy to clean, which makes resin floor covering ideal for a garage and other high-traffic locations. Then how to apply epoxy resins on floors will make a introduction as below.

Sweep and mop the floor using a stiff-bristle broom and a rope mop with pH-neutral floor cleaner to remove any dirt present on the floor surface. Use a degreaser and a scrub brush to remove any oil-based staining on the floor as well. Dirt and oil both will interfere with the epoxy resin, causing adhesion problems as well as discoloration. Allow the floor 24 hours drying time before adding the resin.

Mix the resin as instructed by the manufacturer in a large bucket. When using an aggregate, first mix the two resin components together in the bucket with an electric drill containing a paddle attachment, then mix the additive into the epoxy until you have a mix that's spreadable by a steel trowel. You want just enough epoxy with the aggregate to bind the chosen addition aggregate material together.

Pour the mixture onto the floor beginning in the corner furthest from the room's entrance. Cover the floor in small areas at a time, about 5 square feet, to avoid having to make large batches of resin at a time that may cure in the bucket before you can apply it to the floor.

Spread the epoxy over the small floor segment. Use a paint roller for an epoxy mixture without aggregate added. Roll the epoxy in lines across the floor with the roller, overlapping each line until you cover the section. Use a steel trowel instead of a paint roller if working with an epoxy containing an aggregate in the mix. Spread the epoxy in a layer across the floor in a layer of about 1/4 inch thick, leveling it out as you go along with the flat of the trowel.

Apply the next section of flooring by spreading the covering from the still wet surface of the first section. Always spread from a wet area of epoxy to a dry area in order to avoid leaving lines showing the separation of the smaller sections. Work your way towards the opening in the room section by section to cover the entire floor with the epoxy.

Allow the epoxy to dry for the length of time that the manufacturer recommends before attempting to step onto the floor.

(source:http://www.ac-chem.net/news/how-to-apply-epoxy-resins-on-floors-90c6.html)

Epoxy Chemistry

Epoxy resins are low molecular weight pre-polymers or higher molecular weight polymers which normally contain at least two epoxide groups. The epoxide group is also sometimes referred to as a glycidyl or oxirane group.

A wide range of epoxy resins are produced industrially. The raw materials for epoxy resin production are today largely petroleum derived, although some plant derived sources are now becoming commercially available (e.g. plant derived glycerol used to make epichlorohydrin).

Epoxy resins are polymeric or semi-polymeric materials, and as such rarely exist as pure substances, since variable chain length results from the polymerisation reaction used to produce them. High purity grades can be produced for certain applications, e.g. using a distillation purification process. One disadvantage of high purity liquid grades is their tendency to form crystalline solids due to their highly regular structure, which require melting to enable processing.

An important characteristic of epoxy resins is the epoxide content. This is commonly expressed as the epoxide number, which is the number of epoxide equivalents in 1 kg of resin (Eq./kg), or as the equivalent weight, which is the weight in grams of resin containing 1 mole equivalent of epoxide (g/mol). One measure may be simply converted to another:

Equivalent weight (g/mol) = 1000 / epoxide number (Eq./kg)

The equivalent weight or epoxide number is used to calculate the amount of co-reactant (hardener) required when curing epoxy resins. Epoxies are typically cured with stoichiometric or near-stoichiometric quantities of curative to achieve the best physical properties.

As with other classes of thermosetting polymer materials, blending different grades of epoxy resin, as well as use of additives, plasticizers or fillers is common to achieve the desired processing and/or final properties, or to reduce cost. Use of blending, additives, and fillers is often referred to as formulating.

(source:http://www.ac-chem.net/news/epoxy-chemistry-9a23.html)

Silanes as adhesion promoters

Due to silane special structure and compose, has been successfully used to adhesion promoters, surface treatment agent for decades. Now silane have become the indispensable constituent of coatings and ink system .

When the coating contains a small amount of a silane coupling solvent, after which the coating of silane with the substrate migrate into the interface of the coating, the water reacts with the inorganic surface, the hydrolysis of a silanol group, and then form a hydrogen bond with the substrate surface hydroxyl groups or condensed -Si-M (M is an inorganic surface), while the silanol group of the silane molecules condensed with each other again, the membrane covering the mesh structure is formed on the substrate surface oligomerization. Even under flooding conditions, the silane coupling agent-modified substrate surface coatings of various inorganic good adhesions. Paint in the boundary layer between the base and the substrate, silane-based interaction with the paint, and varnish formation of silane-based mutual penetration of the network structure, and enhance the stability of their cohesion and water erosion, and stress in order by modulus the low modulus of the substrate to transfer the paint base, in order to significantly improve the adhesion to the substrate.

Product  Recommendation:

product	Resin Type	Typical concentrations	Function / Advantage
AC-D210	Acrylic, alkyd resin, epoxy resin,  polyester, polyurethane, vinyl	Primer: diluted with isopropyl alcohol into 10% solids; additives: 0.5-3.0%	Adhesion to a variety of coating systems for glass, aluminum and steel surfaces to enhance
AC-410	Acrylic, alkyd resin, epoxy resin, polyester, polyurethane, vinyl, unsaturated polyester resins	Primer: in acidic (PH-4.0)  water  was diluted to 0.1% -0.5%; additives: 0.5-3.0%	To enhance the adhesion of  the radical cross-linked resin for inorganic substrates
AC-310	Acrylic, alkyd resin, epoxy resin, nitrocellulose,  phenolic, polyester, polyurethane, vinyl	Primer:  with isopropanol diluted to 10% solids; additives: 0.5-3.0%	Adhesion to a variety of coating systems for glass, aluminum and steel surfaces to enhance
AC-510/AC-520/AC-521	Acrylic, alkyd resin, epoxy resin, polyester, polyurethane, vinyl		Used for acrylic paint and other  various kinds coatings, and surface  treatment of the pigment

(source:http://www.ac-chem.net/news/silanes-as-adhesion-promoters-bcca.html)

Silane on the application of coatings and inks

Due to silane special structure and compose, has been successfully used to adhesion promoters, surface treatment agent for decades. Now silane have become the indispensable constituent of coatings and ink system . Whether it is used as an additive or coating primer will endow excellent performance of coatings and printing ink.

Silane is a molecular structure which has a bifunctional group, represented by the formula is expressed as Y (CH2) nSiX3, wherein Y represents an alkyl group, a phenyl group and a vinyl group, an epoxy group, an amino group, a mercapto group and other organic functional groups, often with a coating  matrix resin organic functional groups chemically bonded; X represents a chloro group, a methoxy group, an ethoxy group, etc. These groups easily hydrolyzed to silanol groups with the inorganic materials (glass, silica, metal, clay, etc.)  the oxide on the surface or hydroxyl groups .The reaction to form a stable silicon-oxygen bond. Accordingly, by a silane coupling agent, can be set up between inorganic material and organic material interface "molecular bridge",the two properties completely different materials together  . Silanol functional groups of the organic functional group, and silane reactive groups can determine what role the silane in the coating system.

According to the different combination of materials, the role of the silane be summarized as follows:
Improve coating adhesion.
Improve durability of the coating.
To improve the weather resistance of the coating.
Improve the coating toughness.
Significantly reduce the viscosity of the dispersion of fillers and pigments to improve the dispersibility of the pigment

Then, what the role of silane in the primer? Covalent bond of silicon atoms have the organic matter and inorganic matter unique function ,silica internal born with stable structure, make it become an important part of high performance coating primer. In the primer using silane coupling agent can improve the sticky nature, to maintain its humidity, chemical resistance, UV resistance and enhanced; improved filler dispersion. Alkoxysilane is compatible with many organic resin. In fact, the silane is a strong polar solvent, polymerization of silane again affect the compatibility of the polymer and the final properties. In the organic matter and inorganic matter surfaces (for example, pigments, fillers, and glass, metal surfaces),  an inorganic of the alkoxy-functional groups covalently coupled to a large number of the organic group. Organic functional groups of silane just find the matching organic polymer will produce excellent effect.

(source:http://www.ac-chem.net/news/silane-on-the-application-of-coatings-and-inks-a09f.html)

Vinyltrimethoxysilane applications and precautions

Vinyltrimethoxysilane is one of the products of silane coupling agent,it has many applications and precautions.
Applications:
Vinyltrimethoxysilane is suitable for PE and copolymers of different density and plastic products of complicated profiles. It is suitable for use at high temperature. It provides the polymer with high resistance to decomposition at pressure, abrasion and impact as well as shape memory effect. To modify PE and other polymers, it can be grafted to the backbone chain of polymer so the side chain of polymer is provided with ester group as the active point for cross-linking in hot water. It can be used for the jacketing and insulation of wire and cables, tubing and other extruded or molded products.
Precautions on transportation and storage：
Avoid leakage,collapse, fall and damage during transportation. Combined shipment with oxidants, alkalis, alcohols and food additive chemical is strictly prohibited.Keep away from direct sunlight, rain and high temperature.

(source:http://www.ac-chem.net/news/vinyltrimethoxysilane-applications-and-precautions-9f57.html)

Application of silanes in dentistry

There are many applications of silanes,such as silane adhesion promoters,building protection,cables and pipes,fillers and pigments,dentistry and so on.Today,we will focus on explaining application of silanes in dentistry,we will tell you something about it as follows:
Ceramic restorations and repairs
Silane coupling agents are used in dental restoration, such as ceramic repairs of onlays, inlays, crowns and bridges. For most patients, repair is more economical and time-saving than the fabrication of new restorations, unless damage due to a fracture is beyond repair. The clinical procedure for repairing ceramic restoration usually involves the following steps: roughening the surface with diamond burs, sand-blasting the surface, acid etching, silanization and finally bonding to resin composite.
Glass fibre-reinforced composites
A relatively new group of dental biomaterials, the glass fibre-reinforced composites, is used in fixed partial dentures, removable prosthodontics, periodontal splints and retention splints. The adhesion between the glass fibre and resin composite is improved by adding a silane coupling agent. The silane forms siloxane linkages with the surface hydroxyl groups of glass fibre. The organo-functional groups of silane react with the functional group in the resin composite. Thus, the bonding strength is increased between resin composite and glass fibre.
Resin composite filling materials
Nowadays,dental resin composites are composed of a resin matrix that contains monomers and cross-linking monomers, as well as a free-radical initiator, an inhibitor, colouring pigments, filler materials such as barium glass, silica, apatite and a silane coupling agent. The latter enhances the bonding between the filler particles and the resin matrix. The filler particles added to the resin matrix also improve the physical and mechanical properties of the resin composite. Moreover, the addition of fillers reduces volume shrinkage after polymerisation, and improves the aesthetic appearance and radiopacity.
Titanium, noble metal and base metal alloys
Titanium, noble metals and cobalt–chromium (base metal) alloys are commonly used for removable partial and complete dentures with a metal frame incorporated and metal–resin cement restorations. For these metal and metal alloys, surface conditioning by sand-blasting using silica-coated alumina particles produces a silica-coated layer on the surface. Application of a silane coupling agent to the silica-coated surfaces forms a durable siloxane linkage. This is followed by cementation.

(source:http://www.ac-chem.net/news/application-of-silanes-in-dentistry-bfb9.html)

How much do you know about our company?

How much do you know about our company?Today I will introduce it to your,let your know us better!
Silane adhesion promoters,silane crosslinkers,silane moisture scavengers,silane coupling agents and silane resin modifiers are our proud of products of Nanjing Aocheng Chemical Co., Ltd.,which is a member of Aocheng Group. Nanjing Aocheng Chemical Co., Ltd. is a leading and reliable supplier of organo-functional silanes and some inorgano-functional silanes in China.
 Organo-functional silanes or organosilanes are often used as Silane adhesion promoters,silane crosslinkers,silane moisture scavengers, silane coupling agents and silane resin modifiers in coatings & paints, adhesives & sealants,plastics & rubbers,mineral treatment and fiberglass composites domestic in China and worldwide.Our team has been in silane business for more than 15 years,during which we are awarded as an excellent supplier for hundreds of companies and also get “Technology Innovation Award”from them.
 （source：http://www.ac-chem.net/news/how-much-do-you-know-about-our-company-9bf9.html）

The application of silane coupling agent

Silane coupling agent is essentially a class of organic functional groups of silane, in its elements at the same time be able to have the quality and inorganic materials (such as glass, silica sand, metal, etc.) combined with the chemical reaction of groups and the organic matter and materials (synthetic resin Etc.) combined with the chemical reaction group.
The application of silane coupling agent can be broadly divided into three areas:
(A) for the surface treatment of glass fiber, glass fiber can improve the adhesion properties of resin and has greatly enhanced the glass fiber-reinforced composites strength, electrical, water resistance, anti-climate, such as performance, even in the wet, it the mechanical properties of composite materials to improve the results would be very significant. At present, the use of glass fiber silane coupling agent has been quite common for this area of silane coupling agent about the 50% of total consumption, which is used in more varieties is a Vinyltrimethoxysilane,Amino Silane, propylene-methyl silane and so on.
(B) inorganic filler used to fill plastic. Can be conducted in advance of the filler surface treatment, but also directly to join in the resin. Fill in the resin can improve the dispersion and adhesion, improving technology to enhance performance and fill plastic (including rubber), machinery, electrical and weather-resistant properties, and so on.
(C) used as a sealant, adhesive and paint the tackifier, to increase their bonding strength, water resistance, weather-resistant properties, and so on. Silane coupling agent is often able to resolve some of the adhesive material for a long time can not be solved. Silane coupling agent tackifier as the role of the principle that it is, there are two groups; a group and stick to the combination of frame materials; and the other is a group with the polymer material or adhesive , In order to form a strong bond interface chemical bonds higher, greatly improved the adhesive strength. The application of silane coupling agent in general there are three ways: First, as a reinforcing material surface treatment agent; second is added to the adhesive, three directly into the polymer material. From its full effectiveness and cost point of view, the first two methods better.
Silane coupling agent in the adhesives industry specific applications the following areas:
① structural adhesives in the metal and non-metallic bonding, the use of silane-type tackifier, and the metal oxide will be able to condensation, or with another silane alcohol condensation, so that the atoms of silicon and plastic materials were firmly on the surface Contact. If the phenolic structure of nitrile rubber silane for the addition of tackifier, can significantly improve the bonding strength.
② bonding in the glass fiber connection at home and abroad have been widely used for silane treatment agent. It can interface with the chemical reaction, so as to enhance the bonding strength. For example, if neoprene bonding agents do not have to deal with silane, peel strength for bonding 1.07 kg / cm 2, if used to make amino-silane agent, the bonding strength of the spin-off of 8.7 kg / cm 2.
③ in the rubber and other materials bonding, silane tackifier has a special function. It is clear to raise a variety of rubber and other materials of the bonding strength. For example, glass and polyurethane rubber bonding, if do not have to deal with silane agent, adhesive peel strength to 0.224 kg / cm 2, if the increase in silane, peel strength was 7.26 kg / cm 2.
④ have been unable to use ordinary adhesive bonding solution to the issue of silane coupling agent can be used at times to solve. Such as aluminum and polyethylene, silicone rubber and metal, silicone rubber and plexiglass can be based on chemical bond theory, the choice of silane coupling agent, to be a satisfactory solution. For example, the use of vinyl-tert-butyl peroxide silane (Y-4310) can bond with aluminum foil and polyethylene; butadiene with the three-silicone triethoxysilane can and pull away from the intensity of metal To reach 21.6 ~ 22.4 kg / cm 2. General adhesive resin or with the use of coupling agent can not only improve the adhesive strength, which is more important is to increase the adhesive force of the water resistance and durability. Such as polyurethane and epoxy resin materials, although many have high adhesive strength, adhesion, but the water resistance and durability is not ideal; adding silane coupling agent after this performance can be significantly improved .
Silane coupling agent of the other aspects of the application include:
① so that the immobilized enzyme attached to the glass substrate surface,
② oil well drilling in the sand,
③ so that the brick surface with a hydrophobic,
④ through the anti-moisture absorption, so that the fluorescent coating on the surface has a high resistance;
⑤ improve the column of liquid organic glass surface relative to the moisture absorption

（source：http://www.ac-chem.net/news/the-application-of-silane-coupling-agent-a9ec.html）

New silane coupling agents for truck tire applications

There are many applications of silane coupling agents,today,Nanjing Aocheng Chemical CO., LTD will tell you more about new silane coupling agents for truck tire applications are as follows:

The use of silica to reinforce elastomers is well known in the passenger car tire industry. The silica is chemically bonded to the rubber matrix using silane coupling agents. Sulfur-containing alkoxysilanes, such as 1-(trietboxy-silanyl)-3-[3-(triethoxy-silanyl)-propyltetrasulfanyl]-propane (5), often referred to as TESPT, and octanethioic acid S-[3-(triethoxy-silanyl)-propyl] ester (6), are used to covalently bond the rubber to the silica. The silanes (5) and (6) contain functional groups that react well with the rubbers typically used in passenger tire tread compound, such as styrene-butadiene rubber and butadiene rubber. Because these rubbers are chemically bonded or linked to the silica, the silica-filled elastomer is better able to transfer stress and has less hysteresis than carbon black-filled elastomers. In carbon black-filled elastomers, the rubber is physi-adsorbed onto the surface of the filler. These characteristics of the silica-filled elastomers reduce the rolling resistance and improve the wet traction of passenger car tires.

Reducing rolling resistance and extending wear life of tread compound are also of strong interest for truck tires. The tread compounds used in fabricating truck tires are based upon natural rubber. When silica replaces carbon black in natural rubber-based formulations, a reduction of rolling resistance is observed. However, these compounds have poor wear properties. Tread compounds containing silica filler and silanes (5) or (6) are unable to match the wear performance of tread compounds containing highly reinforcing carbon black fillers. The replacement of carbon black by silica in truck tread compounds has been stymied by ineffective coupling of the silica to natural rubber.

(source:http://www.ac-chem.net/news/new-silane-coupling-agents-for-truck-tire-applications-907e.html)