CAS NO.: 2530-83-8

An epoxy functional silane, Silquest A-187 silane is specially formulated for use as an adhesion promoter in SPUR + * prepolymer, urethane, epoxy, polysulfide, silicone and acrylic systems for caulks, coatings, sealants and adhesives. 
Silquest A-187s epoxy functionality allows Silquest A-187 silane to perform as a durable epoxy ring that is reactive with many organic functions. 
Silquest A-187 also offers non-yellowing adhesion in many resin systems and has proven to increase the flexibility of systems when compared to other adhesion promoters under certain conditions.
An epoxy functional silane suitable for use as adhesion promoters in polysulfide, urethane, epoxy and acrylic caulks, sealants and adhesives.

Working as a trimethoxy silane, Silquest A-187 silane bonds to inorganic substrates to provide excellent wet and dry adhesion along with a rapid hydrolysis rate. 
Silquest A-187 silane also demonstrates enhanced electrical properties in epoxy-based encapsulants and packaging materials, the result of improved bonding between resin and substrate or filler. 
Formulated to enhance wet adhesion, Silquest A-187 silane also benefits epoxy encapsulation systems through Silquest A-187s enhanced safety of semiconductor or integrated circuits, which Silquest A-187 guards from water ingress or surface corrosion.  

Silquest A-187 Silane is an epoxy functional silane by Momentive Performance Materials. 
Acts as an adhesion promoter for water-borne coatings applications. 
Epoxy functionality will offer non-yellowing adhesion in many resin systems. 
Silquest A-187 may improve flexibility of systems vs other adhesion promoters. 
Trimethoxy silane bonds to inorganic substrates to provide very good wet and dry adhesion. 
Silquest A-187 Silane also offers fast hydrolysis rate.

Description of Silquest A-187:
Silquest A-186 silane and Silquest A-187 silane are epoxy functional silanes which may be suitable for use as adhesion promoters in SPUR, urethane, epoxy, polysulfide, silicone, and acrylic caulks, coatings, sealants and adhesives.

Silquest A-186 silane and Silquest A-187 silane are soluble in water after hydrolysis, alcohol, acetone and most aliphatic esters at normal application levels under five percent. 
Hydrolysis releases methanol.

Characteristic and Usage of Silquest A-187:   
Silane A-187 is a new type of bifunctional coupling agent with epoxy group and trimethoxysilyl group, can be easily hydrolyzed and crosslink. 
The dual nature allows K-56 bind chemically both inorganic materials (glass, sand, fillers) and organic polymers (thermosets, thermoplastics)
1. Glass fiber/glass fabric: as a finish or size ingredient
2. Foundry resin: as an additive to polyurethane resins 
3. Mineral filled composites: for pretreatment of fillers and primer for improving adhesion to the polymer
4. Paints and coatings: as an additive and as a primer for improving adhesion to the substrate, especially glass and metal.

Silquest A-187 Description:
Silquest silanes are versatile products that react with a wide variety of organic and inorganic materials. 
Their unique ability as coupling agents, crosslinking agents, and surface modifiers has been proven in an ever-increasing number of applications, ranging from fuel-saving silica tires, adhesives to coatings to fiberglass reinforced composites.

Silquest A-187 Description:
Chemical Name: I -Glycidoxypropyltrimethoxysilane
Glycidyl 3-(trimethoxysilyl)propyl ether;
CAS NO.: 2530-83-8
EINECS NO.: 219-784-2
Chemical structure:

Silquest A-187 silane is an epoxy functional silane which may be suitable for use as adhesion promoters in SPUR+, urethane, epoxy, polysulfide, silicone, and acrylic caulks, coatings,sealants and adhesives. 
Silquest A-187 enhances electrical properties of epoxy based electronic encapsulant and packaging materials.

Properties of Silquest A-187:
The use of USi-2301 as a coupling agent. 
In mineral-filled plastics improves filler dispersibility, reduces its sedimentation tendency and greatly lowers the resin's viscosity. 
In addition, Silquest A-187 leads to higher filler loading and a marked increase in water (vapor) resistance, as well as resistance to acids and bases. 
As a component of adhesives and sealants, USi-2301 improves both adhesion to the substrate and mechanical properties such as flexural strength, tensile strength and modulus of elasticity.

Typical Technical Data:
Appearance: Colorless transparent liquid
Colour (Pt-Co): 25 max
Specific Gravity (I 20A C,g/cm3): 1.060 ~1.075
Refractive Index ( ): 1.4275~1.4300
Purity (by GC, %): 98.0 min

Silanes are used as coupling agents, crosslinking agents and surface modifiers and can impart improved physical properties in various specialty products and applications. 
These range from fuel-saving silica tires and high performance coatings, to adhesives, sealants, and wire and cable jacketing and insulation.

Silanes are used in various organic materials, such as coatings, adhesives and sealants, silica and fiberglass, to help those materials bond to a variety of surfaces, including rubber, glass, metal, stone and plastic, and other more challenging substrates, such as PVC, acrylics and polylaminates. 
As coupling agents, crosslinking agents and surface modifiers, silanes can be used to promote better adhesion and easier mixing under a variety of conditions. 
Depending on the application, silanes can also enhance certain surface properties, help avoid corrosion and improve thermal stability, hardness, chemical and moisture resistance, wet traction, rolling resistance, flow, leveling, coefficient of friction and other desired characteristics.

uses of Silquest A-187:
1. As a surface treatment agent for inorganic fillers, Silquest A-187 is widely used in clay, talc, wollastonite, white carbon black, quartz, aluminum powder, copper powder and iron powder.
2. Silquest A-187 improves the adhesion of solvent-based acrylic, polyurethane and epoxy coatings.
3. Silquest A-187 is used in water-based acrylic and polyurethane water-based coatings, as an adhesion promoter and cross-linking agent. Improve the bonding strength, water resistance, abrasion resistance, scrub resistance, scratch resistance and chemical resistance of the coating.

Epoxy Functionality
-Epoxy ring is reactive with many organic functionalities.
-Epoxy functionality will offer non-yellowing adhesion in many resin systems.
-May improve flexibility of systems vs. other adhesion promoters.

Trimethoxy Silane Functionality
-Bonds to inorganic substrates to provide excellent wet and dry adhesion.
-Very fast hydrolysis rate

Silquest A-187 is mainly used to improve the adhesion between the surface of organic material and inorganic material.
Silquest A-187 can alsobeused in adhesive to strengthen the adhesion. 
The suitable resins include epoxy, phenol aldehyde, melamine, polysulfider-polyamino ester, en-polyphenyl, etc.

Improve the adhesion between inorganic stuffing, base material and resin, hence improve he mechanical strength, electric property of composite material and high retention in wet state.
As the surface treating agent of inorganic stuffing, widely used in pottery clay, talcum powder, silicon grey clay, white carbon black, silica, aluminum powder, iron powder, etc.
As epoxy sealing agent to stuff silica, epoxy concrete remedy material or coating to stuff sand and epoxy mould material to stuff metal.
Improve the adhesion of double-component epoxy sealing agent, acrylic acid latex, sealing agent, polyamino ester, epoxy coating.

Enhanced electrical properties of epoxy based electronic encapsulant and packaging materials, resulting from improved bonding between resin and substrate or filler.
Silquest is a trademark of Momentive Performance Materials Inc.
An excellent candidate for waterborne applications such as acrylic and vinyl-acrylic caulks.
Improved adhesion to glass, and metal substrates can be obtained in epoxy, polysulfide, urethane and acrylic bases adhesives, sealants and caulks.
SPUR+ perpolymer applications benefit from adhesion without decrease in elongation and yellowing.
Urethane applications benefit from enhanced adhesion to glass and metal substrates, while providing improved shelf stability over amino silane alternatives. 
Typical use level ranges from 0.5 to 1.5 pbw.

Epoxy applications benefiting from the use of Silquest A-186 silane or Silquest A-187 silane include quartz filled epoxy encapsulants, pre-mix formulations, sand-filled epoxy concrete patching materials, and metal filled epoxy materials suitable for mold die tools.
Epoxy encapsulation systems benefit from Momentive Performance Materials epoxy family of Silquest silanes' ability to enhance wet adhesion, reducing the risk of semiconductor or integrated circuit failure due to water ingress or surface corrosion.
Typical use level is 1.0 pbw.

Polysulfide applications benefit from enhanced adhesion performance, without suffering odor issues associated with mercapto based silanes. 
Typical use level ranges from 0.5 to 1.5 pbw.

Latex caulk applications benefit from enhanced adhesion to glass and metal substrates, without suffering yellowing issues associated with amino silane adhesion promoters. 
Typical use level ranges from 0.2 to 0.5 pbw.

Moisture-initiated crosslinking of resins, improved wet adhesion, primerless adhesion to many materials, improved chemical resistance, weatherability and durability

Coatings / Inks: 
Moisture-initiated crosslinking of resins, improved adhesion, chemical and corrosion resistance, weatherability, pigment dispersion and scrub resistance

Fiber Reinforced Composites and Glass Insulation: 
Coupling of resins with fibers for improved resiliency of insulation batts, better wet strength retention and electrical properties of FRP composites, and improved fiber strand integrity, protection and handling

Filler Treatment: 
Improved coupling of resins with fillers, better filler dispersion and processing ease in thermoset and thermoplastic resins

Polymer Modification:
Moisture-cure crosslinking for improved environmental and chemical resistance

Rubber and Elastomers:
Coupling of resins with minerals for improved composite strength, toughness, abrasion resistance, rolling resistance, wet electrical properties and rheology control, fewer mixing steps and better silica dispersion

Moisture-initiated crosslinking of resins, improved adhesion, chemical resistance, filler dispersion and weatherability

Moisture-curable crosslinked polyethylene for wire & cable and polyethylene crosslinked (PEX) pipe, mineral and pigment treatment for dispersibility and coupling of resins with fillers in high performance thermoplastics

Coupling silica in tire compounds to improve the rolling resistance,traction and wear. 
New generation silanes may facilitate higher-efficiency tire manufacturing while enhancing tire performance.

Silane, [3-(2,3-epoxypropoxy)propyl]trimethoxy-
A 187; DZ 6040
Glycidyl 3-(Trimethoxysilyl)propyl ether
KBM 403
KBM 430
Silan A 187
Silane A 187
Silane Z 6040
Silicone A 187
Silicone KBM 403
Y 4087
Z 6040
NUCA 187
Union carbide a-187
Dow corning Z-6040
Dynasylan GLYMO
Prosil 5136
Silane, 3(glycidoxy)propyl trimethoxy-
Oxirane, 2-((3-(trimethoxysilyl)propoxy)methyl)-
3-(Trimethoxysilyl)propyl glycidyl ether
NSC 93590
Silicone KBM 403
Silane A 187
Union carbide A-187
Silan A 187
Silane Z 6040
Glycidyl 3-(trimethoxysilyl)propyl ether
NUCA 187
Silane coupler KH-560
KBM 403
KBM 430
3-(Trimethoxysilyl)propyl glycidyl ether
DZ 6040
Silane, trimethoxy[3-(oxiranylmethoxy)propyl]-
A 187
NSC 93590
Y 4087
Z 6040
Silicone A 187
Silane, trimethoxy[(oxiranylmethoxy)propyl]-
Silane, [3-(2,3-epoxypropoxy)propyl]trimethoxy-
Silane, trimethoxy(3-(oxiranylmethoxy)propyl)-
Silane, (3-(2,3-epoxypropoxy)propyl)trimethoxy-
Oxirane, 2-((3-(trimethoxysilyl)propoxy)methyl)-
Oxirane, 2-[[3-(trimethoxysilyl)propoxy]methyl]-
Silicone A-187
Oxirane, 2-[[3-(trimethoxysilyl)propoxy]methyl]-, homopolymer
3-Glycidoxypropyltrimethoxysilane, 97%
CCRIS 3044
EINECS 219-784-2
BRN 4308125
Dynasylan GLYMO
EINECS 247-194-5
Glycidoxypropyltrimethyoxysilane, gamma-
Prosil 5136
Dow corning Z-6040
EC 219-784-2
3-glycidoxypropyl trimethoxysilane
3-glycidoxypropyltrimethoxy silane
3-glycidoxy propyl trimethoxysilane
3-glycidoxy propyl trimethoxy silane
Glycidyl 3-Trimethoxysilylpropyl Ether
Silane, 3(glycidoxy)propyl trimethoxy-
(3-Glycidoxypropyl)Trimethoxysilane, 97%
3-(2, 3-Epoxypropoxy)Propyltrimethoxysilane
(3-Glycidyloxypropyl)trimethoxysilane, >=98%
3-(2,3-Epoxy Propoxy) Propyltrimethoxysilane
Trimethoxy[3-(2-oxiranylmethoxy)propyl]silane #
(3-Glycidyloxypropyl)trimethoxysilane, >=97% (GC)
dow corning z-6040 epoxyfunctional silicone adhesive additive
3-Glycidoxypropyltrimethoxysilane Glycidoxypropyltrimethoxysilane Epoxy Functional Silane

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