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- Silicone Oligomer Type AR
Silicone Oligomer Type AR
Type AR silicone oligomers are oligomeric coupling agents that can function as adhesion aids between organic resins and inorganic substrates because they contain reactive functional groups in addition to alkoxysilyl groups.
Type AR products are classified according to the type of various reactive functional groups such as epoxy and acrylic groups. These products are mainly used as coupling agents, taking advantage of the reactivity of alkoxysilyl groups to inorganic materials and the reactivity of various reactive functional groups to resins. Since it is less volatile than silane coupling agents, it is excellent for use in high temperature environments. It is also used as a flame retardant additive in some polycarbonate products.
| How to Use | Performance Features | ||
|---|---|---|---|
| Type A | Methyl Group | Coating agents, resin hybridizing agent | High hardness, water repellency, curability |
| Methyl group, Phenyl group | High gloss, compatibility, crack and peeling resistance | ||
| Type AR | Epoxy group | Coupling agent between organic resin and inorganic material | Adhesion improvement |
| Mercapto group | Adhesion improvement | ||
| Acrylic group | Adhesion improvement | ||
| Methacrylic group | Adhesion improvement | ||
| Vinyl group | Flame retardancy improvement | ||
| Type R | Alicyclic epoxy group | Main component and hybridizing agent for epoxy and acrylic compositions | Low cure shrinkage, heat resistance |
| Acrylic group | Flexibility and crack resistance | ||
Reaction Mechanism of Coupling Agents
- AO:
- A reactive group that chemically bonds with inorganic materials such as glass, metal, and silica stone.
- Methoxy group
- Ethoxy group, etc.
- R:
- Reactive group that chemically bonds with organic materials such as various synthetic resins
- Vinyl group
- Epoxy group
- Methacrylic group
- Mercapto group, etc.
Product List
| Product name/Item | Organic functional groups | Alkoxy group | Viscosity at 25°C (mm2/s) | Refractive index at 25°C | Alkoxy group amount (wt%) | Features |
|---|---|---|---|---|---|---|
| KR-517 | Epoxy | Methoxy/Ethoxy | 12 | 1.414 | 50 | Epoxy equivalent weight 830g/mol, hydrophilic antifouling properties |
| X-24-9590 | Epoxy | Methoxy | 350 | 1.448 | 9.5 | Epoxy equivalent 590g/mol |
| KR-516 | Epoxy/methyl | Methoxy | 50 | 1.441 | 17 | Epoxy equivalent 280g/mol |
| KR-518 | Mercapto | Methoxy/ethoxy | 20 | 1.418 | 50 | Mercapto equivalent 800g/mol, hydrophilic antifouling properties |
| KR-519 | Mercapto/methyl | Methoxy | 5 | 1.422 | 30 | Mercapto equivalent 450g/mol |
| KR-513 | Acryl/methyl | Methoxy | 35 | 1.450 | 20 | Acrylic equivalent weight 210g/mol, UV curing, resin adhesion |
| X-40-9296 | Methacryl/methyl | Methoxy | 20 | 1.450 | 22 | Methacrylic equivalent 230g/mol, UV curing, resin adhesion |
| KR-511 | Vinyl/Phenyl | Methoxy | 100 | 1.518 | 13 | Vinyl equivalent 530 g/mol, for resin modification |
(Not specified values)
Application
- Coupling Agents
- The major difference from silane coupling agents is volatility. The figure on the right shows a comparison between acrylic oligomers and silane coupling agents. The active ingredients remain even at high temperatures, contributing to better adhesion.
Comparison of Volatile Content between Acrylic Oligomer (KR-513) and Silane Coupling Agent (KBM-5103)
Results 8
KR-517
KR-517
- Alkoxy groups are methoxy groups and ethoxy groups.
- Epoxy equivalent 830g/mol
X-24-9590
X-24-9590
- Alkoxy groups are methoxy groups.
- Epoxy equivalent 590g/mol
KR-516
KR-516
- Alkoxy groups are methoxy groups.
- The organic functional groups have methyl groups in addition to the epoxy groups.
- Epoxy equivalent 280g / mol
KR-518
KR-518
- Alkoxy groups are methoxy groups and ethoxy groups.
- Mercapto equivalent 800g/mol
KR-519
KR-519
- Alkoxy groups are methoxy groups.
- Organic substituent has both methyl group as well as mercapto group
- Mercapto equivalent 450g/mol
KR-513
KR-513
- Alkoxy groups are methoxy groups.
- Acrylic equivalent 210g/mol
- Applicable to UV/EB curing system
- Lower volatility than KBM-5103 (monomer type)
X-40-9296
X-40-9296
- Reactive functional groups are methacrylic groups.
- Methacryl equivalent 230g/mol
- Applicable to UV/EB curing system
KR-511
KR-511
- Reactive functional groups are Vinyl groups.
- Vinyl equivalent 530g/mol
- Flame retardant for Polycarbonate