1. Product Overview
Chloroplatinic acid isopropanol platinum solution, also named Speier’s Catalyst, is the traditional classic hydrosilylation catalyst for addition silicone rubber. Its main component is hydrogen hexachloroplatinate dissolved in isopropanol solvent, CAS No. 16941-12-1. It presents reddish-brown transparent liquid with low procurement cost, widely adopted for ordinary industrial silicone products with low appearance requirements.
This platinum water features simple production process and ultra-low raw material cost, greatly cutting your catalyst input expense. However, it contains free hydrochloric acid residues, which will cause silicone products to turn yellow and amber after curing & long-term storage, with weaker anti-poisoning performance and slower curing speed compared with Karstedt platinum complex. It is the most cost-effective choice for general industrial silicone manufacturing without strict transparency demand.
2.Technical Specifications
| Test Item | Standard Index |
|---|---|
| Chemical Name | Hydrogen hexachloroplatinate(IV) isopropanol solution |
| CAS Number | 16941-12-1 |
| Appearance | Reddish-brown transparent liquid |
| Platinum Concentration | 1000ppm / 2000ppm / 3000ppm / 5000ppm customizable |
| Solvent | Isopropanol |
| Specific Gravity (25℃) | 0.85–0.95 g/cm³ |
| Recommended Dosage | 0.1%–0.8% of total silicone compound |
| Curing Temperature Range | 80℃–160℃, requires higher heating temperature |
| Unopened Shelf Life | 10 months under cool dark sealed storage |
| Acid Content | Contains residual hydrochloric acid |
3. Key Performance Features
- Extremely low unit cost, obvious cost advantage for mass production of low-end silicone goods.
- Good compatibility with common vinyl silicone oil, solid silicone rubber and silicone resin.
- Easy to dilute and mix evenly with silicone base materials, simple feeding operation.
- Stable storage in sealed dark environment, no rapid platinum precipitation within shelf life.
- Suitable for high-dosage formula design to reduce curing time partially.
- Raw material supply is sufficient, stable stock and fast delivery for bulk orders.
4. Core Advantages
4.1 Ultra Low Cost, Reduce Raw Material Expense
Compared with high-activity Karstedt platinum complex, this traditional platinum water has far lower purchase price, perfectly matching factories producing low-margin industrial silicone parts.
4.2 Mature & Stable Classic Formula
Speier’s catalyst has been widely used in silicone industry for decades, stable catalytic effect, no complicated formula adjustment required for ordinary silicone production lines.
4.3 Simple Operation & Good Miscibility
Dissolves rapidly in vinyl silicone system without agglomeration, no special high-speed stirring equipment needed during mixing.
4.4 Large Batch Supply Capacity
We support tons of bulk shipment, stable stock all year round, customized platinum concentration to match customer’s cost budget.
5. Disadvantages (Objective Description for Customer Reference)
- Prone to yellow discoloration: Acid residues will gradually turn silicone yellow after curing, cannot be used for transparent, food-grade and medical silicone products.
- Weak anti-poisoning performance: Easily deactivated by trace sulfur, nitrogen, phosphorus impurities, leading to surface sticky or incomplete curing defects.
- Higher curing temperature required: Low catalytic activity, need longer baking time or higher temperature, increasing power consumption.
- Corrosive to metal molds: Free acid inside will cause slight corrosion on aluminum and iron molds after long-term continuous production.
6. Application Fields
Only applicable to general industrial silicone products without high transparency requirements:
- Ordinary industrial solid silicone extruded tubes, silicone sheets, non-transparent sealing gaskets
- Low-cost silicone mold for industrial non-transparent crafts
- Common silicone coating, non-transparent silicone printing ink
- Ordinary electronic non-transparent potting silicone, insulation silicone gel
- General textile silicone softener, low-grade modified silicone oil synthesis
- Non-transparent household silicone accessories without food contact standard
7. Packaging Specifications
Standard Stock Packages
- Lab Test Sample: 100g / 250g amber plastic bottles with airtight caps
- Small Batch Production: 1kg / 5kg HDPE plastic jerrycans
- Large Industrial Shipment: 25L plastic drums, 200L plastic-lined iron barrels
Custom Service
- Custom private brand labels on all packages
- Export pallet packaging with stretch film for sea freight
- Free small test samples available for formula trial
- Airtight anti-volatile packaging to avoid platinum concentration deviation during transit
8. Storage & Transportation Guidelines
- Storage: Keep tightly sealed, store in cool, dark, ventilated warehouse at 10–28℃; avoid direct sunlight and heat sources.
- Forbidden Contact: Separate from sulfur, amine, tin, lead compounds, peroxide vulcanizing agents to prevent catalyst poisoning.
- Transport Classification: Class 3 flammable liquid, comply with IMDG sea transport and IATA air freight rules.
- Shelf Life: 10 months unopened; finish within 2 months after opening and re-seal immediately.
9. Operation Precautions
- Mix evenly into vinyl silicone first before adding hydrogen-containing silicone oil.
- Not recommended for transparent, food contact and medical silicone products due to yellowing risk.
- Wear gloves and goggles during operation; avoid long-time skin contact, flush with clean water once splashed.
- Do not store together with metal molds for long-term soaking, clean molds after daily production.
- If anti-yellowing and high transparency are required, please select our Karstedt transparent high activity platinum catalyst.
- Hi, Winstar Silicone company, we are interested in your product silicone color masterbatch, could you please offer some free samples to us？ Our company address: ***LA,USA
- Hello Winstar, our product is compression molding product,could you advise which peroxide curing agent to use ?
- Hi friend, we have some problem in silicone to PVC bonding, that bonding strength is not well at all, how to improve it please ?
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