Dow SILASTIC Q3-3636 Adhesive Base & Catalyst

Features Of Dow SILASTIC Q3-3636 Adhesive Base & Catalyst

1. Two-part, platinum-catalyzed liquid silicone rubber (LSR) adhesive system offering excellent adhesion to diverse substrates including silicone, metals, and engineered plastics.

2. Low-viscosity base combined with a precise catalyst ratio enables smooth dispensing, uniform mixing, and consistent cure profile across automated production lines.

3. Fast room-temperature or heat-accelerated cure—achieving handling strength in minutes and full physical properties within 24 hours at ambient conditions.

4. Exceptional thermal stability and long-term flexibility over a wide service temperature range (–55 °C to +200 °C).

5. Meets ISO 10993-5 cytotoxicity requirements for medical device assembly applications when fully cured.

Typical Applications Of Dow SILASTIC Q3-3636 Adhesive Base & Catalyst

1. Medical device bonding: catheter hubs, sensor housings, and implantable component assemblies requiring biocompatibility and reliability.

2. Automotive sensors and electronic encapsulation where vibration resistance and environmental sealing are critical.

3. Consumer electronics: waterproof gasketing and structural bonding of wearable device enclosures and flexible displays.

4. Industrial fluid handling components: sealing of silicone diaphragms, valves, and pump housings exposed to oils and mild chemicals.

5. Appliance manufacturing: bonding of silicone seals to stainless steel, aluminum, or polycarbonate in cooking and HVAC systems.

Specifications Of Dow SILASTIC Q3-3636 Adhesive Base & Catalyst

Compatible Systems Of Dow SILASTIC Q3-3636 Adhesive Base & Catalyst

Dow SILASTIC Q3-3636 Adhesive Base & Catalyst – Frequently Asked Questions (FAQ)

Q1: What is the CAS Registry Number for Dow SILASTIC Q3-3636?

A: The Base component (Part A) has CAS No. 68037-59-2; the Catalyst component (Part B) has CAS No. 13463-67-7 (platinum-divinyltetramethyldisiloxane complex). Full formulation details are provided in the Safety Data Sheet (SDS).

Q2: Can Q3-3636 be used without heat curing in high-volume production?

A: Yes—Q3-3636 achieves functional handling strength at room temperature within 4–6 hours and full properties after 24 hours. However, heat curing (e.g., 80 °C for 10 minutes) is recommended for production throughput, improved crosslink density, and reduced post-cure migration risk.

Q3: How does Q3-3636 compare to Q3-3634 in terms of adhesion performance and extraction profile?

A: Q3-3636 features enhanced adhesion promoters for broader substrate compatibility (especially to untreated thermoplastics), while maintaining lower volatile extractables (<0.5% w/w per USP <661.1> test protocol) versus Q3-3634 due to optimized siloxane chain architecture and catalyst purity.

Q4: Is Q3-3636 suitable for food-contact applications under FDA 21 CFR §177.2600?

A: Yes—when fully cured and validated per end-use conditions, Q3-3636 complies with FDA 21 CFR §177.2600 for repeated-use food-contact articles. Migration testing (e.g., overall migration limit ≤10 mg/dm²) must be conducted on final bonded assemblies.

Q5: Does Q3-3636 require primer or surface activation before bonding to low-surface-energy plastics like PP or PE?

A: Primer is not required for most applications; however, plasma or corona treatment of polyolefin surfaces is strongly recommended to ensure durable, long-term bond integrity under thermal cycling or humidity exposure.