Molding silicone rubber

1.High tear and tensile strength 2. Easy de-mould 3. Acid and alkali-resistance 4. Low linear shrinkage

Applications:

 

MC  RTV2 moldmaking Silicone series are suited for reproduction of cement molding, concrete stones, artificial stones, plaster molding, figures, art objects, decoration molding, GRC products, gypsum products, resin products, PU molds. Etc.

 

 P series good for pouring mold making

Base and Curing Agent Mixture(100:2 by weight) in 25 C(77F) testing

P Item NO.	Characteristical before curing					Curing
	Part A		Part B	Part A+ Part B		Pot life at 250C mins	De-molding Time at 250C hours
	Appearance		Appearance	Ratio	Viscosity cps
RTV2015	White/ Translucent		Clear	100:2	20000	30	6
RTV2020	White/ Translucent		Clear	100:2	21000	30	6
RTV2025	White/ Translucent		Clear	100:2	22000	30	6
RTV2030	White/ Translucent		Clear	100:2	30000	30	6
RTV2040	White/ Translucent		Clear	100:2	30000	30	6
	Characteristical after curing 24 hours
	Hardness Shore A	Tear strength (N/mm)		Tensile Strength(Mpa)	Elongation break (%)	Linear Shrinkage
RTV2015	15±1	26±2		29±2	600	≤0.2%
RTV2020	20±1	28±2		30±2	550	≤0.2%
RTV2025	25±1	32±2		34±2	500	≤0.2%
RTV2030	30±1	34±2		36±2	450	≤0.2%
RTV2040	40±1	31±2		33±2	400	≤0.2%

  

 

DESCRIPATION

MC Silicone RTV2 mold making rubber is a two-component material, consisting of Part A base silicone and Part B CA30 curing agent, cures at room temperature by a condensation reaction. These materials can be cast into the cured silicone mold: plaster, polyurethane, PU, GRC, cement, resin, polyester, wax etc..

How to make the silicone mold?

lThe surface of the original should be clean and free of loose material. If your products with thin flower patterns, and especially with porous substrates, please use a suitable mold release agent such as soap water, detergent, Vaseline or petroleum jelly.

lMixing

 Please weight 100 Part A base and 2 parts of CA30 Curing Agent in a clean container. Thoroughly stir Part A base silicone before use, as filler separation may occur upon prolonged storage. Mixing Part A and Part B evenly until the CA30 completely dispersed in the base. Hand or mechanical mixing can be used, but do not for an extended period of time or allow the temperature to exceed 35C (95F). Mix suitably small quantities to ensure thorough mixing of base and curing agent.

It is strongly recommended that entrapped air be removed in a vacuum chamber, allowing the mix to completely expand and then collapse. After a further 1-2 mins under vacuum, the mix should be inspected and can be used if free of air bubbles. A volume increase of 3-5 times will occur on vacuum de-airing the mixture. So a suitably large container should be chosen.

l Pouring the mixture and curing

Pour the mixed Part A base silicone and CA-30 curing agent as soon as possible onto the original, avoiding air entrapment. The catalyzed material will cure to a flexible rubber within 6 hours (or faster by different mixing ratio or room temperature),we advice you de-mold after 24 hours ,it is will improve the replicate times of silicone mold.

 

Packing

20kg/drum,25kg/drum or 200kg/drum of Part A base silicone

0.25kg/bottle,1kg/bottle and 10kg/bottle of Part B CA30 Curing Agent

 

The information above is just for reference, if you're interested or have any questions, please feel free to contact Nicole:

 

 

Tel: 86-15874272919

Web:www(dot)mcsilicone(dot)com

E-mail:nicole(at)mcsilicone(dot)com

Skype:nicoleszmc

MSN: nicoleszmc (at)hotmail(dot)com

 

 

Molding silicone rubber