PU 45 Liquid Polyurethane Moulding Rubber for Plaster Mold Polyurethane

• Raw Material: Synthetic Rubber
• Material: Polyurethane Rubber
• Appearance: Liquid
• Form: Liquid Rubber
• Item: Mc-PU45
• Color: a: Transparent B: Yellow
• Model NO.: MCPU-45
• Mixing Ratio: 1:1
• Mixed Viscosity: 2500 Cps
• Hardness: 45 Shore a
• Pot Life: 25~30 Mins
• Curing Time: 24 Hrs
• Tensile Strength: 4~7 MPa
• Tear Strength: 18~22 N/mm
• Elongation: 500~600%
• Shelf Life: 6~10 Months
• Transport Package: 20kg/Drum, 200kg/Drum
• Specification: SGS. REACH. FDA. MSDS. ISO9001
• Trademark: MC silicone
• Origin: China
• HS Code: 39100000
• Production Capacity: 4000kg/Day

Product Description

A	Type	MCPU40 A	MCPU50 A	MCPU60 A	MCPU70 A	MCPU80 A	MCPU90 A
	Appearance	Colorless or light yellow transparent liquid
	Viscosity(30ºC)mPa·s/	2500±300
B	Type	MCPU40 B	MCPU50 B	MCPU60 B	MCPU70 B	MCPU80 B	MCPU90 B
	Appearance	Light yellow liquid
	Viscosity(30ºC)/mPa·s	560±200
Ratio A:B(mass ratio)		1:1
Appearance		Light yellow
Operation temperature/ºC		25~40
Gel time(30ºC)^*/min (variable)		25-30	25-30	25-35	20-30	8-14	6-9
Hardness (shore A)		40±3	50±3	60±3	70±3	80±3	90±3
Tensile strength/MPa		4-7	5-8	5-8	8-11	9-14	18-25
Elongation at break/ %		500-600	400-500	300-400	250-350	350-550	400-500
Tear strength/(kN/m)		18-22	18-22	20-25	26-30	50-60	70-85
Rebound/ %		30-35	30-35	30-35	30-35	36-40	32-35
Specific gravity(25ºC)(g/ cm^3)		1.18

PU 45 Liquid Polyurethane Moulding Rubber for Plaster mold polyurethane 
Description of Urethane Liquid Rubber For Mold Making :

Polyurethane Liquid Rubber for Mold Making (room temperature cure) is a type of mold making rubber made from a two-component system (It consists of A&B component, B is curing agent, and A is polyurethane prepolymer.)available in a hardness range of very soft to medium - usually from 40 Shore A to 90 Shore A. 

Characteristics of Urethane Liquid Rubber For Mold Making:

It has excellent processing properties, solid in common temperature, shorter gel time, and regulating color by adding pigment. The ware has good properties of abrasive resistance, hydrolysis resistance, transparent, good resilience, stable dimension.

Applications of Urethane Liquid Rubber For Mold Making :
Urethane Liquid Rubber For Mold Making is suitable for manufactured stone, concrete wall panel, cultured stones and architectural elements.

 

Instruction

Mixing:
1.Shake both A and B sides vigorously.

Shake or stir well before use The liquid components may settle in the containers during storage. Let it sit a few minutes to let any bubbles rise to the surface after shaking the container.

2.Measure out equal parts, by volume, of A and B into clean plastic or metal containers.
Combine both sides into a third clean mixing container and mix vigorously for at least one minute, taking care to scrape the sides and bottom of the mixing container with your mixing utensil, until the product is one uniform color.

Notes:

1.Always wear a respirator or self -contained breathing apparatus when working with urethanes.

2.Use between 65F and 75F in a humidity-controlled environment.

3.It is always best to mix the material by hand, with a plastic or metal mixing utensil.Avoid mixing with drill motors because of the friction they generate, mixing with electric drills can start the exothermic cure process and cause the product to cure in the mixing container.

4.Don't vary the mix ratio. Unlike some polyester resins, altering the mix ratio to vary the cure cycle will not work with urethanes.

5.Mix in clean plastic containers. Paper cups and wooden mixing utensils may contain moisture which can adversely affect the urethane rubber. Avoid waxed paper cups because the wax may melt and contaminate the rubber.

6.Air bubbles in urethanes are almost always caused by moisture. Do everything possible to avoid moisture getting into the mix.

7.Replace the lids onto the containers promptly after use. Do not use the urethane rubber during rainy days or times of high humidity.

8.Avoid pouring against an unsealed water based product such as plaster or hydrocal. Seal plaster or hydrocal with a product like Krylon Clear Acrylic.

9.Avoid mixing a large batch- The larger the batch, the more exotherm or heat is generated in the cure cycle. If you are making a large mold, mix small batches to make the process more manageable.

 

Package of Urethane Liquid Rubber For Mold Making :

 20kg/drum, 200kg/drum

 

Storage of Urethane Liquid Rubber For Mold Making :

Store in cool and dry place. If you can't use one drum up at a time, please inject N₂.The storage time of original packing is 6~10 months.