Liquid Polyisoprene Rubber (L-IR) , CAS No.L684790

CAS: L684790 Cat. No.: L684790

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Overview

LIQUID RUBBER products function as “reactive plasticizers”, but have much higher molecular weight than normal plasticizers. This means that in the time-consuming and labor-intensive rubber mixing process, they help reduce mooney viscosity and facilitate the mixing process. Better flowability of the compound increases the efficiency of the mixing process significantly. The physical properties of the rubber compounds are retained. Another advantage of the improved viscosity is also a longer service life of the mixing equipment, as the mixer can “stir” the compound better.

 

LIQUID RUBBER as a reactive plasticizer

LIQUID RUBBER includes Liquid Butadiene Rubber (L-BR), Liquid Isoprene Rubber (L-IR) and Liquid Polystyrene-Butadiene Rubber (L-SBR). The high-viscosity synthetic rubbers are colorless, transparent, almost completely odorless and have low VOC values. The polymers of butadiene, isoprene and styrene have a low molecular weight, which is designed between solid rubber and plasticizer.

LIQUID RUBBER grades are co-vulcanizable with the base rubber to prevent migration. The significantly reduced migration massively improves the shelf life and durability of the products. Depending on the molecular weight of the grades, they can either replace part of the rubber in the formulation (high molecular weight) or replace all or part of the oil in the formulation (low molecular weight).

Features and benefits

• Reduces mixing time and energy consumption

• Strong tack and adhesive properties
• Low glass transition temperature (Tg)
• Rubber-like properties at low temperatures
• Colorless, transparent and low VOC
• Co-vulcanizable and reduces migration which improves the products shelf life

Applications

• Adhesives, coatings, sealants
• Electronics
• Industrial & construction
• Mobility
• Oil modification
• Rubber compounding
• Sporting goods & footwear

LIQUID RUBBER products are used for a wide range of applications. An important area of application is tires, where LIQUID RUBBER grades can be used for various tire compounds, including tread, carcass, sidewall and bead filler compounds.

LIQUID RUBBER is the product of choice in the manufacture of winter tires, all-season tires and high-performance tires. It reduces Mooney viscosity, which minimizes migration while improving the workability of the rubber compound. LIQUID RUBBER significantly improves tire performance by simultaneously managing the balance between grip, fuel efficiency and wear resistance. LIQUID RUBBER is also popular for belts, hoses and other rubber goods.

Other applications of LIQUID RUBBER include high-performance coatings, sealants and adhesives. In adhesives, Liquid Isoprene Rubber is used as a tackifier and plasticizer. But LIQUID RUBBER is also used for printing plates, mortars and rubber compounding (e.g. for conveyor belts).

 

LIQUID RUBBER is used in various tire applications with exceptional properties.

Aladdin has developed several high-vinyl grades for peroxide curing and Liquid Isoprene Rubber grades for EPDM applications. At the same time, the volatile organic compound (VOC) content of the products is reduced. Possible applications include sanitary components, as LIQUID RUBBER/EPDM compounds can meet local drinking water regulations.  

There are three types of LIQUID RUBBER based on the following:

1. Liquid Polybutadiene Rubber (L-BR)
2. Liquid Polyisoprene Rubber (L-IR)
3. Liquid Polystyrene-Butadiene Rubber (L-SBR)

The types are available from low to high molecular weight variations and some feature functionalized groups.

Functionalized Grades

Malenized L-IR (403) & Carboxylated L-IR (410)

Aladdin has developed selected copolymers with high molecular weight and different functionalities. Malenized L-IR-403 and Carboxylated L-IR-410 are carboxylated liquid isoprene rubbers (L-IR) that can improve the adhesion of rubbers to metal and the dispersion of fillers in rubbers. Applications of L-IR-403 and L-IR-410 include automotive sealants, coatings and adhesives, as well as hot melt adhesives/PSA (SIS, SBS, EVA).

Carboxyl groups generally have reactivity or affinity to polar substances, so these types are expected to have an additional function besides plasticizing effect and vulcanizability. Both types can improve the adhesion properties of rubber to various metals in addition to the reactive plasticizer function. The adhesive properties are stable even after heat aging.

L-IR-403

L-IR-410

UV-Curable L-IR

The field of application for UV-curable L-IR is pressure-sensitive adhesives (UV-curable adhesives). The material is characterized by good flexibility, which comes from the polyisoprene structure and, in addition to good low-temperature properties, also has a low shrinkage ratio. Moisture absorption and permeation resistance are good. In addition to its excellent adhesive properties, UV-curable L-IR also has insulating properties.

UC-102M | UC-203M

Name	Functional basis	itm	Model	Molecular Weight	Melt Viscosity (Pa•s at 38°C)	Glass Transition Temp. (°C)
Liquid Polyisoprene Rubber (L-IR)	Homopolymer	L684788-LIR30	L-IR-30	28000	70	-63
Liquid Polyisoprene Rubber (L-IR)	Homopolymer	L684788-LIR50	L-IR-50	54000	500	-63
Liquid Polyisoprene Rubber (L-IR)	Copolymer	L684788-LIR390	L-IR-390	48000	400	-95
Liquid Polyisoprene Rubber (L-IR)	Malenized	L684790-LIR403	L-IR (403)	34000	200	-60
Liquid Polyisoprene Rubber (L-IR)	Carboxylated	L684790-LIR410	L-IR (410)	30000	430	-59
Liquid Polyisoprene Rubber (L-IR)	UV-Curable	L684790-UC102M	UC-102M	17000	30	-60
Liquid Polyisoprene Rubber (L-IR)	UV-Curable	L684790-UC203M	UC-203M	35000	190	-60
Liquid Polybutadiene Rubber (L-BR)	Homopolymer	L684795-LBR302	L-BR-302	5500	0.6	-85
Liquid Polybutadiene Rubber (L-BR)	Homopolymer	L684795-LBR307	L-BR-307	8000	1.5	-95
Liquid Polybutadiene Rubber (L-BR)	Homopolymer	L684795-LBR305	L-BR-305	26000	40	-95
Liquid Polybutadiene Rubber (L-BR)	High Vinyl L-BR	L684795-LBR352	L-BR-352	9000	6	-60
Liquid Polybutadiene Rubber (L-BR)	High Vinyl L-BR	L684795-LBR361	L-BR-361	5500	3.5	-49
Silane-modified liquid butadiene rubber (GS-L-BR)	GS-L-BR (Graft silane)	S684797-GSLBR	GS-L-BR-114*	6000	6	-50
Liquid Polystyrene-Butadiene Rubber (L-SBR)	Copolymer	L684801-LSBR870	L-SBR-870	6000	250	-18
Liquid Polystyrene-Butadiene Rubber (L-SBR)	Copolymer	L684801-LSBR822	L-SBR-822	8800	8.3	-60
Liquid Polystyrene-Butadiene Rubber (L-SBR)	Copolymer	L684801-LSBR841N	L-SBR-841N	10000	100 (at 60˚C)	-60

Specifications

Storage

Room temperature

Shipped In

Normal