Chemical Composition, Low Monol silyl terminated Polyether with trifunctional methoxy groups.
Physical form, Clear thick liquid, viscosity approx 30000 Mpa. S.
This is a low monol STPP hybrid polymer based on polyether of approx 24000 MW. The shore A hardness of the resin cured with DBTDL is approx 20.
The resin is designed to be used with DIDP plasticizer and precipitated calcium carbonate to formulate construction and other joint sealants with shore A hardness in the range of 15 to 25.
The trifunctional methoxy groups can be catalyzed to cross link with various chemicals that are well known, however extra vinyl silane needs to be added in compounding, and the use on methanol can further retard the cross linking reaction when used in thick walled HDPE cartridges.
The advantage of the STPP resin with very low monol polyether is that a high level of DBTDL plasticizer can be added, and the sealant cures with no residual surface tack.
Use epoxy silanes and secondary amino silanes for superior adhesion as construction sealants.
The main requirements for exterior sealants are:
Low modulus even at low temperatures
Excellent UV resistance
High colour stability and no colour change
Good adhesion to porous and non-porous substrates
High tear resistance
Paint ability when needed
Resistance to cleaning procedures
Bubble free Curing
No surface tack that gathers dust and dirt
Hybrid sealants based on Risun 30000D meet the above requirements.
Risun Polymer for Adhesive requirements
Adhesives for hard floors such as sports arenas require:
High mechanical strength and recovery
High vibration resistance
Good chemical resistance
Excellent adhesion properties
Hard sports surfaces such as these are placed on concrete slabs and the products required are:
Moisture resistant membrane based on Risun 30000D
Adhesive layer based on Risun 15000T
Expansion joints in the wood floor based on above construction sealant.
RISUN 30000D POLYMER ADVANTAGES:
Softest long chain polyether for lower shore A sealants with high movement capacity to 20% ASTM standards.
Enables bubble free curing at normal temperature & humidity levels.
Formulations have excellent adhesion to porous stone and concrete panels.
Excellent adhesion to aluminium with no primers and a wash with green dimethyl carbonate solvent is enough.
Risun 30000D can be used to make a crystal water clear sealant where expensive stone is used.
Sealant formulations can use the cheaper PPC fillers now available to make thick sealant.
Sealants are solvent and isocyanate free and safer for tradesman and DIY consumers.
Sealants can be made in the factory with maximum mixer temperatures of 60 degree C and low energy use.
The trifunctional polymer is catalysed with low levels of tin containing chemical like DOTL or DBTDL.
No hazard warning labels on the sealant product when displayed in retail stores.
If you are interested in our new generation STPP, Please kindly contact us via (+86)13770998448 to Mr. Sean.
Risun 30000D in Construction sealant Starting Formulation