The reaction of the first polyisocyanate composition is quenched with a quenching agent to produce an intermediate composition having an intermediate isocyanate value of from about 21.0 to about 26.0.
The reaction mixture has an isocyanate index from 90 to 150.
The reaction mixture has an isocyanate index from 90 to 150.
The blend of component a and component b has an isocyanate index of from about 1.5 to about 4.0.
The formulation of the adhesive has an isocynanate index in the range of 125 to 500.
This composition may be reacted with a polyisocyanate at an isocyanate index of from about 2.5 to about 4 to form a rigid polyisocyanurate foam.
The polyurethane gel has a viscosity of from about 3,000 to about 12,000 cps at 25°C and includes the reaction product of a polyol component and a second isocyanate component which react at an isocyanate index of from about 10 to about 70.
The mixture ratio is adjusted such that it corresponds to an isocyanate index of 50 to 125, calculated as the sum of hydroxyl and amino groups.
These solid elastomers are produced via the reaction injection molding process in a closed mold, preferably at an isocyanate index of about 70 to about 130.
The preparation method uses phyllosilicates, using polyol, TDI, a monitored isocyanate index and water and dichloromethane as a blowing agent for producing the polymeric matrix.
The isocyanate component includes at least 30 wt% of a biuret modified aromatic diisocyanate, based on a total weight of the isocyanate component, and an isocyanate index of the reaction mixture is less than 100.
The quantitative ratio of polyols to polyisocyanate is selected such that when the polyol component (A) is mixed with the isocyanate component (B), an isocyanate index higher than 110 results.
Preferably, the isocyanate index is between about 1.2 and about 2.0.
The two-component system achieves optimal gel time and cure response for application as an athletic surface having an isocyanate index between about 105 and 115.
The soft polyurethane foam with low resilience has isocyanate index of 75-105, density of 60-160kg/m3, and falling ball resilience of less than 15%.
At least a portion of the flexible polymeric sleeve is a polyurethane elastomer produced in a reaction of an isocyanate- terminated prepolymer and a curing agent at an isocyanate index of 90 to 120.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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