Production of an adhesive composition in an extruder
AssigneeBostik SA
InventorsMyriam Grisot-Saule, Sebastien Quinebeche
Life of this patent
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Abstract
The invention concerns a method for preparing an adhesive composition using an extruder having at least two rotating screws, successively comprising: feeding a plasticizer into the extruder; degassing the plasticizer in the extruder; feeding a silylated prepolymer and mixing the latter with the plasticizer in the extruder; and discharging the mixture from the extruder.
Claims20
A method comprising preparing an adhesive composition, using an extruder having at least two rotating screws, by successively:
- feeding at least one plasticizer into the extruder;
- degassing the at least one plasticizer in the extruder, wherein the at least one plasticizer, after being degassed, contains an amount of water by weight lower than that present in the at least one plasticizer before degassing;
- feeding at least one silylated prepolymer and mixing the latter with the at least one plasticizer in the extruder;
- and
- discharging the mixture from the extruder,
- wherein the temperature of the extruder when degassing the at least one plasticizer is 5° C. to 100° C. above the ring-and-ball softening temperature of the at least one plasticizer measured according to standard ISO 4625.
A method comprising preparing an adhesive composition, using an extruder having at least two rotating screws, by successively:
- feeding at least one plasticizer into the extruder;
- degassing the at least one plasticizer in the extruder, wherein the at least one plasticizer, after being degassed, contains an amount of water by weight lower than that present in the at least one plasticizer before degassing, and wherein the at least one plasticizer, before degassing, contains an amount of water by weight higher than or equal to 500 ppm;
- feeding at least one silylated prepolymer and mixing the latter with the at least one plasticizer in the extruder;
- and
- discharging the mixture from the extruder,
- wherein the temperature of the extruder when degassing the at least one plasticizer is 5° C. to 100° C. above the ring-and-ball softening temperature of the at least one plasticizer measured according to standard ISO 4625.
Dependencies are inferred from the claim text.