US 12,296,522 B2
Production of an adhesive composition in an extruder
Myriam Grisot-Saule, Compiegne (FR); and Sebastien Quinebeche, Bernay (FR)
Assigned to BOSTIK SA, La Plaine Saint Denis (FR)
Appl. No. 16/628,368
Filed by BOSTIK SA, La Plaine Saint Denis (FR)
PCT Filed Jul. 2, 2018, PCT No. PCT/FR2018/051633
§ 371(c)(1), (2) Date Jan. 3, 2020,
PCT Pub. No. WO2019/008258, PCT Pub. Date Jan. 10, 2019.
Claims priority of application No. 1756297 (FR), filed on Jul. 4, 2017.
Prior Publication US 2020/0180202 A1, Jun. 11, 2020
Int. Cl. B29C 48/40 (2019.01); B29B 7/60 (2006.01); B29C 48/405 (2019.01); B29C 48/505 (2019.01); B29K 75/00 (2006.01); C09J 175/04 (2006.01); B29K 501/00 (2006.01)
CPC B29C 48/402 (2019.02) [B29B 7/60 (2013.01); B29C 48/405 (2019.02); B29C 48/505 (2019.02); C09J 175/04 (2013.01); B29K 2075/00 (2013.01); B29K 2501/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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.