C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 175/08 (2006.01) C08G 18/10 (2006.01) C08G 18/48 (2006.01) C08G 18/71 (2006.01) C08J 3/24 (2006.01) C08L 75/04 (2006.01) C09J 7/02 (2006.01) C09J 125/16 (2006.01) C09J 165/00 (2006.01) G09F 3/04 (2006.01)
Patent
CA 2709321
The invention relates to an adhesive composition that can be cross-linked by heating, said composition comprising between 20 and 85 % of a polyurethane comprising 2 terminal groups of the hydrolysable alkoxysilane type of formula (I) : wherein: R1 is a hydrocarbonated radical comprising between 5 and 15 carbon atoms; R2 is an alkylene radical comprising between 1 and 4 carbon atoms; R3 is an akylene radical comprising between 1 and 3 carbon atoms; R4 and R5 are each an alkyl radical comprising between 1 and 4 carbon atoms; n is a whole number such that the average molar mass of the polyether block of formula -[OR2]n- is between 300 Da and 30 kDa; m is a whole number such that the average molar mass of the polymer of formula (I) is between 600 Da and 60 kDa; and p is a whole number equal to 0, 1 or 2. The composition also comprises between 15 and 80 % of a compatible tackifying resin; and between 0.01 and 3 % of a cross-linking catalyst. The invention also relates to a self-adhesive carrier coated with the cross-linked adhesive composition.
Composition adhésive réticulable par chauffage comprenant de 20 à 85 % d'un polyuréthane comprenant 2 groupes terminaux de type alkoxysilane hydrolysables et de formule (I): dans laquelle : R1 est un radical hydrocarboné comprenant de 5 à 15 atomes de carbone; R2 est un radical alkylène de 1 à 4 atomes de carbone; R3 est un radical alkylène de 1 à 3 atomes de carbone; R4 et R5 sont chacun un radical alkyle de 1 à 4 atomes de carbone; n est un nombre entier tel que la masse molaire moyenne en nombre du bloc polyéther de formule -[OR2]n- est comprise entre 300 Da et 30 kDa; m est un nombre entier tel que la masse molaire moyenne en nombre du polymère de formule (I) est comprise entre 600 Da et 60 kDa; p est un nombre entier égal à 0, 1 ou 2; de 15 à 80 % d'une résine tackifiante compatible; et de 0,01 à 3 % d'un catalyseur de réticulation. 2) Support auto-adhésif revêtu de la composition adhésive réticulée.
Goubard David
Poivet Sylwia
Bostik Sa
Robic
LandOfFree
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