US 12,018,122 B2
Method for producing silane-modified polymers
Stefan Huber, Langenthal (CH); Thomas Zuber, Niederhünigen (CH); Fritz Burkhardt, Oberburg (CH); and Claude Lerf, Meyriez (CH)
Assigned to MERZ+BENTELI AG, Niederwangen (CH)
Appl. No. 17/292,139
Filed by MERZ+BENTELI AG, Niederwangen (CH)
PCT Filed Nov. 6, 2019, PCT No. PCT/EP2019/080326
§ 371(c)(1), (2) Date May 7, 2021,
PCT Pub. No. WO2020/094685, PCT Pub. Date May 14, 2020.
Claims priority of application No. 18204858 (EP), filed on Nov. 7, 2018.
Prior Publication US 2021/0395450 A1, Dec. 23, 2021
Int. Cl. C08G 65/336 (2006.01); C08G 63/91 (2006.01)
CPC C08G 65/336 (2013.01) [C08G 63/916 (2013.01)] 13 Claims
 
1. A method for producing an alkoxysilane polymer via a carbamate-, thiocarbonate- or carbonate-terminated prepolymer (IIIa) or (IIIb), wherein the production of the carbamate-, thiocarbonate- or carbonate-terminated prepolymer comprises a reaction of a polymer backbone of formula (I), terminated with at least two amino, mercapto or hydroxyl groups, with a chloroformate of formula (IIa) or a pyrocarbonate of formula (IIb)

OG Complex Work Unit Chemistry
wherein
R1 and R3 are a linear or branched, saturated or unsaturated alkyl or alkenyl group having 1 to 10 carbon atoms or a mono- or polycyclic aliphatic or aromatic ring system having 5 to 18 carbon atoms in the ring system, which is optionally substituted by one or more radicals R2, wherein R2 is selected from the group consisting of a linear or branched, saturated or unsaturated alkyl or alkenyl group having 1 to 10 carbon atoms, a nitro group, a carboxylic ester group, a carboxylic acid group, a sulfone group and a halogen group
X is oxygen, nitrogen, or sulphur
y is 1 when X is oxygen or sulphur and 1 or 2 when X is nitrogen,
n is 0 in the case of a linear or branched, saturated or unsaturated alkyl or alkenyl group
and
is 0, 1 or 2 in the case of a mono- or polycyclic aliphatic or aromatic ring system and
A is a polymer backbone.