Cross-linkable masses based on organyl-oxysilane-terminated polymers

Patent metadata

Field	Value
Publication number	US-2016160103-A1
Application number	US-201414904876-A
Country	US
Kind code	A1
Filing date	Aug 5, 2014
Priority date	Aug 23, 2013
Publication date	Jun 9, 2016
Grant date	—

Abstract

Moisture curable compositions having a low modulus and a high resilience are prepared by curing a composition containing a first polymer which predominately contains two moisture-curable silyl groups, and a second polymer which is terminated by an alkoxy group and contains but a single moisture-curable silyl group, or a hydroxyl group.

First claim

1 - 11 . (canceled)

12 . A moisture-curable composition comprising:
(A) 100 parts by weight of at least one silane-crosslinking polymer of the formula
(HO) x —Y—[O—CO—NH—(CR 1 2 ) b —SiR a (OR 2 ) 3-a ] 2-x   (I)

where
Y is a divalent polymer radical,
R each, independently, is the same or different and is a monovalent, optionally substituted hydrocarbyl radical,
R 1 each, independently, is the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbyl radical,
R 2 each, independently, is may be the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbyl radical,
x is 0 or 1,
a each, independently, is the same or different and is 0, 1 or 2
and
b each, independently, is the same or different and is an integer from 1 to 10, with the proviso that component (A) includes less than 15 mol % of polymers of the formula (I) with x=1,
and
(B) 5 to 500 parts by weight of at least one silane-crosslinking polymer of the formula
R 6 —O—Z—[O—CO—NH—(CR 4 2 ) d —SiR 3 c (OR 5 ) 3-c ] 1-y [OH] y   (II)

where

Z is a divalent polymer radical having no hydroxyl group,
R 3 each, independently, is the same or different and is a monovalent, optionally substituted hydrocarbyl radical,
R 4 each, independently, is the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbyl radical,
R 5 each, independently, is the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbyl radical,
R 6 each, independently, is monovalent, optionally substituted hydrocarbyl radical,
y is 0 or 1,
c each, independently, is the same or different and is 0, 1 or 2
and
d may be the same or different and is an integer from 1 to 10, with the proviso that component (B) includes less than 15 mol % of polymers of the formula (II) with y=1.

13 . The composition of claim 12 , wherein component (A) includes less than 5 mol % of polymers of the formula (I) with x=1.

14 . The composition of claim 12 , wherein component (B) includes less than 5 mol % of polymers of the formula (II) with y=1.

15 . The composition of any of claim 12 , wherein the composition contains 10 to 100 parts by weight of polymer (B).

16 . The composition of claim 12 , further comprising at least one organosilicon compound (C) not having nitrogen atoms bonded directly to a carbonyl group.

17 . The composition of claim 16 , wherein the organosilicon compounds (C) are compounds containing units of the formula
D e Si(OR 7 ) f R 8 g O (4-e-f-g)/2   (III)

where
R 7 each, independently, is the same or different and is a hydrogen atom or optionally substituted hydrocarbyl radicals,
D each, independently, is the same or different and is monovalent, SiC-bonded radicals not having nitrogen atoms bonded directly to carbonyl groups,
R 8 each, independently, is the same or different and is a monovalent, optionally substituted, SiC-bonded, nitrogen-free organic radical,
e is 0, 1, 2, 3 or 4,
f is 0, 1, 2 or 3 and
g is 0, 1, 2 or 3,
with the proviso that the sum total of e+f+g is less than or equal to 4 and at least one D radical is present per molecule.

18 . The composition of claim 12 , comprising:
(A) 100 parts by weight of polymer(s) (A), (B) 5 to 500 parts of polymer(s) (B), (C) 0.1 to 10 parts by weight of organosilicon compounds not having nitrogen atoms bonded directly to carbonyl groups, (D) 50 to 500 parts by weight of fillers, (E) optionally, silicone resins, (F) optionally, catalysts, (G) optionally, adhesion promoters, (H) optionally, water scavengers, (I) 0.01 to 100 parts by weight of unreactive plasticizers, (J) optionally, further additives and (K) optionally, further admixtures.

19 . A process for producing a composition of claim 12 , comprising mixing the individual components in any sequence.

20 . A shaped body produced by crosslinking a composition of claim 12 .

21 . A shaped body produced by crosslinking a composition, produced by the process of claim 19 .

22 . A method for bonding substrates, comprising applying a composition of claim 12 to a surface of at least one substrate, and then contacting this surface with a second substrate to be bonded, and allowing the composition to crosslink.

23 . A method for bonding substrates, comprising applying a composition prepared by the process of claim 19 .

24 . A method of producing composite material, comprising applying the composition of claim 12 to at least one substrate and allowing the composition to crosslink.

25 . A method of producing composite material, comprising applying the composition prepared by the process of claim 19 .

Assignees

• Wacker Chemie Ag

Inventors

• Stanjek Volker
• Zander Lars

Classifications

• C08G65/336 Primary

  containing silicon · CPC title

• C09J183/14 Primary

  in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms (C09J183/10 takes precedence) · CPC title

• C08G77/54

  Nitrogen-containing linkages · CPC title

• C09J2471/00

  Presence of polyether · CPC title

• C09K3/1018

  Macromolecular compounds having one or more carbon-to-silicon linkages · CPC title