Cross-linkable masses based on organyloxysilane-terminated polymers

Patent metadata

Field	Value
Publication number	US-2017198101-A1
Application number	US-201515314735-A
Country	US
Kind code	A1
Filing date	May 13, 2015
Priority date	May 30, 2014
Publication date	Jul 13, 2017
Grant date	—

Abstract

The objectionable odor of one component condensation curable organopolysiloxane compositions is eliminated by replacing all or the most substantial part of water scavenger vinyltrimethoxysilane with a phenyltrialkoxysilane, without compromising storage or curing properties.

First claim

1 .- 10 . (canceled)

11 . A crosslinkable composition, comprising:
(A) 100 parts by weight of at least one compound of the formula
Y—[(CR 1 2 ) b —SiR a (OR 2 ) 3-a ] x   (I),

where
Y is an x-valent polymeric moiety attached via nitrogen, oxygen, sulfur or carbon,
R at each occurrence are the same or different and are monovalent, optionally substituted hydrocarbyl moieties,
R 1 at each occurrence are the same or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl moiety, which is attached to the carbon atom via nitrogen, phosphorus, oxygen, sulfur or a carbonyl group,
R 2 at each occurrence are the same or different and are hydrogen or a monovalent, optionally substituted hydrocarbyl moiety,
x is an integer from 1 to 10,
a at each occurrence are the same or different and are 0, 1 or 2, and
b at each occurrence are the same or different and are an integer from 1 to 10,
(B) at least 0.2 part by weight of a phenyltrialkoxysilane of the formula
C 6 H 5 —Si(OR 3 ) 3   (II),

where
R 3 at each occurrence are the same or different and are methyl or ethyl,
(C) 0.1 to 30 parts by weight of a nitrogenous organosilicon compound containing a unit of the formula
D e Si(OR 5 ) d R 4 c O (4-e-d-c)/2   (III),

where
R 4 at each occurrence are the same or different and are monovalent, optionally substituted, SiC-bonded organic moieties free of nitrogen,
R 5 at each occurrence are the same or different and are hydrogen or an optionally substituted hydrocarbyl moiety,
D at each occurrence are the same or different and are monovalent SiC-bonded moieties having at least one nitrogen atom not bonded to a carbonyl group (C═O),
c is 0, 1, 2 or 3,
d is 1, 2 or 3, and
e is 0, 1, 2, 3 or 4,
with the proviso that the c+d+e sum is not more than 4 and at least one D moiety is present per molecule,
wherein the crosslinkable composition contains less than 0.5 wt % of vinyltrimethoxysilane, based on the total weight of the crosslinkable composition.

12 . The crosslinkable composition of claim 11 , wherein the Y moiety comprises polyurethane moieties or polyoxyalkylene moieties.

13 . The crosslinkable composition of claim 11 , wherein component (B) is phenyltrimethoxysilane.

14 . The crosslinkable composition of claim 11 , wherein the composition contains less than 0.3 wt % of vinyltrimethoxysilane, based on the total weight of the composition.

15 . The crosslinkable composition of claim 11 , wherein the composition contains component (B) in an amount of 0.5 to 50 parts by weight, based on 100 parts by weight of component (A).

16 . The crosslinkable composition of claim 11 , comprising:
(A) 100 parts by weight of a compound of formula (I), (B) 0.5 to 50 parts by weight of phenyltrimethoxysilane, (C) 0.2 to 25 parts by weight of a nitrogenous organosilicon compound containing a unit of formula (III), (D) optionally a plasticizer, (E) optionally a filler, (F) optionally an adhesion promoter, (G) optionally a phenylsilicone resin, (H) optionally a catalyst, (I) optionally an additive, and (J) optionally an admixture agent,
wherein the composition contains less than 0.3 wt % of vinyltrimethoxysilane, based on the total weight of the composition.

17 . The crosslinkable composition of claim 11 , comprising:
(A) 100 parts by weight of a compound of formula (I), (B) 0.8 to 30 parts by weight of phenyltrimethoxysilane, (C) 0.3 to 20 parts by weight of a nitrogenous organosilicon compound containing a unit of formula (III), (D) optionally a plasticizer, (E) optionally 50 to 500 parts by weight of a filler, (F) optionally an adhesion promoter, (G) optionally a phenylsilicone resin, (H) optionally a catalyst, (I) optionally an additive, and (J) optionally an admixture agent,
wherein the composition contains less than 0.1 wt % of vinyltrimethoxysilane, based on the total weight of the composition.

18 . A method of forming a composition of claim 11 , comprising mixing the individual components in any order.

19 . A shaped article obtained by crosslinking a composition of claim 11 .

20 . A method of forming a composite, comprising applying a composition of claim 11 to a substrate and then crosslinking the composition.

Assignees

• Wacker Chemie Ag

Inventors

• Stanjek Volker
• Bauer Andreas
• Zander Lars

Classifications

• C09D183/12

  containing polyether sequences · CPC title

• C08G77/80

  Siloxanes having aromatic substituents, e.g. phenyl side groups · CPC title

• C08K9/10

  Encapsulated ingredients · CPC title

• C08G77/26 Primary

  nitrogen-containing groups · CPC title

• C08K9/00

  Use of pretreated ingredients · CPC title