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1. (WO2019027897) MOISTURE CURABLE COMPOSITIONS
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CLAIMS

What is claimed is:

1 . A two-part moisture curing silicone composition having:

a base component; and

a catalyst package component;

wherein the catalyst package component comprises:

(i) a polydialkylsiloxane having the general formula:

R33 -Si-0-((R2)2SiO)d -Si-R33 (2)

where each R2 is an alkyl group or a phenyl group, each R3 may be the same or different and is selected from R2, alkyl, phenyl, alkenyl or alkynyl groups having a viscosity of from about 5 to about 100,000 mPa-s at 25°C;

(ii) one or more dipodal silanes in accordance with the formula:

(RO)m(Y1 )3-m -Si(CH2)x -((NHCH2CH2), -Q(CH2)x)n -Si(OR4)m(Y1 )3-m

where each R4 is a C1-10 alkyl group, each Y1 is an alkyl group containing from 1 to 8 carbons, Q is a chemical group containing a heteroatom with a lone pair of electrons, each x is an integer of from 1 to 6, t is 0 or 1 , each m is independently 1 , 2 or 3, and n is 0 or 1 ;

(iii) a cross-linker; and

(iv) a tin based catalyst.

2. The two-part moisture curing silicone composition in accordance with claim 1 , wherein the base component comprises:

(a) a siloxane polymer having at least two terminal hydroxyl or hydrolysable groups having a viscosity of from about 1 ,500 to about 150,000 mPa-s at 25°C;

(b) one or more reinforcing fillers; and optionally

(c) one or more non-reinforcing fillers.

3. A two-part moisture curing silicone composition having:

a base component; and

a catalyst package component;

wherein the base component comprises:

(a) a siloxane polymer having at least two terminal hydroxyl or hydrolysable groups having a viscosity of from about 1 ,500 to about 150,000 mPa-s at 25°C;

(b) one or more reinforcing fillers; and optionally

(c) one or more non-reinforcing fillers; and

wherein the catalyst package comprises:

(i) a polydialkylsiloxane which is unreactive with the siloxane polymer (a) of the base component, and having the general formula:

R33 -Si-0-((R2)2SiO)d -Si-R33 (2)

where each R2 is an alkyl group or a phenyl group, each R3 may be the same or different and is selected from alkyl, phenyl, alkenyl or alkynyl groups having a viscosity of from about 5 to about 100,000 mPa-s at 25°C;

(ii) one or more dipodal silanes in accordance with the formula:

(RO)m(Y1)3-m -Si (CH2)x -((NHCH2CH2), -Q(CH2)x)n -Si(OR4)m(Y1)3-m

where each R4 is a C1-10 alkyl group, each Y1 is an alkyl group containing from 1 to 8 carbons, Q is a chemical group containing a heteroatom with a lone pair of electrons, each x is an integer of from 1 to 6, t is 0 or 1 , each m is independently 1 , 2 or 3, and n is 0 or 1 ;

(iii) a cross-linker; and

(iv) a tin based catalyst.

4. The two-part moisture curing composition in accordance with any preceding claim, wherein the dipodal silanes (ii) are selected from the group consisting of

bis (trimethoxysilyl)hexane, 1 ,2-bis (triethoxysilyl)ethane, bis (alkoxysilylalkyl)amines, bis (dialkoxyalkylsilylalkyl)amine, bis (trialkoxysilylalkyl) N-alkylamine,

bis (dialkoxyalkylsilylalkyl) N-alkylamine, bis (trialkoxysilylalkyl)urea,

bis (dialkoxyalkylsilylalkyl)urea, and combinations thereof.

5. The two-part moisture curing composition in accordance with any preceding claim, wherein the dipodal silanes (ii) are selected from the group consisting of

bis (3-trimethoxysilylpropyl)amine, bis (3-triethoxysilylpropyl)amine,

bis (4-trimethoxysilylbutyl)amine, bis (4-triethoxysilylbutyl)amine,

bis (3-trimethoxysilylpropyl) N-methylamine, bis (3-triethoxysilylpropyl) N-methylamine, bis (4-trimethoxysilylbutyl) N-methylamine, bis (4-triethoxysilylbutyl) N-methylamine, bis (3-trimethoxysilylpropyl)urea, bis (3-triethoxysilylpropyl)urea,

bis (4-trimethoxysilylbutyl)urea, bis (4-triethoxysilylbutyl)urea,

bis (3-dimethoxymethylsilylpropyl)amine, bis (3-diethoxymethyl silylpropyl)amine,

bis (4-dimethoxymethylsilylbutyl)amine, bis (4-diethoxymethyl silylbutyl)amine,

bis (3-dimethoxymethylsilylpropyl) N-methylamine,

bis (3-diethoxymethyl silylpropyl) N-methylamine,

bis (4-dimethoxymethylsilylbutyl) N-methylamine,

bis (4-diethoxymethyl silylbutyl) N-methylamine,

bis (3-dimethoxymethylsilylpropyl)urea, bis (3-diethoxymethyl silylpropyl)urea,

bis (4-dimethoxymethylsilylbutyl)urea,

bis (4-diethoxymethyl silylbutyl)urea, bis (3-dimethoxyethylsilylpropyl)amine, bis (3-diethoxyethyl silylpropyl)amine, bis (4-dimethoxyethylsilylbutyl)amine,

bis (4-diethoxyethyl silylbutyl)amine, bis (3-dimet oxyet ylsilylpropyl) N-methylamine, bis (3-diethoxyethyl silylpropyl) N-methylamine,

bis (4-dimethoxyethylsilylbutyl) N-methylamine,

bis (4-diethoxyethyl silylbutyl) N-methylamine, bis (3-dimethoxyethylsilylpropyl)urea, bis (3-diethoxyethyl silylpropyl)urea, bis (4-dimethoxyethylsilylbutyl)urea,

bis (4-diethoxyethyl silylbutyl)urea, and combinations thereof.

6. The two-part moisture curing composition in accordance with any preceding claim, wherein the dipodal silanes (ii) have the general structure

(RO)3 -Si(CH2)x -(NHCH2CH2)t -NH(CH2)x -Si(OR4)3

where each R4 is a C1-10 alkyl group, each x is an integer of from 1 to 6, and t is 0 or 1 .

7. The two-part moisture curing composition in accordance with claim 5, wherein the dipodal silanes (ii) are selected from the group consisting of

bis (3-tripropyloxysilypropyl)amine, bis (3-methyldiethoxysilypropyl)amine,

bis (3-methyldimethoxysilypropyl)amine, bis (3-triethoxysilylpropyl)amine,

bis (3-trimethoxysilylpropyl)amine, Ν,Ν'-bis [(3-trimethoxysilyl)propyl]ethylenediamine, and combinations thereof.

8. The two-part moisture curing composition in accordance with any preceding claim, wherein ingredients (i), (ii), (iii), and (iv) of the catalyst package are substantially or completely miscible.

9. The two-part moisture curing composition in accordance with any preceding claim, wherein the siloxane polymer (a) is present in the composition in an amount of from about 10 to about 70 weight % based on the total weight of the base component.

10. The two-part moisture curing composition in accordance with any preceding claim, wherein the reinforcing filler (b) is selected from the group consisting of fumed silica, precipitated silicas, precipitated calcium carbonate, and combinations thereof.

1 1 . The two-part moisture curing composition in accordance with any preceding claim, wherein the weight ratio of the base component : catalyst package, when to be mixed, is between about 15:1 and about 1 :1 .

12. The two-part moisture curing composition in accordance with any preceding claim, wherein the base component comprises:

20 to 80 weight % of siloxane polymer (a);

20 to 70 weight % reinforcing fillers (b); and

0 to 20 weight % of non-reinforcing fillers (c);

with the total weight % of the base component being 100 weight %.

13. The two-part moisture curing composition in accordance with any preceding claim, wherein the catalyst package comprises:

30 to 80 weight % of polydialkylsiloxane (i), which is unreactive with polymer (a);

5 to 50 weight % of dipodal silanes (ii);

1 to 30 weight % of cross-linker (iii); and

0 to 3 weight % of tin based catalyst (iv); optionally

0 to 30% colored filler and/or pigment; and optionally

0 to 20 weight % reinforcing filler;

with the total weight % of the catalyst package being 100 weight %.

14. A one-part moisture curing composition comprising a mixture of the base component and the catalyst package in accordance with any preceding claim.

15. Use of the two-part moisture curing composition in accordance with any one of claims 1 to 13, as or for coating, caulking, mold making, and encapsulating materials.

16. Use in accordance with claim 15, in construction and/or structural glazing and/or insulating glazing applications and/or building fagade element and/or a gas filled insulation construction panel, solar applications, automotive applications, electronics applications and industrial assembly and maintenance applications.