Patent Application

App. No. 14/369,424

Abstract

Claims (55)

1 . A composition for forming a cured polymer composition comprising:

(A) a polymer having at least a reactive silylgroup;

(B) a crosslinker or chain extender chosen from an alkoxysilane, an alkoxysiloxane, an oximosilane, an oximosiloxane, an enoxysilane, an enoxysiloxane, an aminosilane, a carboxysilane, a carboxysiloxane, an alkylamidosilane, an alkylamidosiloxane, an arylamidosilane, an arylamidosiloxane, an alkoxyaminosilane, an alkaryaminosiloxane, an alkoxycarbamatosilane, an alkoxycarbamatosiloxane, and combinations of two or more thereof;

(C) a catalyst chosen from an organometalic compound or salt of zinc(II), zirconium (IV), or a combination of two or more thereof;

(D) at least one adhesion promoter chosen from a silane or siloxane other than the compounds listed under (B);

(E) optionally, a filler component; and

(F) optionally, at least one acidic compound chosen from a phosphate ester, a phosphonate, a phosphite, a phosphine, a sulfite, a pseudohalogenide, a branched alkyl carboxylic acid, and a combination of two or more thereof.

2 . The composition of claim 1 , wherein the metal catalyst component (C) comprises a Zn(II) complex of the formula (1):

Zn II Y 3-c A c   (1),

a Zr(IV) complex of the formula (2):

Zr IV Y 4-h A h   (2),

or a combination of two or more thereof, wherein Y is a chelating ligand chosen from a diketonate, a diamine, a triamine, an aminoacetate, a nitriloacetate, a bipyridin, a glyoxime, or a combination of two or more thereof; and A is an anion chosen from substituted, unsubstituted alkyl- and aryl carboxylates, c is a number between 0 to 2 or an integer, and h is a number between 0 to 4 or an integer.

3 . The composition of claim 2 , wherein the chelating agent Y comprises a substituted diketonate, the carboxylate anion A is chosen from pentanoate, hexanoate, heptanoate, octoate, neodecanoate, 2-ethylhexanoate, or a combination of two or more thereof.

4 . The composition of claim 2 , wherein catalyst (C) comprises a blend of a Zn(II) complex and a Zr(IV) complex or a blend of two Zn(II) complexes or a blend of two Zr(IV) complexes.

5 . The composition of claim 4 , wherein the catalyst (C) comprises a composition comprising from about 1 to about 99 wt. % of zinc and from about 1 to about 99 wt. % of zirconium.

6 . The composition of claim 4 , wherein the catalyst (C) comprises a composition comprising from about 10 to about 80 wt. % of zinc and from about 10 to about 80 wt. % of zirconium.

7 . The composition of claim 4 , wherein the catalyst (C) comprises a composition comprising from about 30 to about 70 wt. % of zinc and from about 30 to about 70 wt. % of zirconium.

8 . The composition of claim 2 , wherein catalyst (C) comprises a complex Zr IV Y 4-g A g and whereby g=4 and the anion A is a branched C 4 -C 30 alkyl carboxylate.

9 . The composition of claim 1 comprising from about 0.01 to about 7 parts per weight of catalyst (C) per 100 parts per weight of the polymer A.

10 . The composition of claim 1 , comprising component (C) in an amount of about 0.05 to about 5 parts per weight per 100 parts per weight of the polymer (A).

11 . The composition of claim 1 , comprising component (C) in an amount of about 0.01 to about 1.0 parts per weight per 100 parts per weight of the polymer (A).

12 . The composition of claim 1 , comprising component (C) in an amount of about 0.02 to about 0.4 parts per weight per 100 parts per weight of the polymer (A).

13 . The composition of claim 1 , wherein the acidic component (F) is added in a molar ratio of (F):(C) of 1:10 to 1:4.

14 . The composition of claim 1 , wherein the component (F) is chosen from a mono ester of a phosphate; a phosphonate of the formula (R 3 O)PO(OH) 2 , (R 3 O)P(OH) 2 , or R 3 P(O)(OH) 2 where R 3 is a C 1 -C 18 -alkyl, a C 2 -C 20 -alkoxyalkyl, phenyl, a C 7 -C 12 -alkylaryl, a poly(C 2 -C 4 -alkylene)oxide ester or its mixtures with diesters; a branched alkyl C 4 -C 30 -alkyl carboxylic acid; or a combination of two or more thereof.

15 . The polymer composition of claim 1 , wherein the polymer (A) has the formula (2)

[R 1 a R 2 3-a Si—Z—] n —X—Z—SiR 1 a R 2 3-a   (2)

where X is chosen from a polyurethane; a polyester; a polyether; a polycarbonate; a polyolefin; a polypropylene; a polyesterether; and a polyorganosiloxane having units of R 3 SiO 1/2 , R 2 SiO, RSiO 3/2 , and/or SiO 4/2 ,

n is 0 to 100,

a is 0 to 2,

R and R 1 can be identical or different at the same Si-atom and chosen from a C 1 -C 10 -alkyl; a C 1 -C 10 alkyl substituted with one or more of Cl, F, N, O or S; a phenyl; a C 7 -C 16 alkylaryl; a C 7 -C 16 arylalkyl; a C 2 -C 4 polyalkylene ether; or a combination of two or more thereof.

R 2 is chosen from OH, a C 1 -C 8 -alkoxy, a C 2 -C 18 -alkoxyalkyl, an oximoalkyl, an enoxyalkyl, an aminoalkyl, a carboxyalkyl, an amidoalkyl, an amidoaryl, a carbamatoalkyl, or a combination of two or more thereof, and

Z is a bond, a divalent unit selected from the group of a C 1 -C 8 alkylene, or O.

16 . The composition of claim 1 , wherein the crosslinker component (B) is chosen from tetraethylorthosilicate (TEOS), a polycondensate of TEOS; methyltrimethoxysilane (MTMS); vinyl-trimethoxysilane; methylvinyldimethoxysilane; dimethyldiethoxysilane; vinyltriethoxysilane; tetra-n-propylorthosilicate; vinyltris(methylethylketoxime)silane; methyltris(methylethylketoxime)silane; trisacetamidomethylsilane; bisacetamidodimethylsilane; tris(N-methyl-acetamido)methylsilane; bis(N-methylacetamido) dimethylsilane; (N-methyl-acetamido)methyldialkoxysilane; trisbenzamidomethylsilane; trispropenoxymethylsilane; alkyldialkoxyamidosilanes; alkylalkoxybisamidosilanes; CH 3 Si(OC 2 H 5 ) 1-2 (NHCOR) 2-1 ; (CH 3 Si(OC 2 H 5 )(NCH 3 COC 6 H 5 ) 2 ; CH 3 Si(OC 2 H 5 )—(NHCOC 6 H 5 ) 2 ; methyldimethoxy(ethylmethylketoximo)silane; methylmethoxybis-(ethylmethylketoximo)silane; methyldimethoxy(acetaldoximo)silane; methyldimethoxy(N-methylcarbamato)silane; ethyldimethoxy(N-methylcarbamato)silane; methyldimethoxyisopropenoxysilane; trimethoxyisopropenoxysilane; methyltri-iso-propenoxysilane; methyldimethoxy(but-2-ene-2-oxy)silane; methyldimethoxy(1-phenylethenoxy)silane; methyldimethoxy-2(1-carboethoxypropenoxy)silane; methylmethoxydi-N-methylaminosilane; vinyldimethoxymethylaminosilane; tetra-N,N-diethylaminosilane; methyldimethoxymethylaminosilane; methyltricyclohexylaminosilane; methyldimethoxyethylaminosilane; dimethyldi-N,N-dimethylaminosilane; methyldimethoxyisopropylaminosilane; dimethyldi-N,N-diethylaminosilane; ethyldimethoxy(N-ethylpropionamido)silane; methyldimethoxy(N-methylacetamido)silane; methyltris(N-methylacetamido)silane; ethyldimethoxy(N-methylacetamido)silane; methyltris(N-methylbenzamido)silane; methylmethoxybis(N-methylacetamido)silane; methyldimethoxy(caprolactamo)silane; trimethoxy(N-methylacetamido)silane; methyldimethoxyethylacetimidatosilane; methyldimethoxypropylacetimidatosilane; methyldimethoxy(N,N′,N′-trimethylureido)silane; methyldimethoxy(N-allyl-N′,N′-dimethylureido)silane; methyldimethoxy(N-phenyl-N′,N′-dimethylureido)silane; methyldimethoxyisocyanatosilane; dimethoxydiisocyanatosilane; methyldimethoxythioisocyanatosilane; methylmethoxydithioisocyanatosilane, or a combination of two or more thereof.

17 . The composition of claim 1 , wherein the adhesion promoter component (D) is chosen from an aminoalkyltrialkoxysilane, an aminoalkylalkyldialkoxysilane, a bis(alkyltrialkoxysilyl)amine, a tris(alkyltrialkoxysilyl)amine, a tris(alkyltrialkoxysilyl)cyanuarate, and a tris(alkyltrialkoxysilyl)isocyanuarate, or a combination of two or more thereof.

18 . The polymer composition of claim 1 wherein the polymer component (A) has the formula (4):

R 2 3-a R 1 a Si—Z—[R 2 SiO] x [R 1 2 SiO] y —Z—SiR 1 a R 2 3-a   (4)

whereby

x is 0 to 10000;

y is 0 to 1000;

a is 0 to 2;

R is methyl;

R 1 is chosen from a C 1 -C 10 -alkyl; a C 1 -C 10 alkyl substituted with one or more of Cl, F, N, O or S; a phenyl; a C 7 -C 16 alkylaryl; a C 7 -C 16 arylalkyl; a C 2 -C 4 polyalkylene ether; or a combination of two or more thereof, and other siloxane units may be present in amounts less than 10 mol. %;

R 2 is chosen from OH, a C 1 -C 8 -alkoxy, a C 2 -C 18 -alkoxyalkyl, an oximoalkyl, an enoxyalkyl, an aminoalkyl, a carboxyalkyl, an amidoalkyl, an amidoaryl, a carbamatoalkyl, or a combination of two or more thereof, and

Z is —O—, bond, or —C 2 H 4 —.

19 . The composition of claim 1 , further comprising a solvent chosen from an alkylbenzene, a trialkyphosphate, a triarylphosphate, a phthalic acid ester, an arylsulfonic acid ester having a viscosity-density constant (VDC) of at least 0.86 that is miscible with a polyorganosiloxanes and catalyst component (C), a polyorganosiloxane devoid of reactive groups and having a viscosity of less than 2000 mPa·s at 25° C., or a combination of two or more thereof.

20 . The composition of claim 1 comprising:

100 pt. wt of component (A),

0.1 to about 10 pt. wt of at least one crosslinker (B),

0.01 to about 7 pt. wt. of a catalyst (C),

0.1 to about 5 pt. wt. of an adhesion promoter (D),

0 to about 300 pt. wt of component (E),

0.01 to about 8 pt. wt. of component (F),

whereby this composition can be stored in the absence of humidity and is curable in the presence of humidity upon exposure to ambient air.

21 . A cured polymer formed from the composition of claim 1 .

22 . The cured polymer of claim 21 in the form of an elastomeric, seal, duromeric seal, an adhesive, a coating including anti-fouling coating, an encapsulant, a shaped article, a mold, or an impression material.

Assignments (9)