US 7,022,800 B2Granted

Organosiloxane compositions

AssigneeDow Corning Corporation

InventorsMamoru Tachikawa, Toshio Saruyama, Kazutoshi Okabe, Hiroshi Adachi, Francois De Buyl, Luo Cheng Zhang

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Abstract

A moisture curable composition capable of cure to an elastomeric body, comprising a polymeric material having not less than two hydroxyl or hydrolyzable groups an alkoxysilane curative and a catalyst comprising: a mixture and/or reaction product of a compound (i) M[OR]4 and compound (ii) M[OR′]x[Z]z, wherein M represents a metal having a valency of 4 selected from Group IVB of the Periodic Table, preferably titanium or zirconium. Each R and R′ may be a primary, secondary or tertiary aliphatic hydrocarbon or the group SiR93; and a compound iii) of the general formula A-C(═O)R1—C(═O)—B wherein R1 is a methylene group or a substituted methylene radical, A is selected from —(CX2)nC(R2)3 wherein n is from 0 to 5, and an adamantyl group or a derivative thereof; B is selected from the group of —(CX2)tC(R2)3 wherein t is from 0 to 5; a monovalent alkyl group having from 1 to 6 carbon atoms and; OR3, wherein R3 is selected from the group of —(CX2)tC(R2)3 and a monovalent alkyl group having from 1 to 6 carbon atoms; wherein each X is the same or different and is selected from the group of a halogen radical and hydrogen, each R2 is the same or different and is selected from the group of a halogen radical and an alkyl radical having one to eight carbon atoms, and when n is greater than 0 at least one of X or R2 is a halogen radical

Claims14

Dependent claims

A moisture curable composition capable of cure to an elastomeric body, the composition comprising:

A) a polymeric material having at least two groups, said groups in the polymeric material being the same and selected from the group consisting of
a) hydroxyl groups, and
b) hydrolysable groups;
B) an alkoxysilane curing agent, and
C) a catalyst comprising a material selected from the group consisting of:
(I) a mixture of (i) and (iii),
(II) a mixture of (ii) and (iii),
(III) a reaction product of (i) and (iii),
(IV) a reaction product of (ii) and (iii),
(V) a mixture of (I) and (III), and
(VI) a mixture of (II) and (IV), wherein
(i) is M(OR)4,
(ii) is M(OR′),(Z),
wherein M is a metal having a valency of 4 selected from Group IVB of the Periodic Table, each R and R′ is the same or different and is selected from the group consisting of
(i′) primary aliphatic hydrocarbon groups,
(ii′) secondary aliphatic hydrocarbon groups,
(iii′) tertiary aliphatic hydrocarbon groups, and
(iv′) —SiR9, wherein each R9 is an alkyl group having from 1 to 6 carbon atoms and Z is a group of the formula —O—Y—O— wherein Y is selected from the group consisting of:
(i″) an alkylene group comprising from 1 to 8 carbon atoms and,
(ii″) a branched alkylene radical comprising from 1 to 8 carbon atoms and x is 0 or 2, wherein when x is 0, z is 2 and when x is 2, z is 1;
and,
(iii) a compound having the general formula:
wherein R1 is selected from the group consisting of:
a′) a methylene radical and
b′) substituted methylene radicals having from 1 to 6 carbon atoms, wherein A′ is selected from the group consisting of:
(!) —(CX2)nC(R) wherein n is from 0 to 5,
(!!) an adamantyl group and
(!!!) an adamantyl derivative;
B′ is selected from the group consisting of:
a″) —(CX2(R2)3, wherein t has a value of from 0 to 5,
b″) a monovalent alkyl group having from 1 to 6 carbon atoms, and
c″) OR3, wherein R3 is selected from the group consisting of:
a′″) —(CX2)tC(R2)3 and
b′″) a monovalent alkyl group having from 1 to 6 carbon atoms,
wherein each X is the same or different and is selected from the group consisting of:
a′) a halogen radical and
″) hydrogen, and each R2 is the same or different and is selected from the group consisting of:
b′) a halogen radical and
b″) an alkyl radical having one to eight carbon atoms,
wherein when n is greater than 0, at least one of the X or R2 is a halogen radical.

37 more elements

A catalyst composition for catalyzing a reaction between a polymeric material and an alkoxysilane curing agent, wherein the polymeric material has at least two groups selected from the group consisting of:

a) hydroxyl groups, and
b) hydrolyzable groups, the catalyst comprising a material selected from the group consisting of:
(I) a mixture of (i) and (iii),
(II) a mixture of (ii) and (iii),
(III) a reaction product of (i) and (iii),
(IV) a reaction product of (ii) and (iii),
(V) a mixture of (I) and (III), and
(VI) a mixture of (II) and (IV), wherein
(i) is M(OR)4,
(ii) is M(OR′),(Z),
wherein M is a metal having a valency of 4 selected from Group IVB of the Periodic Table, each R and R′ is the same or different and is selected from the group consisting of
(i′) primary aliphatic hydrocarbon groups,
(ii′) secondary aliphatic hydrocarbon groups,
(iii′) tertiary aliphatic hydrocarbon groups, and
(iv′) —SiR93, wherein each R9 is an alkyl group having from 1 to 6 carbon atoms and Z is a group of the formula —O—Y—O— wherein Y is selected from the group consisting of:
(i″) an alkylene group comprising from 1 to 8 carbon atoms and,
(ii″) a branched alkylene radical comprising from 1 to 8 carbon atoms and x is 0 or 2, wherein when x is 0, z is 2 and when x is 2, z is 1,
and, (iii) is a compound having the general formula:
wherein R1 is selected from the group consisting of:
a′) a methylene radical and
b′) substituted methylene radicals having from 1 to 6 carbon atoms, wherein A′ is selected from the group consisting of:
(!) —(CX2)nC(R2)3 wherein n is from 0 to 5,
(!!) an adamantyl group and
(!!!) an adamantyl derivative;
B′ is selected from the group consisting of:
a″) —(CX2)tC(R2)3, wherein t has a value of from 0 to 5,
b″) a monovalent alkyl group having from 1 to 6 carbon atoms, and
c″) OR3, wherein R3 is selected from the group consisting of:
a′″) —(CX2)C(R2)3 and
b′″) a monovalent alkyl group having from 1 to 6 carbon atoms, wherein each X is the same or different and is selected from the group consisting of:
a′) a halogen radical and
a″) hydrogen,
wherein each R2 is the same or different and is selected from the group consisting of:
b1) a halogen radical and
b″) an alkyl radical having one to eight carbon atoms, wherein when n is greater than 0, at least one of the X or R2 is a halogen radical combined with a material selected from the group consisting of:
h′) an alkoxy silane, and
h″) a tertiary amyl alcohol.

34 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/169,647Filed 4 Jan 2001
Priority: JP 2000-0057836 Jan 2000
Published: US 2004/0214965 A128 Oct 2004
Granted: 4 Apr 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

C08L 83/04
Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with…
C08K 5/0091
Use of organic ingredients: complexes with metal-heteroatom-bonds
C08G 77/16
Containing silicon bound to oxygen-containing groups: to hydroxy groups
C08G 77/18
Containing silicon bound to oxygen-containing groups: to alkoxy or aryloxy groups