A blocked mercaptosilane condensate comprising at least one component whose chemical structure is represented by Formula 1:
- (W1)l(W2)m(W3)y(W4)u(W5)v(W6)w Formula 1
- wherein:
- l and at least one subscript selected from the group consisting of m, y, u, v, and w is an integer from 1 to 10,000;
- W1 is a hydrolyzable blocked mercaptosilane fragment derived from a hydrolyzable blocked mercaptosilane by replacement of at least one hydrolyzable group with one end of a siloxane oxygen (—O—) group that is represented by either Formula 2 or Formula 3:
- {[(ROC(═O)—)p(G-)j]kY—S—}rG(—SiX3)s Formula 2:
- {(X3Si—)qG}a{Y(—S-G-SiX3)b}c;
- Formula 3:
- W2 is a hydrolyzable mercaptosilane fragment derived from a hydrolyzable mercaptosilane by replacement of at least one hydrolyzable group with one end of a siloxane oxygen (—O—) group that is represented by Formula 4:
- {[(ROC(═O)—)p(G-)j]kY—S—}r-dG(—SH)d(—SiX3)s;
- Formula 4:
- W3 is a hydrolyzable polysulfide silane fragment derived from a polysulfide silane by replacement of at least one hydrolyzable group with one end of a siloxane oxygen (—O—) group that is represented by Formula 5:
- X1X2X3Si-G1-Sx-G1-SiX1X2X3;
- Formula 5:
- W4 is a hydrolyzable alkyl silane fragment derived from a hydrolyzable alkyl silane by replacement of at least one hydrolyzable group with one end of a siloxane oxygen (—O—) group that can be represented by Formula 6:
- Y1Y2Y3Si-R2;
- Formula 6:
- W5 is a hydrolyzable bis silyl alkane fragment derived from a hydrolyzable bis silyl alkane by replacement of at least one hydrolyzable group with one end of a siloxane oxygen (—O—) group that is represented by Formula 7:
- Z1Z2Z3Si-J-SiZ1Z2Z3;
- Formula 7:
- W6 is a hydrolyzable tris silyl alkane fragment derived from a hydrolyzable tris silyl alkane by replacement of at least one hydrolyzable group with one end of a siloxane oxygen (—O—) group that is represented by either Formula 8 or Formula 9:
- (Z1Z2Z3Si—CH2CH2—)3C6H9 Formula 8:
- (Z1Z2Z3Si—CH2CH2CH2—)3N3C3O3;
- Formula 9:
- wherein, in the preceding Formulae 2 through 9:
- Y is a polyvalent species (Q)zA(=E);
- A is selected from the group consisting of carbon, sulfur, phosphorus, and sulfonyl;
- E is selected from the group consisting of oxygen, sulfur, and NR;
- each G is independently selected from the group consisting of monovalent and polyvalent moieties derived by substitution of alkyl, alkenyl, aryl, or aralkyl moieties, wherein G comprises from 1 to 18 carbon atoms;
- provided that G is not such that the silane would contain an, alpha, beta-unsaturated carbonyl including a carbon-carbon double bond next to the thiocarbonyl group, and provided that, if G is univalent, i.e., if p is 0, G can be hydrogen;
- in each case, the atom A attached to the unsaturated heteroatom E is attached to the sulfur, which in turn is linked via a group G to the silicon atom;
- Q is selected from the group consisting of oxygen, sulfur, and (—NR—);
- each R is independently selected from the group consisting of hydrogen;
- straight, cyclic, or branched alkyl that may or may not contain unsaturation;
- alkenyl groups;
- aryl groups;
- and aralkyl groups, wherein each R, other than where R is hydrogen, comprises from 1 to 18 carbon atoms;
- each X is independently selected from the group consisting of —Cl, —Br, RO—, RC(═O)O—, R2C═NO—, R2NO—, R2N—, —R, —(OSiR2)t(OSiR3), and (—O—)0.5 wherein each R is as above and at least one X is not —R;
- R1, R2, and R3 are independently selected from the group consisting of hydrocarbon fragments obtained by removal of one hydrogen atom from a hydrocarbon having from 1 to 20 carbon atoms including aryl groups and any branched or straight chain alkyl, alkenyl, arenyl, or aralkyl groups;
- each J, and G1 are independently selected from the group consisting of hydrocarbon fragments obtained by removal of two hydrogen atom from a hydrocarbon having from 1 to 20 carbon atoms including arylene groups and any branched or straight chain alkylene, alkenylene, arenylene, or aralkylene groups;
- each X1 is a hydrolyzable moiety independently selected from the group consisting of —Cl, —Br, —OH, —OR1, R1C(═O)O—, —O—N═CR12, and (—O—)0.5;
- each X2 and X3 is independently selected from the group consisting of hydrogen, the members listed above for R1, and the members listed above for X1;
- at least one occurrence of X1, X2, and X3 is (—O—)0.5;
- Y1 is a moiety selected from hydrolyzable groups consisting of —Cl, —Br, —OH, —OR, R2C(═O)O—, —O—N═CR22, and (—O—)0.5;
- Y2 and Y3 are independently selected from the group consisting of hydrogen, the members listed above for R2, and the members listed above for Y1;
- and
- at least one occurrence of Y1, Y2, and Y3 is (—O—)0.5;
- Z1 is selected from the hydrolyzable groups consisting of —Cl, —Br, —OH, —OR3, R3C(═O)O—, —O—N═CR32, and (—O—)0.5;
- Z2 and Z3 are independently selected from the group consisting of hydrogen, the members listed above for R3, and the members listed above for Z1;
- at least one occurrence of Z1, Z2, and Z3 in Formula 7 is (—O—)0.5;
- C6H9 in Formula 8 represents any cyclohexane fragment obtainable by removal of three hydrogen atoms from a cyclohexane molecule;
- N3C3O3 in Formula 9 represents N,N′,N″-trisubstituted cyanurate;
- a is 0 to 7;
- b is 1 to 3;
- c is 1 to 6;
- d is 1 to r;
- j is 0 or 1, but it may be 0 if, and only if, p is 1;
- k is 1 to 2;
- p is 0 to 5;
- q is 0 to 6;
- r is 1 to 3;
- s is 1 to 3;
- t is 0 to 5;
- x is 2 to 20;
- z is 0 to 2;
- provided that:
- (a) if A is carbon, sulfur, or sulfonyl, then
- (i) a+b is 2, and
- (ii) k is 1;
- (b) if A is phosphorus, then a+b is 3 unless both
- (i) c is greater than 1, and
- (ii) b is 1,
- in which case a is c+1;
- and
- c) if A is phosphorus, then k is 2.