Method for the production of organopolysiloxane copolymers and use thereof
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Abstract
A method for the solvent-free, continuous production of organopolysiloxane/polyurea/polyurethane block copolymers involves reacting amino-functional siloxanes with polyisocyanates and organic polyhydroxy compounds. The organopolysiloxane/polyurea/polyurethane block copolymers produced by means of the inventive method are useful for numerous purposes, for example as elastomers, caulks, sealants, and films.
34 Citations
29 Claims
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1-14. -14. (canceled)
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15. A process for the substantially solvent free production of an organopolysiloxane/polyurea/polyurethane block copolymer (A) comprising units of the formula (1):
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—
[[—
NR′
—
X—
SiR2—
[—
O—
SiR2—
]n—
X—
NR′
—
CO—
NH—
Y—
NH—
CO—
]a—
—
[—
O-D-O—
CO—
NH—
Y—
NH—
CO—
]b—
[—
NR-D′
-NR—
CO—
NH—
Y—
NH—
CO—
]b—
—
[—
NR′
—
X—
SiR2—
[—
O—
SiR2—
]n—
X—
NR′
—
CO—
NH—
Y—
NH—
CO—
NH—
Y—
NH—
CO—
]c]d—comprising reacting an aminoalkylpolydiorganosiloxane of the formula (2);
HR′
N—
X—
[SiR2O]nSiR2—
X—
NR′
Hwith diisocyanate of the formula (3);
OCN—
Y—
NCObishydroxy compounds of the formula (4);
HO-D-OHand optionally, small amounts of diamino compounds of the formula (5);
HRN-D′
-NHR,where R is a monovalent hydrocarbon radical having 1 to 20 carbon atoms which is unsubstituted or substituted by fluorine or chlorine, X is an alkylene radical having 1 to 20 carbon atoms, in which nonadjacent methylene units are optionally replaced by —
O—
groups,R′
is hydrogen or an alkyl radical having 1 to 10 carbon atoms,Y is a divalent hydrocarbon radical having 1 to 20 carbon atoms which is unsubstituted or substituted by fluorine or chlorine, D is an alkylene radical having 1 to 700 carbon atoms which is unsubstituted or substituted by fluorine, chlorine, C1-C6 alkyl or C1-C6 alkyl esters and in which nonadjacent methylene units are optionally replaced by —
O—
, —
COO—
, —
OCO—
or —
OCOO—
groups,D′
is an alkylene radical having 1 to 700 carbon atoms which is unsubstituted or substituted by fluorine, chlorine, C1-C6 alkyl or C1-C6 alkyl esters and in which nonadjacent methylene units are optionally replaced by —
O—
, —
COO—
, —
OCO—
or —
OCOO—
groups,n is a number from 1 to 4000, a is a number which is at least 1, b is a number greater than 1, b′
is a number from 0 to 40,c is a number from 0 to 30, and d is a number greater than 0. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification