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US 7,009,022 B2Granted
Moisture curable high strength, flexible RTV organic copolymer compositions and methods of preparation
AssigneeHenkel Corporation
InventorsDebora E. Duch, Steven T. Nakos, Thomas Fay-Oy Lim
Life of this patent
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Abstract
Flexible, moisture curing ABA triblock copolymers are prepared from poly(alkylene oxide) diols as the B segment and polyester diols as the A block. This backbone is end-capped with siloxy end groups to obtain RTV moisture curing triblocks having high strength and flexibility.
Claims19
A moisture curable composition comprising a polymer having the formula:
- wherein ABA is a polyester/polyether/polyester triblock copolymer, wherein the polyester (A) blocks comprise a poly(diethylene glycol o-phthalate) block;
- R is C1-6 alkyl group or C6 aryl group, which may optionally be substituted by halo;
- R1 is C1-6 alkyl group;
- m is 0–2;
- X is independently at each occurrence a urethane linkage
- or a urea linkage
- wherein R3 is alkylene;
- R4 is alkyl, alkaryl or aryalkyl;
- and
- p is 0 or 1.
7 more elements
A moisture curable composition comprising:
- (a) a polymer having the formula:
- wherein ABA is a polyester/polyether/polyester triblock copolymer;
- R is C1-6 alkyl group or C6 aryl group, which may optionally be substituted by halo;
- R1 is C1-6 alkyl group;
- m is 0–2;
- X is independently at each occurrence a urethane linkage
- or a urea linkage
- wherein R3 is alkylene;
- R4 is alkyl, aryl, alkaryl or aryalkyl;
- and p1 is 0 or 1;
- and
- (b) a moisture cure catalyst wherein the moisture curing catalyst is selected from the group consisting of 1,8-diazabicyclo[5.4.0] undec-7-ene, dimethylaminopyridine and combinations thereof.
9 more elements
A method of preparing a moisture curing composition comprising the steps of:
- (a) reacting a NCO capped polyether with a polyester diol having each of two ends terminated with a hydroxy group, wherein the molar ratio of NCO capped polyester prepolymer to polyester diol being equal to or less than 1:2 to form a block copolymer represented by the structure:
- HO-A-B-A-OH II
- wherein B is a polyether block and A is a polyester block;
- and
- (b)(i) further reacting the structure formed in step (a) with a molar excess of an isocyanatoalkyl polyalkoxysilane to form a moisture curable composition;
- or
- (b)(ii) further reacting the hydroxy terminated polyester/polyether/polyester triblock copolymer (II) with a diisocyanate to provide NCO capping at each end of the triblock copolymer;
- and further reacting the product of this reaction with an aminoalkylenepolyalkoxysilane to form a moisture curable composition.
5 more elements
The reaction product of
- (a) a composition comprising a compound having the formula:
- wherein ABA is a polyester/polyether/polyester triblock copolymer, wherein the polyester (A) blocks comprise a poly(diethylene glycol o-phthalate) block;
- R is C1-6 alkyl group or C6 group, which may optionally be substituted by a halo;
- R1 is C1-6 alkyl group;
- m is 0–2;
- X is independently at each occurrence
- or
- wherein R3 is alkylene;
- R4 is alkyl, aryl, alkaryl or aryalkyl;
- and
- p is 0 or 1;
- and
- (b) a moisture cure catalyst.
10 more elements
The reaction product of
- (a) a composition comprising a compound having the formula:
- wherein ABA is a polyester/polyether/polyester triblock copolymer;
- R is C1-6 alkyl group or C6 group, which may optionally be substituted by a halo;
- R1 is C1-6 alkyl group;
- m is 0–2;
- X is independently at each occurrence
- or
- wherein R3 is alkylene;
- R4 is alkyl, aryl, alkaryl or aryalkyl;
- and
- p is 0 or 1;
- and
- (b) a moisture cure catalyst, wherein the moisture curing catalyst is selected from the group consisting of 1,8-diazabicyclo[5.4.0] undec-7-ene, dimethylaminopyridine and combinations thereof.
10 more elements
Dependencies are inferred from the claim text.