Curable silyl-containing polymer composition containing paint adhesion additive
View Patent ↗A curable composition comprising a hydrolysable silyl-containing polymer and a silicone-containing paint adhesion additive that provide curable silyl-containing polymer composition which has improved adhesion of coatings, paints, adhesives, and other surface treatments thereto.
1. A curable silyl-containing polymer composition comprising:
a) at least one hydrolysable silyl-containing polymer represented by the general formula:
wherein:
R 1 is a monovalent or polyvalent organic polymer fragment having a number average molecular weight of from about 500 to about 100,000 grams/mole;
each occurrence of R 2 is independently a divalent hydrocarbyl group containing from 1 to 12 carbon atoms selected from the group consisting of divalent alkylene, alkenylene, arenylene, arylene and aralkylene, and, optionally, contains at least one heteroatom selected from the group consisting of oxygen, nitrogen and sulfur;
each occurrence of A 1 is independently selected from divalent oxygen (—O—), sulfur (—S—) or substituted nitrogen of the structure (−) 2 NR 3 , wherein R 3 is hydrogen, alkyl, alkenyl, arenyl, aryl, aralkyl or —R 2 SiX 1 X 2 X 3 group, wherein each R 3 , other than hydrogen, contains from 1 to 18 carbon atoms, and with the provisos that when A 1 is oxygen or sulfur, then A 2 is (−) 2 NR 3 and when a is 0, then A 1 is oxygen;
each occurrence of A 2 is independently selected from divalent oxygen (—O—), sulfur (—S—) or substituted nitrogen of the structure (−) 2 NR 3 , wherein R 3 is hydrogen, alkyl, alkenyl, arenyl, aryl, aralkyl or —R 2 SiX 7 X 8 X 9 group, wherein each R 3 , other than hydrogen, contains from 1 to 18 carbon atoms, and with the provisos that when A 2 is oxygen or sulfur, then A 1 is (−) 2 NR 3 ;
each occurrence of X 1 is independently selected from the group consisting of R 4 O—, R 4 C(═O)O—, R 4 2 C═NO—, R 4 2 C═CR 4 O—, and R 4 2 NO—wherein each R 4 is independently selected from the group consisting of hydrogen, alkyl, alkenyl, arenyl, aryl, and aralkyl groups, wherein each R 4 , other than hydrogen, contains from 1 to 18 carbon atoms, and, optionally, contains at least one oxygen or sulfur atom;
each occurrence of X 2 and X 3 is independently selected from the group consisting of R 4 O—, R 4 C(═O)O—, R 4 2 C═NO—, R 4 2 C═CR 4 O—, R 4 2 NO—and R 4 wherein each R 4 is independently selected from the group consisting of hydrogen, alkyl, alkenyl, arenyl, aryl, and aralkyl groups, wherein each R 4 , other than hydrogen, contains from 1 to 18 carbon atoms and, optionally, contains at least one oxygen or sulfur atom; and,
each occurrence of subscripts a and b is independently an integer wherein a is 0 or 1 and b is 1 to 6.
b) at least one silicone-containing paint adhesion additive selected from the group consisting of:
(CH 3 ) 3 SiO—[Si(CH 3 ) 2 O—] 20 [SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 10 (CH 2 CH(CH 3 )O) 20 H)O—] 3 Si(CH 3 ) 3 ;
(CH 3 ) 3 SiO—[Si(CH 3 ) 2 O—] 50 [SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 10 (CH 2 CH(CH 3 )O) 20 H)O—] 8 Si(CH 3 ) 3 ;
(CH 3 ) 3 SiO—[Si(CH 3 ) 2 O—] 75 [SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 10 (CH 2 CH(CH 3 )O) 20 H)O—] 10 Si(CH 3 ) 3 ;
(CH 3 ) 3 SiO—[Si(CH 3 ) 2 O—] 75 [SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 22 (CH 2 CH(CH 3 )O) 8 H)O—] 10 Si(CH 3 ) 3 ;
(CH 3 ) 3 SiO—[Si(CH 3 ) 2 O—] 100 [SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 10 (CH 2 CH(CH 3 )O) 20 H)O—] 15 Si(CH 3 ) 3 ;
(CH 3 ) 3 SiO—[Si(CH 3 ) 2 O—] 50 [SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 10 (CH 2 CH(CH 3 )O) 10 CH 3 )O—] 5 Si(CH 3 ) 3 ;
(CH 3 ) 3 SiO—[Si(CH 3 ) 2 O—] 70 [SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 35 (CH 2 CH(CH 3 )O) 40 CH 3 )O—] 5 Si(CH 3 ) 3 ;
(CH 3 ) 3 SiO—[Si(CH 3 ) 2 O—] 70 [SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 15 (CH 2 CH(CH 3 )O) 15 CH 3 )O—] 5 Si(CH 3 ) 3 ;
(CH 3 ) 3 SiO—[Si(CH 3 ) 2 O—] 75 [SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 15 (CH 2 CH(CH 3 )O) 15 CH 3 )O—] 5 Si(CH 3 ) 3 ;
(CH 3 ) 3 SiO—[Si(CH 3 ) 2 O—] 100 [SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 15 (CH 2 CH(CH 3 )O) 20 CH 3 )O—] 15 Si(CH 3 ) 3 ;
(CH 3 ) 3 SiO—[Si(CH 3 ) 2 O—] 75 [SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 15 (CH 2 CH(CH 3 )O) 15 COCH 3 )O—] 5 Si(CH 3 ) 3 ;
and (CH 3 ) 3 SiO—[Si(CH 3 ) 2 O—] 75 [SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 13 (CH 2 CH(CH 3 )O) 15 H)O—] 4 —[SiCH 3 ((CH 2 ) 3 O(CH 2 CH 2 O) 35 (CH 2 CH(CH 3 )O) 40 H)O—]Si(CH 3 ) 3 .
c) optionally, at least one ingredient selected from the group consisting of filler, plasticizer, thixotrope, antioxidant, ultra-violet stabilizer, adhesion promoter, cure catalyst, moisture scavenger, pigment, dye, surfactant, solvent and biocide.
2. The composition of claim 1 wherein the hydrolysable silyl-containing polymer is a hydrolysable silylated hydrogenated polybutadiene diol.
3. The composition of claim 1 wherein the hydrolysable silyl-containing polymer is a hydrolysable silylated polyether diol.
4. The composition of claim 1 wherein the hydrolysable slyl-containing polymer is hydrolysable silylated polyurethane.
5. The composition of claim 1 wherein the hydrolysable silyl-containing polymer is a hydrolysable silylated polyurethane obtained from a polyether diol, a diisocyanate and an active hydrogen-containing hydrolysable silane.
6. The composition of claim 1 wherein the hydrolysable silyl-containing polymer is a silylated polyurethane obtained from the reaction of hydroxyl-terminated polyether polyol and isocyanatosilane.
7. The composition of claim 1 wherein the hydrolysable silyl-containing polymer is a silylated polyurethane obtained from the reaction of an isocyanato-terminated polyether polyol and aminosilane.
8. The composition of claim 1 wherein hydrolysable silyl-containing polymer ranges in amount from 90 to 99.95 weight percent based upon the total weight of hydrolysable silyl-containing polymer (a) and silicone-containing paint adhesion additive (b).
9. The composition of claim 1 wherein hydrolysable silyl-containing polymer ranges in amount from 95 to 99.9 weight percent based upon the total weight of hydrolysable silyl-containing polymer (a) and silicone-containing paint adhesion additive (b).
10. The composition of claim 1 wherein silyl-containing polymer ranges in amount from 97 to 99.5 weight percent based upon the total weight of hydrolysable silyl-containing polymer (a) and silicone-containing paint adhesion additive (b).
11. The composition of claim 1 wherein silicone-containing paint adhesion additive ranges in amount from 0.05 to 10 weight percent based upon the total weight of hydrolysable silyl-containing polymer (a) and silicone-containing paint adhesion additive (b).
12. The composition of claim 1 wherein silicone-containing paint adhesion additive ranges in amount from 0.1 to 5 weight percent upon the total weight of hydrolysable silyl-containing polymer (a) and silicone-containing paint adhesion additive (b).
13. The composition of claim 1 wherein the silicone-containing paint adhesion additive ranges in amount from 0.5 to 3 weight percent based upon the total weight of hydrolysable silyl-containing polymer (a) and silicone-containing paint adhesion additive (b).
14. The composition of claim 1 wherein the silicone-containing paint adhesion additive (b) has a viscosity that ranging from 100 to 5000 cSt.
15. The cured composition of claim 1 .
16. The composition of claim 15 wherein the cured composition has a contact angle measured using a 3 microliter droplet of water and allowing it to equilibrate for 10 seconds of least than 90°.
17. A sealant prepared with the composition of claim 1 .
18. The sealant of claim 17 having a paint adhesion value ranging from 4B to 5B within 4 days of being painted as measured by ASTM D3359.