1. A roof-rack mechanism comprising:
at least one track, at least one retaining device attached to said at least one track, and
a lock device engaged with said at least one track and said at least one retaining device for detachably attaching said at least one retaining device to said at least one track.
2. The roof-rack mechanism as claimed in claim 1, wherein said at least one retaining device includes a base member, and a bracket attached to said base member and mounted on said at least one track.
3. The roof-rack mechanism as claimed in claim 2, wherein said bracket includes a recess formed between two legs for engaging with said at least one track, and said lock device is engaged with said at least one track and said legs of said bracket.
4. The roof-rack mechanism as claimed in claim 3, wherein said at least one retaining device includes two flaps engaged onto said legs of said bracket and secured to said legs and said at least one track with said lock device.
5. The roof-rack mechanism as claimed in claim 2, wherein said at least one retaining device includes a bar engaged between said base member and said bracket.
6. The roof-rack mechanism as claimed in claim 2, wherein said at least one retaining device includes a cover pivotally attached to said base member with a coupler.
7. The roof-rack mechanism as claimed in claim 6, wherein said coupler includes two arms attached to said base member and said cover respectively and pivotally coupled together with a pivot axle for allowing said cover to be rotated relative to said base member.
8. The roof-rack mechanism as claimed in claim 7, wherein said coupler includes a spring biasing member engaged onto said pivot axle and engaged with said arms for biasing said cover away from said base member.
9. The roof-rack mechanism as claimed in claim 7, wherein said coupler includes two housings attached to said base member and said cover and engaged onto said arms for shielding said arms respectively.
10. The roof-rack mechanism as claimed in claim 6, wherein said at least one retaining device includes a latch device for latching said base member and said cover together at a working position.
11. The roof-rack mechanism as claimed in claim 10, wherein said latch device includes a securement plate attached to said cover, and an actuating lever pivotally secured to said base member with a pivot shaft, and said actuating lever includes a latch tongue for selectively engaging with said securement plate of said cover and for locking said cover to said base member.
12. The roof-rack mechanism as claimed in claim 11, wherein said actuating lever includes a hand grip for moving said latch tongue of said actuating lever from said securement plate of said cover.
13. The roof-rack mechanism as claimed in claim 11, wherein said securement plate includes a lock opening formed therein and defined by an anchoring element for selectively engaging with said latch tongue of said actuating lever.
14. The roof-rack mechanism as claimed in claim 11, wherein said latch device includes a cap attached to said securement plate and said cover, and a lock element rotatably engaged in said cap for engaging with said actuating lever and for locking said latch tongue of said actuating lever in engagement with said securement plate of said cover.
15. The roof-rack mechanism as claimed in claim 14, wherein said actuating lever includes a notch formed therein, and said lock element includes an anchor having a first side and a second side, said first side of said anchor includes a length greater than a width of said notch of said actuating lever for preventing said anchor from engaging through said notch of said actuating lever, and said second side of said anchor includes a length no greater than said width of said notch of said actuating lever for allowing said anchor to be engaged through said notch of said actuating lever.
16. The roof-rack mechanism as claimed in claim 14, wherein said lock element includes an engaging slit formed therein.
17. The roof-rack mechanism as claimed in claim 11, wherein said latch device includes a casing attached to said base member for shielding said actuating lever.
18. The roof-rack mechanism as claimed in claim 11, wherein said latch device includes a spring biasing member attached onto said pivot shaft and engaged between said base member and said actuating lever for biasing said latch tongue of said actuating lever to engage with said securement plate of said cover.
19. The roof-rack mechanism as claimed in claim 1, wherein said at least one track includes at least one fastening strap.
20. The roof-rack mechanism as claimed in claim 1, wherein said at least one retaining device includes an L-shaped bracket detachably attached to said at least one track with said lock device, and an engaging belt attached to said L-shaped bracket.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A thermosetting film-forming composition comprising:
(a) a polytrialkanolamine; and
(b) a crosslinking agent composition that, upon reaction with the polytrialkanolamine, forms a three-dimensional crosslinked network comprising atrane-containing linkages between a plurality of polymer backbones.
2. The composition of claim 1, wherein the polytrialkanolamine is a polymer.
3. The composition of claim 2, wherein the polytrialkanolamine is the reaction product of reactants comprising:
(a) a polymeric polyepoxide; and
(b) a dialkanolamine.
4. The composition of claim 1, wherein the crosslinking agent composition comprises silicon and, upon reaction with the polytrialkanolamine, forms a three-dimensional polymeric network comprising silatrane-containing linkages.
5. The composition of claim 1, wherein the crosslinking agent composition comprises a polytrialkoxide comprising at least two moieties of the general formula:
-M(OR\u2032)3, wherein:
(i) M is silicon, aluminum, titanium, andor zirconium; and
(ii) each R\u2032 is independently a hydroxyl group or an alkyl group.
6. The composition of claim 5, wherein each M is silicon.
7. The composition of claim 5, wherein the polytrialkoxide comprises a polymer.
8. The composition of claim 7, wherein the polymer comprises an acrylic polymer synthesized from one or more unsaturated polymerizable monomers comprising a silane-containing ethylenically unsaturated polymerizable monomer.
9. The composition of claim 5, wherein the crosslinking agent composition comprises a Michael addition reaction product of reactants comprising: (a) a compound comprising more than one site of ethylenic unsaturation, and (b) an aminofunctional silane.
10. The composition of claim 1, wherein the crosslinking agent composition comprises:
(a) a tetraalkoxide of the general formula M(OR\u2032)4, wherein (i) M is silicon, aluminum, titanium, andor zirconium, and (ii) each R\u2032 is independently a hydroxyl group or an alkyl group; and
(b) a compound comprising two or more active hydrogen groups.
11. The composition of claim 1, wherein the crosslinking agent composition comprises:
(a) an alkoxy-functional andor hydroxy-functional atrane of the general formula:
wherein (i) M is silicon, aluminum, titanium, andor zirconium; (ii) each R is independently hydrogen, an alkyl group, an aryl group, andor a functional group containing moiety, such as a hydroxyl group, amine group, andor ether group containing moiety; and (iii) R\u2033 is hydrogen or an alkyl group; and
(b) a compound comprising two or more active hydrogen groups.
12. A method of providing a cured coating on a substrate comprising:
(a) depositing onto the substrate a coating composition comprising:
(i) a polytrialkanolamine; and
(ii) a crosslinking agent composition; and
(b) reacting the trialkanolamine with the crosslinking agent composition, thereby forming a cured coating comprising a three-dimensional polymeric network comprising atrane-containing linkages between a plurality of polymer backbones.
13. The method of claim 12, wherein the polytrialkanolamine is a polymer.
14. The method of claim 13, wherein the polytrialkanolamine is the reaction product of reactants comprising:
(a) a polymeric polyepoxide; and
(b) a dialkanolamine.
15. The method of claim 12, wherein the crosslinking agent composition comprises silicon.
16. The method of claim 12, wherein the crosslinking agent composition comprises a polytrialkoxide comprising at least two moieties of the general formula:
-M(OR\u2032)3, wherein:
(i) M is silicon, aluminum, titanium, andor zirconium; and
(ii) each R\u2032 is independently a hydroxyl group or an alkyl group.
17. The method of claim 16, wherein each M is silicon.
18. The method of claim 16, wherein the polytrialkoxide comprises a polymer.
19. The method of claim 18, wherein the polymer comprises an acrylic polymer synthesized from one or more unsaturated polymerizable monomers comprising a silane-containing ethylenically unsaturated polymerizable monomer.
20. The method of claim 16, wherein the crosslinking agent composition comprises a Michael addition reaction product of reactants comprising: (a) a compound comprising more than one site of ethylenic unsaturation, and (b) an aminofunctional silane.
21. The method of claim 12, wherein the crosslinking agent composition comprises:
(a) a tetraalkoxide of the general formula M(OR\u2032)4, wherein (i) M is silicon, aluminum, titanium, andor zirconium, and (ii) each R\u2032 is independently a hydroxyl group or an alkyl group; and
(b) a compound comprising two or more active hydrogen groups.
22. The method of claim 12, wherein the crosslinking agent composition comprises:
(a) an alkoxy-functional andor hydroxy-functional atrane of the general formula:
wherein (i) M is silicon, aluminum, titanium, andor zirconium; (ii) each R is independently hydrogen, an alkyl group, an aryl group, andor a functional group containing moiety, and (iii) R\u2033 is hydrogen or an alkyl group; and
(b) a compound comprising two or more active hydrogen groups.