US 12,269,202 B2
Method for transferring an embossed structure to the surface of a coating
Jan-Bernd Kues, Muenster (DE); Susanne Piontek, Muenster (DE); Joerg Exner, Muenster (DE); Joerg Lenz, Muenster (DE); Birgit Kleine-Bley, Muenster (DE); Wilfried Schipper, Dortmund (DE); Robert von der AA, Borsdorf/OT Panitsch (DE); Frank Bergmann, Halle (DE); Michael Lorenz, Halle (DE); Sven Olle Krabbenborg, Leipzig (DE); and Joerg Duennewald, Muenster (DE)
Assigned to BASF COATINGS GMBH, Muenster (DE)
Appl. No. 17/041,487
Filed by BASF Coatings GmbH, Münster (DE)
PCT Filed Mar. 28, 2019, PCT No. PCT/EP2019/057923
§ 371(c)(1), (2) Date Sep. 25, 2020,
PCT Pub. No. WO2019/185833, PCT Pub. Date Oct. 3, 2019.
Claims priority of application No. 18164689 (EP), filed on Mar. 28, 2018.
Prior Publication US 2021/0129415 A1, May 6, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 59/04 (2006.01); B29C 59/02 (2006.01); B44B 5/02 (2006.01); B44C 1/24 (2006.01); C09D 4/06 (2006.01); C09D 133/08 (2006.01); C09D 133/12 (2006.01); C09J 7/29 (2018.01); B29K 667/00 (2006.01); B29L 7/00 (2006.01); B29L 31/00 (2006.01)
CPC B29C 59/046 (2013.01) [B29C 59/022 (2013.01); B44B 5/026 (2013.01); B44C 1/24 (2013.01); C09D 4/06 (2013.01); C09D 133/08 (2013.01); C09D 133/12 (2013.01); C09J 7/29 (2018.01); B29C 2059/023 (2013.01); B29K 2667/003 (2013.01); B29L 2007/001 (2013.01); B29L 2031/7562 (2013.01); C09J 2301/122 (2020.08)] 11 Claims
OG exemplary drawing
 
1. A method for transferring an embossed structure to at least a part of a surface of a coating (B2), using a composite (F1B1) composed of a substrate (F1) and of an at least partially embossed and at least partially cured coating (B1), where the coating (B2) and the coating (B1) of the composite (F1B1) have embossed structures which are mirror images of one another, the method comprising:
(1) applying a coating composition (B2a) to at least a part of an at least partially embossed surface of a composite (B1F1) comprising the substrate (F1), and the at least partially embossed and at least partially cured coating (B1), to give a composite (B2aB1F1), and
(2) (2) at least partially curing the applied coating composition (B2a) to give a composite (B2B1F1) comprising the substrate (F1), the at least partially embossed and at least partially cured coating (B1), and the at least partially cured coating (B2), and
(3) removing the coating (B2) from the composite (B2B1F1) to restore the composite (B1F1) used in step (1), where the coating (B2), on its surface previously facing the coating (B1) within the composite (B2B1F1), has a negative image of the at least partially embossed surface of the coating (B1) of the composite (B1F1) used in step (1) and restored in that step,
wherein:
the coating (B2) in step (3) is obtained as a free film by peeling from the composite (B2B1F1) with additional restoration of the composite (B1F1), or
the coating (B2) is obtained in step (3) in three stages in a form of a composite (B2KF2), the method further comprising:
(3a) applying an adhesive (K) to at least a part of a surface of the composite (B2B1F1), on its side having the coating (B2), to give a composite (KB2B1F1),
(3b) applying a substrate (F2) to the composite (KB2B1F1) obtained after stage (3a), to at least a part of its surface having the adhesive (K), or vice-versa, to give a composite (F2KB2B1F1), and
(3c) peeling the composite (B1F1) from the composite (F2KB2B1F1) to give a composite (F2KB2), where the coating (B2) of this composite has on its surface at least partially the negative image of the at least partially embossed surface of the coating (B1) of the composite (B1F1),
where the coating composition (B1a) used for producing the coating (B1) of the composite (B1F1) used in step (1) and restored in step (3) is a radiation-curable coating composition,
wherein the radiation-curable coating composition (B1a) comprises
at least one component (a) in an amount in a range from 40 to 95 wt %,
at least one additive as component (b) in an amount in a range from 0.01 to 5 wt %,
at least one photoinitiator as component (c) in an amount in a range from 0.01 to 15 wt %, and
at least one component (d), comprising at least one carbon double bond, in an amount in a range from 0 to 45 wt %,
where (i) the components (a), (b), (c), and (d) are each different from one another, (ii) the stated amounts of the components (a), (b), (c), and (d) are each based on a total weight of the coating composition (B1a), and (iii) the amounts of all components present in the coating composition (B1a) add up to 100 wt %,
and where component (a) comprises at least three structural units, each different from one another or at least partially identical, of formula (I)

OG Complex Work Unit Chemistry
in which
radicals R1 in each case independently of one another are a C2-C8 alkylene group, radicals R2 in each case independently of one another are H or methyl, and
m each independently of one another are an integral parameter in a range from 1 to 15, but with proviso that m is at least 2 in at least one of the structural units of the formula (I) within the component (a).
 
10. A method for producing a coating (B2), embossed at least partially on one of its surfaces, in the form of a free film, using a composite (B2B1F1) comprising:
a substrate (F1),
an at least partially embossed and at least partially cured coating (B1), and
an at least partially cured coating (B2) applied to (B1),
where the coating (B1) is producible by at least partially curing a coating composition (B1a), applied to at least a part of a surface of the substrate (F1) and at least partially embossed, by radiation curing, where the coating composition (B1a) is a radiation-curable coating composition,
wherein the coating composition (B1a) comprises:
at least one component (a) in an amount in a range from 40 to 95 wt %,
at least one additive as component (b) in an amount in a range from 0.01 to 5 wt %,
at least one photoinitiator as component (c) in an amount in a range from 0.01 to 15 wt %, and
at least one component (d), comprising at least one carbon double bond, in an amount in a range from 0 to 45 wt %,
where (i) the components (a), (b), (c), and (d) are each different from one another, (ii) the stated amounts of the components (a), (b), (c), and (d) are each based on a total weight of the coating composition (B1a), and (iii) the amounts of all components present in the coating composition (B1a) add up to 100 wt %,
and where component (a) comprises at least three structural units, each different from one another or at least partially identical, of formula (I)

OG Complex Work Unit Chemistry
wherein radicals R1 in each case independently of one another are a C2-C8 alkylene group, radicals R2 in each case independently of one another are H or methyl, and m each independently of one another are an integral parameter in a range from 1 to 15, but with proviso that m is at least 2 in at least one of the structural units of the formula (I) within the component (a).
 
11. A method for producing a composite (B2KF2) comprising a substrate (F2), at least one adhesive (K), and the coating (B2), using a composite (B2B1F1) comprising:
a substrate (F1),
an at least partially embossed and at least partially cured coating (B1), and
an at least partially cured coating (B2) applied to (B1),
where the coating (B1) is producible by at least partially curing a coating composition (B1a), applied to at least a part of a surface of the substrate (F1) and at least partially embossed, by radiation curing, where the coating composition (B1a) is a radiation-curable coating composition,
wherein the coating composition (B1a) comprises:
at least one component (a) in an amount in a range from 40 to 95 wt %,
at least one additive as component (b) in an amount in a range from 0.01 to 5 wt %,
at least one photoinitiator as component (c) in an amount in a range from 0.01 to 15 wt %, and
at least one component (d), comprising at least one carbon double bond, in an amount in a range from 0 to 45 wt %,
where (i) the components (a), (b), (c), and (d) are each different from one another, (ii) the stated amounts of the components (a), (b), (c) and (d) are each based on a total weight of the coating composition (B1a), and (iii) the amounts of all components present in the coating composition (B1a) add up to 100 wt %,
and where component (a) comprises at least three structural units, each different f rom one another or at least partially identical, of formula (I)

OG Complex Work Unit Chemistry
wherein radicals R1 in each case independently of one another are a C2-C8 alkylene group, radicals R2 in each case independently of one another are H or methyl, and m each independently of one another are an integral parameter in a range from 1 to 15, but with proviso that m is at least 2 in at least one of the structural units of the formula (I) within the component (a).