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US 2020/0048394 A1Published application
Hardenable polymer composition
AssigneeBASF SE
InventorsBernd HOEVEL, Angelika ROSER, Juergen PFISTER, Thomas CHRIST
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Abstract
The present invention relates to a hardenable polymer composition containing at least one acrylate compound, at least one silyl-terminated polymer and at least one photoinitiator, to the use of the polymer composition as or in an adhesive, a sealant, gasket, knifing filler or coating composition, and to an adhesive composition, a sealant composition, a gasket composition, a knifing filler composition or a coating composition comprising the polymer composition.
Claims25
1:
- A hardenable polymer composition, comprising
- (a) at least one acrylate compound;
- (b) at least one silyl-terminated polymer;
- and
- (c) at least one photoinitiator.
2 more elements
2:
- The polymer composition according to claim 1, wherein the acrylate compound is an acrylate polymer containing an acrylic acid ester in polymerized form as main component of the polymer.
3:
- The polymer composition according to claim 2, wherein the acrylate polymer is at least one selected from the group consisting of an acrylate polymer containing at least one functional group prone to photoinitiation and an acrylate polymer containing at least one hydroxyl group.
4:
- The polymer composition according to claim 3, wherein the acrylate polymer is at least one acrylate polymer containing a functional group prone to photoinitiation, which is at least one selected from the group consisting of a keto group, a formyl group, a thioketo group and a C—C triple bond.
5:
- The polymer composition according to claim 4, wherein the functional group prone to photoinitiation is derived from a benzophenone group.
6:
- The polymer composition according to claim 5, wherein the acrylate polymer containing a functional group prone to photoinitiation comprises
- at least 60 mol-%, relative to 1 mol of the polymer, of repeating units of the following formula I:
- where in a part of the repeating units radical Rα is C1-C10-alkyl and in another part of the repeating units is a group of formula Rα.1
- where
- # is an attachment point to the remainder of the molecule;
- L is a bond or a spacer group of C1-C8-alkylene which is optionally bound to the phenyl ring via a linking group selected from the group consisting of —O—, —O—C(O)—, —C(O)—O—, —O—C(O)—O—, —NH—, —NH—C(O)—, —C(O)—NH—, —NH—C(O)—NH—, —O—C(O)—NH— and —NH—C(O)—O—;
- Rγ is OH, C1-C6-alkyl or C1-C6-alkoxy;
- and
- m is 0, 1, 2, 3, 4 or 5;
- and
- optionally repeating units of formulae II, III and/or IV:
- where Rα is independently as defined above.
9 more elements
7:
- The polymer composition according to claim 6, wherein the acrylate polymer containing a functional group prone to photoinitiation comprises
- from 80 to 99.9 mol-% of repeating units of the formula I wherein Rα is C1-C10-alkyl;
- from 0.01 to 20 mol-% of repeating units of the formula I wherein Rα is a benzophenone group of formula Rα.1;
- and
- from 0 to 15 mol-% of repeating units of formula III;
- relative to 1 mol of the polymer,
- wherein the mol percentages of repeating units of the formula I wherein Rα is C1-C10-alkyl, repeating units of the formula I wherein Rα is a benzophenone group, and repeating units of the formula III essentially sum up to 100 mol-%.
4 more elements
8:
- The polymer composition according to claim 3, wherein the acrylate polymer is at least one acrylate polymer containing a hydroxyl group, which contains C2-C4-hydroxyalkylacrylate in (co)polymerized form.
9:
- The polymer composition according to claim 1, wherein the acrylate compound has a weight average molecular weight of more than 30000.
10:
- The polymer composition according to claim 1, wherein the silyl-terminated polymer is a polymer of formula 1
- [(R′)a(R″O)3-aSi-L1-Y]b—Po (I)
- where
- Po is a di-, tri- or tetravalent radical of a base polymer;
- each Y is independently selected from the group consisting of a bond, —NH—C(═O)—O—, —O—C(═O)—NH—, —C(═O)—NH-L2-NH—C(═O)—NH—, —NH—C(═O)—NH-L2-NH—C(═O)—, —O—C(═O)—, —C(═O)—O—, —NH—C(═O)—S—, —S—C(═O)—NH— and —O—;
- R′ and R″, independently of each other and independently of each occurrence, are C1-C6-alkyl;
- L1 is C1-C3-alkylene;
- L2 is a divalent aliphatic, cycloaliphatic or aromatic radical;
- each a is independently 0 or 1;
- and
- b is 2, 3 or 4.
8 more elements
11:
- The polymer composition according to claim 10, wherein Po is the di-, tri- or tetravalent radical of a polymer selected from the group consisting of a polyether, a polyester, a polyamide, a polyimine, a polyurethane, a poly(meth)acrylate, a polyvinylester, a polyolefin and a mixture thereof.
12:
- The polymer composition according to claim 11, wherein Po is the divalent radical of a polyether.
13:
- The polymer composition according to claim 10, wherein
- Y is —NH—C(═O)—O—;
- R′ and R″, independently of each other and independently of each occurrence, are methyl or ethyl;
- and
- each L1 is independently —CH2— or C3-alkylene.
2 more elements
14:
- The polymer composition according to claim 1, wherein the at least one photoinitiator is a photolatent latent initiator which becomes active with UV C radiation, UV B radiation, UV A radiation and/or radiation in the visible range;
- a photoinitiator which is not photolatent and which becomes active with UV C radiation;
- or a mixture of said photolatent latent initiator and said photoinitiator which becomes active with UV C radiation.
15:
- The polymer composition according to claim 14, wherein the at least one photoinitiator is a photolatent latent initiator or a mixture of a photolatent latent initiator and a photoinitiator which is not photolatent and which becomes active with UV C radiation.
16:
- The polymer composition according to claim 14, wherein the at least one photoinitiator is a photolatent initiator, which is selected from the group consisting of a photolatent base, a photolatent acid generator and a photolatent metal-based initiator.
17:
- The polymer composition according to claim 16, wherein the photolatent initiator is
- a photolatent base, which is a Ba—Za compound, where Ba and Za are covalently bound, and where Ba is derived from a base selected from the group consisting of an amidine, a guanidine and a secondary amine, and Za is a photolytically removable group;
- or
- a photolatent acid generator, which is a Ab-Zb compound, where Ab and Zb are covalently bound, and where Ab is derived from an acid selected from the group consisting of an aliphatic sulfonic acid and an aromatic sulfonic acid, and Zb is a photolytically removable group;
- or an acylphosphine oxides;
- or an ionic photoacid generator;
- or
- a metal-based initiator, which is a titanium complex containing at least one photolytically removable ligand.
5 more elements
18:
- The polymer composition according to claim 17, wherein the photolatent initiator is a photolatent base, which is a compound of formulae PLB.1 to PLB.7:
- where
- each R18 is independently C1-C6-alkyl, C1-C6-alkoxy, C1-C6-alkylthio, C1-C6-alkylsulfinyl, C1-C6-alkylsulfonyl, C1-C6-alkylcarbonyl or C1-C6-alkoxycarbonyl;
- R19 is hydrogen or C1-C4-alkyl;
- and
- s is 0, 1, 2, 3, 4 or 5.
3 more elements
19:
- The polymer composition according to claim 18, wherein the photolatent base is a compound of formula PLB.1, PLB.2, PLB.4, PLB.5, PLB.6 or PLB.7.
20:
- The polymer composition according to claim 17, wherein the photolatent initiator is a photolatent acid generator, which is an acylphosphine oxide of formula PAG.2
- where
- R22 is C1-C10-alkyl, C1-C10-alkoxy or phenyl which optionally comprises 1, 2, 3, 4 or 5 substituents selected from the group consisting of C1-C6-alkyl and C1-C6-alkoxy;
- R23 is C1-C10-alkyl, C1-C10-alkoxy, C(O)R25 or phenyl which optionally comprises 1, 2, 3, 4 or 5 substituents selected from the group consisting of C1-C6-alkyl and C1-C6-alkoxy;
- R24 is C1-C6-alkyl or C1-C6-alkoxy;
- R25 is C1-C10-alkyl, C1-C10-alkoxy or phenyl which optionally comprises 1, 2, 3, 4 or 5 substituents selected from the group consisting of C1-C6-alkyl and C1-C6-alkoxy;
- and
- q is 0, 1, 2, 3, 4 or 5.
5 more elements
21:
- The polymer composition according to claim 1, containing:
- (a) at least one acrylate compound:
- 1 to 98% by weight;
- (b) at least one silyl-terminated polymer:
- 1 to 98% by weight;
- (c) at least one photoinitiator:
- 0.0001 to 9% by weight;
- and
- (d) at least one further additive:
- 0 to 98% by weight;
- where the acrylate compound and the silyl-terminated polymer are used in a weight ratio of from 50:1 to 1:50;
- and the photoinitiator (c) and the polymer (a) or (b) which is used in lower amounts are used in a weight ratio of from 1:10 to 1:10000.
9 more elements
22:
- The polymer composition according to claim 1, which is liquid at 25° C. and 1013 mbar and contains at most 5% by weight, based on the total weight of the composition, of solvents.
23:
- The polymer composition according to claim 1, which is a hot melt composition at 25° C. and 1013 mbar.
(canceled)
25:
- An adhesive composition, or a sealant composition, or a gasket composition, or a knifing filler composition or a coating composition, comprising the polymer composition according to claim 1.
Dependencies are inferred from the claim text.