Cure of anhydride functionalized polymers with epoxysilanes

Patent metadata

Field	Value
Publication number	US-2024209133-A1
Application number	US-202118556107-A
Country	US
Kind code	A1
Filing date	Jun 30, 2021
Priority date	Jun 30, 2021
Publication date	Jun 27, 2024
Grant date	—

Abstract

A process to form a composition comprising a crosslinked olefin-based polymer derived from an anhydride-functionalized olefin-based polymer, said process comprising at least the following steps A) and B): A) mixing together at least the following components a and b to form a first composition: a) the anhydride-functionalized olefin-based polymer, and b) at least one epoxy-silane compound; B) exposing the first composition to moisture to form the crosslinked olefin-based polymer. The first compositions and crosslinked compositions are also disclosed.

First claim

1 . A process to form a composition comprising a crosslinked olefin-based polymer derived from an “anhydride-functionalized olefin-based polymer,” said process comprising at least the following steps A) and B):
A) mixing together at least the following components a and b to form a first composition:
a) the “anhydride-functionalized olefin-based polymer,” and
b) at least one epoxy-silane compound;

B) exposing the first composition to moisture to form the crosslinked olefin-based polymer.

2 . The process of claim 1 , wherein the epoxy-silane compound is selected from structures e1) or e2) below:

where R is an alkylene group or a CH 2 O-alkylene group, X1, X2 and X3 are each independently an alkoxy group or an alkyl group, and at least one of X1, X2 or X3 is an alkoxy group; or

where R′ is an alkylene group or a CH 2 O-alkylene group, X4, X5 and X6 are each independently an alkoxy group or an alkyl group, and at least one of X4, X5 or X6 is an alkoxy group.

3 . The process of claim 1 , wherein the first composition, after seven days at 22° C., 50% RH, in air atmosphere, has SAFT value from 70° C. to 170° C.

4 . The process of claim 1 , wherein composition comprises either a crosslinked ethylene-based polymer derived from an anhydride-functionalized ethylene-based polymer, or a crosslinked propylene-based polymer derived from an anhydride-functionalized propylene-based polymer.

5 . The process of claim 1 , wherein composition comprises a crosslinked ethylene-based polymer derived from an anhydride-functionalized ethylene-based polymer.

6 . The process of claim 1 , wherein the first composition has a percent increase in melt viscosity at 120° C. (% Δη2 at 120° C.) from 1.0% to 25%; and where % Δη2 at 120° C.=[(η2−η1)/η1]×100, and where 2 is the melt viscosity after 2 hours at 120° C., and η1 is the melt viscosity after 1 hour at 120° C.

7 . The process of claim 1 , wherein, the first composition further comprises
a tackifier (component c).

8 . A crosslinked composition formed from the process of claim 1 .

9 . A first composition comprising at least the following components a and b:
a) an “anhydride-functionalized olefin-based polymer;” b) at least one epoxy-silane compound.

10 . The composition of claim 9 , wherein the epoxy-silane compound is selected from structures e1) or e2) below:

where R is an alkylene group or a CH 2 O-alkylene group, X1, X2 and X3 are each independently an alkoxy group or an alkyl group, and at least one of X1, X2 or X3 is an alkoxy group; or

where R′ is an alkylene group or a CH 2 O-alkylene group, X4, X5 and X6 are each independently an alkoxy group or an alkyl group, and at least one of X4, X5 or X6 is an alkoxy group.

11 . The composition of claim 9 , wherein the epoxy-silane compound is selected from structures e11), e12), e21), e22), e23), e24), e25), e26), e27) or e28) below:

12 . The composition of claim 9 , wherein component a is an anhydride-functionalized ethylene-based polymer, or an anhydride-functionalized propylene-based polymer.

13 . The composition of claim 9 , wherein component a is an anhydride-functionalized ethylene-based polymer.

14 . The composition of claim 9 , wherein, the first composition further comprises a tackifier (component c).

15 . The composition of claim 9 , wherein the first composition has a percent increase in melt viscosity at 120° C. (% Δη2 at 120° C.) from 1.0% to 25%; and where % Δη2 at 120° C.=[(η2−η1)/η1]×100, and where η2 is the melt viscosity after 2 hours at 120° C., and η1 is the melt viscosity after 1 hour at 120° C.

16 . The composition of claim 9 , wherein the first composition has a percent increase in melt viscosity at 177° C. (% Δη2 at 177° C.) from 10% to 35%; and where % Δη2 at 177° C.=[(η2−η1)/η1]×100, and where η2 is the melt viscosity after 2 hours at 177° C., and η1 is the melt viscosity after 1 hour at 177° C.

17 . The composition of claim 9 , wherein, wherein the first composition, after seven days at 22° C., 50% RH, in air atmosphere, has SAFT value from 70° C. to 135° C.

18 . A crosslinked composition formed from the first composition of claim 9 .

19 . A crosslinked composition comprising at least one of the following structure CL1, CL2, CL3 or any combination thereof:

and wherein, independently, for each of CL1), CL2), CL3),
each independently represents a portion of another polymer chain of the crosslinked composition;
each * independently represents a portion of the remaining polymer chain bonded to the respective —CH 2 —CHZ— group noted above, where Z is the respective pendant crosslinked site noted above;
X is the remaining portion of a C3 to C8 ring structure, which contains a carbon atom that is bonded to Y, or X is not present, and Y is bonded to the terminal carbon atom of a “—CH(OH)—CH 2 —O—” bridge; Y is independently a hydrocarbylene group or a heterohydro-carbylene group; each R is independently an OH group, an alkoxy group or an alkyl group.

20 . An article comprising at least one component formed from the composition of claim 8 .

Assignees

• Dow Global Technologies Llc

Inventors

• He Chao
• Chen Hongyu
• Ma Wanfu
• Ouyang Wuye
• Van Dun Jozef J I
• Mclennaghan Allan Walter

Classifications

• C08F2810/20

  leading to a crosslinking, either explicitly or inherently · CPC title

• C08F110/02

  Ethene · CPC title

• C08F8/46

  Reaction with unsaturated dicarboxylic acids or anhydrides thereof, e.g. maleinisation · CPC title

• C08F8/12

  Hydrolysis · CPC title

• C08F8/42 Primary

  Introducing metal atoms or metal-containing groups · CPC title