Vitrimers containing additives
AssigneeMallinda
InventorsPhilip Taynton, Heather Rubin, Sara Meyer, Marina Tobey, Erik Rognerud, Sarah Sadowski
Life of this patent
Estimating the term…
Abstract
Covalent network polymers that include one or more of a cure rate modifying (CRM) additive, a tack modifying additive, a flame retardant additive, a physical additive, and a viscosity modifying additive allow the viscosity, pot life, tackiness and safety of chemical mixtures and products to be tailored without sacrificing the mechanical properties or reprocessability of the final vitrimers. Use of additives also enables previously infeasible manufacturing techniques.
Claims16
A recyclable, moldable and weldable covalent network polymer prepared from an amine-terminated imine-linked oligomer, a crosslinker, a cure rate modifying (CRM) additive, and one or more of a tack modifying additive, a flame retardant additive, a physical additive, and a viscosity modifying additive such that the covalent network polymer exhibits at least two of the following properties:
- i. Tg (Peak Tan Delta) equal to or greater than 60° C.;
- ii. Cure time in the range of 1 minute to 45 minutes;
- iii. Melt viscosity 3,700-131,000 cP;
- iv. Flame retardance:
- V0 rating in UL94 vertical flame test;
- V. Pot life greater than or equal to 40 minutes;
- vi. Short beam shear strength (aka ILSS) greater than or equal to 33 MPa;
- and
- vii. Flexural strength greater than or equal to 41 MPa;
- wherein the CRM additive is selected from the group consisting of imidazoles, acetates, diketones, and combinations thereof.
A process for forming a recyclable, moldable and weldable covalent network polymer comprising:
- combining an amine-terminated imine-linked oligomer, a crosslinker, a cure rate modifying (CRM) additive, and one or more of a tack modifying additive, a flame retardant additive, a physical additive, and a viscosity modifying additive, such that the covalent network polymer exhibits at least two of the following properties:
- i. Tg (Peak Tan Delta) equal to or greater than 60° C.;
- ii. Cure time in the range of 1 minute to 45 minutes;
- iii. Melt viscosity 3,700-131,000 cP;
- iv. Flame retardance:
- V0 rating in UL94 vertical flame test;
- v. Pot life greater than or equal to 40 minutes;
- vi. Short beam shear strength (aka ILSS) greater than or equal to 33 MPa;
- and
- vii. Flexural strength greater than or equal to 41 MPa;
- wherein the CRM additive is selected from the group consisting of imidazoles, acetates, diketones, and combinations thereof.
Dependencies are inferred from the claim text.