Epoxy resin, preparing method thereof, epoxy composition comprising the same, and use thereof
AssigneeKorea Institute of Industrial Technology
InventorsHyun Aee Chun, Sook Yeon Park, Yun Ju Kim, Su Jin Park
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Abstract
The present disclosure relates to an epoxy resin of which distribution of molecular weight having distribution range of molecular weight of 300 to 2,000,000 is adjusted such that an upper limit value is increased to a maximum of 2,000,000, a method of preparing the same, a composition comprising the same, and a use thereof. The epoxy resin having controlled distribution of molecular weight of the present disclosure may have improved thermal properties of an epoxy system by expanding the distribution of molecular weight, and may exhibit excellent processability.
Claims20
An epoxy resin having a controlled molecular weight distribution, comprising:
- (1) one of a first structural unit selected from a group consisting of formulas (AF), (BF), (CF) and (DF);
- and
- (2) one of a second structural unit selected from a group consisting of formulas (1F), (2F), (3F), (4F) and (5F),
- wherein the first structural unit and the second structural unit are connected to each other via formula (L), and
- wherein epoxy equivalent weight (EEW, Epoxy Equivalent Weight) determined by the glycidyl group of formula (E) is 200 g/Eq to 1,000 g/Eq, and a distribution range of molecular weight is 300 to 2,000,000:
- where, in formula (BF), S is
- in formula (DF), t is
- in formulas (AF) to (DF), n is an integer from 1 to 100,
- the epoxy resin has or does not have at least one of formulas (S1) and (S2),
- when the epoxy resin has at least one of formulas (S1) and (S2), at least one of a plurality of M is connected by a single bond to ** in formula (L), a part of the remainder of M is a glycidyl group of formula (E) such that an epoxy equivalent weight (EEW) of an epoxy resin is 200 g/Eq to 1,000 g/Eq, and the remainder of M is at least one selected from a group consisting of formula (S1) and (S2),
- when the epoxy resin does not have at least one of formulas (S1) and (S2), at least one of a plurality of M is connected by a single bond to ** in formula (L), and the remainder of M is a glycidyl group of following formula (E) such that an epoxy equivalent weight (EEW) of an epoxy resin is 200 g/Eq to 1,000 g/Eq,
- where, in formula (L), R is H or —C(═O)—NH—(CH2)3-SiRiR2R3, where at least one of R1 to R3 is a C1-C5 alkoxy group, and the remainder is a C1-C10 alkyl group, and
- ** is a connection by a single bond to M in formulas (AF), (BF), (CF) or (DF), and * is a connection by a single bond to * in formulas (1F), (2F), (3F), (4F) or (5F),
- where, in formula (1F), X is —CH2—, —C(CH3)2—, —C(CF3)2—, —S— or —SO2—, and in formula (3F), each Y is independently selected from H and a methyl group, each * in formulas (1F) to (5F) is a connection by a single bond to * in formula (L),
- where, in formulas (S1) and (S2), R is hydrogen or —C(═O)—NH—(CH2)3—SiR1R2R3, where at least one of R1 to R3 is a C1-C5 alkoxy group, and remainder is a C1-C10 alkyl group, each G is independently selected from a group consisting of a C1 to C10 alkyl group, an allyl group, and a C6 or C10 aryl group, and each n′ is independently an integer of 0 to 5.
A method of preparing an epoxy resin by a molecular weight control reaction of mixing one of an epoxy resin selected from a group consisting of formulas (AS) to (DS) and one of difunctional aromatic alcohol selected from a group consisting of formulas (1) to (5) in a presence of a phosphine-based catalyst and heating a mixture obtained by the mixing:
- where, in formula BS, S is
- in formula DS, t is
- in formulas AS to DS, n is an integer from 1 to 100, and K is a glycidyl group of formula (E),
- where, in formula (1), X is —CH2—, —C(CH3)2—, —C(CF3)2—, —S— or —SO2—, and in formula (3), each Y is independently selected from a group consisting of H and a methyl group.
Dependencies are inferred from the claim text.