Polybenzoxazine precursor and method for preparing same

Patent metadata

Field	Value
Publication number	US-10144716-B2
Application number	US-201515532576-A
Country	US
Kind code	B2
Filing date	Dec 7, 2015
Priority date	Dec 5, 2014
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

This invention relates to a polybenzoxazine precursor and a method of preparing the same, and more particularly, to a polybenzoxazine precursor which includes benzoxazine obtained by reacting a phenol novolak resin with an aldehyde compound and allylamine and diaminodiphenylmethane as an amine compound, and to a method of preparing the same. The polybenzoxazine precursor may serve to prepare a hardened material having excellent thermal and electrical characteristics and dimensional stability. Accordingly, the polybenzoxazine precursor may be available for use in a copper clad laminate, a semiconductor encapsulant, a printed circuit board, an adhesive, a paint, and a mold.

First claim

The invention claimed is:

1. A polybenzoxazine precursor comprising:
a benzoxazine compound represented by the following Chemical Formula 1 so that a content of the benzoxazine compound of the following Chemical Formula 1 where n1 is 0, n2 is 0, and m is 1 is 5 to 50%:

wherein n1 and n2 are identical or different and are each an integer of 0 to 2, and m is an integer of 1 to 6.

2. The polybenzoxazine precursor of claim 1 , wherein the precursor has a weight-average molecular weight of 1500 to 8000 g/mol and a glass transition temperature of 210° C. or higher.

3. A method of preparing a polybenzoxazine precursor of claim 1 , the method comprising:
reacting a phenol novolak resin with an aldehyde compound and allylamine and diaminodiphenylmethane as an amine compound,
wherein the phenol novolak resin is represented by the following Chemical Formula 2 and a component of Chemical Formula 2 where n is 0 is included in a content of 65% or more;

wherein n is an integer of 0 to 2.

4. The method of claim 3 , wherein the method further comprises reacting a phenol-based compound and the aldehyde compound in a presence of an acid catalyst to obtain the phenol novolak resin.

5. The method of claim 4 , wherein the phenol novolak resin includes the aldehyde compound in a content of 0.05 to 0.3 mol based on 1 mol of the phenol-based compound, and the aldehyde compound is used in a content of 2 to 6 mol, the allylamine is used in a content of 0.5 to 1.5 mol, and the diaminodiphenylmethane is used in a content of 0.1 to 0.9 mol based on 1 mol of the phenol novolak resin.

6. A hardened material prepared from the polybenzoxazine precursor of claim 1 .

7. A polybenzoxazine, obtained by opening an oxazine ring of a polybenzoxazine precursor according to claim 1 , to perform polymerization.

8. A method of preparing a polybenzoxazine, the method comprising:
hardening a polybenzoxazine precursor according to claim 1 at a temperature of 150 to 250° C.

9. The method of claim 4 , wherein the phenol novolak resin is represented by the following Chemical Formula 2 and a component of Chemical Formula 2 where n is 0 is included in a content of 65% or more:

wherein n is an integer of 0 to 2.

Assignees

• Kolon Inc

Inventors

• Cho Hee Jin
• Sung Do Kyung
• Park Ki Hyun
• Park Sang Hun

Classifications

• C08G2261/344

  containing heteroatoms · CPC title

• C08G2261/592

  against heat · CPC title

• C08G2261/65

  Electrical insulator · CPC title

• C08G61/122

  derived from five- or six-membered heterocyclic compounds, other than imides · CPC title

• C08K5/18

  with aromatically bound amino groups · CPC title