US 6,649,321 B2 · Styrene-anhydride copolymer containing amido group, the process for producing the same and use thereof

Abstract

The present invention relates to a novel styrene-anhydride copolymer containing amido group, which comprises the following repeating units (I) and (II): wherein R represents a residue of (meth)acrylate monomer containing hydroxyl group; R1 and R2 are the same or different and each represents a C1-6 alkyl group, or R1 and R2 are taken together with the nitrogen atom to which they attach to form a 5- to 6-member heterocyclic group containing nitrogen. The present invention also relates to process for producing the above copolymer and to the use of the copolymer as a photo resist in an alkaline soluble development of an irradiative reaction and as a solder resistant photo resist in printed circuit boards.

Claims15

Dependent claims

A styrene-anhydride copolymer containing amido group comprising the following repeating units (I) and (II):

wherein
R represents a residue of (meth)acrylate monomer containing hydroxyl group;
R1 and R2 are the same or different and each represent a C1-6 alkyl group, or R1 and R2 are taken together with the nitrogen atom to which they attach to form a 5- to 6-member heterocyclic group containing nitrogen.

A process for preparing the styrene-anhydride copolymer containing amido group, which comprises the steps of:

(a) reacting styrene-maleic anhydride copolymer having the following repeating unit (III):
with secondary amine in a solvent to allow the anhydride portion of styrene-maleic anhydride copolymer subjecting to partially ring-opening;
in which the secondary amine is used in an amount of 0.25 to 0.75 moles per mole of the styrene-maleic anhydride copolymer;
(b) reacting the resultant product with hydroxy-C1-6 alkyl (meth)acrylates to allow the ring-no opened anhydride portion subjecting to partially ring-opening;
wherein the hydroxy-C1-6 alkyl (meth)acrylates are used in an amount such that the total moles of the secondary amine used in the step (a) and of the hydroxy-C1-6 alkyl (meth)acrylates is equal to or less than the moles of the styrene-maleic anhydride copolymer.
13.The process according to claim 12, wherein the secondary amines are selected from the group consisting of dimethyl amine, diethyl amine, dipropyl amine, methylethyl amine, methylpropyl amine, dibutyl amine, ethylpropyl amine, dipentyl amine, dihexyl amine, ethylbutyl amine, pyrrolidine, pyrazolidine, imidazoline, oxazolidine, oxadiazoline, thiazoline, piperidine, piperazine, and morpholine.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/885,125Filed 21 Jun 2001

Published

US 2003/0022108 A130 Jan 2003

Granted

18 Nov 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

G03F 7/033
With binders: the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
C08F 8/32
Introducing nitrogen atoms or nitrogen-containing groups: by reaction with amines
Y10S 430/106
Radiation sensitive composition or product or process of making: binder containing
Y10S 430/107
Binder containing: polyamide or polyurethane

Styrene-anhydride copolymer containing amido group, the process for producing the same and use thereof

Life of this patent

Styrene-anhydride copolymer containing amido group, the process for producing the same and use thereof

Life of this patent

Abstract

Claims15