Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
1999-09-08
2001-12-25
Sellers, Robert E. L. (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C523S408000, C524S506000, C524S555000, C524S556000, C525S100000, C525S101000
Reexamination Certificate
active
06333368
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to a useful new curable resin composition for use in water based paints. In particular, it relates to a curable resin composition, of particular use in paints, which has excellent weather resistant properties, and furthermore provides excellent curability, and gives excellent resistance against solvents, chemicals and water. The primary constituents of this curable resin composition include; a water based product obtained by dispersing or dissolving in water, a tertiary amino vinyl polymer, or vinyl polymer containing both tertiary amino and acidic functionalities which has been neutralised by an acidic compound, or alternatively, an acidic vinyl polymer, or vinyl polymer containing both tertiary amino and acidic functionalities which has been neutralised by a basic compound, and a compound containing both epoxy and hydrolysable silyl functionalities.
2. Description of the Prior Art
Due to recent worldwide demand for increased environmental conservation measures and improvements in workplace conditions, it is becoming necessary to move away from current organic solvent based paints, to paints which release less organic solvent into the atmosphere. In addition, from an energy conservation point of view, paint resins which will cross link at room temperature would be most attractive.
In order to fulfil these requirements, aqueous emulsions of a copolymer formed from an unsaturated monomer of the ethylene family and a primary or secondary amino alkyl (meta) acrylate, with an epoxy silane coupling agent have been proposed (Japanese Patent Application, First Publication, No. Sho 61-28543), but the cured coating film from such compositions tends to be inferior in terms of its weather resistant properties.
Furthermore, water based adhesive compositions formed by combining an epoxy silane coupling reagent, with a water based polymer formed by emulsion polymerisation of a vinyl monomer containing either carboxyl or tertiary amino functionalities (U.S. Pat. No. 4,077,932), or alternatively water based coating compositions for use with paper or textiles (Japanese Patent Application, First Publication, No. Hei 1-96270) have also been proposed, but the surface obtained from such compositions, in all cases, is inferior, either in terms of water and solvent resistance, or in terms of surface appearance.
Moreover, alkali soluble adhesive compositions formed by combining a surface active agent and an epoxy silane coupling agent, with an aqueous solution of a carboxyl vinyl polymer, which is produced either by polymerisation of a single carboxyl vinyl monomer, or by copolymerisation of two or more different carboxyl vinyl monomers, have also been proposed (Japanese Patent Application, Unpublished, No. Hei 6-41504), but the surface formed from such compositions is inferior, particularly in terms of its resistance to water and alkalinity.
The limitation then, of the aforementioned water based resins of vinyl polymers containing either emulsifiers or surface active reagents is that the resultant surfaces inevitably lack resistance to water and other solvents.
SUMMARY OF THE INVENTION
In view of the above probems, it is an object of the present invention to provide a novel, and highly practical curable resin composition for use in water based paints, which contains no, or very little, organic solvent when compared with current organic solvent based paints, and which yields a cured film which has excellent weather resistant properties, as well as resistance to solvents, chemicals and water.
It is a further object of the invention to provide a novel, and highly practical curable resin composition for use in water based paints which will cross link at room temperature.
Accordingly the present invention gives a curable resin composition for use in water based paints comprising; a water based product (A) obtained by dispersing or dissolving in water, a tertiary amino vinyl polymer (I) which has been either partially or completely neutralised by an acidic compound, and a compound (B) containing both epoxy and hydrolysable silyl groups.
Moreover the present invention gives a curable resin composition for use in water based paints comprising; a water based product (C) obtained by dispersing or dissolving in water, a vinyl polymer (II) containing both tertiary amino and acidic functionalities to which has been added sufficient acidic compound so that the molar ratio of acidic functionalities in the added acidic compound to the tertiary amino functionalities in the vinyl polymer (II) is at least 0.1, and a compound (B) containing both epoxy and hydrolysable silyl functionalities. Herein the term molar ratio refers to an equivalence ratio, being the ratio of the equivalent numbers of the respective functionalities a compound (B) containing both epoxy and hydrolysable silyl groups.
Furthermore the present invention gives a curable resin composition for use in water based paints comprising; a water based product (D) obtained by dispersing or dissolving in water, a vinyl polymer (II) containing both tertiary amino and acidic functionalities to which has been added sufficient basic compound so that the molar ratio of basic functionalities in the added basic compound to acidic functionalities in the vinyl polymer (II) is at least 0.1, and a compound (B) containing both epoxy and hydrolysable silyl groups.
In addition the present invention gives a curable resin composition for use in water based paints comprising; a water based product (E) obtained by dispersing or dissolving in water, an acidic vinyl polymer (II) which has been partially, or completely, neutralised by a basic compound, and a compound (B) containing both epoxy and hydrolysable silyl groups.
Again the present invention gives a curable resin composition for use in water based paints comprising; a water based product (A) obtained by dispersing or dissolving in water, a tertiary amino vinyl polymer (I) which has been either partially or completely neutralised by an acidic compound, a compound (B) containing both epoxy and hydrolysable silyl functionalities, and a compound (F) containing a hydrolysable silyl group and/or a silanol group, but excluding the compound (B).
Again the present invention gives a curable resin composition for use in water based paints comprising; a water based product (C) obtained by dispersing or dissolving in water, a vinyl polymer (II) containing both tertiary amino and acidic groups to which has been added sufficient acidic compound so that the molar ratio of acidic groups in the added acidic compound to the tertiary amino groups in the vinyl polymer (II) is at least 0.1, a compound (B) containing both epoxy and hydrolysable silyl groups, and a compound (F) containing a hydrolysable silyl functionality and/or a silanol functionality, but excluding the compound (B).
Furthermore the present invention gives a curable resin composition for use in water based paints comprising; a water based product (D) obtained by dispersing or dissolving in water, a vinyl polymer (II) containing both tertiary amino and acidic groups to which has been added sufficient basic compound so that the molar ratio of basic groups in the added basic compound to acidic groups in the vinyl polymer (II) is at least 0.1, a compound (B) containing both epoxy and hydrolysable silyl groups, and a compound (F) containing a hydrolysable silyl functionality and/or a silanol functionality, but excluding the compound (B).
In addition the present invention gives a curable resin composition for use in water based paints comprising; a water based product (E) obtained by dispersing or dissolving in water, an acidic vinyl polymer (III) which has been partially or completely neutralised by a basic compound, a compound (B) containing both epoxy and hydrolysable silyl groups, and a compound (F) containing a hydrolysable silyl functionality and/or a silanol functionality, but excluding the compound (B).
Again the present invention gives a curable resin composition for use in water based paints comp
Harui Nobuo
Ooka Masataka
Armstrong Westerman Hattori McLeland & Naughton LLP
Dainippon Ink & Chemicals Inc.
Sellers Robert E. L.
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