Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2001-08-16
2004-06-29
Zalukaeva, Tatyana (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S079000, C526S080000, C526S081000, C526S271000, C526S272000, C526S280000, C526S281000, C526S318200, C525S403000, C525S404000, C525S434000, C524S513000, C210S701000
Reexamination Certificate
active
06756460
ABSTRACT:
BACKGROUND OF THE INVENTION
A. Technical Field
The present invention relates to a novel water-soluble copolymer, and its production process and use.
B. Background Art
Water-soluble polymers are preferably used as detergent builders, pigment dispersants, and scale inhibitors. Examples thereof as well known conventionally includes (co)polymers of unsaturated carboxylic acids, such as acrylic acid, methacrylic acid, &agr;-hydroxyacrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, and citraconic acid.
Furthermore, the study of improving the (co)polymers is extensively carried out in recent years for the purpose of raising the performance for uses such as detergent builders, pigment dispersants, and scale inhibitors.
As to copolymers having particularly excellent improvement of performance, JP-B-68323/1992 discloses a binary copolymer of a specific unsaturated alcoholic monomer and a specific unsaturated carboxylic acid monomer.
However, it is not said that the above binary copolymer has still sufficient performance for uses, such as detergent builders, pigment dispersants, and scale inhibitors, and it is desired to raise the performance further.
In addition, detergent builders comprising the above conventional unsaturated carboxylic acid (co)polymer and its improved material as a base material could display comparatively high-level performance.
However, the detergent builders comprising the conventional unsaturated carboxylic acid (co)polymer have extremely bad compatibility with surfactants, therefore, there were disadvantages in that the detergent builder was not suitable for liquid detergent use.
SUMMARY OF THE INVENTION
A. Object of the Invention
Accordingly, an object of the present invention is to provide: a novel water-soluble copolymer which is still more excellent in performance for uses, such as detergent builders, pigment dispersants, and scale inhibitors.
In addition, another object of the present invention is to provide: a novel liquid detergent builder which has extremely excellent compatibility, high transparency when a liquid detergent composition comprises it, and very excellent detergency; and a novel liquid detergent composition comprising the liquid detergent builder.
B. Disclosure of the Invention
The present inventors diligently studied to solve the problems. As a result, they used two kinds of specific unsaturated carboxylic acid monomers, namely, used an unsaturated monocarboxylic acid monomer together with an unsaturated dicarboxylic acid monomer, and aimed at a novel trinary or quaternary or more water-soluble copolymer obtained by copolymerizing comonomers including these two kinds of unsaturated carboxylic acid monomers and a specific unsaturated alcoholic monomer. Then, they aimed at the residual amount of the raw monomers in this copolymer, and found that the copolymer can display still more excellent performance for uses, such as detergent builders, pigment dispersants, and scale inhibitors than conventional ones in case that the residual amounts of the unsaturated dicarboxylic acid monomer and the unsaturated alcoholic monomer are in the range of not more than predetermined levels. In addition, they found that the copolymer can display still more excellent performance for uses, such as detergent builders, pigment dispersants, and scale inhibitors than conventional ones in case that the clay dispersibility of the copolymer is not less than a predetermined level. The present invention was completed in this way.
The present inventors aimed at water-soluble copolymers obtained by copolymerizing comonomers including a specific unsaturated carboxylic acid monomer and a specific unsaturated alcoholic monomer. Then, they found that: the above object which could not be solved by the builder comprising the conventional unsaturated carboxylic acid (co)polymer can perfectly be solved by using the above specific water-soluble copolymers as liquid detergent builders. The present invention was completed in this way.
That is to say, a novel water-soluble copolymer, according to the present invention, is obtained by copolymerizing comonomers essentially including: an unsaturated monocarboxylic acid monomer (1) as represented by a general formula (1) below; an unsaturated dicarboxylic acid monomer (2a) as represented by a general formula (2a) below and/or an unsaturated dicarboxylic acid monomer (2b) as represented by a general formula (2b) below; and an unsaturated alcoholic monomer (3) as represented by a general formula (3) below,
with the copolymer being characterized in that: the residual amount of the unsaturated dicarboxylic acid monomer is not more than 8 weight %, and the residual amount of the unsaturated alcoholic monomer is not more than 45 weight %,
wherein the general formula (1) is:
where: A
1
, A
2
, and A
3
each independently represent a hydrogen atom or a methyl group; and X
1
represents a hydrogen atom, a monovalent metal, a divalent metal, an ammonium group, or an organic amine group;
wherein the general formula (2a) is:
where: A
4
and A
5
each independently represent a hydrogen atom, a methyl group, or —COOX
3
; A
6
represents a hydrogen atom, a methyl group, or —CH
2
COOX
4
; only any one of A
4
, A
5
, and A
6
is —COOX
3
or —CH
2
COOX
4
; and X
2
, X
3
, and X
4
each independently or together represent a hydrogen atom, a monovalent metal, a divalent metal, an ammonium group, or an organic amine group;
wherein the general formula (2b) is:
where: A
7
and A
8
each independently represent a hydrogen atom or a methyl group; and
wherein the general formula (3) is:
where: R
1
, R
2
and R
4
each independently represent a hydrogen atom or a methyl group, and R
1
(or R
4
) and R
2
are not simultaneously methyl groups; and R
3
represents —CH
2
—, —(CH
2
)
2
—, or —C(CH
3
)
2
—, and the total carbon atoms contained in R
1
, R
2
, R
3
and R
4
is 3; Y represents an alkylene group having 2 to 18 carbon atoms; and n is an integer of 1 to 300.
In addition, another novel water-soluble copolymer, according to the present invention, is obtained by copolymerizing comonomers essentially including: an unsaturated monocarboxylic acid monomer (1) as represented by a general formula (1) below; an unsaturated dicarboxylic acid monomer (2a) as represented by a general formula (2a) below and/or an unsaturated dicarboxylic acid monomer (2b) as represented by a general formula (2b) below; and an unsaturated alcoholic monomer (3) as represented by a general formula (3) below,
with the copolymer being characterized by having a clay dispersibility (50 ppm of calcium carbonate) of not less than 0.7,
wherein the general formula (1) is:
where: A
1
, A
2
, and A
3
each independently represent a hydrogen atom or a methyl group; and X
1
represents a hydrogen atom, a monovalent metal, a divalent metal, an ammonium group, or an organic amine group;
wherein the general formula (2a) is:
where: A
4
and A
5
each independently represent a hydrogen atom, a methyl group, or —COOX
3
; A
6
represents a hydrogen atom, a methyl group, or —CH
2
COOX
4
; only any one of A
4
, A
5
, and A
6
is —COOX
3
or —CH
2
COOX
4
; and X
2
, X
3
, and X
4
each independently or together represent a hydrogen atom, a monovalent metal, a divalent metal, an ammonium group, or an organic amine group;
wherein the general formula (2b) is:
where: A
7
and A
8
each independently represent a hydrogen atom or a methyl group; and
wherein the general formula (3) is:
where: R
1
, R
2
and R
4
each independently represent a hydrogen atom or a methyl group, and R
1
(or R
4
) and R
2
are not simultaneously methyl groups; and R
3
represents —CH
2
—, —(CH
2
)
2
—, or —C(CH
3
)
2
—, and the total carbon atoms contained in R
1
, R
2
, R
3
and R
4
is 3; Y represents an alkylene group having 2 to 18 carbon atoms; and n is an integer of 1 to 300.
In addition, a production process for a novel water-soluble copolymer essentially comprising: a constitutional unit (4) as represented by a general formula (4) below; a constitutional unit (5) as represented by a general formula (5) be
Fujii Yoshikazu
Nakamura Jun-ichi
Saeki Takuya
Takagi Masahito
Yamaguchi Shigeru
Nippon Shokubai Co. , Ltd.
Roylance Abrams Berdo & Goodman L.L.P.
Zalukaeva Tatyana
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