Coating compositions for paper

Details Coating compositions for paper Coating compositions for paper

2003-01-28

2004-08-03

Brunsman, David (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Heterocyclic

C106S150200, C106S154110, C106S154300, C106S155100, C106S155200, C106S209100, C106S213100, C106S214100, C106S214200, C106S271000, C106S287170, C106S287220, C106S287230, C106S287250, C106S287280, C162S172000, C162S174000, C162S175000, C162S158000

Reexamination Certificate

active

06770129

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to compositions for coating paper, hardboard, fiberboard, paperboard, and molded-pulp products.
SUMMARY OF THE INVENTION
The present invention relates to compositions for coating paper and related pulp-based products. The compositions of the invention are aqueous compositions, usually in the form of suspensions comprising at least one of the following: a clay, a starch, casein, a resin, and a wax, and containing one or more of a branched reaction product comprising the following reactants:
A) at least one compound of formula I
R
1
(X)
3
  (I)
 wherein each X group is a halogen atom or one X group is a halogen atom and two X groups represent an epoxy oxygen atom, which is attached to two adjacent carbon atoms in the R
1
group to form an epoxy group, and R
1
is an alkanetriyl group containing from 3 to 10 carbon atoms; and
B) at least one compound having the formula II
R
2
X(AO)
n
Y  (II)
 wherein R
2
is a substituted or unsubstituted, saturated or unsaturated, organic group having from 1 to 36 carbon atoms; X is —O—, —S—, or —NR
3
— where R
3
is hydrogen or a C
1
-C
18
alkyl group; each AO group is independently an ethyleneoxy, 1,2-propyleneoxy, or 1,2-butyleneoxy group, n is a number of from 0 to 200, preferably from 1 to 100, more preferably from 2 to 20; and Y is hydrogen, or Y can be a mercapto group or an amino group (amino or C
1
-C
6
alkylamino group) in place of a terminal —OH group, provided that when Y is mercapto or an amino group or a C
1
-C
6
alkylamino group, n is at least 1;
wherein the mole ratio of the linking compound A) to B) is from 0.1:1 to 5:1, preferably from 0.6:1 to 2:1, more preferably from 0.8:1 to 2:1 and most preferably from 0.8:1 to 1.5:1.
Paper coating compositions containing one or more of the above reaction products results in the minimization or elimination of fisheyes, excellent flow and leveling properties, and marked reduction or elimination of foam. In addition, coating open time is extended without affecting either wet strength of the paper or its gloss when dry.


REFERENCES:
patent: 5827453 (1998-10-01), Gross et al.
patent: 5895605 (1999-04-01), Gross et al.
patent: 6110977 (2000-08-01), Gross et al.
patent: 6387962 (2002-05-01), Wiggins et al.
patent: 6509395 (2003-01-01), Breindel et al.
patent: 6576736 (2003-06-01), Wiggins et al.
patent: 6583185 (2003-06-01), Wiggins et al.

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