Synthetic fiber treatment agent composition

Details Synthetic fiber treatment agent composition Synthetic fiber treatment agent composition

2001-04-16

2002-08-27

Dawson, Robert (Department: 1712)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C528S038000, C252S008610, C252S008630, C428S477400, C524S838000

Reexamination Certificate

active

06441105

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a synthetic fiber treatment agent composition, and in particular to a synthetic fiber treatment agent composition capable of providing synthetic fiber padding with better smoothness, repulsion, and the like.
BACKGROUND OF THE INVENTION
Polyester fibers or acrylic fibers have been used conventionally for the synthetic fibers of padding. Polyester fibers in particular have a higher compression modulus and better recovery than synthetic fibers such as nylon, polyvinyl chloride, or polypropylene, making them suitable for mattress padding, pillows, cushions, costume padding, and the like. Many silicone-based fiber treatment agents have thus far been proposed to provide such polyester and acrylic fibers with better smoothness and repulsion. Examples include a treatment agent comprising a high molecular weight polydimethylsiloxane and an amino group-containing alkoxysilane (JP Patent Application Publication No. Sho 51-37996), treatment agents based on an epoxy group-containing siloxane and an amino group-containing alkoxysilane (JP Patent Application Publication Nos. Sho 53-19715 and Sho 53-19716), a treatment agent comprising an amino group-containing siloxane, epoxy group-containing siloxane, and amino group-containing alkoxysilane (JP Patent Application Publication No. Sho 58-1231), and treatment agents based on an amino group-containing siloxane and an amino group-containing alkoxysilane (JP Patent Application Publication No. Sho 58-17310 and JP Patent Application Laying Open No. Hei 7-305278). However, such treatment agents require an alkoxysilane to be blended in as a component for providing smoothness, resulting in alcohol by-products from the alkoxysilane during treatment. Treatment agents in which methoxysilane has been blended, for example, result in methanol by-products, and run the risk of polluting the working environment and of causing explosions.
As a result of extensive research to overcome such drawbacks, the inventors perfected the present invention upon discovering the effectiveness of combining an amino group-containing polyorganosiloxane with a high amino group content and specific terminal groups, and an amino group-containing polydiorganosiloxane with a low amino group content or a polydiorganosiloxane with no amino groups.
An object of the present invention is to provide a synthetic fiber treatment agent composition capable of providing synthetic fibers, particularly synthetic fiber padding, with better hand, smoothness, repulsion, and the like.
SUMMARY OF THE INVENTION
The present invention is a synthetic fiber treatment agent composition comprising (A) an amino group-containing polyorganosiloxane, where the terminals of the molecular chain are groups described by general formula
where R is a C
1
to C
20
optionally substitutable monovalent hydrocarbon or hydroxyl group, with at least 80 mol % of all R comprising monovalent hydrocarbon groups; R
2
is a C
1
to C
10
divalent hydrocarbon group; R
3
and R
4
are hydrogen atoms or C
1
to C
20
optionally substitutable monovalent hydrocarbon groups; a is an integer from 0 to 5; p is an integer from 0 to 2; q is an integer from 0 to 3, and r is 0 or 1, where (p+q+r)=3, and at least 30 mol % of all siloxane units per molecule are amino group-containing diorganosiloxane units described by general formula
where R, R
2
, R
3
, R
4
, and a are the same as above and
(B) a polydiorganosiloxane described by general formula
where A is selected from a group consisting of trialkylsilyl, a hydrogen atom, and a C
1
to C
20
optionally substitutable monovalent hydrocarbon group; R, R
2
, R
3
, R
4
, and a are the same as above; x is an integer of 1 or more; and y is 0 or an integer of 1 or more, where y/(x+y) is no more than 0.1.
DESCRIPTION OF THE INVENTION
The present invention is a synthetic fiber treatment agent composition comprising (A) an amino group-containing polyorganosiloxane, where the terminals of the molecular chain are groups described by general formula
where R is a C
1
to C
20
optionally substitutable monovalent hydrocarbon or hydroxyl group, with at least 80 mol % of all R comprising monovalent hydrocarbon groups; R
2
is a C
1
to C
10
divalent hydrocarbon group; R
3
and R
4
are hydrogen atoms or C
1
to C
20
optionally substitutable monovalent hydrocarbon groups; a is an integer from 0 to 5; p is an integer from 0 to 2; q is an integer from 0 to 3, and r is 0 or 1, where (p+q+r)=3, and at least 30 mol % of all siloxane units per molecule are amino group-containing diorganosiloxane units described by general formula
where R, R
2
, R
3
, R
4
, and a are the same as above, and
(B) a polydiorganosiloxane described by general formula
where A is a trialkylsilyl group, a hydrogen atom, or a C
1
to C
20
optionally substitutable monovalent hydrocarbon group; R, R
2
, R
3
, R
4
, and a are the same as above; x is an integer of 1 or more; and y is 0 or an integer of 1 or more, where y/(x+y) is no more than 0.1.
The component (A) amino group-containing polyorganosiloxane is a component for providing synthetic fibers with better smoothness and repulsion. The polyorganosiloxane is characterized in that the terminals of the molecular chain are groups described by general formula
and at least 30 mol % of all siloxane units per molecule are amino group-containing diorganosiloxane units represented by general formula
In the formulas, R is a C
1
to C
20
optionally substitutable monovalent hydrocarbon or hydroxyl group, with at least 80 mol % of all R comprising monovalent hydrocarbon groups. Examples of monovalent hydrocarbon groups include saturated aliphatic hydrocarbon groups such as methyl, ethyl, propyl, butyl, octyl, decyl, dodecyl, and tetradecyl; unsaturated aliphatic hydrocarbon groups such as vinyl and allyl; saturated alicyclic groups such as cyclopentyl and cyclohexyl; aromatic hydrocarbon groups such as phenyl, tolyl, and naphthyl; and such groups where some of the hydrogen atoms have been substituted with organic groups containing epoxy groups, halogen atoms, or the like. R may be the same or different, but is preferably a methyl group. R
2
is a C
1
to C
10
divalent hydrocarbon group, such as alkylene, arylene, or alkenylene. R
2
is preferably an ethylene or propylene group. R
3
and R
4
are hydrogen atoms or C
1
to C
20
optionally substitutable monovalent hydrocarbon groups. Specific examples of monovalent hydrocarbon groups include the same groups as those given for R. R
3
and R
4
may be the same or different, but are preferably hydrogen atoms. The symbol a is an integer from 0 to 5, but is preferably 0 or 1. The symbol p is an integer from 0 to 2, q is an integer from 0 to 3, and r is 0 or 1, where (p+q+r)=3. The content of the aforementioned amino group-containing diorganosiloxane units are at least 30 mol % of the total siloxane units, preferably at least 50 mol %, and even more preferably at least 70 mol %. This is because the intended effects are less likely to be achieved when the proportion of amino group-containing diorganosiloxane units is less than 30 mol %. Examples of units other than the aforementioned amino group-containing diorganosiloxane units of this component forming the polyorganosiloxane include siloxane units represented by R
2
SiO
2/2
, RSiO
3/2
, R
4
—NH—(CH
2
CH
2
NR
3
)
a
-R
2
-SiO
3/2
, R
3
SiO
1/2
, and SiO
4/2
(where R, R
2
, R
3
, R
4
, and a are the same as above). The proportion of such siloxane units is limited only to the extent that the effects of the present invention are not compromised. The molecular structure of this component is preferably linear or linear with partial branches. The viscosity of component (A) at 25° C. is usually 10 to 100,000 mm
2
/s, and the degree of polymerization of linear polyorganosiloxanes is preferably within the range of 2 to 1000, and more preferably 10 to 500. An example of a method for producing component (A) is to add an excess amount of water to N-&bgr;-(aminoethyl)-&ggr;-aminopropylmethyldim

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