Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2001-02-27
2003-02-04
Cain, Edward J. (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C568S704000
Reexamination Certificate
active
06515050
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to novel diol compounds each having a comb-shaped structure, novel water-soluble polyurethane obtained using thereof, and usages of the water-soluble polyurethane.
The present invention also relates to an extruding auxiliary using the above novel water-soluble polyurethane, an extruding composition of a cement material containing the extruding auxiliary, and extruded articles of a cement material having improved strength obtained by extruding the above extruding composition of a cement material. The present invention further relates to a novel thickening agent for a mortar available for widely varying types of mortar such as repairing mortar, tile-bonding mortar, masonry mortar, spraying mortar, substrate mortar and topping mortar. The present invention further relates to a novel thickening agent for an underwater concrete and a composition for at underwater concrete containing the novel thickening agent for an underwater concrete. The present invention further relates to a novel ceramics forming binder. And the present invention further relates to a novel moisturizer for hair cosmetics excellent in moisture retention to hair.
2. Related Arts
When extruding a mortar comprising a cement, a fine aggregate, a fiber and water with a vacuum extruder or the like to produce cement plates extruding the same, in order to extrude the mortar without separating water therefrom, in other words, in order to impart water retention to the mortar, there has been a need to add a water-soluble polymer to the mortar (refer to, for example, Japanese Patent Publication No. 43-7134). In order to develop sufficient water retention, the aqueous mortar solution needs to have a high viscosity, and water-soluble cellulose ethers such as methyl cellulose (MC), hydroxypropyl methyl cellulose (HPMC) and hydroxyethyl cellulose (HEC) are mainly used as the water-soluble polymer at present.
In order to retain the shape of extruded articles immediately after extrusion, in other words, in order to impart shape retention to mortar, the mortar needs to exhibit excellent thixotropic properties; and, it was not sufficient to impart shape retention thereto by an addition of only the water-soluble polymer such as methyl cellulose to the mortar. Thus, asbestos has been used in combination with water-soluble cellulose ethers (refer to, for example, Japanese Patent Publication No. 43-7134).
So, in the conventional extrusion process, the requirements of water retention and shape retention of mortar in extruding mortar have been satisfied by the use of asbestos in combination with water-soluble cellulose ethers.
In recent years, however, the harmfulness of asbestos has been pointed out and restrictions have been imposed on its use. As a result, the fibers such as various types of polymer fibers and glass fibers have become in use as substitutes for asbestos. The mortar using these asbestos-substitute fibers is, however, inferior in shape retention to the mortar using asbestos. Thus, there have been demands for the development of novel extruding auxiliary capable of imparting water retention as well as sufficient shape retention to mortar with the use of asbestos-substitute fibers.
On the other hand, the water-soluble cellulose ethers have a problem that they are likely to trap bubbles when mixing mortar, and due to the bubbles, the strength of the extruded articles of the mortar is likely to decrease.
In addition, the water-soluble cellulose ethers are relatively expensive because they are semisynthetic polymers produced from special natural wood pulp as a raw material and boost the raw material costs of the extruded articles. Furthermore, the natural wood pulp as resources is limited. Thus, a novel extruding auxiliary has been desired which can be synthesized from less expensive industrial materials.
In the forming of ceramics, particularly in extrusion of ceramics, an extruding binder composed of a water-soluble polymer is blended so as to impart sufficient plasticity, tackiness and lubricating properties to the green sand, and various types of cellulose ethers such as methyl cellulose (MC) and hydroxypropyl methyl cellulose (HPMC) are widely used as the polymers.
The cellulose ethers, however, have a problem that their heat release in degreasing is rapid and the heat release value is high, therefore, the extruded articles are likely to be damaged at the time of degreasing. Furthermore, it is also a problem that carbonized residues or carbonized inorganic salts are likely to remain after degreasing (high carbon residue content).
Hair cosmetics such as hair conditioner, hair gel, hair foam, shampoo and rinse require moisturizer, which contains water-soluble polymer, so as to create moist feel. And, as the polymers for such cosmetics, water-soluble polymers such as polyethylene glycol (PEG) or various types of cellulose ethers are widely used at present.
However, for polyethylene glycol, it has a problem of creating a sticky hair impression, but not creating moist feel. At the same time, cellulose ethers such as hydroxyethyl cellulose (HEC) also have a problem of creating a stiffed hair impression, but not creating moist feel.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide novel diol compounds each having a comb-shaped structure and novel water-soluble polyurethane using thereof.
Another object of the present invention is to provide a novel extruding auxiliary as a replacement of water-soluble cellulose ethers, and which is more economical and is capable of imparting excellent shape retention to mortar, imparting excellent strength to the extruded articles of the mortar, and imparting improved formability to mortar. Still another object of the present invention is to provide an extruding composition of cement-based material which has excellent shape retention, of which extruded articles have excellent strength, and of which formability has been improved, and extruded articles of cement-based material of which strength has been improved.
Still another object of the present invention is to provide a novel mortar thickening agent which is available for widely varying types of mortar such as repairing mortar, tile-bonding mortar, masonry mortar, spraying mortar, bedding mortar and facing mortar.
Further object of the present invention is to provide a novel thickening agent for underwater concrete as a replacement of water-soluble cellulose ethers, and which is more economical and excellent in underwater anti-separating properties, and is improved retardation of setting.
Still further object of the present invention is to provide a novel ceramics forming binder to replace cellulose ethers whose heat release in degreasing is slow, heat release value is low, and carbon residue content is also low.
Yet another object of the present invention is to provide a novel moisturizer for a hair cosmetic as a replacement of PEG or cellulose ethers, and which imparts water retention to hair and creates excellent moist hair impression.
After concentrating our energies on solving the aforedescribed problems, we, the present inventors found that the above-described properties such as water retention and formability can be attained by improving the structure of comb-shaped diol as a raw material of water-soluble polyurethane, and on the basis of this acknowlegement we finally thought out the present invention.
Specifically, the present invention with which the above objects can be achieved is a comb-shaped diol represented by the following general formula (1):
wherein R
1
is a hydrocarbon group of 1 to 20 carbon atoms; each of R
2
and R
3
is a hydrocarbon group of 4 to 21 carbon atoms; some or all of the hydrogen atoms of the hydrocarbon groups R
1
, R
2
and R
3
may be substituted with fluorine, chlorine, bromine or iodine; R
2
and R
3
may be the same or different from each other; each of X, X′ and X″ is an alkylene group of 2 to 10 carbon atoms; X, X′and X″ may be the same or different from
Mitsuzuka Masahiko
Tsuruta Manabu
Wu Yunzhi
Cain Edward J.
Mitsui Chemicals Inc.
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