JPS5997566A - Inorganic elastic foam and manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides elastic foaming from an inorganic material based on gypsum using a hydrophilic urethane prepolymer and a resin emulsion, glass wool, and a surfactant that are less erodible to the inorganic material. It concerns the method of manufacturing the body. .

The resulting inorganic foam has a density of 0.10 to 0.35.

In general, plastics are often used as foams, such as urethane foam, polystyrene foam, polyethylene foam, phenol foam, and rubber foam, which are used in fields that take advantage of the characteristics of each type, and are also used as heat-resistant materials and reinforcement. materials, soundproofing materials, vibration-proofing materials,
It has a wide range of uses, including shock absorption, flotation, household goods, and payo material, and its actual applications are extremely diverse (4). However, the biggest drawback of these plastic foams is that they are easily flammable.

It is used for many purposes such as building materials, general housing insulation, wall materials, sound absorption and insulation for floors and ceilings, and combustion in fires etc., which are closely related to daily life such as vehicle width and automobiles. From the viewpoint of safety to prevent accidents such as heat and smoke generation, various foam materials are required to be made nonflammable.

In the past, much research has been carried out on flame retardant and non-combustible materials, and methods such as the use of flame retardant properties and methods of mixing inorganic powders have been investigated, but methods using organic materials as a matrix have not yet been developed. However, the objective has not been achieved.On the other hand, in the study of inorganic materials, there are many problems in terms of weight reduction, processability, and elasticity, and general-purpose practical application has not been achieved. The inventor of the present invention focused on this point and as a result of studies, he found a method that can provide practical flame retardant and noncombustible materials, as well as an industrial material that is lightweight, has excellent workability in practical applications, and has excellent anti-dust elasticity. Ta.

That is, 3 to 20 parts by weight of an inorganic material consisting of grout and gypsum is treated with a silane-based, titanium-based coupling agent, etc. as necessary, and then a hydrophilic urethane prepolymer and a resin emulsion are used as a binder, and a surfactant is used. Due to the foaming effect, gas is mixed in when water is added and stirred, and the density is 0.10 by maintaining the dispersed ft and curing.
-0°35 (Rin's inorganic foam) It is possible to obtain a foam that is flexible and has anti-slip properties.

Furthermore, no special equipment is required to obtain this foam. Further, foaming and curing are possible under normal pressure, there are no particular restrictions on the shape of the foam, and continuous sheet foaming, laminated foaming, etc., which do not cause deformation after curing, are also possible.

Furthermore, there are no pollution problems during their manufacture.

The substances constituting the present invention will be explained below.

Various kinds of glass fibers are produced, and any of long fibers, medium fibers, and short fibers may be used, and the present invention can use any of them, such as alkali-free glass fibers and alkali-containing glass fibers, and is not limited to these. do not have.

As for the stone stone used in the present invention, natural stone stone, chemical stone stone, combustion stone stone, dead stone stone, etc. can be used, but burnt stone stone, commonly known as hemihydrate stone, is preferable.

Other inorganic substances that can be used in the present invention are not particularly limited, but examples include clay, talc, aluminum hydroxide, magnesium hydroxide, basic carbonate, hydrated metal oxides such as magnesium, alumina, titania, etc. Examples include metal oxides, carbonates and bicarbonates such as calcium carbonate, magnesium carbonate, and sodium bicarbonate, borax, nocurium borate, calcium phosphate, potassium metaphosphate paste/acid, red mud, etc. .

The hydrophilic urethane prepolymer having an incyanate group at the end has a blending weight ratio of ethylene oxide and propylene oxide of 100:0 to 30:70, has a homogeneous molecular weight of 1,000 to 10,000, and is a government-funded product. I
Polyoxyalkylene polio with 〆group fi2-8, = S
This is a urethane prepolymer having isocyanate groups at the ends obtained by reacting isocyanates.

Incyanate is not particularly limited here, but examples include 1.
5 naphthene diisocyanate), 44' diphenylmethane diisocyanate), 44' diphenyldimethylmethane diisocyanate, di- and tetraalkyldiphenylmethane diisocyanate, 1.4 phenylene diisocyanate.

Examples include tolylene diisocyanate, xylylene diisocyanate, 16-hexane diisocyanate, chlorinated incyanates, and brominated incyanates. Further, the above prepolymer may be partially free of incyanate, and if necessary, solvents and plasticizers may be used in combination. These are the methods commonly used by those in charge of handling polyurethane metals. In addition, each of the four resin emulsions can be used as the resin emulsion, but
In order to obtain elasticity, rebound, and high expansion ratio, uretathene emulsions, synthetic rubber radix, and mixed emulsions thereof are preferred.

Regarding surfactants, there are anionic and nonionic types.

Both cationic and amphoteric types can be used.

In addition, if necessary, use a gypsum hardening accelerator, a material that has these effects, or a synthetic resin that has a hardening reaction. or,
The use of foaming agents, such as azodicarborazide, its sodium bicarbonate, ammonium carbonate, ammonium bicarbonate, calcium azide, Freon, carbon dioxide, etc., also includes physical methods.

Since a large amount of inorganic material is used in the present invention, the above-mentioned edge surface treating agents such as silane surface treating agents and titanate surface treating agents may be used to improve miscibility.

ψThe low-density, inorganic foam with excellent anti-dust elasticity and processability obtained by the present invention can be used not only as a substitute for easily combustible foams in the current market, but also in combination with other materials and composite technology. applied to new materials. example? Paper when crowned,
It can be applied to combinations with other materials, such as combinations with aluminum plates, steel plates, plastic films, etc., as well as combinations with non-woven fibers, glass foams, inorganic foams, etc., and laminates. .

The foam of the present invention thus obtained can be used for various purposes. Heat insulation covers for plants, packaging materials in sheet form, wall materials, interior materials, backing materials, cushioning materials,
Housing materials as other building materials.

The present invention is not limited to the above-mentioned usage and applications, as it is expected to be used in many fields such as automobile materials, vehicle materials, marine materials, and other general household electrical appliances. The present invention will be explained.

EXAMPLE Preparing a laboratory stirrer and dryer 45 parts of dihydrate gypsum (parts by weight are shown) and 5 parts of glass wool (short fibers) were weighed into a 500cc cup. Next, Obazoline 662Y (
(Surfactant) Add 32 parts of Toho Chemical Products. Synthetic rubber emulsion S B R: Yokohama Rubber 20chi 5oli
d) After adding 5 parts of 0H-1.5 parts (manufactured by Toho Chemical Co., Ltd.), 50 parts of water was added, and the mixture was stirred for about 18 seconds using a turbine stirrer so as to be uniform. After the whole became a creamy foam, the contents of the paper cog were put into a mold and aged at 60°C for 4 hours. No shrinkage was observed after taking it out, and the density was 0.18 Ky.
/rr? Met.

Similarly, the inorganic foam obtained by the present invention has excellent properties as shown in the following Examples, Comparative Examples, and Performance List.

Voluntary amendment to the procedure) January 22, 1980 Director of the Japan Patent Office Kazuo Wakasugi 1. Indication of the case 1982 Patent Application No. 204599 2. Title of the invention Inorganic elastic foam and its manufacturing method λ Person making the amendment Relationship to the incident Patent applicant address 1-Kakigara-cho, Nihonbashi, Chuo-ku, Tokyo (←9 Telephone (6
69) 3561 〒103, Contents of Amendment No. 5 of Detailed Description of the Invention (Sume GL 1st Edition ``Scope of Claims'' is amended as shown in the attached sheet.

(2) Page 3, line 3 [Insert 1/ctI after 0, 10-0, a s J.

(Correction: page 4, line 15 (Kf/m')'x(gea).

Attachment Claim 1: 1 to 70 parts by weight of a hydrophilic urethane prepolymer having an incyanate group at the end and 1 to 70 parts by weight of a resin emulsion
Parts by weight, 30 to 100 parts by weight of an inorganic substance, 0.2 to 5 parts by weight of a surfactant, and a hardened foam-containing composition obtained by adding and stirring water, with a density of o, io to 0.35 m Inorganic elastic foam and method for producing the same.

2. The urethane polymer according to claim 1 is a hydrophilic urethane prepolymer having an isocyanate group at the end thereof, and ethylene oxide dopropylene oxide is added thereto in a weight ratio of 100:0 to 30 nia. Average molecular weight in proportion and per hydroxyl group: 500 to 3,500
An inorganic elastic foam according to the claims, which uses a urethane polymer having an incyanate group at the end obtained by reacting a polyoxyalkylene polyol having 2 to 8 functional groups with an organic incyanate.

& Inorganic elasticity according to the claims, using a resin emulsion according to claim 1, which is a urethane emulsion, a synthetic rubber latex, or a blend of both, and has a resin content ratio of 10 to 70 foam.

Gypsum in which the total usage amount of the hydrophilic urethane prepolymer and resin emulsion having an incyanate group at the end as described in claim 1 is 1 to 70 parts by weight or more, or 3 to 20 parts by weight or less An inorganic elastic foam as claimed in the claims using glass wool.

a In the production of the inorganic elastic foam according to claim 1, 30 to 150 parts of water is added to 100 parts by weight of the foam raw material.
The inorganic elastic foam according to the claims, which is used in an amount of tL.

Claims (1)

[Scope of Claims] 1 to 70 parts by weight of a hydrophilic urethane prepolymer having an incyanate group at the end, 1 to 70 parts by weight of a resin emulsion, 30 to 100 parts by weight of an inorganic substance, and 0 parts by weight of a surfactant.
．． An inorganic elastic foam having a density of 0.1θ to 0.35 to 4/−, obtained by curing a foam-containing composition obtained by adding 2 to 5 parts by weight of water and stirring, and a method for producing the same. 2. The urethane prepolymer according to claim 1 is a hydrophilic urethane prepolymer having an incyanate group at the end thereof, and the urethane prepolymer contains ethylene oxide and propylene oxide in a weight ratio of 100:0 to 30 near 0. Claims using a urethane polymer having an incyanate group at the end obtained by reacting an organic incyanate with a polyoxyalkylene polyol having an average molecular weight per hydroxyl group of 500 to 500 and 2 to 8 functional groups. Inorganic elastic foam as described. & Inorganic elasticity according to the claims, using a resin emulsion according to claim 1, which is a urethane emulsion, a synthetic rubber latex, or a blend of both, and has a resin content of 10 to 70 Foam 4: An inorganic elastic foam in which the total amount of the hydrophilic urethane prepolymer having an incyanate group at the end and the resin emulsion according to claim 1 ranges from 1 to 70%. 5. The inorganic elastic foam as claimed in claim 1, wherein the inorganic material as claimed in claim 1 is gypsum with a weight of 50wc or more, or glass wool with a weight of 3 to 20%. a% In the production of the inorganic elastic foam according to claim 1, 30 to 150 parts of water is added to 100 parts by weight of the foam raw material.
The inorganic elastic foam described in the claims used in parts by weight