JPS6085941A - Rubber-polyurethane composite body and manufacture thereof - 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 a method for applying sulfur on a layer of transparent, semi-transparent, or colored opaque polyurethane polymer on a release paper that is smooth or has an arbitrary uneven pattern as required. Crosslinked or I
A special fF invented by the present inventor consisting of rj peroxide crosslinkable natural rubber, synthetic rubber, and various vinyl monomers.
Coating and drying one layer of gono-graft polymer produced by J1 method (-6 composite film and unfoamed unvulcanized rubber or foamed unvulcanized gono) were simultaneously vulcanized. This book covers 74 articles, including polyurethane composites and their manufacturing methods.

Conventionally, when using the surface treatment method of vulcanization according to Patent No. 1045714 invented by 11 people for the above composition, L can also be dark blue. That is, the surface of vulcanized rubber or foamed vulcanized rubber is puffed, and a commercially available chloroprene rubber craft polymer for polyurethane bonding (e.g., Bonatite PC-70, Bonatite R, P-7no, manufactured by Kakue Gyo Co., Ltd.) is applied. Add an appropriate amount of polyisocyanate (for example, Desmodur RF manufactured by Bayer AG, West Germany).
(The adhesive is applied as a primer, and then an appropriate amount of polyisocyanate is added to a commercially available polyurethane adhesive, or an appropriate amount of polyisocyanate is added depending on the conditions. On the other hand, the polyurethane polymer layer is is a book in which two parts coated with a similar polyurethane adhesive are bonded together under heating, and this can be said to be a method already known to the public.

According to the present invention, unlike the above-mentioned known method, the above-mentioned rubber fist polyurethane composite is produced at the same time as the rubber vulcanization. The adhesive force between the rubber graft polymer layer and the intermediate layer, the surface of the gono graft polymer, and the vulcanized rubber layer is strong and maintains sufficient strength even at high vulcanization temperatures. That is, the mechanism of adhesion according to the present invention is that between the polyurethane layer on the release paper and the kraft rubber, there is a polar effect due to the vinyl group monads that are krafted into the rubber, and at least a slight difference between the polyurethane layer on the release paper and the kraft rubber. Solvent (7) ln1
By using the above DMF (demethyl formamide), the surface of the polyurethane layer is dissolved, and the distance between the respective molecules is brought closer. Furthermore, the intermolecular crosslinking effect due to the appropriate amount of isocyanate added is used. Conceivable. Furthermore, by adding an appropriate amount of a radical generator such as sulfur, tetraethyldiuram diarylphide (TF!T'), or vermegisito to the rubber graft polymer, it is possible to prevent The synergistic effect with the radicals migrating from the vulcanized rubber (improves the adhesion between the unvulcanized rubber and the graft rubber, the kraft rubber 2 polyurethane, and the cohesive force of the kraft rubber itself, and improves the cohesion of the polyurethane layer, the kraft rubber intermediate layer, It is thought that complete bonding between the 11 sulfur rubbers could be achieved.

Due to the chemical synergistic effect described above, the adhesion between the polyurethane layer, the rubber graft polymer, and the vulcanized rubber is strong, and an integral composite can be formed.

Especially in the case of 1 foam rubber, after vulcanization, 1% of the pressure release:
Of course, since the rubber part expands, it will be subjected to a large shearing force at the vulcanization temperature. Therefore, the adhesive strength between each layer is.

Sufficient chemical bonding is required to withstand these large deformations at high temperatures. The present invention has been able to exhibit sufficient adhesion to withstand these demands and satisfy the functionality of the composite.

The composite according to the present invention can generally be used as flooring and soles for footwear, but its use is not limited to two fathoms.

Example 1 The thickness of the dried film was 0.02 to 0.05 MMK on the surface of a release paper that was smooth or had an arbitrary uneven pattern.

A polyurethane solution of any one of Prescriptions 1 to 2 is applied and dried, and a rubber graft polymer solution of any one of Prescriptions 3 to 4 is applied onto this polyurethane film so that the dried film has a concentration of 0.01 to 0.03M.
Stack them so that they are W1 and dry them thoroughly. Next, the foaming unvulcanized rubber sheets of Formulation 5 are stacked so that no air remains in the film, and inserted into the mold on the hot platen of the vulcanizing press, pressurized, and cured. . Vulcanization conditions can be selected arbitrarily, but for example, complete vulcanization is performed at 135°C for 30 minutes, the contents are immediately taken out,
Complete chemical cleaning by removing the release paper
c: A rubber-polyurethane composite was obtained. in this case,
Since the foaming rate of the rubber affects the floatability of the polyurethane J@, it is preferable that the foaming rate is not larger than necessary.

Example 2 A non-foaming rubber fabric flavored with a foaming agent was used as a substitute for the foaming wooden sword 111A rubber fabric in Example 1, and 11 sulfurization was carried out simultaneously in the same manner as in Example 1. Comb polyurethane composite by chemical adhesion to TR(I).

In addition, LOL7III Example 1. In 2 and 2, the shape of the composite film on the h+L pattern side is not particularly limited, and it goes without saying that it can be of any size and shape.0 Prescription 1. Weight part bandex 'l'-51,0510100D 1o
.

MEK F) 0 Pigment 0.5 DM, F 100 MEK 50 Pigment 0.5 Prescription 3. Weight part Titanium oxide 30 Zinc leather No. 1 5 Calcium carbonate 100 ’1” E T L DMF 150 Desmojiur RF 35 Prescription 4. Heavy purple section Titanium oxide 50 Zinc leather No. 1 IO Calcium carbonate 100 Sulfur 0.5 Cumene hydroperoxide 1. ODMF 150 Desmojiur 几F 35 Prescription 5゜ Veil crepe 65 High styrene resin 25 SBR,1502In Vulcanization accelerator F 1.5 Non-staining anti-aging agent 1.0 Sulfur 2.3 1.) PT (foaming agent) 2.0 Zinc leather Fl, O Calcium silicate 25 Silica 25 Stearic acid 4 Parafine 1 Fiber aggregate powder 5

Claims (2)

[Claims] (1) Synergy between the transfer of crosslinking radicals generated during the crosslinking step during vulcanization of the rubber onto the surface of a rubber sheet such as non-foamed vulcanized rubber or foamed vulcanized rubber, and the radicals generated by the potentially added radical generating substance. A rubber graft polymer covering the sheet, which is firmly bonded by the effect, is used as an intermediate layer, and this intermediate layer 1
- A rubber/polyurethane composite consisting of three layers of colored polyurethane that are strongly chemically bonded to each other. (2) On a smooth release paper with an arbitrary uneven pattern [,
An outer skin layer made of one-color polyurethane is applied, and an appropriate amount of a polyisocyanate compound and a radical generator generated at the crosslinking temperature of the rubber are applied onto the outer skin layer. Apply multiple coats of gono-graft polymer containing at least 10% of the total solvent, DMF', pigment, and filler. After completing the chemical bonding between the two, two layers of 11JI layers were formed on the release paper with a skin urethane layer and a rubber graft layer, and on these two layers, a non-foamed unvulcanized rubber or a foamed unvulcanized rubber was formed. 2) Rubber/Bolly I/Tan composite characterized by simultaneously vulcanizing the sulfur rubber in a mold under pressure and heating to create a strong bond, and then peeling off the release paper. Manufacturing method 0