DE1294581B - Adhesive mixtures hardening in the absence of air - Google Patents

Description

1 2

To bond two materials, poly-. peroxide, tert-butyl hydroperoxide or methyl ethyl

merization glue, which consists of two components be "ketone peroxide in question.

are used. Some of the adhesive ends to be used according to the invention Solution contains the catalyst, while mixtures are dependent on one another Activator added to the other part or on 5 turn coming monomers and types and the surfaces to be bonded is applied. First amount of hydroperoxide for different lengths of time when the two components are combined, the storable occurs. Those in the examples below on curing a. Adhesive mixes run are from a few weeks

From the German Auslegeschrift 1109 891, it can be kept for up to many months.

known that as a one-component adhesive, which at xo you bring the mixture between the to flow effect is shelf stable and under air. adhesive surfaces, it hardens and performs a exclusion polymerized, only diacrylates produce excellent bonding. The hardening time or dimethacrylate of ethylene glycol, which can be determined by selecting the amount of accelerator and hy contain droperoxides, are suitable. affect the temperature in the desired sense.

It has now been found that mixtures of ¹ S can range from a few minutes to many

a) 20 to 100/0, based on the weight of hours. Naturally, the inventory

polymerizable compounds, of a mono- ^ tZt ^^^ tZtS ^

component a) mixed polymerizable monomeric J? _{,,,, D.} . , ....,. ., ..

Connect η ^{e next (} ien examples explain the invention

r. \ »;„ o ™ UvJtnnamwA ^a 5 and show the improvement in adhesive strength

c) a hydroperoxide compared to the adhesive mixtures according to the German

can be used for bonding metals. The interpretation document 1109 891.

Mixtures stay longer in the presence of air

Time unchanged and only harden under air - two ground steel plates (26 X 97 mm)

exclusion in contact with metals. 3 ° of an area of 7 cm ² glued by overlapping

These mixtures are in an excellent way and on a tearing machine parallel to the adhesive

for bonding metals to each other or with the surface torn apart,

other materials, e.g. glass. About- j

Surprisingly, the adhesive strengths achieved in Example 1 are better than when the known adhesive 35 is used

mixtures according to Auslegeschrift 1109 891. In glycol monomethacrylate, which contains 0.03% hy-

Suitable monoesters of acrylic and / or methaquinone monomethyl ether are stabilized

Acrylic acid in the context of the invention are, for. B. Ethylene 3.5% cumene hydroperoxide dissolved. This solution is

glycol, diethylene glycol, triethylene glycol or semi-filled polyethylene bottles for many months

Tetraethylene glycol monoacrylate or methacrylate so stable.

like the corresponding propylene glycol or butylene If a sample is placed between two steel plates,

glycol compounds, furthermore monoacrylates or something like that, it hardens after a few hours with room

Methacrylates of glycerine or erythritol. Besides the temperature. The achievable shear strength is

Monoglycol esters of acrylic and / or methacrylic 79 kg / cm ~ ² .

acid can contain up to 80% of a copolymerizable 45 With a corresponding approach based on tetra-

monoethylenically unsaturated compound, in particular ethylene glycol dimethacrylate, can be achieved under the

other acrylic or methacrylic acid esters, amides, nitriles, same conditions 26 kg / ~ ² shear strength,

also small amounts of the acid itself and styrene _ß . · Ι ₂

and other vinyl compounds are also used. ; e ι s ρ ι e

will. Crosslinking monomers, i. H. Mono- 59 In the Glykolmonometha- mentioned in Example 1

mers with at least two polymerizable double acrylate solutions become 10% chlorinated diphenyl

bindings, e.g. B. Divinylbenzene, Dimethacrylate or (chlorine content: ~ 50%) introduced. The storable

Allyl methacrylate, this mixture can be prepared in small quantities in the presence of air

be at work and bring about an improvement in the loss of several months. In the case of iron bonding with a

Resistance to solvents of the bonds. - Even 55 samples of the mixture achieve a shear strength

Polymers with a monomer or monomer ratio of 116 kg / cm """ ² ,

are mixed soluble or dispersed, such as. B. Poly- ". . . _

methyl methacrylate, can be used with. . example

Furthermore, the addition of chlorinated carbon instead of the cumene hydro-

hydrogen, phosphoric acid esters, plasticizers, 6o peroxyds is methyl ethyl ketone peroxide in one

such as di- and polyesters aliphatic or aro- amount of about 2% used. This solution is

matic di- and polycarboxylic acids, inorganic ones stable for many weeks. An iron bond with this one

Fillers such as titanium dioxide or chalk are possible. - Mixture gives a shear strength of 125 kg / cm " ³ .

It is also useful if the mixtures ". . _T.

Stabilizers that act in the presence of atmospheric oxygen 65 Example 4

stabilize, e.g. B. hydroquinone or di-tert-butyl- A mixture of glycol monomethacrylate and

p-cresol. chlorinated diphenyl in a ratio of 90:10, the

Examples of hydroperoxides include cumene hydro- containing 2% methyl ethyl ketone peroxide, is a few

Stable for weeks and provides steel bonds with a shear strength of 192 kg / cm " ² .

Example 5

A mixture of 90 parts of glycol monomethacrylate, 7 parts of methyl methacrylate and 3 parts of polymethyl methacrylate are stabilized with 0.01% hydroquinone and with 3 parts of tert-butyl hydroperoxide offset. The shelf life in the presence of air is a few months.

The shear strength achieved in the case of iron bonds is 80 kg / cm " ² .

Example 6

Glycerine monomethacrylate is stabilized with 0.01% hydroquinone and with 3% cumene hydroperoxide offset. The storage stability is a few weeks. The shear strength for iron bonds is 115 kg / cm -2.

Example 7 * °

Triethylene glycol monomethacrylate, stabilized with 0.01% hydroquinone, is mixed with 3% cumene hydroperoxide. The storage stability in the presence of air is a few months. Shear strengths of 145 kg / cm " ^{2 can be} achieved with steel bonds.

Example 8

Glycol monomethacrylate, which contains 10 parts of 1,4-butanediol dimethacrylate, is stabilized with 0.01% hydroquinone monomethyl ether. After adding 3% cumene hydroperoxide, a mixture is obtained which can be stored for several months in the presence of air. In the case of steel bonding, shear strengths of 60 kg / cmr ^{2 are obtained} .

Claims (1)

Claim: Using a mixture consisting of a) 20 to 100%, based on the weight of polymerizable compounds, one Monoacrylic and / or monomethacrylic acid ester of a polyhydric alcohol with a Carbon chain of 2 to 16 carbon atoms, interrupted by ether-oxygen atoms can be, b) optionally up to 80% of one which is copolymerizable with component a) monomeric compound, c) a hydroperoxide, for bonding metals.