SU757574A1 - Glue for adhesive tapes - Google Patents

Description

The invention relates to the field of production of pressure sensitive polymer adhesives based on butyl acrylate elastomer for sticky films on substrates of acrylonitrile butadiene styrene-polyvinyl chloride compositions (ABS-PVC films) and other film materials.

ten

Glue can be used for decorative lining of the interior of cars, vanogs, airplanes and other objects.

Known adhesive [Ϊ], containing 15 copolymer of alkylacrylate and ethylenically unsaturated carboxylic acid.

However, this adhesive has a low resistance.

The closest to the technical essence and the resulting positive effect to the invention is an adhesive containing butyl acrylate rubber, polyisobutylene / plasticizer, tack agent (adhesive 25 additive 'and solvent) [2].

However, this glue has insufficient water resistance at elevated temperatures and high fluidity.

The purpose of the invention is to increase the water resistance and bonding strength with prolonged exposure to elevated temperatures.

This is achieved in that the adhesive for adhesive tapes, containing copolymer of butyl acrylate with acrylic acid nitrile, adhesive additive, plasticizer and solvent, additionally contains polyethylene wax and the product of cohydrolysis of phenyltrichlorosilane with dimethyldichlorosilane in a ratio of 1: 2-5 with the following component ratios, wt.% :

Butyl acrylate copolymer with acrylic acid nitrile Adhesive additive

Plasticizer

Polyethylene

wax

The product of cohydrolysis of phenyltrichlorosilane with dimethyldichlorosilane Solvent

7.9-14.8

10.7-16.5

7.5-13.1

0.2-1.2

0.8-1.6

Rest

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As butyl acrylate rubber, a copolymer of butyl acrylate with acrylic acid nitrile with an acrylonitrile content of 10-20% was used.

As an adhesive additive, rosin and its derivatives, polyterpene resins, p-tert-butyl formaldehyde resin or their mixtures are used,

Chlorinated paraffins, orthophthalic or phosphoric esters, or mixtures thereof are preferably used as a plasticizer. As a polyethylene wax, low molecular weight polyethylene is used with mol.v. 200-600.

The product of cohydrolphenyltrichloro-: silane with dimethyldichlorosilane is K-47, K-60 silicone resins.

As a solvent, use a mixture of gasoline-ethyl acetate in a ratio of from 2: 1 to 5: 1.

Glue is prepared according to the following technology.

Crushed acrylic elastomer and blend are loaded into the glue mixer.

gasoline and ethyl acetate and stirred ν until smooth, after

which load the adhesive additive, plasticizer, silicone. resin and plyethylene wax. Stirring in the glue mixer is carried out until the glue is completely homogenized. Glue, is a homogeneous solution of brown color with a viscosity according to VZ-4 for 120-160 seconds.

The viability of the adhesive is at least 6 months.

The table below lists the compositions and properties of the adhesive in comparison with the prototype.

Testing of the adhesive is carried out after applying it on the ABS-PVC substrate and drying it for 8-10 minutes at a temperature of VO-EO ^ C. Aging tape for 24 hours at room temperature.

ί Glue can be used for ^: obtaining adhesive tapes based on ABS-PVC films used in the automotive industry. ^four

Name - Prototype Controls The proposed composition components measures and properties one 2 3 one 2 3 Low molecular weight polyeobutylene 1.5 High molecular weight polygamide 1.0 - - - - - Copolymer of butyl acrylate and acrylic acid nitrile 3.3 12.0 12.0 12.0 7.9 4.8 / 12.0 Glycerol ester of rosin 4.5 5.0 5.0 oh oh 5.7 4.5 Butylphenol formal 10.7 3.8 5.0 7.0 dehydric resin ^- g 6,> Polyterpenic resin - - 5.7 2.2 2.7 3.8 3.5 Tributyl phosphate 2.1 - - - - - - Chlorine Paraff - · 8.0 11.0 - 6.0 9.6 8.0 Dioctyl phthalate - 3.0 - eleven 1.5 3.5 3.0 Polyethylene waxes with mol.v. 200-600 0.5 - 0.2 1, .2 0.5 Silicone. kaya resin K-47 - - - - 0.8 1.1 Silicone resin K-60 1.2 - - - 1.6 -

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Component Name and Properties

Prototype

'Table continuation

Test cases The proposed composition ^! one 2 3 one 2 3

Toluene

20.0

A mixture of benzene ethyl acetate

67.6 Else

Rest

Properties

1. Peeling resistance at 20 ± 2 ° С after 72 hours, kgf / 5 cm

a> stainless steel

2. 'Peeling resistance, kgf / 5 cm, after keeping the samples in water for 48 hours at a temperature of 5012 * 0, from:

a) stainless steel b} aluminum

3. Resistance to peeling, kgf / 5 cm, after holding the samples for 7 days, at a temperature of 70® С from:

a) stainless steel

b) aluminum

1.23

1.1

0.8

1.05

0.95

1.03

3.08 2.26 1.21 2.28 1.03 1.11

2.67 2.32 .1.53 2.59 2.12 1.08

2.63 1.64 0.56 2.58 1.36 0.81

3.68 4.0 4.23

3.43 3.56 .3.98

3.15 3.62 3.81

3.10 3.67 3.72

'3.25 3.63 3.79

3.12 3.53 3.61

Claims (1)

Claim Adhesive for adhesive tapes containing copolymer of butyl acrylate with acrylic acid nitrile, adhesive additive, plasticizer and solvent, characterized in that, in order to improve water resistance and adhesion strength with prolonged exposure to elevated temperatures, it additionally contains polyethylene wax and dimethyl dichloro chlorofluorosilane / dimethyl dichloro chlorofluorosilane dimethyl dichloromethyl chloro chlorofluoromethylchloride, dimethyl dichloromethyl chlorofluoromethylchloride 1: 2-5 with a low ratio of components, wt.%: ._ Butyl acrylate copolymer with acrylic acid nitrile Adhesive additive 60 ka Plasticizer Polyethylene wax The product of hydrolysis phenyltrichlor 7.9-14.8 10.7-16.5 7.5-13.1 0.2-1.2 7 757574 eight silane with dimethyldichlarsilane 0,8-1,6 Solvent Remaining