The sealing composition

 

(57) Abstract:

Describes a new sealing composition containing polysulfide oligomer, filler, manganese dioxide, plasticizer, stearic acid, Aerosil, diphenylguanidine and modifying additive. As modifying additives it contains unsaturated polyester resin obtained by polycondensation of a mixture of anhydride norbornenedicarboxylic acid and maleic or phthalic anhydride when a molar ratio of 4 : 6 with a mixture of ethylene or propylene glycol and diethylene glycol, when a molar ratio of 3 : 7, when the molar ratio of acid anhydrides and glycols 1 : 1, in the following ratio, wt.h.: polysulfide oligomer 100, the filler 83,43 - 142, manganese dioxide 6,2 - 10, plasticizer 7,19 - 15, stearic acid 0,13 - 0,7, Aerosil 0,55 - 4,34, diphenylguanidine 0,2 - 1,5 specified modifier additive of 0.5 - 5. The technical result - the increase adhesion of sealant on the basis of the proposed sealing compositions to glass and dural while maintaining the physical and mechanical properties. table 2.

The invention relates to compositions based on polysulfide oligomers (liquid tokalov) and can be used in Stroiteley oligomer, carbon black, vulcanizing agent is a mixture of dimethylaminomethylphenol and the vulcanization accelerator oligodendroglial in the following ratio, wt.h.:

polysulfide oligomer - 100

carbon - 30-50

oligodendroglial - 20-30

the mixture dimethylaminomethylphenol - 1 - 2,

(see RU Patent 2101316, class C 09 K 3/10, 1996).

A disadvantage of the known compositions is that it does not have sufficient adhesion to the glass and dural.

Closest to the technical essence is a sealing composition containing:

polysulfide oligomer;

the filler is carbon black;

manganese dioxide;

the plasticizer is dibutyl phthalate;

stearic acid;

Aerosil;

diphenylguanidine;

the modifying additive -,- Methacrylonitrile, in the following ratio, wt.h.:

polysulfide oligomer - 72-82

soot - 18-28

manganese dioxide - 4.999-6.666

dibutyl - 3.829-5.101

stearic acid - 0.02 - 0.028

Aerosil - 0.149-0.199

diphenylguanidine - 0.6-1.0

- methacrylate-bis-pentaerythrityl - 3.0 - 7.5,

(see USSR Author's certificate 584027, class C 09 J 3/12, C 09 K 3/10, 1976).

The disadvantage of this geodesie operational properties.

The objective of the invention is to improve the adhesion of the sealant on the basis of the proposed sealing compositions to glass and dural while maintaining the physical and mechanical properties.

The technical problem is solved in that the sealing composition containing polysulfide oligomer, filler, manganese dioxide, plasticizer, stearic acid, Aerosil, diphenylguanidine and modifying additive, as modifying additives it contains unsaturated polyester resin obtained by polycondensation of a mixture of anhydride norbornenedicarboxylic acid and maleic or phthalic anhydride when a molar ratio of 4:6 with a mixture of ethylene or propylene glycol and diethylene glycol, when a molar ratio of 3:7, when the molar ratio of acid anhydrides and glycols 1: 1, in the following ratio of the components of the composition, wt.h.:

polysulfide oligomer - 100

filler - 83.43-142

manganese dioxide - 6.2-10

plasticizer - 7.19 - 15

stearic acid - 0.13 - 0.7

Aerosil - 0.55 - 4.34

diphenylguanidine - 0.2 - 1.5

the specified modifier additive is 0.5 - 5

Technical solution allows to increase the adhesion to the dural and glass 2 times.

Characteristics of the (STF)

STF 38. 1503 97: colorless sedentary weight with onset temperature fluidity 45 - 50oC, odorless. Unsaturated polyester obtained by polycondensation of a mixture of anhydride norbornenedicarboxylic acid and maleic or phthalic anhydride when a molar ratio of 4:6 with a mixture of ethylene or propylene glycol and diethylene glycol at a temperature of 150-220oC and a residual pressure of 50 mm RT.article and a molar ratio of 3:7, when the molar ratio of acid anhydrides and glycols 1:1, respectively.

The ratio of the components and composition of the unsaturated polyester corresponds to the standard STP 38.1503-97.

The structural formula of an unsaturated polyester represented in the following form:

< / BR>
where n = 1-10, m = 1-12.

- polysulfide oligomer content of SH-groups from 2.6 to 4%, TU - 38.50309 - 93;

as the filler composition contains:

carbon black according to GOST 7885-86;

the titanium dioxide on THE-6-34-5762326-10-91;

kaolin according to GOST 19608-84;

Mel:

hydrophobic on THE other 21-020350-06-92;

precipitated by THE 6-18-11-78,

GOST 8253 - 79;

as the curing agent composition contains:

manganese dioxide according to GOST 4470-79

as the plasticizer composition is laceration on THE 6-01-16-90

- stearic acid according to GOST 6484-96

presented by GOST 14922-77, THE 6-18-222-76

- diphenylguanidine (guanin - f) according to GOST 40 - 80

THE 6-14-22-269-90

The invention is illustrated by the following specific examples:

Example 1.

In a porcelain mortar is placed, wt.h.:

polysulfide oligomer (liquid Thiokol) with integral SH-groups in the amount of 2.6% - 100

the filler is chalk hydrophobic - 80

carbon - 1,43

unsaturated polyester (when n is 10, m is 1) - 1

mix thoroughly, receive a sealing paste.

After thorough mixing, curing the paste, which contains, by weight.h.:

manganese dioxide - 6,2

carbon - 2,0

the plasticizer is dibutyl - 6,85,

polydiethyleneglycoladipinate - 0,34

stearic acid - 0,34

diphenylguanidine - 1

Aerosil - 4,34

introducing a sealing paste and again mix thoroughly.

Example 2.

In a porcelain mortar is placed, wt.h.:

polysulfide oligomer (liquid Thiokol) with integral SH-groups in the amount of 3.0% - 100

the filler is chalk hydrophobic - 140,

carbon - 1,63

Aerosil - 0,9

unsaturated politdateline mixing curing the paste, which contains, by weight.h.:

manganese dioxide - 8,13

plasticizer - chloroparaffin - 12,2

polydiethyleneglycoladipinate - 0,81

stearic acid - 0,4

diphenylguanidine - 1,22

Aerosil - 0,34

introducing a sealing paste and again mix thoroughly.

Example 3.

In a porcelain mortar is placed, wt. including:

polysulfide oligomer (liquid Thiokol) with integral SH-groups in the amount of 2.6% - 100

the filler is chalk hydrophobic - 110

kaolin - 20

titanium dioxide - 10

Aerosil - 1,5

unsaturated polyester (when n is 10, m is equal to 12) - 2,5

mix thoroughly, receive a sealing paste.

After thorough mixing, curing the paste, which contains, by weight.h.:

manganese dioxide - 10

carbon black - 2

plasticizer - chloroparaffin - 6,5,

dibutyl phthalate is 1.35,

polydiethyleneglycoladipinate - 1,3

stearic acid - 0,7

diphenylguanidine - 1,5

Aerosil - 0,34

introducing a sealing paste and again mix thoroughly.

Example 4.

In a porcelain mortar is placed, wt.h.:

polysulfide oligomer (liquid Thiokol) with integral SH-groups in the amount of 3.0% - 100

mix thoroughly, receive a sealing paste.

After thorough mixing, curing the paste, which contains, by weight.h.:

manganese dioxide - 7,5

the plasticizer is dibutyl - 7,5

polydiethyleneglycoladipinate - 0,5

stearic acid - 0.5

diphenylguanidine - 1,0

introducing a sealing paste and again mix thoroughly.

Example 5.

In a porcelain mortar is placed, wt.h.:

polysulfide oligomer (liquid Thiokol) with integral SH-groups in the amount of 4.0% - 100

the filler is chalk hydrophobic - 100,

titanium dioxide - 30

carbon - 0,32

Aerosil - 1,32

unsaturated polyester (when n is 1, m is equal to 12) - 2

mix thoroughly, receive a sealing paste.

After thorough mixing, curing the paste, which contains, by weight.h.:

manganese dioxide - 7,7

the plasticizer is dibutyl - 3,2

chloroparaffin - 6,4

polydiethyleneglycoladipinate - 0,2

stearic acid - 0,13

diphenylguanidine - 0,2

introducing a sealing paste and again mix thoroughly.

Example 6.

In a porcelain mortar is placed, wt.h.:

kaolin - 20

carbon - 1

Aerosil - 3

unsaturated polyester (when n is 4, m is equal to 11) - 0,5

mix thoroughly, receive a sealing paste.

After thorough mixing, curing the paste, which contains, by weight.h.:

manganese dioxide - 10

plasticizer - chloroparaffin - 14

polydiethyleneglycoladipinate - 1,0

stearic acid - 0.5

diphenylguanidine - 0,5

introducing a sealing paste and again mix thoroughly.

Data for examples 1-6 are shown in table 1.

For achieving uniform distribution of the components of the sealant composition is maintained at a temperature of 20oC for 7 days or at a temperature of 70oC within 24 hours.

Physico-mechanical properties determined in accordance with the specifications 2513 - 005 - 0015200 - 96 "Sealant TGS - 06", data are shown in table 2.

As can be seen from the examples of embodiment, the inventive sealing composition has a high adhesion to glass and duralumin, which is 2 times higher compared to the prototype. Moreover, the composition has a higher strength and hardness and lower viability, the last promotes of the hydrocarbon is filler, manganese dioxide, plasticizer, stearic acid, Aerosil, diphenylguanidine and modifying additive, characterized in that as modifying additives it contains unsaturated polyester resin obtained by polycondensation of a mixture of anhydride norbornenedicarboxylic acid and maleic or phthalic anhydride when a molar ratio of 4 : 6 with a mixture of ethylene or propylene glycol and diethylene glycol when a molar ratio of 3 : 7, when the molar ratio of acid anhydrides and glycols 1 : 1, in the following ratio, wt.h.:

Polysulfide oligomer - 100

Filler - 83,43 - 142

Manganese dioxide - 6,2 - 10

Plasticizer - 7,19 - 15

Stearic acid - 0,13 - 0,7

Aerosil - 0,55 - 4,34

Diphenylguanidine - 0,2 - 1,5

The specified modifier additive is 0.5 to 5

 

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