SU540894A1 - Epoxy composition - Google Patents

Description

Relative elongation,% 420 Residual elongation,% 1.0

Module at lengthening

kg / cm S, 0

Example 3. 2.6 g (100 inches) of PDI-ZAK, containing 2.54% of epoxy groups, are mixed at-room temperature with 0.35 g (13.5 hours) of SIG, containing 12, 75% of hydrazide groups and 0.004 g (0.14 volt) of topanol. Curing is carried out at 20 ° C for 7 days.

Properties of the resulting film: Tensile strength, kg / cm 27.4 Relative elongation,% 570

Residual elongation,% 10

Example 4. 3.3 g (100 in. h.) PDI-ZAK shift from 0.45 g (13.6 in. H.) JIU, containing 12.7%. Hydrazide groups (mol. 1000) in 0.005 g (0.14 in. H) topanol and cured at 1 hour.

Film properties;

Tensile strength, kg / cm 14.1 Relative elongation,% CTO

Residual elongation,% 20.0

Example 5. The comnose of example 4 is cured for 10 hours at 60 ° C. Film properties:

Tensile strength, kg / cm 19.2 Relative elongation,% 660 Residual elongation,% 20.0

Viability of compositions based on PDI-ZAK and JIU of various molecular weights for 36-48 hours.

Example 6. 0.39 g (54.5 in. H.) ED-5, containing 20.3% of epoxy groups, 0.33 g (45.5 h. H.) DEG-1, containing 24% of epoxy groups and 1.07. g (147.5 in. h.) JIU containing 12.7% of hydrazide -groups (mol. in. 1000) and 0.015 (1.5 in. h) of the topanol are mixed at 50 ° C and cured at 100 ° for one hour.

Film properties:

Tensile strength, kg / cm 30.6 Relative elongation,% 190

Residual elongation,% 3.0

Viability of the composition at 20 ° С5 days Glass transition temperature 55 ° С Example /. 0.35 g (74.5 in. H.) ED-5, 0.12, (25.5 in. H.) DEG-1 and 1.6 g (340 h. H.) JIU, containing 5, 22% of the hydrazide groups (mol. Century 2000) and 0.02 g (3.5 in. H) of topanol are mixed at 100 ° C and cured at 100 ° C for 5 hours. Film properties:

Tensile strength, kg / cm 20.8

Relative lengthening,% 270

Residual elongation,% 4.0

The viability of the composition at 20 ° C6 days. Example 8. 0.43 g (100 vol. Hours) of ED-5 containing 20.3% of epoxy groups are mixed at 70 ° C from 1.27 to g (295 in. h.) JIU containing 5.22% of hydrazide groups (mol. cent. 2000) and 0.015 g (3 in. h) of topanol and cured at 100 ° С 9 h.

Film properties:

Tensile strength, kg / cm 43.2 Relative elongation,% 180

Residual elongation,% 2.0

Example 9. 0.45 g (100 in. h.) ED-5 is shifted at 70 ° C from 1.22 g (270 S. h.) JIU, containing 5, 22% of hydrazide groups (mol-in 2000) and 0.015 g (3 in. h.) tonapola and cures at 100 ° C for 9 hours. Film properties:

Tensile strength,, 0

Relative lengthening,% 190

Residual elongation,% 2.0

Viability of KOiMnozitsiya with day

Example 10. 0.42 g (100 vol. H) ED-6, containing 27% of epoxy groups, is mixed at 120 ° C with 0.72 g (170 vol. H) of JIU, containing 7% of hydrazide groups (mol in. 1700) and 0.01 g (2 in. h.) 2,2-methylenebis- (4-methyl-6-g / Egbutylphenol) and cured at 120 ° C for 5 hours.

Film properties:

Tensile strength, kg / cm 54.3 Relative elongation,% 166

Module at 100% elongation,

kg / cm 43.0

Example I. 0.80 g (100 vol. H) ED-B is mixed at 70 ° C with 0.83 g (103 vol. H) JIU containing 12% hydrazide groups and 0.01 g (1.0 v. h) topanol is cured at 90 ° C for 10 hours.

Film properties:

Tensile strength, kg / cm 215

Relative lengthening,% 180

Residual elongation,% 25

Module at 100% elongation,.

kg / cm2192

Example 12. 0.2 g (100 in. h.) ED-5 is mixed at 100 ° C with 0.95 g (425 in. H.) JIU containing 2.87% hydrazide groups (mol. C. 4000) and 0.01 g (4.3 in. h.) 2,2-methylenebis- (4-methyl-6-Greg-butylphepol) and cured for 10 hours at 110 ° C.

Film properties:

Tensile strength, kg / cm 24.0 Relative elongation,% 340 Residual elongation,% 5.0

Module at 100% elongation,

kg / cm 15.4

Example 13. 0.54 g (100 vol. H) of EET-1 containing 26.2% of epoxy groups are mixed at 100 ° C with 0.62 g (115 vol. H) of JIU containing 12% of hydrazide groups ( mol. weight 1000) 0.01 g (1.56 V. h.) of topanol and cured at 100 ° C for 10 hours. Film properties:

Tensile strength, kg / cm 24

Relative lengthening,% 130

Residual elongation,% 1.0

Example 14. 0.28 g (100 cpm) epoxy

PU-640 resin containing 24.4% epoxy

groups shifted at 60 ° C 1.07 g (384 in. h)

JIU containing 5,22 hydrazide groups

(mol. weight 2000) 0.01 t (4 in. h.) of topanol and cure for 13 hours at.

Film properties:

Tensile strength, kg / cm 14.0 Relative elongation,% 160

Residual elongation,% 1.0

The viability of the composition is 5 days at 20 ° C.

Depending on the nature of the epoxy resin, the molecular weight of the dihydrazide and the ratio of the components, the strength properties of the vulcanizate are changed by the order: tensile strength from 20 to 200 kg / cm with a relative elongation of 160-600%.

The composition has a viability of 1 to 8 days (20 ° C).

The composition cures from 1 hour at 100-120 ° C to 7-8 days at 20 ° C.

The composition has a viscosity of 500 pz at 20 ° C and 50 pz at 50 ° C.

The cured composition has a low water absorption (0.3-1.0%), has good dielectric properties (tg6 0.007 at 20 ° C and a frequency of 10 Hz), has a low glass transition temperature (from -55 to -70 ° C).

The simplicity of obtaining a composition that is cured by cold and hot curing, high elasticity of a vulcanizate and a whole complex of positive physicochemical and physical characteristics is of undoubted interest for the practical use of the composition as a casting for sealing components and parts of electronic equipment.

Claims (1)

1. US Patent No. 2847395, cl. 161 - 185, publ. 1958 (prototype).