CN103497715A

CN103497715A - Strong glue

Info

Publication number: CN103497715A
Application number: CN201310381183.1A
Authority: CN
Inventors: 周义云
Original assignee: NANJING HEMU NEW MATERIAL SCIENCE & TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: NANJING HEMU NEW MATERIAL SCIENCE & TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2013-08-28
Filing date: 2013-08-28
Publication date: 2014-01-08
Anticipated expiration: 2033-08-28
Also published as: CN103497715B

Abstract

The present invention belongs to the field of industrial glues, and particularly relates to a strong glue mainly comprising the following raw materials: by weight, 30-45 parts of formaldehyde, 15-25 parts of urea, 2-5 parts of polyvinyl alcohol, 35-60 parts of distilled water, 15-25 parts of a formaldehyde removing agent, 1-3 parts of sodium hydroxide, 1-2 parts of hydrochloric acid and 0.5-1 part of a mould inhibitor. The strong glue is safe, environmentally friendly, simple in production process, low in cost and strong in adhesive fastness, has high temperature resistance and good ageing resistance, is non-corrosive, rapid in adhesion and non-stripping, and can be commonly used in industry, construction, decoration, electronics and electronic appliances, automobile manufacturing, shipbuilding, instruments, machinery, transportation, light textiles, shoemaking, printing, locomotives, vehicles, household electrical appliances, motor manufacturing and other fields.

Description

A kind of super glue

Technical field

The invention belongs to industrial glue field, be specifically related to a kind of super glue.

Background technology

Glue has been one of main raw of decoration industry now, and its quality directly has influence on the decoration quality, and glue requires larger to raw-material consumption now, and free formaldehyde content is high, not environmental protection, can not more bonding differing materials, adhesive speed is slow, is corrosive.

Summary of the invention

For addressing the above problem, the invention discloses a kind of super glue, firmness is strong, high temperature resistant, ageing-resistant performance is good, does not corrode, bonding rapidly, do not come off.

For achieving the above object, technical scheme of the present invention is as follows:

A kind of super glue is mainly to be closed and formed by the following raw materials in parts by weight array:

Formaldehyde: 30-45 part, urea: 15-25 part, polyvinyl alcohol: 2-5 part, distilled water: 35-60 part, formaldehyde scavenger: 15-25 part, sodium hydroxide: 1-3 part, hydrochloric acid 1-2 part, mould inhibitor 0.5-1 part.

In order to improve the glue service efficiency, can in glue, add the 3-10% toughener, toughener is aqueous acrylic emulsion or polyurethane dispersing liquid

Beneficial effect is:

1, cost is low.Amount of urea of the present invention is little, than common glue, saves approximately nearly 12% urea.

2. environmental protection.The glue free formaldehyde content of making by this product is very low, in the glue process, just there is no peculiar smell.After plastic, the toxicity of product is little, also little to people's harm.

3. production technique is simple.Formaldehyde and urea are all disposable feeding intake, and produce early stage even without regulating pH value, very easily operation.

4, excellent property: the materials such as aluminium, steel, engineering plastics, timber, rubber, leather, fabric, paper, pottery, cement, felt, sponge, synthetic glass are all had to good bonding force; But 230 ℃ of heatproofs, do not corrode, bonding rapidly, do not come off, be common to the fields such as industry, building, decoration, electronic apparatus, automobile making, shipbuilding instrument, machinery, traffic, light textile, shoemaking, printing, rolling stock, household electrical appliances, motor manufacture.

Embodiment

Below in conjunction with specific embodiment, the present invention is specifically described.

Embodiment 1:

The described a kind of super glue of the present embodiment is mainly to be closed and formed by the following raw materials in parts by weight array:

Formaldehyde: 35 parts, urea: 18 parts, polyvinyl alcohol: 4 parts, distilled water: 50 parts, formaldehyde scavenger: 22 parts, sodium hydroxide: 2 parts, 1 part of hydrochloric acid, 0.5 part of mould inhibitor.

The described a kind of super glue of the present embodiment, concrete preparation method comprises the following steps:

1, formaldehyde scavenger is joined to reactor, the water that adds equivalent weight stirs 3 minutes;

2, add 34% formaldehyde in reactor, polyvinyl alcohol and water, stir 4 minutes, in whipping process, divides urea 3 times and add;

3, solution in reactor is warmed to 96 ℃, stops heating, react 160 minutes;

4, cool to 72 ℃, add hydrochloric acid, make the solution pH value reach 4.5-5, place 3 minutes;

5, when solution starts to volatilize, add sodium hydroxide, make the solution pH value reach 7.6, react 30 minutes;

6, reaction naturally cools to 50 ℃ after finishing, and adds mould inhibitor; 7, sampling and testing viscosity, pH value, solid content, all qualified after, barrelling, weighing.

After testing,

Figure 2013103811831100002DEST_PATH_IMAGE002

The described a kind of super glue of the present embodiment, concrete using method is as follows:

1, adhesive surface is wiped to cleaning, dry and comfortable.

2, please glue evenly is coated with and scrapes in sticky thing surface, the most handy band tooth is coated with the painting of plastics scraping blade and scrapes;

3, stopping cool putting after tack-free after 6 minutes after gluing closes up, exerts pressure.Surface drying time: 40 minutes.Exert pressure the time: 25 minutes.The de-pressure time: 20 ℃ of summers or above 2-3 hour; 20 ℃ of winters or following 4-5 hour;

4, in gluing, the secondary operation of exerting pressure, in surface drying time, complete.

In order to improve the glue service efficiency, can in glue, add toughener, this toughener, when keeping the various performance of original glue, also improves glue water conservation, thickening, tackifying, this toughener environment-protecting asepsis, tasteless.

Detailed directions is as follows: 1, get 14 parts of cold water, add 1 part of toughener stand-by after stirring.

2, get 150 parts, glue, add after stirring in toughener glue, stir and can use.

Described toughener is polyurethane dispersing liquid.

Embodiment 2:

42 parts, formaldehyde, 23 parts, urea, 4 parts of polyvinyl alcohol, distilled water: 55 parts, formaldehyde scavenger: 24 parts, sodium hydroxide: 3 parts, 2 parts of hydrochloric acid, 0.5 part of mould inhibitor.

The described a kind of super glue of the present embodiment, concrete preparation method, comprise the following steps.

1, formaldehyde scavenger is joined to reactor, the water that adds equivalent weight stirs 4 minutes;

2, add 35% formaldehyde in reactor, polyvinyl alcohol and water, stir 5 minutes, in whipping process, divides urea 4 times and add;

3, solution in reactor is warmed to 80-100 ℃, stops heating, react 170 minutes;

4, cool to 73 ℃, add hydrochloric acid, make the solution pH value reach 4.8, place 2 minutes;

5, when solution starts to volatilize, add sodium hydroxide, make the solution pH value reach 7.4, react 36 minutes;

6, reaction naturally cools to 44 ℃ after finishing, and adds mould inhibitor; 7, sampling and testing viscosity, pH value, solid content, all qualified after, barrelling, weighing.

Figure 2013103811831100002DEST_PATH_IMAGE004

1. guarantee the adhesive surface cleaning, dry and comfortable.

2. for guaranteeing bonding strength, please glue evenly is coated with and scrapes in sticky thing surface, be coated with the plastics scraping blade with the band tooth relatively good;

3. will stop cool putting after tack-free after 8 minutes after gluing closes up, exerts pressure.Surface drying time: 37 minutes.Exert pressure the time: 26 minutes.The de-pressure time: 20 ℃ of summers or above 2-3 hour; 20 ℃ of winters or following 4-5 hour.

4. in gluing, the secondary operation of exerting pressure, in surface drying time, complete.

Usage is as follows: 1, get 12 parts of cold water, add 2 parts of tougheners stand-by after stirring.

2, get 155 parts, glue, add after stirring in toughener glue, stir and can use.

Described toughener is aqueous acrylic emulsion.

Claims

1. a super glue is characterized in that: be mainly to be closed and formed by the following raw materials in parts by weight array:

2. a kind of super glue according to claim 1 is characterized in that: be mainly to be closed and formed by the following raw materials in parts by weight array:

Formaldehyde: 35 parts, urea: 18 parts, polyvinyl alcohol: 4 parts, distilled water: 50 parts, the formaldehyde reaction agent: 22 parts, sodium hydroxide: 2 parts, 1 part of hydrochloric acid, 0.5 part of mould inhibitor.

3. a kind of super glue according to claim 1, it is characterized in that: described formaldehyde scavenger is aniline.

4. a kind of super glue according to claim 1, is characterized in that: also comprise 1-2 part toughener.

5. a kind of super glue according to claim 4, it is characterized in that: described toughener is aqueous acrylic emulsion or polyurethane dispersing liquid.

6. the preparation method of a super glue, is characterized in that, comprises the following steps:

(1) water that, formaldehyde scavenger is joined to reactor, adds equivalent weight stirs 1-5 minute;

(2), in reactor, add 30%-40% formaldehyde, polyvinyl alcohol and water, stir 2-5 minute, in whipping process, divides urea 3-4 time and add;

(3), solution in reactor is warmed to 80-100 ℃, stop heating, reaction 90-180 minute;

(4), cool to 70-79 ℃, add hydrochloric acid, make the solution pH value reach 4.5-5, place 1-3 minute;

(5), when solution starts to volatilize, add sodium hydroxide, make the solution pH value reach 7.5 ± 0.2, the reaction 30-40 minute;

(6), reaction naturally cools to 40-50 ℃ after finishing, and adds mould inhibitor; (7), sampling and testing viscosity, pH value, solid content, all qualified after, barrelling, weighing.

7. the preparation method of a kind of super glue according to claim 6, is characterized in that: the hydrochloric acid soln that the hydrochloric acid in described step (4) is 20%.

8. the preparation method of a kind of super glue according to claim 6, is characterized in that: the sodium hydroxide solution that the sodium hydroxide in described step (5) is 35%.

9. the preparation method of a kind of super glue according to claim 6 is characterized in that: the step of mixing that also includes toughener:

(8), get 10-20 part cold water, add toughener 1-2 part stand-by after stirring;

(9), get glue 150-180 part, add toughener glue after stirring, stir and get final product.