CN104559833A - Quick-dry starch adhesive - Google Patents

Abstract

An embodiment of the invention discloses a quick-dry starch adhesive which comprises components in percentage by mass as follows: 13%-17% of corn starch, 5%-8% of a 30% sodium hydroxide solution, 1.5%-3% of a 30% hydrogen peroxide solution, 0.2%-0.8% of borax, 0.5%-2% of urea, 1.2%-4.8% of a drier and the balance of water. The performance of the starch adhesive can be improved effectively, and the drying speed of the starch adhesive is close to that of sodium silicate when the starch adhesive is used as a carton adhesive.

Description

Fast-drying type starch adhesive

Technical field

The present invention relates to chemical field, particularly relate to a kind of manufacture of fast-drying type starch adhesive.

Background technology

Starch is by glucose unit with the form of α-glucosides, and a kind of irreducibility polyhydroxy substance be combined into by Isosorbide-5-Nitrae, molecular formula is C ₆h ₁₀o ₅, be the white powder of no color or smell, starch and hydrolyzate glucose thereof are also important industrial raw material, and can produce the organic compound such as alcohol, aldehyde, ketone, acid, ester and ether, wherein many is important industrial chemicals.

Starch resource enriches, and low price, easy to use, available other materials carries out modification again.By the source of post kind, starch can be divided into W-Gum, potato starch, tapioca (flour), sweet potato starch, Starch rice etc., and their form, composition, granular size, the polymerization degree and gelatinization point are all different.Starch is mainly made up of amylose starch and amylopectin two portions.Amylose starch is linear structure, and in starch, content is about 10% ~ 30%, and energy is water-soluble and do not become pasty state, meets iodine in blue.Amylopectin is highly branched, insoluble in cold water, and expanding with hot water effect pool forms pasty state, and meeting iodine is red-purple.

Summary of the invention

Embodiment of the present invention technical problem to be solved is, provides a kind of fast-drying type starch adhesive, comprises following component in mass ratio:

W-Gum 13% ~ 17%

Sodium hydroxide (30% solution) 5% ~ 8%

Hydrogen peroxide (30% solution) 1.5% ~ 3%

Borax 0.2% ~ 0.8%

Urea 0. 5% ~ 2%

Siccative 1.2% ~ 4.8%

Water adds to 100%.

In order to solve the problems of the technologies described above, embodiments provide a kind of technique preparing described fast-drying type starch adhesive, comprising the following steps:

A () first adds water and W-Gum in the reactor of belt stirrer;

B () is stirred and is made water mix post-heating to 50 ~ 80 DEG C completely with starch;

C () adds appropriate sodium hydroxide solution, the pH value of solution is adjusted to 9.5 ~ 10;

D () adds the hydrogen peroxide that formula ratio is 1/2 while continuing to stir, react 30 minutes;

E () adds residual hydrogen sodium hydroxide solution, make starch pasting;

F () adds the borax that dissolved in advance and urea Keep agitation 30 minutes;

G () adds siccative and fully stirs evenly obtained finished product.

Implement the present invention, there is following beneficial effect:

The present invention effectively can improve the performance of starch adhesive, and when being used as carton adhesive, its rate of drying is close to sodium silicate.

Embodiment

For making the object, technical solutions and advantages of the present invention clearly, below the present invention is described in further detail.

Embodiment

W-Gum 15g

Sodium hydroxide (30% solution) 6g

Hydrogen peroxide (30% solution) 2g

Borax 0.8g

Urea 1.1g

Siccative 3.1g

Water adds to 100%.

Water and W-Gum is first added in the reactor of belt stirrer;

Stirring makes water mix post-heating to 50 ~ 80 DEG C completely with starch;

Add appropriate sodium hydroxide solution, the pH value of solution is adjusted to 9.5 ~ 10;

Add the hydrogen peroxide that formula ratio is 1/2 while continuing to stir, react 30 minutes;

Add residual hydrogen sodium hydroxide solution, make starch pasting;

Add the borax that dissolved in advance and urea Keep agitation 30 minutes;

Add siccative and fully stir evenly obtained finished product.

Above disclosedly be only a kind of preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.

Claims (2)

1. a fast-drying type starch adhesive, is characterized in that, comprises following component in mass ratio:

W-Gum 13% ~ 17%

Sodium hydroxide (30% solution) 5% ~ 8%

Hydrogen peroxide (30% solution) 1.5% ~ 3%

Borax 0.2% ~ 0.8%

Urea 0. 5% ~ 2%

Siccative 1.2% ~ 4.8%

Water adds to 100%.

2. prepare a technique for fast-drying type starch adhesive described in claim 1, it is characterized in that, comprise the following steps:

A () first adds water and W-Gum in the reactor of belt stirrer;

B () is stirred and is made water mix post-heating to 50 ~ 80 DEG C completely with starch;

C () adds appropriate sodium hydroxide solution, the pH value of solution is adjusted to 9.5 ~ 10;

D () adds the hydrogen peroxide that formula ratio is 1/2 while continuing to stir, react 30 minutes;

E () adds residual hydrogen sodium hydroxide solution, make starch pasting;

F () adds the borax that dissolved in advance and urea Keep agitation 30 minutes;

G () adds siccative and fully stirs evenly obtained finished product.