CN103467649B - Aqueous copolymerized acrylic emulsion - Google Patents

Abstract

The invention discloses an aqueous copolymerized acrylic emulsion which consists of the following components in parts by weight: 525 parts of butyl acrylate, 3.8 parts of an emulsifier, 0.3-0.4 part of a defoaming agent, 1.0-1.2 parts of a moistening agent, 0.9 part of tert-butyl hydroperoxide, 0.9 part of rongalit, 0.15 part of mercaptan, 2.5 parts of ammonium persulfate, 0.7 part of ammonium bicarbonate, 11.1 parts of hydroxyethyl acrylate, 5.5 parts of crylic acid, 6 parts of ammonium hydroxide and 448 parts of deionized water. A pressure sensitive adhesive tape which is prepared from the aqueous copolymerized acrylic emulsion has the characteristics that the drying speed is high, the low-temperature resistance property is good, and the pressure sensitive adhesive tape is unlikely to drop off.

Description

A kind of water-based co-polypropylene yogurt liquid

Technical field

The present invention relates to a kind of water-based co-polypropylene yogurt liquid, also relate to the preparation method of this water-based co-polypropylene yogurt liquid.

Background technology

Water-based co-polypropylene yogurt liquid is that a class has pressure-sensitive adhesive pressure being had to susceptibility, mainly for the preparation of Pressuresensitive Tape, has the feature of " sticky easy, to throw off and be not difficult, shell and do not damage ", develops very rapid because of easy to use, of many uses.Day by day perfect along with environmental requirement and social regulation, pressure-sensitive adhesive also changes from solvent borne hydrotropisms, and the market of water-borne pressure sensitive adhesive stick and application prospect are widely.In the market prepare Pressuresensitive Tape by water-borne pressure sensitive adhesive stick after majority have that glue easily comes off, the problem such as resistance to low temperature difference, to a certain degree have impact on the range of application of water-borne pressure sensitive adhesive.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of water-based co-polypropylene yogurt liquid, uses the present invention to prepare Pressuresensitive Tape and has that rate of drying is fast, resistance to low temperature good, the feature of difficult drop-off.

For solving the problems of the technologies described above, a kind of water-based co-polypropylene of the present invention yogurt liquid, by butyl acrylate, emulsifying agent, defoamer, wetting agent, tertbutyl peroxide, rongalite, mercaptan, ammonium persulphate, bicarbonate of ammonia, Hydroxyethyl acrylate, vinylformic acid, ammoniacal liquor and deionized water composition, each ingredients weight parts is respectively: butyl acrylate: 525 parts, emulsifying agent: 3.8 parts, defoamer: 0.3-0.4 part, wetting agent: 1.0-1.2 part, tertbutyl peroxide: 0.9 part, rongalite: 0.9 part, mercaptan: 0.15 part, ammonium persulphate: 2.5 parts, bicarbonate of ammonia: 0.7 part, Hydroxyethyl acrylate: 11.1 parts, vinylformic acid: 5.5 parts, ammoniacal liquor: 6 parts and deionized water: 448 parts.

Described emulsifying agent is emulsifying agent A-501 and Emulsifier O C-46, and weight part is respectively 0.3 part and 3.5 parts.

The weight part of described wetting agent is 1.0 parts, the weight part of defoamer is 0.3 part.

The weight part of described wetting agent is 1.2 parts, the weight part of defoamer is 0.4 part.

Prepare a method for water-based co-polypropylene yogurt liquid described in claim 1, comprise the following steps:

(1), in reactor, add the deionized water of 200 weight parts, start to stir, heat temperature raising, mixing speed is 40-50rpm, adds the bicarbonate of ammonia of 0.7 weight part and the emulsifying agent of 0.3 weight part after being warming up to 60 DEG C;

(2) in monomer tank, add the deionized water of 198 weight parts, start to stir, add the emulsifying agent of 3.5 weight parts, the Hydroxyethyl acrylate of 11.1 weight parts, the vinylformic acid of 5.5 weight parts, the butyl acrylate of 525 weight parts, the mercaptan of 0.15 weight part successively, be stirred to after above-mentioned mixing liquid viscosity is greater than 200cp and stop stirring, get above-mentioned mixed solution 30 weight part for subsequent use, in monomer tank, add the ammonium persulphate of 0.7 weight part afterwards again, obtain monomer mixed solution;

(3), the reactor in step (1) be warming up to about 70 DEG C, the 30 weight part mixed solutions taken out in step (2) joined in reactor, temperature rise to about 82 DEG C stablize after add the ammonium persulphate of 1.8 weight parts;

(4) start to drip monomer mixed solution obtained in step (2) after, the reactor in step (3) being continued to be warming up to 85 DEG C, control temperature of reaction kettle in 1 hour and be down to 83 ± 1 DEG C by 85 DEG C, continue to drip monomer mixed solution obtained in step (2), be added dropwise to complete in 3.5 hours, dropping temperature controls at 83 ± 1 DEG C, dropping terminates rear insulation 1 hour, holding temperature 83 ± 1 DEG C;

(5), in step (4), reactor insulation is cooled to 65 DEG C after terminating, add the deionized water of 10 weight parts and the tertbutyl peroxide of 0.9 weight part, add the deionized water of 10 weight parts and the rongalite of 0.9 weight part after static 10 minutes, after static 30 minutes, continue cooling;

(6) reactor, in step (5) adds the wetting agent of 1.0-1.2 weight part when being cooled to 50 DEG C, be cooled to after below 45 DEG C and add the chlorine water of 6 weight parts and the defoamer of 0.3-0.4 weight part, 100 order net filtrations packagings after being cooled to less than 38 DEG C.

After testing, technical indicator is as follows for water-based co-polypropylene yogurt liquid of the present invention:

Color: milky white liquid

PH value: 7-9

Solid content (%): 55 ± 1%

Viscosity: 60-200cp

180 degree of peeling forces (N): >=6.0

Initial bonding strength 13# ball (cm) :≤5.0

0 degree of hold tack (h/25mmKg) >=24

The present invention has following performance: odorless, nontoxic, large arch dam, rate of drying be fast, have good first sticky, peel off and hold tack.

Embodiment

Below in conjunction with embodiment, the present invention is described in further detail.

Embodiment:

First in reactor, add the deionized water of 200 weight parts, start stirring, heat temperature raising, mixing speed is 40-50rpm, adds the bicarbonate of ammonia of 0.7 weight part and the emulsifying agent of 0.3 weight part after being warming up to 60 DEG C; Then in monomer tank, add the deionized water of 198 weight parts, start to stir, add the emulsifying agent of 3.5 weight parts, the Hydroxyethyl acrylate of 11.1 weight parts, the vinylformic acid of 5.5 weight parts, the butyl acrylate of 525 weight parts, the mercaptan of 0.15 weight part successively, be stirred to after above-mentioned mixing liquid viscosity is greater than 200cp and stop stirring, get above-mentioned mixed solution 30 weight part for subsequent use, in monomer tank, add the ammonium persulphate of 0.7 weight part afterwards again, obtain monomer mixed solution; Reactor is warming up to about 70 DEG C, the 30 weight part mixed solutions taken out is joined in reactor, temperature rise to about 82 DEG C stablize after add the ammonium persulphate of 1.8 weight parts; Start to drip monomer mixed solution after again reactor being continued to be warming up to 85 DEG C, control temperature of reaction kettle in 1 hour and be down to 83 ± 1 DEG C by 85 DEG C, continue to drip monomer mixed solution, be added dropwise to complete in 3.5 hours, dropping temperature controls at 83 ± 1 DEG C, dropping terminates rear insulation 1 hour, holding temperature 83 ± 1 DEG C; Be cooled to 65 DEG C after question response still insulation afterwards terminates, add the deionized water of 10 weight parts and the tertbutyl peroxide of 0.9 weight part, after static 10 minutes, add the deionized water of 10 weight parts and the rongalite of 0.9 weight part, after static 30 minutes, continue cooling; Last question response still adds the wetting agent of 1.0-1.2 weight part when being cooled to 50 DEG C, be cooled to after below 45 DEG C and add the chlorine water of 6 weight parts and the defoamer of 0.3-0.4 weight part, 100 order net filtration packagings after being cooled to less than 38 DEG C.

Claims (1)

1. prepare a method for water-based co-polypropylene yogurt liquid, it is characterized in that comprising the following steps:

(1), in reactor, add the deionized water of 200 weight parts, start to stir, heat temperature raising, mixing speed is 40-50rpm, adds the bicarbonate of ammonia of 0.7 weight part and the emulsifying agent of 0.3 weight part after being warming up to 60 DEG C;

(2) in monomer tank, add the deionized water of 198 weight parts, start to stir, add the emulsifying agent of 3.5 weight parts, the Hydroxyethyl acrylate of 11.1 weight parts, the vinylformic acid of 5.5 weight parts, the butyl acrylate of 525 weight parts, the mercaptan of 0.15 weight part successively, be stirred to after above-mentioned mixing liquid viscosity is greater than 200cp and stop stirring, get above-mentioned mixed solution 30 weight part for subsequent use, in monomer tank, add the ammonium persulphate of 0.7 weight part afterwards again, obtain monomer mixed solution;

(3), the reactor in step (1) be warming up to 70 DEG C, the 30 weight part mixed solutions taken out in step (2) joined in reactor, temperature rise to 82 DEG C stable after add the ammonium persulphate of 1.8 weight parts;

(4) start to drip monomer mixed solution obtained in step (2) after, the reactor in step (3) being continued to be warming up to 85 DEG C, control temperature of reaction kettle in 1 hour and be down to 83 ± 1 DEG C by 85 DEG C, continue to drip monomer mixed solution obtained in step (2), be added dropwise to complete in 3.5 hours, dropping temperature controls at 83 ± 1 DEG C, dropping terminates rear insulation 1 hour, holding temperature 83 ± 1 DEG C;

(5), in step (4), reactor insulation is cooled to 65 DEG C after terminating, add the deionized water of 10 weight parts and the tertbutyl peroxide of 0.9 weight part, add the deionized water of 10 weight parts and the rongalite of 0.9 weight part after static 10 minutes, after static 30 minutes, continue cooling;

(6) reactor, in step (5) adds the wetting agent of 1.0-1.2 weight part when being cooled to 50 DEG C, be cooled to after below 45 DEG C and add the chlorine water of 6 weight parts and the defoamer of 0.3-0.4 weight part, 100 order net filtrations packagings after being cooled to less than 38 DEG C.