SU499278A1 - The method of producing synthetic latex - Google Patents

The method of producing synthetic latex

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Publication number
SU499278A1
SU499278A1 SU2037059A SU2037059A SU499278A1 SU 499278 A1 SU499278 A1 SU 499278A1 SU 2037059 A SU2037059 A SU 2037059A SU 2037059 A SU2037059 A SU 2037059A SU 499278 A1 SU499278 A1 SU 499278A1
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SU
USSR - Soviet Union
Prior art keywords
monomers
latex
synthetic latex
producing synthetic
hours
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Application number
SU2037059A
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Russian (ru)
Inventor
Людмила Николаевна Афанасьева
Рахиль Израйлевна Миркина
Павел Иудович Рахлин
Оскар Самуилович Чечик
Герман Сергеевич Тихомиров
Иван Федорович Сотников
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Предприятие П/Я В-8415
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Application filed by Предприятие П/Я В-8415 filed Critical Предприятие П/Я В-8415
Priority to SU2037059A priority Critical patent/SU499278A1/en
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Publication of SU499278A1 publication Critical patent/SU499278A1/en

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Description

гировавшйх мономеров и готовый латекс характеризуют содержанием метакриловой кислоты в полимере латекса (по разности между введенным количеством кислоты и определенным в водной фазе латекса), количеством образовавшегос  гомополимера в водной фазе (кондуктометрическим титрованием), устойчивостью к механическим воздействи м (на приборе Марона), устойчивостью к действию электролитов (по порогу коагул ции под действием водных растворов), рН, поверхностным нат жением (на приборе ДюНуи ).coated monomers and finished latex are characterized by the content of methacrylic acid in the latex polymer (according to the difference between the amount of acid introduced and the latex determined in the aqueous phase), the amount of homopolymer formed in the aqueous phase (conductometric titration), resistance to mechanical effects (on the Maron apparatus), resistance to the action of electrolytes (at the coagulation threshold under the action of aqueous solutions), pH, surface tension (on the DuNui device).

Пример 1. Провод т сополимеризацию смеси мономеров - 60 вес. ч. стирола и 40 вес. ч. бутадиена по рецепту, описанному выше. В аппарат емкостью 60 л загружают водную фазу, содержащую эмульгатор, иницатор , воду, мономеры - стирол и бутадиен. Смесь перемешивают и нагревают до 60°С. Полимеризацию провод т в течение 1,5 ч до содержани  незаполимеризовавшихс  мономеров 3% (определение провод т хроматографически ). Затем в латекс ввод т 5 вес. ч. метакриловой кислоты (в расчете на 100 вес. ч. мономеров) в виде 10%-ного водного раствора, поднимают температуру в аппарате до 80°С и провод т графт-полимеризацию в течение 8 ч. После этого из латекса удал ют остатки незаполимеризовавшихс  мономеров дегазацией.Example 1. A mixture of monomers is copolymerized to 60 wt. including styrene and 40 wt. including butadiene according to the recipe described above. A 60 liter apparatus is charged with an aqueous phase containing an emulsifier, an initiator, water, styrene monomers, and butadiene. The mixture is stirred and heated to 60 ° C. The polymerization is carried out for 1.5 hours until the content of the non-polymerized monomers is 3% (the determination is carried out chromatographically). Then 5 wt. including methacrylic acid (based on 100 parts by weight of monomers) in the form of a 10% aqueous solution, raise the temperature in the apparatus to 80 ° C and graft polymerization is carried out for 8 hours. After that, residues are removed from the latex non-polymerized monomers by degassing.

Пример 2. Услови  проведени  сополимеризации мономеров такие же, как и в примере 1, с тем отличием, что при содержании незаполимеризовавшихс  мономеров, равном 1,5%, в латекс ввод т 3 вес. ч. водного раствора (в расчете на мономеры) метакриловой кислоты и 0,1% инициатора - персульфата кали , поднимают температуру в аппарате до 90°С и провод т графт-полимеризацию в течение 6 ч.Example 2. The conditions for carrying out the copolymerization of monomers are the same as in Example 1, with the difference that when the content of non-polymerized monomers is 1.5%, 3 weight is added to the latex. including aqueous solution (based on monomers) of methacrylic acid and 0.1% potassium persulfate initiator, raise the temperature in the apparatus to 90 ° C and graft polymerization is carried out for 6 hours.

Пример 3. Услови  проведени  сополимеризации мономеров такие же, как в примере 1, с тем отличием, что при содержании незаполимеризовавшихс  мономеров, равномExample 3. The conditions for carrying out the copolymerization of the monomers are the same as in Example 1, with the difference that when the content of non-polymerized monomers is equal to

1%, в латекс ввод т 1 вес. ч. водного раствора метакриловой кислоты в расчете на 100 вес. ч. мономеров, поднимают температуру в аппарате до 90°С и провод т графт-пслимеризацию в течение 2 ч.1%; 1 wt. including aqueous solution of methacrylic acid per 100 weight. including monomers, raise the temperature in the apparatus to 90 ° C and carry out graft-plysmerization for 2 hours.

Примеры 4-7. Услови  сополимеризации мономеров те же, что и в примере 1, с тем отличием, что при содержании незаполимеризовавшихс  мономеров, равном 1, 2, 3,Examples 4-7. The conditions for the copolymerization of monomers are the same as in Example 1, with the difference that when the content of non-polymerized monomers is 1, 2, 3,

4%, ввод т в латексы водные растворы 3 вес. ч. (в расчете на 100 вес. ч. мономеров) метакриловой кислоты, нагревают до 80°С и провод т графт-полимеризацию в течение 5 ч.4%; aqueous solutions of 3 wt. Are introduced into latex. hours (based on 100 parts by weight of monomers) of methacrylic acid, heated to 80 ° C and graft polymerization carried out for 5 hours.

Характеристика латексов в примерах 1-7 приведена в таблице.The characteristics of the latexes in examples 1-7 are given in the table.

SU2037059A 1974-06-28 1974-06-28 The method of producing synthetic latex SU499278A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU2037059A SU499278A1 (en) 1974-06-28 1974-06-28 The method of producing synthetic latex

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU2037059A SU499278A1 (en) 1974-06-28 1974-06-28 The method of producing synthetic latex

Publications (1)

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SU499278A1 true SU499278A1 (en) 1976-01-15

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