GB1360672A - Microporous sheet structures - Google Patents
Microporous sheet structuresInfo
- Publication number
- GB1360672A GB1360672A GB3921871A GB3921871A GB1360672A GB 1360672 A GB1360672 A GB 1360672A GB 3921871 A GB3921871 A GB 3921871A GB 3921871 A GB3921871 A GB 3921871A GB 1360672 A GB1360672 A GB 1360672A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diisocyanate
- prepolymer
- active hydrogen
- hydrogen containing
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Textile Engineering (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
- Polyurethanes Or Polyureas (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
1360672 Coating processes CARL FREIDENBERG 20 Aug 1971 [22 Aug 1970] 39218/ 71 Heading B2E [Also in Division C3] A process of preparing a microporous sheet on a support by coagulation comprises forming a solution in a solvent of a polyurethane prepolymer obtained by reacting a first active hydrogen containing component having a molecular weight above 400 with a polyisocyanate and reacting this prepolymer in the solution with second active hydrogen containing component having a molecular weight less than 400 and a polyisocyanate, the total amount of second active hydrogen containing component and polyisocyanate that reacts with the prepolymer being from 20 to 40% by weight of the prepolymer, to form a final polymer which is insoluble or only slightly soluble in the solvent, spreading the solution during reaction as a layer on a support and removing the solvent. Suitable first active hydrogen containing components are polyester polyols, polyether polyols, polycaprolactam polycaprolactones and polycarbonates; examples of polyesters being decarboxylic acids and glycols or glycol mixtures. The isocyanates used to form the prepolmer may include 4,4'-diphenylmethane diisocyanate, 1,5 naphthalene diisocyanate, 1,4- phenylene diisocyanate, tolylene diisocyanate, tolylene diisocyanate, xylylene diisocyanate, isiphorone diisocyanate, hexamethylene diisocyanate, 4,4'-dicyclohexylmethyne diisocyanate, or mixtures thereof. The molar ration of polyol to diisocyanate is 2:1 or from 1:1.2 to 1:2, and the prepolymer is formed at elevated temperatures, for example for 10 minutes at 130‹C. Additional isocyanate added to the prepolymer solution includes those described above and the second active hydrogen containing component is predominantly difunctional but may contain a few percent trifunction compounds. Suitable difunctional compounds are diols and diamines, for example butan-1, 4-diol, propane-1,2-diol, propane-1,3-diol and ethylene glycol. To accelerate reaction of prepolymer with the isocyanate and active hydrogen containing reagents catalysts such as triethylene diamine, dibutyl tin dilaurate and tin dioctoate are uses. Suitable supports include glass sheet or paper from either of which the microporous coating sheet is stripped, or a non-woven fibre structure to which the coating sheet may adhere. The reacting solution of final polymer and precursors may be sandwiched between two films to provide a gas permeable bond therebetween and the solution may contain conventional additions such as mineral fillers, pigments, dyes, silicones and emulsifiers. The amount of second active hydrogen containing component and polyisocyanate is preferably 20 to 40% by wt. of the amount of prepolymer. The amount of solvent is preferably from 15 to 50% by wt. of the reaction constituents. Three specific examples are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702041710 DE2041710C3 (en) | 1970-08-22 | 1970-08-22 | Process for the production of microporous water vapor and air permeable flat structures based on polyurethane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1360672A true GB1360672A (en) | 1974-07-17 |
Family
ID=5780440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3921871A Expired GB1360672A (en) | 1970-08-22 | 1971-08-20 | Microporous sheet structures |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5037711B1 (en) |
| AT (1) | AT309086B (en) |
| CH (1) | CH522695A (en) |
| DE (1) | DE2041710C3 (en) |
| GB (1) | GB1360672A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4746684A (en) * | 1986-05-21 | 1988-05-24 | Dainichiseika Color & Chemicals Mfg. Co., Ltd. | Polyurethane dispersion and emulsion, sheet-like porous material and production process thereof |
-
1970
- 1970-08-22 DE DE19702041710 patent/DE2041710C3/en not_active Expired
-
1971
- 1971-06-28 CH CH943571A patent/CH522695A/en not_active IP Right Cessation
- 1971-08-19 JP JP6331371A patent/JPS5037711B1/ja active Pending
- 1971-08-20 AT AT731271A patent/AT309086B/en active
- 1971-08-20 GB GB3921871A patent/GB1360672A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2041710B2 (en) | 1977-06-30 |
| AT309086B (en) | 1973-08-10 |
| DE2041710A1 (en) | 1972-02-24 |
| DE2041710C3 (en) | 1979-05-31 |
| JPS5037711B1 (en) | 1975-12-04 |
| CH522695A (en) | 1972-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |