 Control of diameter of fiber insulation on conductors |
| What is claimed is: 1. A pulp vat apparatus for applying a layer of pulp fiber to conductors ... |
|
| Wetlaid nonwovens on high speed machines |
| OF THE PREFERRED EMBODIMENTS The term "polymeric surfactant" is defined as a molecule which ... |
|
| Press of a paper machine for thin papers |
| The object of the present invention is to provide a press section with which such transfer elements ... |
|
| Method of dewatering wet web using an integrally sealed air press |
| It has now been discovered that a wet-pressed tissue can be made having bulk and absorbency ... |
|
| Method for making soft tissue |
| It has now been discovered that an improved uncreped throughdried web can be made by dewatering the ... |
|
| Loading arrangement in a paper machine doctor |
| The present invention provides new kind of loading arrangement for a paper machine doctor, by means ... |
|
| Apparatus for drying a fibrous web |
| I claim: 1. An apparatus for drying a wet air-permeable web, comprising: a drum rotatable about an ... |
|
| Method of continuous drying of a paper or other porous web and a drying device for applying this method |
| I claim: 1. A method of continuous drying of a paper, cardboard, or other porous web, according to ... |
|
| Peripheral exhaust system for high velocity dryer |
| One object of my invention is to provide a peripheral exhaust system for a high velocity dryer ... |
|
| Apparatus and method for drying fibrous web material |
| According to the teachings of the present invention, the advantages of impulse drying are obtained ... |
|
|
Self-curing copolymers containing both hydroxyamide functions and carboxy or anhydride functions, and compositions
| Details |
Inventors: Cenci, Harry J.; Swift, Graham;
Assignee: Rohm and Haas Company (Philadelphia, PA)
Primary Examiner: Kight, III; John
Assistant Examiner:
Attorney, Agent or Firm:
.beta.-Hydroxyalkylamide polymers are disclosed as self-curing by means of carboxy or anhydride functions in said polymers. The polymers are effective in solution, aqueous emulsion and powder coating formulations. |
|
DETAILED DESCRIPTION We claim: 1.
A curable addition polymer containing (a) one or more carboxy groups, salts of said carboxy groups or carboxylic acid anhydride groups and (a) one or more pendant .
beta.
-hydroxyalkyl amide groups of the formula: ##STR10## wherein R.
sup.
3 is H or CH.
sub.
3.
2.
The composition of claim 1 in which the carboxy, salt or anhydride groups are the residues of at least one ethylenically unsaturated acid monomer selected from acrylic, methacrylic, maleic, or itaconic acids and maleic anhydride, the acid monomer and hydroxyamide monomer each being used in the copolymer in the amount of 1% to 20% by weight of the monomers in the copolymer, and the ratio of hydroxyamide functional groups to salt, carboxy, or anhydride functional groups is between about 0.
5 and about 2, wherein one anhydride group is equal to two carboxy functions.
3.
The composition of claim 1 contained in water or an organic liquid selected from aromatic and aliphatic hydrocarbons, dimethyl formamide, ethers, ketones, esters, and alcohols.
4.
The method of curing the composition of claim 1 comprising the step of heating it at a temperature of from 125.
degree.
C.
to 400.
degree.
C.
until the polymer is cured.
5.
The method of curing the composition of claim 2 comprising the step of heating it at a temperature of from 125.
degree.
C.
to 400.
degree.
C.
until the polymer is cured.
6.
The method of curing the composition of claim 3 comprising the step of heating it at a temperature of from 125.
degree.
C.
to 400.
degree.
C.
until the polymer is cured.
Description:
This invention relates to a novel method for curing or crosslinking polymers having carboxy or anhydride groups and .
beta.
-hydroxyalkylamide groups, that is, self-curing polymers containing both carboxy and .
beta.
-hydroxyalkylamide functionality.
Studies show that the .
beta.
-hydroxyalkylamide functions employed in this invention provide efficient self-curing of carboxy or anhydride units contained in the same polymers, and can be employed without any catalyst being required
|
|
Manufacturing Materials 
